Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 40: DAQ, trigger and electronics II

T 40.2: Vortrag

Dienstag, 31. März 2020, 17:15–17:30, L-3.015

Development of Calibration Procedures for NSW Micromegas readout electronics — •Vladislavs Plesanovs, Stephanie Zimmerman, and Gregor Herten — Albert-Ludwigs-Universität Freiburg, Freiburg im Breisgau, Germany

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 an extra input to the L1 muon trigger system to cope with expected event rate and to 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 is required. Calibration procedure sets a global threshold above the noise on the readout chip level and adjusts it individually for each of ≈ 2 million channels. Second part requires a conversion procedure of the input charge from ADC counts to Coulombs and time from bunch crossing clock units to nanoseconds for further data processing.

This presentation will discuss how the developed procedures are integrated with cutting-edge technologies like FELIX, ALTI and present ATLAS TDAQ infrastructure. Also, challenges that were tackled at the development stage together with calibration results of the first commissioned sector of the NSW will be presented.