SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 149: Detector Systems / Muon

T 149.6: Vortrag

Donnerstag, 23. März 2023, 18:45–19:00, WIL/C133

Certification of sMDT chambers for the phase II upgrade of the ATLAS muon spectrometer — Oliver Kortner, Hubert Kroha, and •Nick Meier — MPI für Physik, München, Deutschland

For operation at the HL-LHC, the ATLAS experiments will upgrade the inner muon spectromater barrel layer with stations of thin-gap resistive plate chambers (RPCs) and small diameter muon drift-tube (sMDT) chambers in order to increase the acceptance of the first level muon trigger from current 80% to 95%. The MPI for Physics in Munich produced 49 sMDT chambers for this upgrade. The performance of all 49 chambers was measured with cosmic-ray muons: dark currents, electronics noise, muon detection efficiency, and the spatial resolution of all chambers were determined. The methods used for this certification and the results of the tests will be explained and shown in this presentation.