Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 116: Detectors 11 (gas detectors)

T 116.4: Talk

Friday, March 8, 2024, 09:45–10:00, Geb. 30.23: 2/17

Upgrading the CMS muon end cap for the high luminosity LHC using GEM chambers — •Shawn Zaleski, Thomas Hebbeker, Kerstin Hoepfner, and Francesco Ivone — III. Physikalisches Institut, RWTH University, Aachen

The first set of gas electron multiplier (GEM) chambers was installed in the Compact Muon Solenoid (CMS) end cap of the muon system during long shutdown 2 (LS2) in 2021 and 2022. These GEM chambers comprise the so-called GE1/1 subsystem. The GE1/1 system compliments the cathode strip chamber (CSC) system in an effort to improve the transverse momentum measurement of muons traversing the CMS end caps. The GE1/1 system has been participating in data taking within CMS since the start of Run 3 in 2022. Several performance studies have been performed in this time and a procedure for certifying GEM data has been developed. Additional extensions to the GEM system are foreseen. These extensions will extend the measurement acceptance of the muon system in pseudorapidity from 2.4 to 2.8.

Keywords: GEM; CMS; muon