Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 105: Muon detectors

T 105.5: Talk

Friday, April 3, 2020, 12:05–12:20, L-3.016

Position Reconstruction in the ATLAS New Small Wheel — •Patrick Scholer, Ulrich Landgraf, and Stephanie Zimmermann — Albert-Ludwigs-Universität Freiburg

During the current shutdown of the LHC, the innermost end cap of the Muon Spectrometer of the ATLAS detector will be replaced by the so called New Small Wheel (NSW). It uses Micro Mesh Gaseous Detectors (Micromegas) and small-strip Thin Gap Chambers (sTGCs) as its detector technologies; both providing a high spatial resolution at high incidence rates.

This talk will discuss the position reconstruction with the NSW detectors. The focus is set on the Micromegas detectors where the measurement of the drift time of the primary ionization can be used to turn it into a micro time-projection chamber. The performance of different reconstruction algorithms applied on the Monte Carlo simulation of the NSW and on test-beam data will be compared. Furthermore, the impact of different detector imperfections applied in the Monte Carlo simulation will be presented. These imperfections contain e.g. worsening of charge and time resolutions and reduced efficiencies in different detector regions.