Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Instrumentation VIII

HK 29.2: Vortrag

Dienstag, 12. März 2024, 18:00–18:15, HBR 19: C 5a

Characterization of a prototype GEM detector with VMM3a readout at AMBER — •Pascal Henkel1, Michael Lupberger1, Martin Hoffmann1, Karl Jonathan Flöthner1, 3, Virginia Klapper1, Jan Glowacz2, and Bernhard Ketzer11Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany — 2Physikalisches Institut der Universität Bonn, Germany — 3CERN, Geneva, Switzerland

The AMBER experiment is a new fixed-target experiment at CERN's M2-beamline which started data taking in 2023 and intends to answer fundamental questions in the field of hadron physics. One important experiment in phase-1 of AMBER is the measurement of the proton charge radius by muon-proton elastic scattering. GEM detectors will be used to reconstruct scattered-muon trajectories and momenta. The experimental setup requires a continuously streaming readout of all detectors. Current plans are to use a readout system based on the VMM3a ASIC as GEM frontend chip, featuring a continuous self-triggered data aquisition.

In September 2023, data were taken under realistic AMBER beam conditions using a prototype large-size triple-GEM detector with continuous VMM3a readout. In this contribution, we will present the ongoing data analysis aiming at finding a stable working point of the detector fulfilling the requirements of the experiment. This involves characterizing the detector in terms of efficiency, signal-to-noise ratio, position and time resolution.

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