Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Instrumentation XVI

HK 60.1: Vortrag

Donnerstag, 31. März 2022, 14:00–14:15, HK-H5

Monte-Carlo simulations of low-energy X-ray interactions in the ALICE TPC — •Ankur Yadav, Philip Hauer, Philipp Bielefeldt, and Bernhard Ketzer for the ALICE collaboration — Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn

The ALICE Time Projection Chamber (TPC) was recently upgraded with a Gas Electron Multiplier (GEM) based readout in order to cope with the high Pb-Pb interaction rate of 50 kHz planned for Run 3 of the LHC. In the scope of an extensive commissioning program, several measurements were already conducted without the beam. This included the injection of the meta-stable radioactive isotope Kr-83m into the gas volume of the TPC as well as the irradiation of the TPC with an X-ray source.

In order to better understand and cross-check the measured data, the MC methods provided by the Geant4 toolkit were used to simulate the interaction of low energy X-rays and associated secondary particles in the TPC. A complete detector simulation chain was developed which includes drift, diffusion, gas amplification as well as the effects of electron attachment.

In this talk, the comparison between the simulations and the measured data will be presented.

Supported by BMBF