Gießen 2024 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Instrumentation V

HK 18.3: Talk

Tuesday, March 12, 2024, 16:15–16:30, HBR 19: C 5a

TPC cluster shape analysis — •Janis Noah Jäger for the ALICE Germany collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

An important aspect of the latest ALICE upgrade is the upgrade of the Time Projection Chamber (TPC). The TPC is the main tracking and particle identification device in ALICE. By replacing the Multi-Wire Proportional Chambers (MWPC) with stacks of four Gas Electron Multiplier (GEM) foils, a continuous readout of the TPC is achieved. The modification also required a major upgrade of the entire readout chain, from the front-end cards, via data acquisition and distribution, up to online reconstruction and data compression. Furthermore, the complete reconstruction and calibration software was rewritten, including the TPC cluster finding algorithm.

This talk discusses the analysis of cluster shapes as a function of different track properties and compares it with Monte Carlo simulations. Properties such as track angles can lead to a broadening of the cluster. Effects such as diffusion also play an important role in the shape of the cluster.

Keywords: ALICE; TPC; cluster; shape