Join CERN live on 15 July at 5 pm (CEST) for a trip 100 metres underground to the ATLAS experiment at the Large Hadron Collider (LHC).

Follow along as physicists begin to install a new detector – the New Small Wheel – in the ATLAS experiment. This 10-metre, 100-tonne detector is part of a massive upgrade of the ATLAS experiment that is underway in preparation for the High-Luminosity LHC. Find out how this new detector works, and how it will help ATLAS physicists reconstruct particle tracks emerging from LHC collisions. Scientists will be on hand to answer your questions.

This live production is part of a series charting the maintenance and upgrade of CERN’s accelerator complex throughout Long Shutdown 2 (LS2), which began at the end of 2018. Exploring CERN’s underground areas is only possible while upgrade work is ongoing, before beams of particles return to the machines. You can watch previous live recordings via this LS2 YouTube playlist and stay tuned for more live productions still to come.

Watch live on Thursday 15 July at 5 pm (CEST) via CERN's YouTube and Facebook channels. There will also be an Instagram live for questions and answers taking place just after this event.