Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 90: Muon detectors

T 90.8: Vortrag

Donnerstag, 18. März 2021, 17:50–18:05, To

Construction of new small-diameter Monitored Drift Tube (sMDT) chambers for the HL-LHC upgrade of the ATLAS Muonspectrometer — •Marian Rendel, Patrick Rieck, Verena Walbrecht, Oliver Kortner, and Hubert Kroha — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München

In order to improve the muon trigger efficiency of the ATLAS muon spectrometer for the high luminosity upgrade of the Large Hadron Collider (HL-LHC), the precision tracking Monitored Drift Tube (MDT) chambers in the inner barrel layer will be replaced by integrated stations combining new thin-gap RPC trigger chambers with new small-diameter Monitored Drift Tube (sMDT) chambers. The sMDT chambers are designed to meet the very tight space constraints in the detector and to provide an order of magnitude higher background rate capability compared to the current detectors.

The sMDT chambers have to provide a sense wire positioning accuracy of better than 20 µm. The assembly procedures and the results of the measurements of the geometry of prototype chambers and of the first chambers of the serial production are discussed.