Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 96: Trigger und DAQ 2

T 96.1: Talk

Wednesday, March 29, 2017, 16:45–17:00, VSH 17

Optimization of the ATLAS (s)MDT readout electronics for high counting rates — Oliver Kortner, Hubert Kroha, Sebastian Nowak, Clemens Schmid, and •Korbinian Schmidt-Sommerfeld — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München

In the ATLAS muon spectrometer, Monitored Drift Tube (MDT) chambers are used for precise muon track measurement. For the high background rates expected at HL-LHC, which are mainly due to neutrons and photons produced by interactions of the proton collision products in the detector and shielding, new small-diameter muon drift tube (sMDT)-chambers with half the drift tube diameter of the MDT-chambers and ten times higher rate capability have been developed. The standard MDT readout electronics uses bipolar shaping which causes a deterioration of signal pulses by preceding background hits, leading to losses in muon efficiency and drift tube spatial resolution. In order to mitigate these so-called signal pile-up effects, new readout electronics with active baseline restoration (BLR) is under development. Discrete multi channel prototype electronics with BLR functionality has been tested in the Gamma Irradiation Facility at CERN under high γ-irradiation rates. Results of the measurements will be presented.