Volume 390 - 40th International Conference on High Energy physics (ICHEP2020) - Parallel: Operation, Performance and Upgrade of Present Detectors
Irradiation and gas studies of Micromegas production chambers for the ATLAS New Small Wheel
L. Pezzotti
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Abstract
One of the main upgrades of the ATLAS Experiment at the Large Hadron Collider (LHC) during Long Shutdown 2 is the replacement of the current forward muon spectrometer inner stations with a new detector, the New Small Wheel (NSW), covering the pseudorapidity region $1.3 < \eta < 2.7$. Large area micromegas (micro mesh gaseous structure) detectors will be installed as part of the upgrade in order to cope with the high radiation environment expected from the Run 3 onwards while providing high resolution tracking capabilities. Such large micromegas detector size (up to $3$ m$^2$) will be employed for the first time in high energy physics experiments, thus posing new challenges in terms of high-voltage and current stability. Before the installation within the ATLAS Detector, micromegas chambers are tested under irradiation at the CERN Gamma Irradiation Facility (GIF++).
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