Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Instrumentation VII

HK 31.3: Talk

Wednesday, March 12, 2025, 16:15–16:30, SR Exp1A Chemie

Simulation of the MAGIX 4-stage GEM Time Projection Chamber — •Sara Fechner for the MAGIX collaboration — Institute for Nuclear Physics, Johannes Gutenberg University Mainz, Germany

Located at the MESA electron accelerator MAGIX will perform high-precision scattering experiments in the low energy regime. The physics program includes the study of hadrons and few-body systems, as well as reactions relevant to nuclear astrophysics and dark sector searches. The experimental setup is designed to minimize background and multiple scattering. Key parts are the windowless gas jet target and two high-resolution spectrometers with a 4-stage GEM Time Projection Chamber (TPC) for precise tracking around the focal plane.

A dedicated simulation framework accompanies the experiment and aims to model the entire process - from particle generation over scattering to the detector response. For the TPC, this includes the ionization of the Argon gas mixture by the initial electron, the drift of the electrons inside the electric field, their multiplication in the GEM stack, and the subsequent electronic readout.

This contribution will introduce the MAGIX TPC and the physics used to model its detector response.

Keywords: Gas Detector; TPC; Simulation