The DLNP Group of Scientific Communication visited Section 3 of Proton−Antiproton Interactions of the Experimental Department of Colliding Beams at DLNP.

This March, the Section will complete manufacturing Micromegas detectors for new small wheels (NSWs) of the muon spectrometer of the ATLAS experiment at the Large Hadron Collider (LHC) according to the LHC Phase 1 upgrade.

photo 2021 02 20 10 51 32Maria Pilipenko and Aleksi Gongadze

In 2018, the LHC was shut down for the planned upgrade. Spectrometer components are replaced, first of all those close to the proton beam interaction point. They are not designed for load growth resulted from the increase in collider luminosity and energy during the next run.

To launch mass production and to test the largest Micromegas detectors for the NSWs, a special site was equipped at DLNP, including two clean workrooms and testing areas. A total of all modules assembled and tested here will be 32 (+1 spare module).

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The DLNP Section is involved into the ATLAS detector upgrade not only through manufacturing and testing modules but also through their installation on the NSW structures at CERN, testing and commissioning.

Note that the second complete-cycle line for Micromegas detector production was launched and is successfully operating. It is not related to ATLAS and allows JINR employees to participate more efficiently in different physical experiments.

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Due to the COVID-19 pandemic, the LHC operation was stopped in spring, which affected the overall schedule. Now, the Section team is working hard not only to deliver detectors in time but also to commission the NSWs by December−January 2022. As soon as February 2022, the ATLAS experiment caverns will be closed and the collider startup preparation will get underway.

We thank the Head of the project at JINR Aleksi Gongadze for the tour and explanations.

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