Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 14: DAQ and Trigger 1
T 14.5: Vortrag
Montag, 21. März 2022, 17:15–17:30, T-H27
Test beam studies of the new ATLAS MDT front-end electronics in the GIF++ facility at CERN — •Davide Cieri1, Gregor Eberwein1, Markus Fras1, Oliver Kortner1, Hubert Kroha1, Chrysostomos Valderanis2, Elena Voevodina1, and Bastian Wesely1 — 1Max-Planck-Institut für Physik, Munich, Germany — 2Ludwig-Maximilians-Universität, Munich, Germany
The front-end readout electronics of the ATLAS Monitored Drift Tube (MDT) detector will be replaced for High-Luminosity LHC operations in order to provide a triggerless read-out required by the upgraded first-level muon trigger. The read-out chain of an MDT chamber is composed of several Amplifier/Shaper/Discriminator (ASD) ASICs, capturing the arrival signal at the wires; Time-to-Digital Converter (TDC) ASICs, performing the required time measurements on 24 channels coming from three ASD ASICs, and a Chamber Service Module (CSM), which multiplexes data from up to 18 TDCs and sends the data via two optical fibres to the MDT trigger processor for the further trigger processing and transmission to the data acquisition (DAQ) system. The front-end electronics were designed to cope with a hit rate of 600 kHz/tube, which is twice the maximum expected rate.
Prototypes of the entire MDT front-end electronics were operated on MDT chambers in a muon beam at the GIF++ facility at CERN in 2021 using two small MDT chambers. The electronics were shown to work perfectly under different levels of the photon background irradiation, covering twice the range of the expected background fluxes at the HL-LHC.