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T: Fachverband Teilchenphysik

T 105: Muon detectors

T 105.3: Vortrag

Freitag, 3. April 2020, 11:35–11:50, L-3.016

Gas Electron Multiplier Quality Control Tests and Performance Studies — •Shawn Zaleski, Thomas Hebbeker, Kerstin Hoepfner, Henning Keller, and Giovanni Mocellin — III. Physikalisches Institut A, RWTH Aachen University

The Compact Muon Solenoid (CMS), one of the primary experiments at the CERN LHC, will be upgraded to be able to record the higher event rates as well as deal with the related increased radiation doses expected during the next running of the LHC. The installation of the Gas Electron Multiplier (GEM) GE1/1 detector in the CMS muon station endcaps will be the first in a series of upgrades to better handle these higher rates. The hardware for the GE1/1 detector chambers are produced in seven countries throughout the world. The chambers are then qualified in a series of steps called quality checks (QCs). Several of the QC stages, in particular the tests for gas tightness, high voltage, and gas uniformity will be discussed.

GEMs are being employed in an increasing number of application areas, from university lab experiments to large scale experiments such as CMS. As such, the characteristics of a GEM with 10 cm x 10 cm active gas area has been studied for the purpose of integrating into the particle physics advanced undergraduate laboratory course at RWTH Aachen University. Aspects which can be studied are: chamber performance, impact of HV applied across an individual GEM foil on the gain and gas mixture.