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T: Fachverband Teilchenphysik

T 62: Myondetektoren

T 62.1: Gruppenbericht

Mittwoch, 21. März 2018, 16:30–16:50, Z6 - SR 2.002

CMS muon chambers - status and upgrade — Thomas Hebbeker, Carsten Heidemann, Kerstin Hoepfner, Markus Merschmeyer, and •Daniel Teyssier — III. Physikalisches Institut A, RWTH Aachen University

The CMS muon system uses three different technologies to trigger, identify muons and measure their momentum. Even after 10 years of operation the performance is very high. The Drift Tube (DT) chambers located in the barrel show a very good behavior and have a coverage up to η = 1.2. The Cathode Strip Chambers (CSC) are able to work in an inhomogeneous B field environment and cover the endcaps region up to η = 2.4. In addition the Resistive Plate Chambers (RPC) are present in both barrel and endcaps, in order to give a better time resolution. The living channels fraction for all these detectors is still very high at the end of 2017 and the redundancy of the system allows a very good muon identification efficiency.

The HL (High Lumi)-LHC program is challenging for the muon system, as it will compel to deal with new background and rate conditions. The electronics of all three DT, CSC and RPC systems will be modified. Some new Gas Electron Multiplier (GEM) and RPC detectors will be installed to extend the current coverage up to η = 2.8 and also to reinforce the redundancy in the forward region. Several tests of longevity are on-going to qualify the new components.

This talk will present the status of the current muon system and the capacity to improve and extend the system for HL-LHC.