ATLAS Blog https://atlas.cern/ en Una storia 3D lunga 20 anni https://atlas.cern/it/node/1714 <span>Una storia 3D lunga 20 anni</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Thu, 09/10/2020 - 18:35</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/claudio-bortolin" hreflang="en">Claudio Bortolin</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/cooling-systems" hreflang="en">cooling systems</a></div> <div class="field--item"><a href="/tags/mock" hreflang="en">mock-up</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class=""><a href="//cds.cern.ch/images/CERN-PHOTO-201605-112-1" title="View on CDS"><img alt="ATLAS,Accelerators" src="//cds.cern.ch/images/CERN-PHOTO-201605-112-1/file?size=large" /></a><figcaption>Il mock-up della parte centrale di ATLAS in scala reale (a sinistra) con a fianco una delle bobine del magnete toroidale superconduttore. (Image: S. Bennett/CERN)</figcaption></figure> <p>Nel 2014, pochi mesi dopo il mio passaggio da ALICE ad ATLAS, vidi per la prima volta il mock-up di ATLAS, una riproduzione in scala reale in legno della porzione centrale dell’esperimento. Quel giorno mi trovavo con Jan Godlewski, anche lui ingegnere, mio compagno d’ufficio e allora Cooling Coordinator di ATLAS. Di li a qualche tempo lui sarebbe andato in pensione ma con il suo solito sorriso cominciò a raccontarmi che fu proprio lui, nel 2001, il responsabile della costruzione di quest’opera artigianale, insieme ad altre 3 collaboratori. </p> <p>L’obiettivo era quello di verificare le geometrie delle varie parti dei rivelatori ancora in fase di costruzione ed esercitarsi poi nell’installazione di centinaia di cavi di alimentazione, acquisizione dati e i tubi che vennero usati per testare il sistema di affreddamento dei rivelatori centrali, in vista della loro installazione cosa poi avvenuta in caverna sperimentale nel 2007. </p> <p>Rimasi catturato dal tono del racconto, era come se Jan mi stesse raccontando l’ennesima avventura, una delle tante che potreste sentire dai fisici e ingegneri al CERN. Affascinato dall’accuratezza di alcuni particolari, mai mi sarei immaginato che qualche anno dopo a distanza di 15 anni sarei stato proprio io a “ritirarlo fuori dal cassetto” perché una nuova missione lo attendeva. </p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">E perché dopo tutto questo tempo quest’opera artigianale alta quasi 8 metri e larga altrettanto è diventata di nuovo essenziale?</h3> <hr class="divider"> <div class="narrow"> <figure class="right mobile-float img-50"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2020-036-1" title="View on CDS"><img alt="Inner Detector,Testing,Milestones,Technology,Detectors,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-036-1/file?size=large" /></a><figcaption>Il modello in legno di ATLAS con il sistema di raffreddamento a CO2 attualmente in funzione. (Image: J. Noite/ATLAS Collaboration)</figcaption></figure> <p>E perché dopo tutto questo tempo quest’opera artigianale alta quasi 8 metri e larga altrettanto è diventata di nuovo essenziale? Non bastano i modelli 3D che riproducono fedelmente gli spazi disponibili? Si, ma non del tutto. Nel 2016 il “mock-up” è diventato di nuovo operativo, circondato da tralicci in acciaio come i palchi dei concerti rock ed equipaggiato di tubi collegati ad un nuovo impianto di raffreddamento. Parliamo di raffreddamento evaporativo a CO2 che al CERN è diventata la principale tecnologia di raffreddamento per i futuri tracciatori di ATLAS e CMS. Il nuovo rivelatore avrà delle performance pazzesche e per sopravvivere alle radiazioni presenti l’elettronica deve essere mantenuta a -40C. </p> <p>Spinti dalla necessità di costruire rivelatori sempre più potenti e funzionanti in condizioni di lavoro estreme, ATLAS con il contributo di CMS, ha lanciato il progetto di R&amp;D denominato Baby-DEMO. Il progetto del quale sono il responsabile, è realizzato da un team di ingegneri e tecnici che stanno lavorando per fornire la tecnologia di raffreddamento più idonea e allo stesso tempo compatibile con la riduzione dei gas di refrigerazione ad effetto serra come i freon. </p> <p>Il mock-up è nuovamente lo strumento ideale per permetterci di realizzare gli studi approfonditi delle performance del sistema di raffreddamento, verificarne i limiti e provare a superarli. Oggi questo impianto è funzionante e a disposizione anche degli esperti che stanno sviluppando i prototipi dei rivelatori e il team che si occupa dell’integrazione dei nuovi cavi perché, come vent’anni fa, la realtà è ancora il migliore modello 3D disponibile e si, come Jan, ho una nuova storia da raccontare.</p> </div><div style="clear: both; height: 0;"></div> </div> Thu, 10 Sep 2020 16:35:00 +0000 Steven Goldfarb 6683 at https://atlas.cern Exploring the “coolest” mock-up https://atlas.cern/updates/blog/exploring-coolest-mockup <span>Exploring the “coolest” mock-up</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Thu, 09/10/2020 - 16:28</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/claudio-bortolin" hreflang="en">Claudio Bortolin</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/cooling-systems" hreflang="en">cooling systems</a></div> <div class="field--item"><a href="/tags/upgrade" hreflang="en">upgrade</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class=""><a href="//cds.cern.ch/images/CERN-PHOTO-201605-112-1" title="View on CDS"><img alt="ATLAS,Accelerators" src="//cds.cern.ch/images/CERN-PHOTO-201605-112-1/file?size=large" /></a><figcaption>The ATLAS mock-up of the central detector (left) sitting next to the B0 magnet, the 1/3rd length prototype of the experiment’s superconducting magnet. (Image: S. Bennett/CERN)</figcaption></figure> <p>It was in 2014, just a few months after my transition from ALICE to ATLAS, that I saw the mock-up for the first time: a full-scale wooden reproduction of the central portion of the ATLAS experiment, measuring some 8 metres high and wide.</p> <p>I was with my office mate Jan Godlewski that day, who would retire some months later. Like me, he was a mechanical engineer, as well as being the Cooling Coordinator of ATLAS. With his usual smile he started to tell me that, in 2001, he was in charge of the construction of such handicraft objects, along with 3 other collaborators. The goal at the time was to verify detector geometries, checking for available gaps where hundreds of power and read-out cables could be installed. These mock-ups were also employed to test the pipes used in the evaporative cooling system of the central detectors, in preparation for the actual installation in the experimental cavern which happened in 2007.</p> <p>There I was, in the middle of yet another fascinating story that Jan was describing like an adventure – one of the many you might hear at CERN if you talk with physicists and engineers. Enthralled by the accuracy of some details, I would never have imagined that a couple of years later the mock-up would become my second office at CERN. 15 years after its first installation, we pulled it out of the drawer because a new mission awaited it.</p> <p>But why, after all this time, was a wooden mock-up once again essential? Are the 3D models that faithfully reproduce the available spaces not enough? Partially yes, but not completely.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">These new detectors will have crazy performance – their electronics will have to be kept at -40°C in order for them to survive the high radiation environment.</h3> <hr class="divider"> <div class="narrow"> <figure class="right mobile-float img-50"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2020-036-1" title="View on CDS"><img alt="Inner Detector,Testing,Milestones,Technology,Detectors,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-036-1/file?size=large" /></a><figcaption>A view of the ATLAS mock-up’s current set-up as the testing location for a new CO2 cooling system. (Image: J. Noite/ATLAS Collaboration)</figcaption></figure> <p>In 2016, the mock-up became operational once again. Installed in one of the CERN workshops, it is surrounded by truss structures – as if on the stage of a rock concert – and equipped with pipes connected to a new cooling system. It is helping us test CO<sub>2</sub> evaporative cooling technology, which at CERN will make up the main cooling systems of future ATLAS and CMS trackers. These new detectors will have crazy performance, and their electronics will have to be kept at -40°C in order for them to survive the high radiation environment. </p> <p>In order to build such increasingly powerful detectors, operating in extreme working conditions, we have to develop new solutions. Thus the ATLAS Collaboration, together with contributions from CMS, launched an R&amp;D project called Baby-DEMO. The project, which I am in charge of, is carried out by a team of engineers and technicians working to provide the ATLAS with the most suitable and greener cooling technology. Transitioning to CO<sub>2</sub> evaporative cooling will allow us to reduce the usage of Freon and other greenhouse refrigeration gases in our experiments.</p> <p>The mock-up is the ideal tool for performing an in-depth study of the cooling system, because we can check our limits and try to overcome them. It is also being used to verify various other functionalities of new detectors, and is available to teams developing detector prototypes or working on the integration of the new cables. Proving that, just as it was twenty years ago, reality is still the best 3D model available. </p> <p>Now I, just like Jan, have a story to tell!</p> </div><div style="clear: both; height: 0;"></div> </div> Thu, 10 Sep 2020 14:28:00 +0000 Steven Goldfarb 6682 at https://atlas.cern Connecting during COVID-19: Updates from the (physically but not socially distanced) Early Career Scientist Board https://atlas.cern/updates/blog/connecting-during-covid19 <span>Connecting during COVID-19: Updates from the (physically but not socially distanced) Early Career Scientist Board</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Wed, 07/01/2020 - 13:16</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/sukanya-sinha" hreflang="en">Sukanya Sinha</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/atlas-collaboration" hreflang="en">ATLAS Collaboration</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><figure class=""><img alt="" src="https://atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/field/image/Meet-Eat-April2020.jpg" /><figcaption>Participants of the first fully-virtual ATLAS Meet &amp; Eat event!</figcaption></figure> <p>The times we are living in bring new challenges for all. As a community, we need to stay in contact, remain motivated and learn from each other's experiences. The work-from-home situation is one to which everyone has to adjust, balancing personal and professional lives, while accepting the effect of the ongoing pandemic on society. Despite these challenges, the ATLAS Early Career Scientist Board (ECSB) developed a series of events to boost the morale of the ECS community and to help people connect, even when they are sitting miles away from each other. I joined the ATLAS ECSB in March 2020, and to be honest, it has felt great to be a part of something that makes a difference in people’s lives – even if it’s just to laugh together. </p> <p>Following the success of the informal Meet &amp; Eat events, we held a special virtual edition of the Meet &amp; Eat event during the weeks of 13 to 24 April 2020. As in previous editions (<a href="https://atlas.cern/updates/atlas-blog/serving-new-winter-recipes-ECSB">read Luigi’s blog</a> about the winter events), we paired PhD students and junior postdoctoral fellows with more senior postdoctoral fellows and faculty in the collaboration so they can have a chat. But this time the pairs were asked to meet up over video messengers instead of the usual face-to-face lunch meetings at CERN. </p> <p>Over the two weeks, 32 junior–senior pairs met up to share their experiences with each other or just to have a friendly chat with someone they wouldn’t have met otherwise. Humans are social beings by design – a fact that was further proven by the positive feedback for the Virtual Meet &amp; Eat event we received, along with suggestions to improve the upcoming versions. </p> <p>Alongside the ATLAS Meet &amp; Eat event, the Young Scientists Fora at the LHC (early career scientist boards from ATLAS, CMS, ALICE &amp; LHCb) joined forces to organise a series of networking/soft skills workshops, with each event focusing on different career development skills. </p> <p>Given the current COVID-19 situation, the first soft-skills workshop of the year was on the topic of working from home. On 15 April 2020, over 200 participants connected via a video messenger to share experiences and tips for getting the most out of the present working-from-home situation. The event started with a short introduction, followed by a roundtable session with speakers invited from different groups and projects, including Women in Technology, the <a href="https://www.facebook.com/ATLASexperiment/videos/660649641456055/">#PhysicistsAtHome social campaign</a> and the LHCb/ALICE Starterkit initiative. They shared their tips for being productive while working from home, and how they are balancing their personal and professional lives during these difficult times. Presentations were followed by fruitful discussion among speakers and participants. The event was well received by the LHC community in general and motivated the effort to brainstorm ideas for future networking events.</p> <hr class="divider"> <p><em>“I really enjoyed hearing everyone's advice for working from home during the networking event. My favorite piece of advice was to try to end your work for the day on a 'high note', so that it is easier to get started the next day!” – </em>Emily Anne Thompson</p> <p><em>“If possible, choose a place to work at home, and do nothing there but work. This could be a certain table or corner of a room.” – </em>Rebecca Gonzalez Suarez</p> <hr class="divider"> <p>Since joining ECSB, I have had the chance to see the collaboration from an altogether different perspective. It is a booming community of brilliant minds, where social interactions are a necessary part of the research. The recent ECSB events have not only helped people develop necessary skills for career advancement, they have also helped people connect with one another despite the distance. Organising them was truly worth the effort! I personally enjoyed participating in both, and learnt a lot about how to deal with all the associated issues that one might be facing during such extraordinary times. One thing is for sure, no matter the circumstances, we will get through them together!</p> </div> Wed, 01 Jul 2020 11:16:00 +0000 Steven Goldfarb 6670 at https://atlas.cern You want me to present a poster…. remotely? https://atlas.cern/updates/blog/you-want-me-present-poster-remotely <span>You want me to present a poster…. remotely? </span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Mon, 06/22/2020 - 18:46</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/members-atlas-collaboration" hreflang="en">Members of the ATLAS Collaboration</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/lhcp-2020-0" hreflang="en">LHCP 2020</a></div> <div class="field--item"><a href="/tags/lhcp-0" hreflang="en">LHCP</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">A typical conference poster session experience compared to the socially-distanced experience. (Images: ICHEP 2018 (left) and C. Montgomery/Unsplash (right))</div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><figure class=""><img alt="" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/PosterSession.jpg" /><figcaption>A typical conference poster session experience compared to the socially-distanced experience. (Images: ICHEP 2018 (left) and C. Montgomery/Unsplash (right))</figcaption></figure> <div class="narrow"> <p>The <a href="http://atlas.cern/tags/lhcp-2020">Large Hadron Collider Physics conference</a> held its first virtual edition last month. While attending virtual talks is commonplace in particle physics, for the first time attendees also participated in virtual poster sessions. </p> <p>Though an academic affair, poster sessions are also an opportunity to network and socialise with colleagues. Typically, a large hall will be filled with rows of poster stands, their authors standing anxiously beside them, anticipating whatever question may be posed by a passer-by. Finger food and drinks are usually served. Sometimes these encounters lead to in-depth discussions about a new result but, more often than not, they just serve as ice-breakers for would-be colleagues, or a kind of “physics buffet” for conference attendees to sample subjects outside their specialization. Could such an experience be recreated in an online conference? </p> <p>For LHCP2020, participants were instead asked to provide 3-minute video presentations of their poster. They then participated in an open Zoom connection, where colleagues could connect and ask questions about their work. Members of the ATLAS Collaboration share their experience taking part, as well as their overall impressions of the conference.</p> <hr class="divider"> <figure class="mobile-float img-30 right"><a href="https://indico.cern.ch/event/856696/contributions/3856947/attachments/2045844/3428282/posterHTT_LHCP2020.pdf" title="View on CDS"><img alt="Collaboration,Physics,Meetings,Diagrams,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-017-1/file?size=large" /></a></figure> <h3>Ana Luísa Carvalho, LIP</h3> <p>"Attending LHCP was a great opportunity, but of course it went a bit differently than what I originally envisioned. I had imagined myself in Paris but ended up attending from my desk. Nonetheless, I think everything worked wonderfully well and it was a truly remarkable achievement to hold such a huge conference entirely online. Weirdly enough, there were some upsides to it. Attending from home means that the distractions associated with being in a room filled with people are gone, allowing you to focus solely on the talks. </p> <p>For the poster presentation, I was able to comfortably wait in my Zoom meeting room instead of having to awkwardly stand next to my poster waiting for someone to approach me. We were also encouraged to record a small video explaining the poster, which is a great way of publicising our work and making it widely accessible even after the conference is over. Hopefully this crazy experience will lead to more conferences being held partially remotely, making them accessible to a wider audience."</p> <figure class="mobile-float img-30 left"><a href="https://indico.cern.ch/event/856696/contributions/3856041/attachments/2043638/3428493/Meirin_LHCP_poster_v5.pdf" title="View on CDS"><img alt="Collaboration,Physics,Meetings,Diagrams,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-017-3/file?size=large" /></a></figure> <hr class="divider"> <h3>Meirin Oan Evans, University of Sussex</h3> <p>"This was my first virtual conference, and in particular the first virtual poster session! I did find that fewer people beamed into my poster ‘Zoom room’ than the number of people that would usually stop for a quick chat about my poster during an in-person poster session. That reminded me how important it is to have a catchy title! </p> <p>However, I found that the chats I did have were higher quality than the average chat during an in-person poster session. Virtually, it was even easier to follow-up with an interested poster inspector. All that had to be done was type an email address into the Zoom chat and an exchange could be started!"</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">"Hopefully this crazy experience will lead to more conferences being held partially remotely, making them accessible to a wider audience."</h3> <hr class="divider"> <div class="narrow"> <figure class="mobile-float img-30 right"><a href="https://indico.cern.ch/event/856696/contributions/3856951/attachments/2045726/3427344/Poster_Franchino_ATLAS_L1CaloUpgrade_LHCP2020.pdf" title="View on CDS"><img alt="Collaboration,Physics,Meetings,Diagrams,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-017-2/file?size=large" /></a></figure> <h3>Silvia Franchino, Heidelberg University</h3> <p>"Though I could attend only a few talks of the conference, I did present a poster during the virtual session. The idea of the video presentation was nice, as was the idea of having all posters loaded in Indico. However, I found the two hours allocated to answer questions to be a bit of lost time, since nobody did actually connect to ask questions."</p> <hr class="divider"> <figure class="mobile-float img-30 left"><a href="https://indico.cern.ch/event/856696/contributions/3856037/attachments/2044396/3427816/CERNOpenDays_LHCPPoster_AnaPeixoto.pdf" title="View on CDS"><img alt="Collaboration,Physics,Meetings,Diagrams,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-017-4/file?size=large" /></a></figure> <h3>Ana Peixoto, LIP</h3> <p>"LHCP2020 was not only my first LHCP, but also my first online conference. The more compact programme (in order to include people from all over the world) allowed me to follow the subjects that I am more interested in in more detail. Perhaps, with a more spread out timetable, I would have also been able to listen to other not so familiar topics. My contribution to the conference was done through a poster, which was where the difference between an online and in-person poster session was more noticeable. </p> <p>The 3-minute video explanation and the meeting room for each poster were good supplements with a reasonable participation, even if not as extensive as previous LHCP conferences (and that is understandable!). Personally, I found the outcome positive, with the traditional programme discussing a wide range of particle-physics topics and several key results being presented for the first time. In summary, I was very happy to participate and learn through this important conference taking into account that, had it not been organised online, the probability of my attendance would have been highly reduced."</p> </div><div style="clear: both; height: 0;"></div> </div> Mon, 22 Jun 2020 16:46:00 +0000 Steven Goldfarb 6669 at https://atlas.cern Serving up new winter recipes with the ATLAS Early Career Scientist Board https://atlas.cern/updates/blog/serving-new-winter-recipes-ECSB <span>Serving up new winter recipes with the ATLAS Early Career Scientist Board</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Fri, 02/28/2020 - 18:03</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/luigi-marchese" hreflang="en">Luigi Marchese</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/atlas-collaboration" hreflang="en">ATLAS Collaboration</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2020-005-1" title="View on CDS"><img alt="Collaboration,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-005-1/file?size=large" /></a><figcaption>Photos and comments from the 2019 ATLAS Meet-And-Eat participants. (Image: ATLAS Collaboration/CERN)</figcaption></figure> <p>In 2019, I joined the ATLAS Early Career Scientist Board (ECSB): a special advisory group dedicated to assisting the ATLAS Collaboration in building an environment where the full scientific potential of scientists at the start of their career can be realised. The board organises several activities for the ATLAS community (you may have seen all of our summer activities described in <a href="https://atlas.cern/updates/atlas-blog/new-atlas-members-welcome-board">this blog</a>). I was actively involved in the winter activities. They were all fantastic experiences to improve social relationships in a 5000-people collaboration. </p> <figure class="right mobile-float img-50"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2020-005-3" title="View on CDS"><img alt="Collaboration,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-005-3/file?size=large" /></a><figcaption>ATLAS Meet-And-Eat event, 2019 recipe. (Image: ATLAS Collaboration/CERN)</figcaption></figure> <p>Winter in Geneva can be tough. However, for the third year in a row, the ECSB cooked up one of its most famous recipes: <a href="https://indico.cern.ch/event/847795/">Meet-And-Eat</a> (<em>link internal</em>). From 11 November to 13 December 2019, junior and senior ATLAS members had a chance to have <em>one-on-one lunch meetings</em> at the CERN cafeteria or over video chat. PhD students and junior Post-Doctoral researchers (PostDocs) were randomly matched to a senior ATLAS member, giving them an opportunity to meet with someone with a vast experience to be shared. This event was the perfect time to share doubts on their future in the field and to receive career advice from someone who has gone through the same path. There were so many interesting anecdotes senior ATLAS academics also enjoyed sharing with the next generation. Additionally, ATLAS members had the opportunity to get to know colleagues and students who are not part of their working groups. </p> <p>This winter recipe included a “fork” of topics (see "recipe" on right), in case conversation ever got stuck. I myself registered for past events and received useful advice for future applications… as well as a free dessert!</p> <p>In order to be more inclusive, the 2019 recipe came also with a Skype variation. A total of 32 senior PostDocs and academics and 58 students and junior PostDocs participated in the 2019 Meet And Eat. Judging from the food critic, both the recipe and its variation were well received. </p> <figure class="left mobile-float img-50"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2020-005-2" title="View on CDS"><img alt="Collaboration,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2020-005-2/file?size=large" /></a><figcaption>ATLAS networking events, 2019 recipe. (Image: ATLAS Collaboration/CERN)</figcaption></figure> <p>Last November, the ECSB also launched a new winter recipe: a series of networking events. At each event, international experts would focus on a specific topic in career development, and host a question and answer session. Topics covered include CV organisation, grant writing, importance of networking, negotiations for a new job, interview preparation, science communication, etc. </p> <p>On 6 November 2019, 56 ATLAS members received useful suggestions on how to write a good grant proposal by Pablo Tello, Section Head of the EU Support Group (Development of EU Projects &amp; Initiatives, CERN). The material for this first event is available <a href="https://indico.cern.ch/event/855104/">here</a>. A round table was also organised with three ATLAS members who were awarded with or were in the decision panel for research grants: Kerstin Tackman, David Strom and Sinead Farrington. Remote participation was possible. The event was highly appreciated by young ATLAS members. </p> <p>Mouth watering? If you found some interesting ingredients in the ECSB winter recipes, follow us on our <a href="https://ecsb.web.cern.ch/">webpage</a> (<em>link internal</em>) or <a href="https://www.facebook.com/ATLAS.ECSB/">Facebook page</a> for the 2020 summer recipes. Stay tuned, since the 2020 <em>Meet-And-Eat</em> and the next networking event could include a delicious dessert!</p> <p>After one year, I can say joining the ECSB has been one of the best decisions I have made as a member of ATLAS. It has changed my understanding of the collaboration. ATLAS is not only an industry for scientific papers. It’s a community of more than 5000 people where social interactions are key to successfully publishing all the physics results.</p> </div> Fri, 28 Feb 2020 17:03:00 +0000 Steven Goldfarb 6657 at https://atlas.cern Sharing the Excitement of ATLAS https://atlas.cern/updates/blog/sharing-excitement-atlas <span>Sharing the Excitement of ATLAS</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Sun, 12/22/2019 - 11:07</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-subtitle field--type-text field--label-hidden field--item">An end of the year visit to LHC&#039;s largest particle detector</div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/steven-goldfarb" hreflang="en">Steven Goldfarb</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/detectors" hreflang="en">Detectors</a></div> <div class="field--item"><a href="/tags/education" hreflang="en">Education</a></div> <div class="field--item"><a href="/tags/outreach" hreflang="en">Outreach</a></div> <div class="field--item"><a href="/tags/public-engagement-0" hreflang="en">Public Engagement</a></div> <div class="field--item"><a href="/tags/ippog-0" hreflang="en">IPPOG</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">ATLAS PhD student Kiley Kennedy asks ATLAS to smile during our end of year visit underground. (Image: S. Goldfarb, ATLAS Collaboration © 2019 CERN)</div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-11" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-11/file?size=large" /></a><figcaption>Kiley Kennedy asking ATLAS to smile. (Image: S. Goldfarb / ATLAS Experiment, CERN)</figcaption></figure> <p>This past week, I grabbed a last-minute opportunity to wander about and take in the beauty of my favourite particle physics detector. Located 100 meters under the French/Swiss border near Geneva, ATLAS is always a marvel to see and to explore. Although I have hosted hundreds of visits by its side, I never tire of the view and inevitably pull out my phone or camera to photograph it, yet again.</p> <p>On this occasion, I was joined by my colleague, Kiley Kennedy, a Ph.D. student at Columbia University in New York. She and I were on hand to host an interview by the Lithuanian television station <a href="http://www.delfi.lt/">DELFI Lietuva</a>. The hostess, Goda Raibytė, visited <a href="http://home.cern/">CERN</a> several years ago, and has stayed in contact ever since. Kiley and I took turns answering questions about the progress the experiment has made over the past few years, the upgrades we are currently undertaking during our long shutdown, and what we hope to discover when the next run starts in May, 2021.</p> <p><strong>Note</strong>: <a href="//www.delfi.lt/video/laidos/radikalus-smalsumas/radikalus-smalsumas-is-ko-mes-sudaryti.d?id=83325165">Here</a> is Kiley and Steve's interview with Goda Raibytė on Lithuania's <a href="http://www.delfi.lt/">DELFI Lietuva</a> (published 22 Jan 2020). English audio follows the introduction.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3>Public engagement teaches Kiley to consolidate an understanding of her research, to see where it fits in the big picture and to hone her skills at communicating that message clearly.</h3> <hr class="divider"> <div class="narrow"> <p>As a seasoned veteran, I enjoy answering these questions, yet I still find it a challenge. Kiley and I had a responsibility to make sure our answers were clear to a lay audience. Even more important, was to convey the message that science, fundamental research and international collaboration are not only worth the investment, but essential to humanity. I think we managed. At the very least, the audience was treated to an exceptional view of the detector and Kiley’s remarkable enthusiasm for her research.</p> <figure class="cds-video" id="ATLAS-VIDEO-2019-005-001"><div><iframe allowfullscreen="true" frameborder="0" height="450" src="//cds.cern.ch/video/ATLAS-VIDEO-2019-005-001?showTitle=true" width="100%"></iframe></div> <figcaption>Video of ATLAS Side A Endcap scanning from feet of support structure up 100m to the top of the access shaft.<span> (Video: S. Goldfarb / ATLAS Experiment, CERN)</span></figcaption></figure> <p>As a student, Kiley’s focus is set clearly on her contributions to the Liquid Argon Calorimeter, the detector subsystem her group maintains, and the analysis of data for her thesis. Although helping me with the underground interview could be seen as “taking a break” from her responsibilities, it is actually one of the more important components of her training. Public engagement teaches Kiley to consolidate an understanding of her research, to see where it fits in the big picture and to hone her skills at communicating that message clearly. I hope she will feature these skills proudly on her CV and that future employers will appreciate these values when considering her for a position.</p> <p>This has not always been the case. Even as experiments have grown in size and geographical spread, scientists within those collaborations have had to work hard, not only to develop the tools and methods to support outreach, but also to convince their peers of its value. Today, I am very proud to work in a laboratory and on a collaboration that value these efforts and provide support for this vital work. Over time, our colleagues are recognizing education and public engagement to be not only a social obligation, but a strategic pillar of our field, raising awareness and support, and increasing global appreciation of science in society.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3>Scientific process, evidence-based decision-making and international collaboration are more vital now than ever before. If you have any doubts, just read the news.</h3> <hr class="divider"> <div class="narrow"> <p>In fact, as of today, six major particle physics experiments, CERN, and 26 countries provide support in the form of membership of the International Particle Physics Outreach Group (<a href="http://ippog.org/">IPPOG</a>). And that list is growing. With pending signatures of the High-Altitude Water Cherenkov Gamma-Ray Observatory (<a href="http://www.hawc-observatory.org/">HAWC</a>) in Mexico and the Helmholtz Centre for Heavy Ion Research (<a href="file:///gsi.de">GSI</a>) in Germany, IPPOG is spreading not only geographically, but also in scope, including astroparticle and nuclear physics alongside high-energy particle physics.</p> <p>Why does this excite me? Well, O.K. – full disclosure – I will begin my second term as chair of IPPOG in January. But, more importantly, this collaboration is building networks, programs and activities that reach a broad spectrum of audiences around the world. Is particle physics that critical to our planet? It’s hard to say, but the methods we use certainly are. Scientific process, evidence-based decision-making and international collaboration are more vital now than ever before. If you have any doubts, just read the news.</p> <p>Or don’t. I suggest your time would be better spent thumbing through the photos that Kiley and I took during our underground visit. We both ran around the detector like little kids, snapping pictures everywhere. It’s awesome to have a job that always inspires. Enjoy and Happy Holidays!</p> <p>Photos below taken by S. Goldfarb, copyright ATLAS Experiment © 2019 CERN.</p> <div class="owl-carousel owl-theme"> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-1"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-1" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-1/file?size=large" /></a> <figcaption>LHC beamline at entrance to ATLAS side C</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-2"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-2" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-2/file?size=large" /></a> <figcaption>Kiley Kennedy photographing LHC beamline</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-3"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-3" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-3/file?size=large" /></a> <figcaption>Kiley Kennedy posing next to LHC beamline</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-4"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-4" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-4/file?size=large" /></a> <figcaption>Kiley Kennedy getting ready to drive to CMS</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-5"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-5" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-5/file?size=large" /></a> <figcaption>The international collaboration of LHC magnet construction</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-6"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-6" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-6/file?size=large" /></a> <figcaption>Gas tubes</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-17"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-17" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-17/file?size=large" /></a> <figcaption>Cables</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-8"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-8" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-8/file?size=large" /></a> <figcaption>A peek under the ATLAS Experiment</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-9"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-9" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-9/file?size=large" /></a> <figcaption>Bolts</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-10"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-10" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-10/file?size=large" /></a> <figcaption>Electronics on the ATLAS Experiment</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-12"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-12" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-12/file?size=large" /></a> <figcaption>Sign in the ATLAS cavern</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-13"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-13" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-13/file?size=large" /></a> <figcaption>ATLAS Side A and access shaft</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-14"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-14" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-14/file?size=large" /></a> <figcaption>Muon Spectrometer drift tubes</figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="ATLAS-PHOTO-2019-043-15"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-15" title="View on CDS"><img alt="Updates,Students,Point 1 Site,Collaboration,Detectors,Outreach &amp; Education,Technology,Blogs,Cavern,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-043-15/file?size=large" /></a> <figcaption>Cold and cold running water</figcaption></figure> </div> </div> </div><div style="clear: both; height: 0;"></div> </div> Sun, 22 Dec 2019 10:07:00 +0000 Steven Goldfarb 6652 at https://atlas.cern New ATLAS members, welcome on board https://atlas.cern/updates/blog/new-atlas-members-welcome-board <span>New ATLAS members, welcome on board</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Wed, 09/18/2019 - 13:17</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/dimitrii-krasnopevtsev" hreflang="en">Dimitrii Krasnopevtsev</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/atlas-collaboration" hreflang="en">ATLAS Collaboration</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">Group photo of the ATLAS Induction Day participants, 3 June 2019. (Image: E. Oreshkina/ATLAS Collaboration)</div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><p>This summer was rich with events regularly organised by the ATLAS Early Career Scientists Board (ECSB): Induction Day, Career Q&amp;A and the Ice Cream event. The ECSB is a special advisory group dedicated to assisting the ATLAS Collaboration in building an environment where the full scientific potential of young scientists can be realised. It consists of seven early career scientists, representing various career levels, nationalities, genders and home institutions. I have been in the thick of things as a new member of the ECSB and had a lot of new experiences. Each event was full of fantastic people and brought to its participants tonnes of useful information.</p> <figure class="right mobile-float img-60"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-038-5" title="View on CDS"><img alt="Collaboration,Meetings,Working in ATLAS,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-038-5/file?size=large" /></a><figcaption>Speakers at the Career Q&amp;A Event, 6 June 2019. From left to right: Xingguo Li (ECSB member), Teresa Dova (Argentina), Lydia Fayard (France), Antonella de Santo (UK), Klaus Monig (Germany), Richard Hawkings (CERN) and Stephane Willocq (US, not pictured). (Image: E. Oreshkina/ATLAS Collaboration)</figcaption></figure> <p>The first of our summer events was Induction Day, held on 3 June. During each Induction Day, the leaders of the collaboration introduce various elements of the experiment and answer questions from new members, mostly Masters and PhD students. The meeting was opened by the ATLAS spokesperson Karl Jakobs, who gave an overview of the ATLAS experiment and its role in the LHC. Then, the discussion about the major ingredients of the experiment began. There were presentations about detector operations, the trigger system, data quality and acquisition, computing, and finally about physics analyses in ATLAS. Newcomers were also introduced to safety rules and the CERN Code of Conduct, not forgetting to give credit to the importance of science outreach in the collaboration. ECSB members shared their experiences in talks about “how to do a PhD in ATLAS” and “how to do an ATLAS analysis”. There was an additional invited talk which walked the students through the analysis of Top quark production. Discussions continued during the welcome drink.</p> <p>The second Career Q&amp;A event was organised on 6 June, following the results of a general survey of ATLAS members. Among the many interesting opinions gathered, this survey showed a discrepancy between the way that people at different career levels rank the skill priorities for the same position differently. This issue and others related to career were discussed by 50 young ATLAS members and invited experienced scientists from around the world who recruit annually for their universities.</p> <figure class="left mobile-float img-60"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2019-038-4" title="View on CDS"><img alt="Collaboration,Meetings,Working in ATLAS,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2019-038-4/file?size=large" /></a><figcaption>Participants at the Ice Cream event, 21 August 2019. (Image: E. Oreshkina/ATLAS Collaboration)</figcaption></figure> <p>The summer ended with free ice cream and discussions around neutrino physics on 21 August. Around 100 early-career scientists were able to take a break from their current projects, to broaden their scientific horizons and learn more about what is going on in related fields. The <a href="https://indico.cern.ch/event/838486">Ice Cream event</a> was organised, for the third time, in collaboration with young forums from all four large LHC experiments (ALICE, ATLAS, CMS and LHCb), and was opened this year by the CERN Director for Research and Computing, Eckhard Elsen. Previous editions covered such topics as future colliders, dark matter and dark energy. For me, this was perhaps the most memorable event, as I received the honorable role of presenting the speakers, which I had never done before at such a large event. It is hard to imagine where I would have gained such experience had I not decided to join the ATLAS ECSB a year ago.</p> <p>Once again, I found out how an active position opens up new opportunities, provides you with new knowledge and helps you to grow. If you are a member of the ATLAS collaboration, I strongly encourage you to take part in the next ECSB event. The knowledge shared at these events could save you plenty of time and might even change your career. All events are broadcast online, so there are no more excuses if you cannot be at CERN in person. The next edition of the <a href="https://indico.cern.ch/event/831761">Induction Day</a> (link internal) will take place on 21 October and we are waiting for all new members to facilitate their integration into the ATLAS family.</p> </div> Wed, 18 Sep 2019 11:17:00 +0000 Steven Goldfarb 6648 at https://atlas.cern Ten days of Trigger and Data Acquisition at ISOTDAQ https://atlas.cern/updates/blog/ten-days-trigger-and-data-acquisition-isotdaq <span>Ten days of Trigger and Data Acquisition at ISOTDAQ </span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Fri, 04/26/2019 - 19:54</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/adam-abed-abud" hreflang="en">Adam Abed Abud</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/trigger-daq" hreflang="en">trigger daq</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class=""><img alt="" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/Picture2-ISOTDAQ.png" /><figcaption>Hands-on laboratory session: controlling a robotic arm. (Image: ISOTDAQ 2019)</figcaption></figure> <p>This April marked the 10th anniversary of the <a href="https://indico.cern.ch/event/739424/">International School of Trigger and Data Acquisition</a> (ISOTDAQ). It was a fantastic event that united researchers in physics, computing and engineering, ranging from undergraduate students to post-doctoral scientists. The goal of the school was to teach the "arts and crafts" of triggering and data-acquisition for high-energy physics experiments through a series of lectures and hands-on laboratory exercises.</p> <p>The trigger and data-acquisition system is a critical component of any nuclear and particle physics experiment. The scope of the trigger is to select only the interesting collision events among the billions produced in an experiment. Meanwhile, the data-acquisition system is responsible for collecting the data produced by the detectors, aggregating the events and storing for further analysis. This has to be done (almost) in real time!</p> <p>This edition of ISOTDAQ was held in the Physics and Electrical Engineering Buildings at Royal Holloway, University of London. The university campus was one of the best I have ever seen. It is located just outside the city of London, in a green and modern area. It was amazing to walk there in the morning, passing through a small park with plenty of squirrels, or to discover one of the many routes to get from one building to another. This year, the school attracted 55 students from all over the world! The atmosphere was always relaxed and friendly, suitable for learning the very technical topics presented.</p> <p>Data-acquisition is a really interesting subject because it is an amalgam of many different fields. It combines a lot computer science, electronics and physics. In other words: it is the best career path for tech nerds. The emphasis of the school was to understand the main building blocks of a general data-acquisition system, ranging from detector readout and software programming to intelligent triggering solutions.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">The life of a scientist can be really tough at times. But through conferences and schools like ISOTDAQ, one can enjoy some of the advantages of doing research.</h3> <hr class="divider"> <div class="narrow"> <figure class="right mobile-float img-50"><img alt="" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/Picture1-ISOTDAQ.png" /><figcaption>Main building at the Royal Holloway campus, University of London. (Image by A. Abed Abud/ATLAS Collaboration)</figcaption></figure> <p>A lot of focus was given to the most recent technological solutions, both in the lectures as well as the laboratory exercises. It was a perfect mix of theory and practice. During the hands-on sessions, we set up discriminators, scintillators and analogue-to-digital converters. This helped get us familiar with the basic elements of a typical high-energy physics experiment. Other interesting laboratory exercises included measuring the acceleration of gravity with an Arduino board and learning how to control a robotic arm with the Labview software.</p> <p>As in every conference, there were also plenty of opportunities to socialize. The coffee breaks presented great occasions to talk to experts in the field and, most importantly, it was the best way to get out of the freezing cold lecture hall! Between one cookie and another this was a great time to network, make new friends or simply enjoy British tea. After a day of sessions, we had the chance to visit local restaurants and pubs - where I discovered some amazing beers I had never heard of. The main social dinner for the conference (or should I call it “Royal Dinner”) was held in the Picture Gallery of the university. It definitely felt like being at Hogwarts, in a room full of historical paintings and interesting art.</p> <p>The life of a scientist can be really tough at times. But through conferences and schools like ISOTDAQ, one can enjoy some of the advantages of doing research: travelling, meeting new people, talking to experts and learning new skills. Through these experiences, we are able to advance our understanding of the complicated field of data-acquisition. It was definitely a rewarding experience and I’m looking forward to my next adventure as an ATLAS scientist!</p> </div><div style="clear: both; height: 0;"></div> </div> Fri, 26 Apr 2019 17:54:00 +0000 Steven Goldfarb 6634 at https://atlas.cern Boosting high-energy physics education around the world with ATLAS Open Data https://atlas.cern/updates/blog/HEP-education-worldwide-with-atlas-open-data <span>Boosting high-energy physics education around the world with ATLAS Open Data</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Thu, 07/26/2018 - 15:37</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/arturo-sanchez-pineda" hreflang="en">Arturo Sánchez Pineda</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/open-data" hreflang="en">Open Data</a></div> <div class="field--item"><a href="/tags/education" hreflang="en">Education</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><figure class=""><img alt="" src="https://atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/field/image/P9260742.JPG" /><figcaption>Arturo at an ATLAS Open Data-centred educational event in Venezuela. (Image: ATLAS Collaboration/CERN)</figcaption></figure> <p>Since the beginning of ATLAS, collaboration members have devoted hours, days, weeks and months teaching High Energy Physics (HEP) to anyone willing to listen. But sometimes those willing to listen do not have the means, especially when oceans and continents separate them from our experiment in Geneva. How can we overcome these geographical distances to allow anyone interested in HEP to learn?</p> <p>I work on the <a href="http://opendata.atlas.cern/">ATLAS Open Data project</a>, which has created a means for anyone, anywhere to learn about and work with HEP data. This project delivers data recorded by the ATLAS experiment, together with useful simulated data. Along with these datasets, we released several educational resources, documentation and support, plus analysis software that relies on other very well-known Open Source projects like <a href="https://root.cern.ch/">ROOT</a> at CERN.</p> <p>The fact that the ATLAS Open Data project’s data samples and resources are Open Access allows for their reuse – and enhancement – by non-members. A group of professors and students in Venezuela have taken advantage of this opportunity to create a formal learning environment with ATLAS Open Data resources.</p> <h3><strong>Two case studies: studying HEP in Venezuela</strong></h3> <p>Several Venezuelan universities now use the ATLAS Open Data resources to teach and to develop HEP university theses. This is happening at both the undergraduate and graduate levels.</p> <figure class="right mobile-float img-50"><img alt="" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/Iskya.jpg" /><figcaption>Iskya Garcia. (Image: ATLAS Collaboration/CERN)</figcaption></figure> <p>Iskya Garcia, a graduate student of Universidad Central de Venezuela (UCV), had experience working with large collaborations and datasets before working with ATLAS Open Data. During her undergraduate years at UCV, Iskya wrote a thesis based on data from the Latin American Giant Observatory (<a href="http://lagoproject.org/">LAGO</a>) collaboration at the Pierre Auger Observatory located in Argentina. When she started her master’s program at UCV under my supervision, Iskya used data from the ATLAS Open Data repository, which was collected in 2012.</p> <p>“The main subject was the development of cut-and-count analyses for the search of dark matter candidates using reconstructed jets of particles,” Iskya explained. “These are produced due to the presence of quarks and gluons after the proton-proton collisions at the LHC.”</p> <p>Iskya simulated other dark matter candidates using open sources HEP software like <a href="http://home.thep.lu.se/Pythia/">Pythia</a> and <a href="https://cp3.irmp.ucl.ac.be/projects/delphes">Delphes</a>. Before her thesis defense, Iskya moved to Argentina to develop her professional activities. But thanks to the wonders of modern communication, Iskya was able to present her thesis from Argentina, while the jury qualifier was in Caracas and her supervisor in Geneva.</p> <figure class="left mobile-float img-50"><img alt="" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/maria.jpg" /><figcaption>Maria Di Domenico. (Image: ATLAS Collaboration/CERN)</figcaption></figure> <p>Another student at UCV, Maria Di Domenico, did her undergraduate thesis in physics using the ATLAS Open Data resources. "In my thesis, I studied and produced a set of analyses with the end of reconstructing the invariant masses of the W, Z and Higgs bosons,” Maria said. “My work was performed using a cloud computing platform called <a href="https://swan.web.cern.ch/">SWAN</a>, developed and localised at CERN, and based on <a href="http://jupyter.org/">Jupyter</a> notebooks (Open Source web-based technology) and ROOT. The final product: a set of self-explained notebooks showing the physics and the programming elements needed for this kind of “cut-and-count” reconstruction. These notebooks will be used as educational resources for university-level HEP teaching and outreach in the ATLAS Open Data portal.”</p> <p>Maria has since graduated from UCV and is now a CMS PhD candidate living in Pisa, Italy. Unlike Iskya, Maria, her supervisor, and her jury were all present at UCV for her thesis defence in October 2017.</p> <p>These two beautiful stories of collaboration and passion remind us of the importance of sharing knowledge and resources worldwide. We continue following this path of openness, already working with new students from around the world.</p> <p>We cannot conclude this story without sharing their final products: both <a href="http://cds.cern.ch/record/2293251">Maria</a>’s and <a href="http://cds.cern.ch/record/2291838">Iskya</a>'s thesis documents are available in the CERN Document Server, another Open Access publication platform hosted at CERN.</p> </div> Thu, 26 Jul 2018 13:37:00 +0000 Steven Goldfarb 6619 at https://atlas.cern International conferences: interesting physics & instant excitement https://atlas.cern/updates/blog/ichep2018-instant-excitement <span>International conferences: interesting physics &amp; instant excitement</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Tue, 07/10/2018 - 06:10</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/meirin-oan-evans" hreflang="en">Meirin Oan Evans</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/ichep2018-0" hreflang="en">ICHEP2018</a></div> <div class="field--item"><a href="/tags/ichep-0" hreflang="en">ICHEP</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class="right mobile-float img-40"><img alt="" src="https://atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/field/image/seoul_0.png" /><figcaption>Gyeongbokgung Palace, Seoul. (Image: M. O. Evans/ATLAS Collaboration)</figcaption></figure> <p>What a start it's been to my first conference! I was lucky enough to join the 39th International Conference on High Energy Physics (ICHEP), the biggest conference in High Energy Physics. About 1000 physicists are currently gathered in Seoul, presenting results from all across the field. Getting to visit South Korea plus hearing about cutting-edge physics sounded like a 5-star recipe to me!</p> <p>Since there's so much physics to get through, the first few days of ICHEP are split into "parallel sessions", each focusing on different areas. On Friday and Saturday there were "Education &amp; Outreach" sessions. These sessions were close to my heart as I got to present the "ATLAS Open Data Project", something I've been working on since the start of my Master's degree. Other outreach talks described Virtual Reality, live videos, social media, masterclasses, online courses, summer schools, festivals, shows… </p> <p>I've also attended several sessions on loads of cool physics, including top quarks and SUSY (she still seems to be hiding in the dark). I’m not sure I understood all of the content, but hey, we're all learning. It was also really nice to see sessions on “Technology Applications and Industrial Opportunities” and “Diversity and Inclusion” included alongside physics talks. In the poster session, it was amazing being able to approach the authors to ask questions face to face.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">Coffee breaks are a great chance to chat to anyone and everyone, which is worth doing since whoever you speak to is an expert in their respective field!</h3> <hr class="divider"> <div class="narrow"> <p>Talks invoke many a thoughtful conversation over hot beverages. (Unfortunately, no hot chocolate is available for those of us who still like to pretend they're children.) Coffee breaks are a great chance to chat to anyone and everyone, which is worth doing since whoever you speak to is an expert in their respective field! The organisers also did a really great job introducing us to local culture during these breaks, providing traditional teas and sweets, and showcasing traditional South Korean calligraphy, caricatures and dancing.</p> <p>Evenings provide a perfect opportunity to go out and explore the conference host city. Right outside the conference venue there’s a lively area containing South Korean restaurants and bars. This setting made it easy to carry interesting physics discussions into the night over food and drink. You really need to try South Korean food if you’re ever over here (spoiler: it’s delicious).</p> <p>Everything has been non-stop since the conference started, but it's been worth it and I wouldn't ask to have it any other way. Roll on the rest of the conference! </p> </div><div style="clear: both; height: 0;"></div> </div> Tue, 10 Jul 2018 04:10:00 +0000 Steven Goldfarb 6618 at https://atlas.cern Waiting for physics: Stable beams! https://atlas.cern/updates/blog/waiting-physics-stable-beams <span>Waiting for physics: Stable beams!</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Fri, 05/11/2018 - 16:17</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/riccardo-maria-bianchi" hreflang="en">Riccardo Maria Bianchi</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/detector-operation-0" hreflang="en">detector operation</a></div> <div class="field--item"><a href="/tags/stable-beam" hreflang="en">stable beam</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class="right mobile-float img-70"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2018-017-1" title="View on CDS"><img alt="Blogs,Outreach &amp; Education,Updates,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2018-017-1/file?size=large" /></a><figcaption>At 12:11 we have two beams at the right energy circulating in the LHC accelerator, as shown on the LHC live screen; but the “stable beams” flag is still red… (Image: CERN)</figcaption></figure> <p>Following the <a href="/updates/atlas-blog/waiting-physics-splashing-beams">first “beam splash” tests</a> in early-April, the ATLAS experiment awaited the next milestone on the road to data-taking: "stable beams". This is when the LHC proton beams are aligned, squeezed, focused and finally steered to collide head-to-head. It is an important test, as it allows us to verify that the collision mechanism is ready to take data that are good for physics studies.</p> <p>But when would we see them? Before trying to collide the beams, the LHC experts want to be sure that every single parameter of the beam is correct. As such, over a period of few days, many preparatory tests are run, the actual first “stable beams” run waiting for the green flags from each of them. Finally, on the evening of 16 April, I got an e-mail from one of the Data Preparation coordinators announcing stable beam collisions for the following morning.</p> <h3><strong>Ready. Steady. Go!</strong></h3> <p>The Data Prep team is responsible for the correct reconstruction and packaging of the experimental data selected by the <a href="/discover/detector/trigger-daq">data acquisition system</a>, and has tools to quickly look inside the incoming data. Data Prep experts are able to quickly select the data coming from a given collision range; moreover, they can pick events which show interesting features: for example, a muon candidate, or two high-energy jets, or whatever else that can show that everything works fine and the collisions between the protons succeeded. As soon as they spot an interesting event, they prepare a data file containing all the details of that event and they pass it to the Visualization team.</p> <p>As “stable beams” collisions had been announced “during the morning”, I wanted to arrive at work early enough to prepare everything before the data started flowing in. When I’m involved in data-taking activity, I am usually in the <a href="/tags/control-room">control room</a> of the experiment, close to the iconic <a href="https://visit.cern/globe">CERN Globe of Innovation</a>. This time, instead, I wanted to be in my office, as the <a href="https://atlas-vp1.web.cern.ch/atlas-vp1/home/">visualization software I wanted to use</a> (which I developed for ATLAS with a small team of people), needs a specific setup and a quite powerful computer to be run smoothly. Thus, working in the control room on my laptop was not an option.</p> <p>Most of the pieces of <a href="/discover/detector/software-computing">software used in the ATLAS experiment</a> are custom made, because the needs and requirements of an experiment like ATLAS are so specific no commercial software will do. The ATLAS experiment itself is a giant prototype; consequently, the software running it and taking care of its data has to be developed from scratch.</p> <p>I took the tram from downtown Geneva early that morning, passing by the main cafeteria for coffee and a croissant, before arriving at my office on the first floor of <a href="http://voisins.cern/en/meyrin-site-point-1">Building 40</a>. It was 7:30 a.m. so the building was unusually silent. I switched on my machines and started setting up all the needed software environments. While that worked, I exchanged e-mails with the control room shifters on a second screen, discussing the details of the morning work plan of the accelerator. All the while I kept my eye on the <a href="https://op-webtools.web.cern.ch/vistar/vistars.php">LHC live screen</a>, checking the status of the beams in the accelerator and not to miss the collision moment. This live screen – which is public and I encourage <a href="https://op-webtools.web.cern.ch/vistar/vistars.php">you to look at</a> – allows us to follow the filling, acceleration, squeezing and focusing of the beams, as well as many other parameters of the LHC.</p> <p>LHC experts ran additional tests all morning. Around 12:00 p.m., we finally had two proton beams circulating in the LHC at the right energy. The first “stable beams” collisions of the year were approaching…</p> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2018-017-2" title="View on CDS"><img alt="Blogs,Outreach &amp; Education,Updates,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2018-017-2/file?size=large" /></a><figcaption>While waiting for the “stable beams” events, I explored our earlier experimental data with the latest version of the “VP1” tool. I accessed “collections” of data and applied different selection criteria, to check that all pieces of software and the workflow worked fine and smoothly. This way, I was sure to be ready to quickly and correctly visualize the upcoming data. (Image: R.M. Bianchi/ATLAS Collaboration)</figcaption></figure> <h3><strong>Creating an event display</strong></h3> <p>In order to be sure to have everything ready when needed, I had started visualizing data taken during the earlier test runs an hour before. They were not as interesting as the new ones would be, but they were useful to test the tools and to prepare some configuration files, ready to be used to quickly setup our visualization software when the interesting data would come.</p> <p>Our experimental data are stored in a custom format, which gathers bits of related information under a common name in a common container. This is called a “collection”, and we have “collections” of energy deposits, particle tracks, particle energies and so forth. Thus, I started accessing different collections in the data files, as shown in the above picture, to see if everything was in order with the newest release of our software and with its interaction with the experiment’s software framework. Then I applied several selection criteria to the data, to cut the clutter and emphasize the interesting content. After that, I tried different visualization settings to build different possible interesting views for the upcoming data.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">As soon as we receive the new data, we start working hard on it. Our task is to inspect the physics objects in the event (electrons, muons, photons, etc.) to visually verify that everything is correctly measured and reconstructed.</h3> <hr class="divider"> <div class="narrow"> <p>While I was testing all that, I received an e-mail from the Data Preparation coordinators: “Stable Beams!”.</p> <p>After a few minutes, another e-mail came, with the path of a data file containing the first 100 events of collision data, and a list of about 10 events that Data Prep experts flagged as “potentially interesting”.</p> <p>There were two <em>Data Visualization</em> teams on duty: me, using the VP1 3D event display, which can access and visualize all kinds of ATLAS data; and a couple of people using Atlantis, a fast 2D application, mostly used to visualize final filtered data. As soon as we received the new data, we started working hard on it. Our task is to inspect the physics objects in the event (electrons, muons, photons, etc.) to visually verify that everything is correctly measured and reconstructed, and that the event is meaningful. Sometimes, we have to quickly prepare appealing images for the press releases that CERN publishes; in this case, we needed images for an update that afternoon.</p> <p>Over the course of an hour, e-mails carrying nice images of interesting events and technical comments were sent back and forth between experts at the ATLAS control room, Building 40, and institutes and universities around the world. One of those interesting events is shown here below, featuring three particle-jets (the yellow cones), which lets us verify that both the detectors used to measure the energy deposits in the <a href="http://atlas.cern/discover/detector/calorimeter">calorimeters</a>, and the algorithms used to manage and interpret their data worked correctly. At the end of a fast-paced selection process, we had two interesting events, verified and visualized, which were ready to be approved.</p> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2018-015-1" title="View on CDS"><img alt="Event Displays,Physics,ATLAS,13 TeV" src="//cds.cern.ch/images/ATLAS-PHOTO-2018-015-1/file?size=large" /></a><figcaption>An interesting event featuring three particle-jets, produced by the interaction of the two beams of protons in one of the very first “stable beams” collisions of 2018. The three jets (yellow cones) are identified by a group of charged tracks (orange lines) and by energy deposits in the electromagnetic and hadronic calorimeters (green and yellow boxes, respectively). By analysing events like this, we can verify that the different parts that compose the ATLAS experiment are behaving correctly. (Image: ATLAS Collaboration/CERN)</figcaption></figure> <p>Everything released publicly must be approved by the ATLAS Management. Usually, especially for results concerning observations of physics phenomena or precise measurements, the approval takes a lot of time, involving a long process of several steps, where many experts check different aspects and the physicists who are part of the ATLAS collaboration can comment and ask for clarifications. But for event displays, especially those used for public communication, we have a fast-track approval process.</p> <p>After creating the images, we sent them to the ATLAS Deputy Spokesperson and some relevant experts. After some e-mail exchanges and checks of the measured data, to verify the correctness of the physics objects we were showing, the Deputy Spokesperson signed off and the ATLAS Collaboration released the first images of this year’s data.</p> <h3><strong>The data harvest begins</strong></h3> <p>Earlier this week, the ATLAS experiment started recording data that is “good for physics”. It is the start of a feverish period for the accelerator and the experiments, full of the expectations and the hopes of thousands of physicists around the world. We are all eager to analyse the upcoming data, searching for answers to the many still-open questions in particle physics. This is just the start of an exciting new year!</p> </div><div style="clear: both; height: 0;"></div> </div> Fri, 11 May 2018 14:17:00 +0000 Steven Goldfarb 6603 at https://atlas.cern Waiting for physics: Splashing beams https://atlas.cern/updates/blog/waiting-physics-splashing-beams <span>Waiting for physics: Splashing beams</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Thu, 05/10/2018 - 11:14</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/riccardo-maria-bianchi" hreflang="en">Riccardo Maria Bianchi</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/event-displays-0" hreflang="en">event displays</a></div> <div class="field--item"><a href="/tags/atlas-collaboration" hreflang="en">ATLAS Collaboration</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2018-012-1" title="View on CDS"><img alt="Event Displays,Physics,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2018-012-1/file?size=large" /></a><figcaption>A visualization of real data taken during the “beam splash” on the 6th of April 2018; the image shows the measurements performed by all the inner and central detectors which compose the huge ATLAS experiment, while the particles produced at the interaction point travel along the beamline from left to right, passing through the different pieces of ATLAS. (Image: ATLAS Collaboration/CERN)</figcaption></figure> <p>Each year, around mid-spring, the giant LHC accelerator wakes up from its winter maintenance and gets ready for a new feverish period of data taking. But before smashing protons once again, some tests have to be done, to check that everything is in order and that the machine can accelerate and collide particles properly, as it did before the shutdown.</p> <p>Among the many tests run by the LHC experts, two of them are major milestones for the experiments: the so-called “beam splash” and “stable beams” tests. These tests are the first observations of particle collisions after the restart, and are used by the experiments to check that all instruments, workflows, machines and pieces of software run as expected. </p> <p>The dates of all the tests are not precisely scheduled in advance: the broad period of the LHC restart is planned, but the exact date and time of a given test really depends on the outcome of many other tests performed in the preparatory phases preceding it. When the LHC experts are confident that everything is in order, they let the experiment operators know about the imminent start. And that moment can be any time: during the weekend, or in the middle of the night. When that times approaches, all the experiments are in an "alarm" state, ready to take any bit of data coming out from the collisions in the LHC. WE don't want to miss any of the precious data coming out from it!</p> <p>When “beam splash” and “stable beams” tests are announced, all the people at ATLAS who are involved in data-taking activities – such as data acquisition, detector control, data preparation and data visualization – are “on duty”. </p> <p>I am currently part of the data visualization group. We develop the visualization software that converts data, measurements and numbers into useful – and good looking – images called “event displays”. In particular, I am the lead developer and the maintainer of <a href="https://atlas-vp1.web.cern.ch/atlas-vp1/home/">VP1, the 3D event display of the ATLAS experiment</a>, which is the software used to produce the image accompanying this story.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">The image is not a simulation: it is a visual render of real data, a representation of the measurements taken by some of the detectors which compose the huge and complex ATLAS experiment.</h3> <hr class="divider"> <div class="narrow"> <p>We created our first event display from 2018 data on 6 April, for ATLAS’ successful “<a href="https://atlas.cern/updates/atlas-news/splashes-synchronization">beam splash</a>” test. During “beam splashes”, the accelerated beams are steered toward a collimator upstream of the detector, making them interact and creating a huge “splash” of particles. The ATLAS experiment worked very well, as shown in the image, where we can observe the visualisation of the energy deposited in the central detectors by the many particles produced in the “splash”. The image is not a simulation: it is a visual render of real data, a representation of the measurements taken by some of the detectors which compose the huge and complex ATLAS experiment. </p> <p>During a “beam splash”, the protons accelerated by the LHC hit a fixed target placed on the beamline before the detector, and the particles created in the interaction move on, along the beamline and outwards. They pass through layers of particle detectors, <a href="http://home.cern/about/how-detector-works">interact with them</a> and leave some amount of their energy. This is visualised in the picture as: red/white stripes in the inner layers (here showing the interaction with the TRT, which is part of the <a href="http://atlas.cern/discover/detector/inner-detector">Inner Tracking detectors</a>); green boxes in the<a href="http://atlas.cern/discover/detector/calorimeter"> LAr electromagnetic calorimeter</a>, which is especially built to interact with electrons and photons; and as yellow boxes in the <a href="http://atlas.cern/discover/detector/calorimeter">TileCal hadronic calorimeter</a>, conceived to detect hadrons (particles made of quarks: protons, pions, and so forth). From the image, you can notice that there seems to be more activity in the part of the detector closer to you, on the right; this is a peculiarity of the “beam splashes”: from the fixed target, the particles created in the interaction move like a big, advancing, and enlarging cone, hitting more and more layers of ATLAS as it moves from the left to right of the image. By looking at images like the one above, we can check that all the sub-detectors are working well, and can verify the correct data taking. This is an important step in testing the whole data workflow, in anticipation of “stable beams”.</p> <p>To hear about our work during the “stable beams” run, read my next post!</p> </div><div style="clear: both; height: 0;"></div> </div> Thu, 10 May 2018 09:14:00 +0000 Steven Goldfarb 6602 at https://atlas.cern Angels and Teachers https://atlas.cern/updates/blog/angels-and-teachers <span>Angels and Teachers</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Tue, 03/27/2018 - 16:09</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-subtitle field--type-text field--label-hidden field--item">How Boyle Heights is building bridges to the future</div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/steven-goldfarb" hreflang="en">Steven Goldfarb</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/education" hreflang="en">Education</a></div> <div class="field--item"><a href="/tags/outreach" hreflang="en">Outreach</a></div> <div class="field--item"><a href="/tags/communication-0" hreflang="en">Communication</a></div> <div class="field--item"><a href="/tags/stem-0" hreflang="en">STEM</a></div> <div class="field--item"><a href="/tags/steam-0" hreflang="en">STEAM</a></div> <div class="field--item"><a href="/tags/iamangel-0" hreflang="en">i.am.Angel</a></div> <div class="field--item"><a href="/tags/ippog-0" hreflang="en">IPPOG</a></div> <div class="field--item"><a href="/tags/quarknet-0" hreflang="en">Quarknet</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">Will.i.am surrounded by the robotics team at Theodore Roosevelt High School in Boyle Heights, CA, USA. Photo by Ciro Cesar / La Opinión, 2012.</div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class="center mobile-float img-100"><img alt="Will.i.am and Robotics Team" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/pictures/iamangel-foundation.jpg" /><figcaption>Will.i.am surrounded by the robotics team at Theodore Roosevelt High School in Boyle Heights, CA, USA. Photo by Ciro Cesar / La Opinión © 2012.</figcaption></figure> <p>I met beautiful people in Los Angeles earlier this month: smart, talented students, all destined for great careers. They welcomed me to their high schools and their after-school programmes, all well-equipped with computing, electronics, a robotics lab and, above all, a brilliant staff of teachers.</p> <p>The schools and labs were in a neighbourhood called Boyle Heights. Unlike more renowned locations in Los Angeles, Boyle Heights is not the home of swimming pools and movie stars. In fact, nine years back, these programmes did not exist, and the odds of any of these students making it to university were very low. It took some “angels” to make the difference.</p> <p>One of these angels is William Adams Jr, best known as American musician, producer, and actor, will.i.am. I met will.i.am in 2013 during an underground visit to the ATLAS detector. As I guided the visit, our discussion turned to outreach, education and the importance of helping young students from under-represented communities get a chance to do science. He shared his own love of research, and his regrets that it was difficult to pursue this passion in Boyle Heights, where he grew up. While I doubt will.i.am laments the stellar path his life has taken, I do wonder what his energy and curiosity would have brought to our field. Perhaps his philanthropic efforts give us a glimpse of just that.</p> <figure class="left mobile-float img-60"><img alt="Author visiting i.am.College Track" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/iamsteve.jpg" /><figcaption>The author speaking with students in the i.am.College Track programme in Boyle Heights, CA, USA. Photo by Shane Wood © 2018.</figcaption></figure> <p>I decided to come to Boyle Heights to find out. There, I learned that will.i.am launched the i.am.Angel foundation in 2009, focusing on university preparation, scholarships and other opportunities in STEAM education. The i.am College Track component, which is based on a programme founded by Laurene Powell Jobs in San Francisco, provides social and academic support to students from their first year in high school through their last year in university. According to College Track, 98% of the students in the programme will be the first in their families to apply to university and 94% come from families living at or below the poverty line. Yet most will succeed, thanks to the tutoring, academic workshops and entrance exam preparation provided by the programme in their high school years, as well as the academic, mentoring and emotional support given to them in university.</p> <p>In addition to College Track, the i.am.Angel foundation supports the STEM Academy of Boyle Heights. This programme was the brainchild of science teachers in neighbouring Theodore Roosevelt High School who wanted to do something more for those students with the potential to excel. The i.am.angel foundation supports their robotics programme, which has rapidly achieved success on a national level.</div><div style="clear: both; height: 0;"></div> <hr class="divider"> <p>People with differing social, economic and cultural backgrounds bring new ideas, which allow us to attack problems in new ways. Although ATLAS benefits from broad international participation, we still have much to gain by reaching out to under-represented communities, such as Boyle Heights.</p> <hr class="divider"> <div class="narrow"> <p>My motivation to visit these programmes goes beyond curiosity. As a member of ATLAS, I know the value of diversity in scientific research. People with differing social, economic and cultural backgrounds bring new ideas, which allow us to attack problems in new ways. This can be critical especially for complex measurements: variation brings clarity. Although ATLAS benefits from broad international participation, we still have much to gain by reaching out to under-represented communities, such as Boyle Heights.</p> <figure class="right mobile-float img-60"><img alt="Pacific Ocean" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/pictures/iampacific.jpg" /><figcaption>The Pacific Ocean off Santa Monica Pier, Los Angeles, CA. Sometimes we need big bridges to span our differences, but the future looks bright and sunny for the students of the i.am.Angel foundation. Photo by Steven Goldfarb, ATLAS Collaboration © CERN 2018.</figcaption></figure> <p>I was joined on my visit by Shane Wood. Shane is a high school teacher and member of QuarkNet, a network of physics researchers and teachers who work together to inspire students with educational programmes, such as the IPPOG Physics Masterclasses. We spent time talking with students and teachers about particle physics research and opportunities with ATLAS, CERN and QuarkNet. Their enthusiasm was contagious, and talk quickly turned toward partnership.</p> <p>Our short-term goals are to associate these programmes to a nearby QuarkNet centre, thus providing a local, more permanent link to activities, such as Masterclasses, Virtual Visits and teacher training. In the coming years, we will try to bring these teachers and students into the U.S. Summer Student, Semester Abroad, or High School Teacher programmes at CERN. But, ultimately, we plan to see these students joining us as colleagues and as science advocates. We need their help and, thanks to the work of a few angels, I believe it is on the way.</p> <p>It was truly an honour to meet these modern angels – philanthropists and teachers who are working hard to create opportunities for their youth that the rest of us take for granted. Watching them tear down walls to build bridges, at least for a short time, helped me to ignore the daily tweets from those who would do the opposite. And I am confident that their good work will prevail. If there is one thing science teaches us, it is that the truth cannot hide. And the truth is, diversity and inclusiveness make us all stronger.</p> </div><div style="clear: both; height: 0;"></div> </div> Tue, 27 Mar 2018 14:09:00 +0000 Steven Goldfarb 6599 at https://atlas.cern Reaching out across cultures https://atlas.cern/updates/blog/reaching-out-across-cultures <span>Reaching out across cultures</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Fri, 01/05/2018 - 22:27</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-subtitle field--type-text field--label-hidden field--item">Projecting the art of Lakota cosmology and particle physics</div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/steven-goldfarb" hreflang="en">Steven Goldfarb</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/outreach" hreflang="en">Outreach</a></div> <div class="field--item"><a href="/tags/education" hreflang="en">Education</a></div> <div class="field--item"><a href="/tags/communication-0" hreflang="en">Communication</a></div> <div class="field--item"><a href="/tags/art-0" hreflang="en">Art</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">Images produced by the workshop participants projected on the walls of their newly built tipi.</div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <iframe height="400px" width="100%" src="//www.youtube.com/embed/GkDCG_d4zzo" frameborder="0" gesture="media" allow="encrypted-media" 0="allowfullscreen"></iframe> <p>This past Spring, I had the opportunity to travel to Taos, New Mexico, USA, to work with artist Agnes Chavez, on one of her “<a href="http://agneschavez.com/xtreeprojectother-works/projection-particles/">Projecting Particles</a>” workshops. Her innovative programme aims to develop STEM (Science, Technology, Engineering, Math) skills in students aged 8 and up, employing a mixture of science education and artistic expression. It is a winning combination for everyone involved.</p> <p>On ATLAS, we have the opportunity to contribute to a variety of tasks essential to running the experiment. These include detector and computing development, data analysis, and the communication of our results to other scientists and the public. Over the past several years, I have focused my efforts on public education, outreach, and communication, serving as our outreach coordinator, and currently as our public webmaster. I also chair a global network called the International Particle Physics Outreach Group (<a href="//ippog.org">IPPOG</a>), of which ATLAS is an active member.</p> <figure class="left mobile-float img-70"><img alt="Steve Tamayo" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/pictures/IMG_3760.JPG" /><figcaption>Cultural specialist Steve Tamayo discusses Lakota traditions and stories with students participating in the Taos workshop. Image: Agnes Chavez.</figcaption></figure> <p>As with other aspects of our experiment, contributing to outreach is not only essential to the success of the collaboration, it is also personally enriching, helping us to develop the skills needed to excel as scientists. We are tasked not only to explain complex physical phenomena, but also to examine and reaffirm the methods that have allowed humankind to build our wealth of knowledge. Given current anti-science rhetoric propagated by some key players in global politics, I personally take the challenge of clarifying the nature of scientific research very seriously.</p> <p>Programmes combining science and art are proving to be highly successful. The <a href="//arts.cern/home">Art@CERN</a> artist residency, for example, has grown in size and stature since its inception in 2012, and is recognized for broadening global exposure to particle physics concepts and research. The fruitful marriage of these two fields is not surprising. Artists and scientists share an overwhelming curiosity about our universe and an innate need to communicate our findings. It is only the methods of expression that truly vary. In the case of young children, artistic expression of new concepts can be more accessible than rigid mathematics.</p> <p>The <a href="//www.stemartslab.com/lakota-cosmology-meets-particle-physics-an-interdisciplinary-collaboration/">Taos workshop</a> brought an intriguing cross-cultural dimension to the table. Chavez invited cultural specialist, Steven Tamayo, to share customs and stories related to the cosmology of the Lakota people, a North American indigenous nation. Added to the mix were Shane Wood, a physics teacher and active member of <a href="//quarknet.org">QuarkNet</a> (a US teacher-researcher network), and local educator Megan Bowers. The two teachers implemented a hands-on programme describing basic concepts of particle physics, while Tamayo and I shared time talking to and playing games with the students, immersing them in two contrasting but complementary worlds of cosmology.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">We agreed there is a universal, human drive to make sense of the world we live in through mutual observation and agreement of facts that is independent of cultural assessment of meaning or belief.</h3> <hr class="divider"> <div class="narrow"> <figure class="right mobile-float img-70"><img alt="Workshop participants" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/pictures/IMG_3785.JPG" /><figcaption>The author describing concepts in particle physics with the Taos workshop participants. Image: Agnes Chavez.</figcaption></figure> <p>The three-day workshop culminated with student teams producing animations to describe, in their own way, what they had learned about the origins of our universe. As a spectacular bonus, this art was projected at night on the walls of a tipi they had built following the traditional methods of the Lakota. While the images speak for themselves, to me they illustrate a deep appreciation of the common quest by humanity to understand our cosmos.</p> <p>Following the workshop, I was privileged to participate in several round-table discussions hosted by Chavez, featuring Tamayo and <a href="//en.wikipedia.org/wiki/Gregory_Cajete">Greg Cajete</a>, a Tewa author and Director of Native American studies at the University of New Mexico. Cajete has published several books comparing and contrasting western and indigenous scientific methods, and it was a pleasure to have his insight.</p> <p>Much of the discussion, including inquiries from the audience, focused on the originality of the project and on the contrast of methods employed by the various cultures. There were questions of varying ethical constraints, of the objective vs. subjective nature of inquiry, of story-telling vs. peer-reviewed journals. Yet, throughout all, there was a common thread that tied differing cultures together: data. That is, we agreed there is a universal, human drive to make sense of the world we live in through mutual observation and agreement of facts that is independent of cultural assessment of meaning or belief.</p> <p>I find it reassuring, especially in this age of fast, frivolous communication, to know that there is a unifying appreciation of measurement that goes beyond geographical, political, and cultural borders. In my opinion, those of us involved in science education and outreach need to put a high priority on conveying this message, alongside our reports of scientific progress. If it is the natural inclination of youth around the globe to seek knowledge through experimentation, it is our job to give them the tools and encouragement they need to do just that. And that’s a job that gives me great pleasure.</p> </div><div style="clear: both; height: 0;"></div> </div> Fri, 05 Jan 2018 21:27:00 +0000 Steven Goldfarb 6592 at https://atlas.cern The art of physics https://atlas.cern/updates/blog/art-physics <span>The art of physics</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Wed, 10/04/2017 - 13:29</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/antonella-de-santo" hreflang="en">Antonella De Santo</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/art-0" hreflang="en">Art</a></div> <div class="field--item"><a href="/tags/outreach" hreflang="en">Outreach</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">&amp;quot;Visions of the Hadron Collider,&amp;quot; presented at the British Science Festival by the author, B. Fazi, and Semiconductor (R. Jarman, J. Gerhardt). Image: A. de Santo, ATLAS Collaboration</div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class="center mobile-float img-100"><img alt="Art of Physics - Image 1" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/Picture1_0.png" /><figcaption>"Visions of the Hadron Collider," presented at the British Science Festival by the author, B. Fazi, R. Jarman, and J. Gerhardt. (Image: A. de Santo/ATLAS)</figcaption></figure> <p style="margin-left:-14.2pt;">I have been doing some work with artists recently. Not that I’m planning a career change, you know: I just love to talk about my research to anyone who is prepared to listen, and lately it’s been with artists.</p> <figure class="right mobile-float img-50"><img alt="Brighton's Centre for Contemporary Art" src="//atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/Picture2_0.png" /><figcaption>Fabrica, Brighton’s Centre for Contemporary Art. (Image: A. de Santo/ATLAS)</figcaption></figure> <p style="margin-left: -14.2pt;">Ruth Jarman and Joe Gerhardt, aka <a href="http://arts.cern/semiconductor">Semiconductor</a>, are internationally renowned visual artists who in 2015 won the Collide@CERN Ars Electronica Award and spent a two-month residency at CERN. Like myself, they live in Brighton, which is also home to the University of Sussex, where I work. We were introduced by Sally Jane Norman, one of my non-science colleagues.</p> <p style="margin-left: -14.2pt;">Since our first meeting, Semiconductor and I have continued to explore ways in which to collaborate. This September, together with Beatrice Fazi (a philosopher), we organized an event for the 2017 British Science Festival, titled “<a href="https://www.britishsciencefestival.org/event/visions-of-the-large-hadron-collider/">Visions of the Hadron Collider</a>”. It was held at Fabrica, Brighton’s Centre for Contemporary Art, which is a former Regency church in the historic Brighton Lanes – not the typical venue for a physics talk! We were able to have a conversation with the audience on science, art and philosophy. The audience was a good mix of science and arts enthusiasts, with lots of insightful questions, and we had a good debate at the end. If you think you know what “raw data” means, think twice and then ask a philosopher!</p> <p style="margin-left:-14.2pt;">For us physicists, “raw data” is just an operational definition for the data as it comes out of the detector’s front-end electronics, before any further “data-crunching” happens. As it turns out, for some people the concept of “raw data” is a bit of an oxymoron, because, they explain, data always reaches the user when it’s already “half cooked” through some human manipulation. Well, I guess they must be right, but I was relieved to hear that Semiconductor’s understanding of raw data is not too different from mine. Phew!</p> <p style="margin-left:-14.2pt;">Preparation for this festival was quite different from, say, putting together slides for a conference talk. It certainly took me out of my comfort zone, but I feel the richer for it. I have discovered that scientists and artists can have a lot more in common than one would intuitively guess. I love art, nearly as much as I love science, but I am not an art expert. I know that my appreciation of art can sometimes be quite naïve, but that does not spoil my enjoyment of fine artworks. Science is the same. You can enjoy it without having to be a trained scientist. You may not understand each and every technical detail, but you can still be amazed by the wonders of the natural world. Science, like art, makes us more human.</p> </div><div style="clear: both; height: 0;"></div> </div> Wed, 04 Oct 2017 11:29:00 +0000 Steven Goldfarb 6585 at https://atlas.cern How to run a particle detector https://atlas.cern/updates/blog/how-run-particle-detector <span>How to run a particle detector</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Fri, 06/23/2017 - 17:45</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/karola-dette" hreflang="en">Karola Dette</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/detector-operation-0" hreflang="en">detector operation</a></div> <div class="field--item"><a href="/tags/control-room" hreflang="en">Control Room</a></div> <div class="field--item"><a href="/tags/career-0" hreflang="en">career</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="owl-carousel owl-theme"> <div class="item"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-21" title="View on CDS"><img alt="Collaboration,Event Displays,Physics,ATLAS,restartLHC" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-21/file?size=large" /></a><figcaption>(Image: ATLAS Collaboration)</figcaption></figure> </div> <div class="item"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-3" title="View on CDS"><img alt="Collaboration,Event Displays,Physics,ATLAS,restartLHC" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-3/file?size=large" /></a><figcaption>(Image: ATLAS Collaboration)</figcaption></figure> </div> <div class="item"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-10" title="View on CDS"><img alt="Collaboration,Event Displays,Physics,ATLAS,restartLHC" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-10/file?size=large" /></a><figcaption>(Image: ATLAS Collaboration)</figcaption></figure> </div> <div class="item"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-11" title="View on CDS"><img alt="Collaboration,Event Displays,Physics,ATLAS,restartLHC" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-11/file?size=large" /></a><figcaption>(Image: ATLAS Collaboration)</figcaption></figure> </div> <div class="item"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-5" title="View on CDS"><img alt="Collaboration,Event Displays,Physics,ATLAS,restartLHC" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-5/file?size=large" /></a><figcaption>(Image: ATLAS Collaboration)</figcaption></figure> </div> <div class="item"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-6" title="View on CDS"><img alt="Collaboration,Event Displays,Physics,ATLAS,restartLHC" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-6/file?size=large" /></a><figcaption>(Image: ATLAS Collaboration)</figcaption></figure> </div> <div class="item"> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-17" title="View on CDS"><img alt="Collaboration,Event Displays,Physics,ATLAS,restartLHC" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-011-17/file?size=large" /></a><figcaption>(Image: ATLAS Collaboration)</figcaption></figure> </div> </div> <div class="narrow"> <p>If you are interested in particle physics, you probably hear a lot about the huge amount of data that is recorded by experiments like ATLAS. But where does this data come from? Roughly speaking: first you have to plan, build and maintain an experiment and in the end you need people to analyse the data you’ve recorded. But what happens in between? What happens in the day-to-day life of people in the ATLAS control room, who are responsible for keeping all that great data coming?</p> <p>24 hours a day, 7 days a week, people are working at the ATLAS control room to keep the detector healthy and running. We have shifters who constantly check the subsystems of ATLAS, namely the tracking, calorimeter and muon systems. Then there are shifters who take care of the data recording itself, starting and stopping the data-taking, making sure we have the correct recording rates and monitoring the raw data that comes in. And then there is myself, acting as the shift leader.</p> <p>What does a shift leader do? Well, I’d say it is mainly talking to people. I am responsible for making sure that all the other shifters are communicating all the time to ensure that no problem goes unnoticed. If the data quality shifter sees any deviation from the expected output, she will inform me and we can follow up on what is causing this with the shifter of the affected subsystem or experts on call. This way we make sure that all the data we record is of highest quality and we don’t lose data that we could have recorded.</p> <p>That week, though, there were no stable beam collisions and therefore no “normal” data-taking going on, so what were we doing during a shift?</p> <p>When I started my shift at 3pm on 10 May 2017, the LHC was just ramping up its energy and ATLAS was already in data recording mode, ready to receive the first collisions in 2017. The first thing on your list as shift leader is to check if your crew is complete and, as you can see from the pictures of that day, we had our fair share of women working in the control room. </p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">24 hours a day, 7 days a week, people are working at the ATLAS control room to keep the detector healthy and running. </h3> <hr class="divider"> <div class="narrow"> <p>After checking that all systems were working faultlessly and that the recording settings were correct, we had to wait for the LHC to find the right beam position to provide collisions in ATLAS. Only half an hour after they started to fine-tune the beams, we had the first collisions of 2017! This is an important milestone for the whole community and you can easily see how excited everybody gets by events like this by looking at the reaction of the shift crew. Everybody got up to take pictures of the event displays, showing the particle tracks of those first collisions. It feels a bit as if you are six years old again, it’s your birthday and you just got an amazing gift.</p> <p>After the beams were dumped, the data-taking was stopped to give our experts time to do stand-alone work with their systems. During this time, the experts are able to do calibrations, update parts of the software or run tests to verify former updates. My job between beam fills is mainly to take care that everybody sticks to the given time schedule. But since there is no time-crucial data-taking going on, it is a bit more relaxed than during times where we have colliding beams in the LHC. Therefore, I sometimes use this time to inform the public about what is going on with the LHC and ATLAS via my <a href="https://twitter.com/particlefairy?lang=en">Twitter</a> and <a href="https://www.instagram.com/particlefairy/">Instagram</a> accounts.</p> <p>With the LHC once again providing collisions at full intensity, we will be able to record more and more data, giving analysts the ability to look deeper and deeper into the mysteries of nature. </p> </div><div style="clear: both; height: 0;"></div> </div> Fri, 23 Jun 2017 15:45:00 +0000 Steven Goldfarb 6569 at https://atlas.cern Something old, something new: perspective of LHCP2017 https://atlas.cern/updates/blog/something-old-something-new-perspective-lhcp2017 <span>Something old, something new: perspective of LHCP2017</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Wed, 06/07/2017 - 17:31</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/xin-shi" hreflang="en">Xin Shi</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/lhcp-0" hreflang="en">LHCP</a></div> <div class="field--item"><a href="/tags/conference-0" hreflang="en">conference</a></div> <div class="field--item"><a href="/tags/lhcp17-0" hreflang="en">LHCP17</a></div> <div class="field--item"><a href="/tags/world-0" hreflang="en">World</a></div> <div class="field--item"><a href="/tags/china-0" hreflang="en">china</a></div> <div class="field--item"><a href="/tags/shanghai-0" hreflang="en">Shanghai</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">View from the Oriental Pearl Tower, Shanghai. (Image: X. Shi/ATLAS Collaboration) </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class="right mobile-float img-50"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-014-1" title="View on CDS"><img alt="Blogs,Outreach &amp; Education,Updates,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-014-1/file?size=large" /></a><figcaption>The Oriental Pearl Tower, Shanghai. (Image: X. Shi/ATLAS Collaboration)</figcaption></figure> <p>More than 400 physicists from around the world visiting Shanghai to hear the latest LHC results, at the fifth annual <a href="https://atlas-public.web.cern.ch/tags/lhcp17">Large Hadron Collider Physics (LHCP17) conference</a>. It was a wonderful opportunity for Chinese particle physicists and students, who do not often have the chance to travel abroad! Even for me, although I have been working on the LHC for almost 10 years, this was still my first time attending such a high-level conference to hear the first-rate physics results from all four experiments at the Large Hadron Collider. </p> <p>Thanks to the organizer’s effort to arrange excursions during the conference in the metropolitan area of Shanghai, I enjoyed the trip to the Oriental Tower to view the city from a breathtaking altitude. No participant will forget the spectacular banquet cruise on the Huangpu river! It was amazing to enjoy the breeze on the river while seeing the city line in beautiful ‘night mode’. Overall, it was truly a great adventure, filled with science and art!</p> <p>Since the discovery of Higgs by ATLAS and CMS in 2012 – a huge success for the Standard Model of particle physics – people have been looking for new physics everywhere: from dark matter to supersymmetry, from rare decays to abnormal excesses. With the LHC’s increased center-of-mass energy of 13 TeV, as well as more advanced analysis techniques, new limits have been set to almost all of the frontiers of new physics searches. Although there are tantalizing hints, no new phenomenon or particles have been found yet.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h3 class="rtecenter">Particle physics has never been <em>just</em> about looking for new particles. Instead, it's about the laws of nature.</h3> <hr class="divider"> <div class="narrow"> <figure class="left mobile-float img-50"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2017-014-2" title="View on CDS"><img alt="Blogs,Outreach &amp; Education,Updates,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2017-014-2/file?size=large" /></a><figcaption>View of the Shanghai skyline from a cruise on the Huangpu river. (Image: X. Shi/ATLAS Collaboration)</figcaption></figure> <p>However, as Prof. Nima Arkani-Hammed mentioned during an inspiring panel discussion – which included a group of distinguished scientists, including Eckhard Elsen, Luciano Maiani and Yifang Wang – particle physics has never been just about looking for new particles. Instead, it's about the laws of nature, which include the interactions between the particles and their properties that build the foundation of the world. In that sense, we shouldn't be discouraged by null results from new particle searches. The High-Luminosity LHC will lead us to a new era of searches, not only due to its increased 14 TeV energy but because of the humongous amount of data expected. Just like going up to the highest level of a beautiful oriental tower, there is always something new to look for, always new scenery to amaze.</p> <p>As a member of the ATLAS Inner Tracker (ITk) Phase 2 upgrade project, I'm proud to hear that the ITk-Strip Technical Design Report is the first Phase 2 upgrade project approved by the LHCC! We are looking forward to building the foundation for the next round of upgrades to make the ATLAS detector capable of dealing with the LHC’s high-luminosity environment while still maintaining capacity. </p> <p>Overall, it was a great experience to have the LHCP conference in China for the first time. I’m looking forward to seeing more exciting physics results from LHC and more active contributions from China! </p> </div><div style="clear: both; height: 0;"></div> </div> Wed, 07 Jun 2017 15:31:00 +0000 Steven Goldfarb 6567 at https://atlas.cern Is there life after physics? https://atlas.cern/updates/blog/life-after-physics <span>Is there life after physics?</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Fri, 12/02/2016 - 18:31</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-subtitle field--type-text field--label-hidden field--item">Exploring the careers of physicists post-physics</div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/gautier-depambour" hreflang="en">Gautier Depambour</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/cern-0" hreflang="en">CERN</a></div> <div class="field--item"><a href="/tags/atlas-collaboration" hreflang="en">ATLAS Collaboration</a></div> <div class="field--item"><a href="/tags/career-0" hreflang="en">career</a></div> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="owl-carousel owl-theme"> <div class="item"> <figure class="cds-image" id="CERN-PHOTO-201611-303-13"><a href="//cds.cern.ch/images/CERN-PHOTO-201611-303-13" title="View on CDS"><img alt="alumni,Personalities and History of CERN" src="//cds.cern.ch/images/CERN-PHOTO-201611-303-13/file?size=large" /></a> <figcaption>Director-General Fabiola Gianotti opens the event.<span> (Image: CERN)</span></figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="CERN-PHOTO-201611-303-41"><a href="//cds.cern.ch/images/CERN-PHOTO-201611-303-41" title="View on CDS"><img alt="alumni,Personalities and History of CERN" src="//cds.cern.ch/images/CERN-PHOTO-201611-303-41/file?size=large" /></a> <figcaption>Speakers open a roundtable discussion with the attendees.<span> (Image: CERN)</span></figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="CERN-PHOTO-201611-303-83"><a href="//cds.cern.ch/images/CERN-PHOTO-201611-303-83" title="View on CDS"><img alt="alumni,Personalities and History of CERN" src="//cds.cern.ch/images/CERN-PHOTO-201611-303-83/file?size=large" /></a> <figcaption>Attendees ask questions during the event.<span> (Image: CERN)</span></figcaption></figure> </div> <div class="item"> <figure class="cds-image" id="CERN-PHOTO-201611-303-57"><a href="//cds.cern.ch/images/CERN-PHOTO-201611-303-57" title="View on CDS"><img alt="alumni,Personalities and History of CERN" src="//cds.cern.ch/images/CERN-PHOTO-201611-303-57/file?size=large" /></a> <figcaption>Discussions during the post-talk networking drink.<span> (Image: CERN)</span></figcaption></figure> </div> </div> <div class="narrow"> <p>Am I going to dedicate my entire life to high-energy physics? Am I qualified to work in another field, if I wish to? These are questions we may ask ourselves as we near the end of a contract. On Tuesday 29 November, the four experiments, ATLAS, ALICE, CMS and LHCb, organized a meeting with some of their former physicists who had decided to take the plunge into the business world. In a crowded Main Auditorium, they discussed, over the course of almost three hours, their new lives and what they considered to be the skills high-energy physicists can boast about after working in the field.</p> <p>The session started with a few words of introduction by Director-General Fabiola Gianotti, who highlighted the importance of this networking event, the aim of which was to help physicists find the best opportunities outside academia, to find the jobs that best fit their talents. Six former members of the four experiments gave presentations, and their talks were complemented by two roundtable discussions. The evening ended with a buffet, a good occasion to discuss freely with the speakers.</p> <p>Their profiles were varied, from someone who had “only” completed a PhD to one who worked for 20 years in the high-energy physics field. Each of them had transformed their careers in a different way, and in different fields: consulting, banking, patents, health or artificial intelligence, and in companies with various sizes, from start-ups to multi-national companies.</p> <figure class="right mobile-float img-70"><a href="//cds.cern.ch/images/CERN-PHOTO-201611-303-27" title="View on CDS"><img alt="alumni,Personalities and History of CERN" src="//cds.cern.ch/images/CERN-PHOTO-201611-303-27/file?size=large" /></a><figcaption>Former ATLAS member, Thibaut Mueller, presents at the LHC Experiment Career Networking event. (Image: CERN)</figcaption></figure> <p>Speaker Thibaut Mueller, for example, was part of the ATLAS collaboration between 2009 to 2014. His research was focused on supersymmetry and quantum gravity. From the age of 14, he had always wanted to be a physicist… until the day when he decided to change, and try something else. His career took him to McKinsey &amp; Company, a consulting firm where he became project manager in the Geneva office. His experience at CERN allowed him to emphasize his technical expertise, as well as his skills in data analysis and communication.</p> <p>During this career networking event, I sought to pick out what skills the speakers considered exceptional to people who have worked at the LHC experiments. I think it is possible to group these skills into three broad categories:</p> <ul> <li><strong>Strong technical abilities</strong> (for instance, in programming or in data science) and <strong>theoretical abilities</strong> (especially in quantum mechanics). To this, we can add the ability to learn quickly, which can be adapted to any discipline, but especially to fast-paced businesses where they frequently switch from one project to another.</li> <li><strong>Scientific discipline</strong> and <strong>capacity for analysis</strong> that allows us to understand, dissect and solve complex problems. In particular, being able to analyse, manipulate and synthesise data is evidence of structured and clear thinking, unchanged by superficial analyses and critical of data.</li> <li><strong>Communication skills</strong>, which are of crucial importance in the business world where it is necessary to interact with clients. Moreover, having experienced the international environment of CERN, is a great asset.</li> </ul> <p>If we remember only one thing from this meeting, it should be that, working for the ATLAS experiment, and having completed a PhD, looks great on a CV. Indeed, it is a proof that the person has the qualities listed above. Of course, we must remain humble and conscious that having a PhD is not a guarantee that we will immediately get the job we want; but, at least, it is a guarantee of being heard. </p> <p>According to the speakers, we should remain curious and open-minded, and be ready to learn. The business world is very demanding and often requires some skills that the research field does not develop. In addition, practise your skills like a concert pianist who regularly works on his pieces. Be able to define yourself precisely: are you a developer, or an expert in data analysis? And, last but not least, remain proud of yourself and ambitious. Don’t be afraid to embark on new adventures, even though you may meet failure. Also, don’t be too influenced by success stories, and be ready to tackle and solve problems.</p> <p>Choosing between work at CERN or in the business world may not always be your decision. But, whatever the case, this event showed that you can switch between the two with ease, if you are motivated! </p> </div><div style="clear: both; height: 0;"></div> </div> Fri, 02 Dec 2016 17:31:00 +0000 Steven Goldfarb 6550 at https://atlas.cern What happens when energy goes missing? https://atlas.cern/updates/blog/what-happens-when-energy-goes-missing <span>What happens when energy goes missing?</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Thu, 11/03/2016 - 17:05</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/julia-gonski" hreflang="en">Julia Gonski</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/combined-performance" hreflang="en">Combined Performance</a></div> <div class="field--item"><a href="/tags/missing-energy-0" hreflang="en">missing energy</a></div> <div class="field--item"><a href="/tags/jetm-group-0" hreflang="en">JETM group</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">An ATLAS event with two jets and a lot of missing energy. (Image: ATLAS Experiment/CERN) <br /> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <p>Here at ATLAS, we like to consider ourselves pretty decent at tracking down particles. In fact, we do it every day. Just because a proton-proton collision doesn’t produce the next Nobel Prize winning particle doesn’t mean we can ignore it. Teams of physicists are still combing through every single event, rebuilding known particles out of the signals they leave us.</p> <p>Unfortunately for us, some particles are tricky. They don’t leave any signal in the detector at all. Sure, these “invisible” particles could be something we already know about. But they could also be dark matter, one of the biggest mysteries in physics today. So physicists really want to be able to reconstruct these particles, and to do that, we have to be even trickier.</p> <figure class="left mobile-float img-60"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2016-026-1" title="View on CDS"><img alt="Blogs,Outreach &amp; Education,Updates,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2016-026-1/file?size=large" /></a><figcaption>Parton collisions, on a very large scale. (Image: Ryan Carlson/Brigham Young University)</figcaption></figure> <p>Imagine two billiard bills flying across a pool table and directly colliding with one another. That’s the sort of interaction we want from our protons at the LHC. Except protons are a bit more complicated. We know that each proton is made of quarks, which are fundamental particles, and gluons, which carry a force that holds the quarks together. All of these particles together carry the momentum of the proton as it is hurtling through the beam pipe. Physicists refer to anything in a proton that carries momentum as a <strong>parton. </strong>So, rather than just two billiard balls, we have a handful of billiard balls colliding with another handful. Things are going to start to get a little hectic. </p> <p>Our big question at ATLAS: what happens to these sets of billiard balls after they collide?</p> <p>Let’s look at one set of colliding partons individually. We know that each parton enters the collision with a certain amount of momentum entirely along the direction of travel. Once they collide, their interaction could produce a wide variety of other particles. Intuitively, in a head-on collision, it’s not likely that the new particles will keep their momentum along the initial direction; that’s what you would expect in a more glancing collision. Rather, the resulting particles will fly off perpendicular to the beamline, in what physicists call the <strong>transverse plane</strong>. So we have a scenario in which there is no initial momentum in the transverse plane, but there’s a lot of stuff in this plane after the collision. Flashback to physics class, where we’ll use the help of momentum conservation to figure this out. No matter how much stuff is in the transverse plane of the detector after the collision, <strong>it must all add back up to zero</strong>. In other words, the directions and magnitudes of the final state particles must cancel one another out. </p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h2>Our big question at ATLAS: what happens to these sets of billiard balls after they collide?</h2> <hr class="divider"> <div class="narrow"> <figure class="right mobile-float img-60"><a href="//cds.cern.ch/images/ATLAS-PHOTO-2016-026-2" title="View on CDS"><img alt="Blogs,Outreach &amp; Education,Updates,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2016-026-2/file?size=large" /></a><figcaption>Conservation of momentum illustrated in a parton collision. (Image: Tomo Lazovich/Harvard University)</figcaption></figure> <p>Now let’s think about this same idea, but back on the pool table. Two bunches of billiard balls collide with one another and go flying in different directions across the table. You do this a few times, and suddenly you see a collision after which every single ball flies off in the same direction. This would look pretty unnatural to you. You may <em>think </em>that you saw every ball that emerged from the collision, but their suspicious behavior would lead you to conclude that <em>something else</em> had to have flown across the table in the opposite direction. Now we have to shift back to the ATLAS detector, because while there are no ghost balls to produce this effect (depending on what sorts of billiards halls you go to), in particle physics it is very possible.</p> <p>The “ghosts” in our case are most often neutrinos. These are fundamental particles that simply don’t interact very often with matter, so they pass through our detector entirely unfazed. But they do carry off some momentum from the initial collision. We add up all of the particle vectors that we <em>can </em>see, and assign the neutrino whatever momentum we need to end up with zero. Take the event display shown here as an example. We can see the jets in the detector, so we add up those two vectors and draw the red line that perfectly balances the two blue ones. This red line is called the <strong>missing transverse energy</strong>, or MET, of the event.</p> <figure class=""><a href="//cds.cern.ch/images/ATLAS-PHOTO-2016-026-3" title="View on CDS"><img alt="Blogs,Outreach &amp; Education,Updates,ATLAS" src="//cds.cern.ch/images/ATLAS-PHOTO-2016-026-3/file?size=large" /></a><figcaption>How MET balances jets in the transverse plane. (Image: ATLAS Experiment/CERN)</figcaption></figure> <p>The interesting scenario here is that – just maybe – the ghost is something we haven’t observed yet. It could be dark matter, but it could also be a light supersymmetric particle or some other exotic thing we haven’t even dreamed up yet. In order to make sure nothing slips past us, we have to stay on top of missing energy and be very precise with its measurements. After all, the task of ATLAS is to push the frontiers of particle physics into the future, to advance hardware and technology, and to make the next groundbreaking discovery. But without sinking the eight-ball first. </p> </div><div style="clear: both; height: 0;"></div> </div> Thu, 03 Nov 2016 16:05:00 +0000 Steven Goldfarb 6549 at https://atlas.cern The many faces of research https://atlas.cern/updates/blog/many-faces-research <span>The many faces of research</span> <div class="field field--name-field-top-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Top HIghlight</b></div> <div class="field--item">False</div> </div> <span><span lang="" about="/user/2" typeof="schema:Person" property="schema:name" datatype="">Steven Goldfarb</span></span> <span>Mon, 10/17/2016 - 14:25</span> <div class="field field--name-field-highlight field--type-boolean field--label-inline"> <div class="field--label"><b>Highlight</b></div> <div class="field--item">False</div> </div> <div class="field field--name-field-update-category field--type-entity-reference field--label-hidden field--item"><a href="/blog" hreflang="en">Blog</a></div> <div class="field field--name-field-subtitle field--type-text field--label-hidden field--item">Exploring the career(s) of an ATLAS physicist</div> <div class="field field--name-field-author field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/authors/anja-vest" hreflang="en">Anja Vest</a></div> </div> <div class="field field--name-field-tags field--type-entity-reference field--label-hidden field--items"> <div class="field--item"><a href="/tags/atlas-collaboration" hreflang="en">ATLAS Collaboration</a></div> <div class="field--item"><a href="/tags/career-0" hreflang="en">career</a></div> </div> <div class="field field--name-field-image-caption field--type-string-long field--label-hidden field--item">Anja Vest (right) hosted virtual visits as part of the International Masterclass programme. In this photo, together with Andrée Robichaud-Véronneau (left), she reveals the &amp;quot;crack&amp;quot; in their LHC backdrop used during the visits. (Image: Konrad Jende/CERN)</div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><div class="narrow"> <figure class="right mobile-float img-60"><img alt="" src="https://atlas-public.web.cern.ch/sites/atlas-public.web.cern.ch/files/field/image/masterclass10_511.jpg" /><figcaption>Anja Vest (right) hosted virtual visits as part of the International Masterclass programme. In this photo, together with Andrée Robichaud-Véronneau (left), she reveals the "crack" in their LHC backdrop used during the visits. (Image: Konrad Jende/CERN)</figcaption></figure> <p>Ever since the age of 10, as far as I remember, I have been fascinated by technical and natural sciences, especially physics. I loved building (and repairing) experiments or things. As a result, in high school I happily attended an advanced course in physics and continued my studies at RWTH Aachen University (Germany).</p> <p>From 2001 to 2004, I worked at the <a href="http://h1.desy.de/">H1 Experiment</a>, a complex experiment taking data at the unique electron-proton collider HERA, hosted by <a href="http://www.desy.de/">DESY</a> (Deutsches Elektronen-Synchrotron) in Hamburg, Germany. I had a fellowship from the DFG (German Research Foundation), which allowed me to gain my doctorate in 2004.</p> <p>I then worked as a research associate at the University of Karlsruhe (now KIT). I was a member of the CMS collaboration, and I was responsible for the integration of the local computer cluster into the <a href="https://home.cern/about/computing/worldwide-lhc-computing-grid">LHC Computing Grid</a> (LCG). This was a major responsibility that also required the administration of the LCG grid site. </p> <p>After this first postdoc phase, I really wanted to know what different work environments look like. In particular, working in industry appeared to be very interesting and challenging for me. In 2006, I left for the semiconductor industry in Dresden, where I worked in the research and development department. I was responsible for technology and product qualification of semiconductor memory products, which meant planning, tracing, data analysis, assessment of reliability tests and development of new reliability test methods.</p> <p>In my experience, there are several differences between industry and academic research. Although the high amount of meetings was roughly the same, the day-to-day work was quite different. For example, in industry I was much less independent in my work structure; there were a lot more boundary conditions given by the projects I was involved in. Moreover, there were a lot more deadlines, much shorter than in academic research and often on short notice.<br /> <br /> And then, in 2009, the company I worked for declared bankruptcy. I was very lucky that, shortly afterwards, a 5-year position in particle physics was announced at the Technical University Dresden. I applied and got back to particle physics. It was then that I joined the ATLAS experiment, where my research activities focused on analyses of vector boson scattering processes.</p> </div><div style="clear: both; height: 0;"></div> <hr class="divider"> <h2>Returning to research is certainly unusual for physicists. Typically, going to industry is a one-way trip.</h2> <hr class="divider"> <div class="narrow"> <p>Returning to research is certainly unusual for physicists. Typically, going to industry is a one-way trip. However, working in a university environment was much more attractive for me than further working in industry. Although I knew this might be a risk, since had I "lost" more than three years of reputation (publications etc.), I ventured forward. Fortunately, the experience I gathered in my industry job was well received at the TU Dresden working group.</p> <p>At the end of 2011 my son Karl was born, and I was on maternity leave until August 2012. Having a child while working in High-Energy Physics is quite challenging: first because the workload is high and often there are exceptional meetings at very early or late times due to the globally spread working groups; and second because you keep travelling, to CERN, to different universities, to conferences… While I was based at CERN, from November 2012 to September 2014, my husband took paternity leave and took over the child care. Without the help of a flexible partner, having a child and working in academic research at this pace would hardly be possible.</p> <p>I had an excellent career in the ATLAS Experiment, where I was convenor of the “Standard Model Electroweak Working Group”, a member of the ATLAS Physics Office (working on the submission and tracking of the hundreds of publications of the ATLAS collaboration to the journals), and convenor of the ATLAS-Germany “Standard Model Working Group”.</p> <p>In September 2015, I became a Professor of Physics and Mathematics at Flensburg University of Applied Sciences (Germany). Here, I am teaching physics and mathematics to future engineers. Since teaching is the main focus of my new job it is a lot different than working at ATLAS: much less working group meetings, software programming, and conferences and much more contact with young students, which I like a lot. Once again, I made a switch: from pure particle physics back to the “basics” of physics.</p> <p>Having been part of the particle physics community was a really great experience, and it obviously also can open a window to untypical career paths. The beauty of such windows is that they can open in both directions.</p> </div><div style="clear: both; height: 0;"></div> </div> Mon, 17 Oct 2016 12:25:00 +0000 Steven Goldfarb 6548 at https://atlas.cern