SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 74: Poster

HK 74.25: Poster

Donnerstag, 23. März 2023, 17:30–19:00, HSZ EG

Signal-to-noise ratio in the ALICE TPC with GEMs — •Janis Noah Jäger for the ALICE Germany collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

A major aspect of the recent ALICE upgrade is the upgrade of the Time Projection Chamber (TPC). The TPC is the main tracking and particle identification device of ALICE. By replacing the Multi-Wire Proportional Chambers (MWPC) with stacks of four Gas Electron Multiplier (GEM) foils, continuous readout of the TPC is achieved. Furthermore the installation of the GEMs implies specific design goals, such as the intrinsic noise of the electronics channels as well as the signal-to-noise ratio at the nominal gas gain of 2000. Different pad area and trace length result in variations of the properties. Additionally, external influences cause local variations of the noise.

In this poster the intrinsic noise together with the signal-to-noise ratio for minimum ionizing particles, measured in first pp collisions in LHC Run3, will be presented for the different pad regions of the TPC. The results will be compared with the design goals.