Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 96: DAQ, Trigger and Electronics IV

T 96.2: Talk

Thursday, March 18, 2021, 16:15–16:30, Tu

Development of calibration procedures for NSW Micromegas readout electronics — •Vladislavs Plesanovs, Stephanie Zimmermann, Gregor Herten, and Ulrich Landgraf — University of Freiburg

During the current LS2 at CERN, ATLAS muon spectrometer will be upgraded by exchanging one of its inner end-caps. The aim is to have extra input to the L1 muon trigger system to cope with expected rate and lower fake-muon trigger rate significantly. For this purpose the New Small Wheel (NSW) will consist of two complementary detector technologies: sTGC (trigger) and Micromegas (tracking). Data readout from these detectors will be conducted by dedicated front-end electronics.

Before physics data taking, a calibration of the readout electronics and signal conversion from digital units to physical values are required. The first procedure sets a global threshold above the noise in the readout chip level and adjusts it individually for each of /approx 2 million channels. The second calibration procedure converts input charge from ADC counts to Coulombs and TAC ADC to nanoseconds for further data processing.

The presentation focuses on the developed procedures, and their integration into ATLAS TDAQ software, which involves interplay with novel readout and TTC infrastructure like FELIX and ALTI. Also challenges that were tackled during development stage together with calibration results from on-detector front-ends will be presented.