Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 14: Detectors 3 (muon detectors)

T 14.2: Talk

Monday, March 4, 2024, 16:15–16:30, Geb. 30.23: 3/1

New small diameter Muon Drift Tube (sMDT) Chambers and new MDT Front End Electronics for the Phase 2 Muon System Upgrade of the ATLAS Detector — •Daniel Buchin, Alice Reed, Elena Voevodina, Francesco Fallavollita, Oliver Kortner, and Hubert Kroha — Max-Planck-Institut für Physik

In order to improve the muon trigger efficiency and the rate capability of the ATLAS muon detectors for operation at the high luminosity upgrade of the Large Hadron Collider (HL-LHC), the Monitored Drift Tube (MDT) tracking chambers in the innermost barrel layer of the ATLAS Muon Spectrometer will be replaced by small-diameter Muon Drift Tube (sMDT) chambers. In addition, the electronics of the remaining MDT chambers has to be replaced by a new version able to cope with the trigger and data rates at the HL-HC. New Amplifier-Shaper-Discriminator (ASD) and new TDC chips have been developed for the new (s)MDT front-end electronics boards designed at MPP.

The sMDT chambers were in serial production between January 2021 and December 2022 at the MPP Munich. In this talk, the steps for the drift tube production and chamber construction will be presented. The stringent quality control program that assured the reliability and high mechanical precision of the chambers will be discussed as well. This includes tests of individual drift tubes, several mechanical measurements and the final certification using cosmic muons. Finally, the status of the new (s)MDT electronics designed at MPP will be discussed.

Keywords: MDT; ATLAS; HL-LHC; sMDT; Upgrade