Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 31: Instrumentation VII
HK 31.5: Vortrag
Mittwoch, 12. März 2025, 16:45–17:00, SR Exp1A Chemie
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 Ketzer1 — 1Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany — 2Physikalisches Institut der Universität Bonn, Germany — 3CERN, Geneva, Switzerland
AMBER is a fixed-target experiment at the M2 beamline of CERN’s SPS that uses muon and hadron beams for research on fundamental questions of hadron physics. Updating the spectrometer with a free-streaming readout is necessary for the upcoming precision measurement of the proton charge radius in muon-proton elastic scattering. New next-generation large-size triple-GEM detectors will be used for the reconstruction of muon trajectories in the spectrometer. Front-end electronics based on the VMM3a ASIC will allow a self-triggering data acquisition.
A prototype of such a detector was operated during a test run in September 2023. The aim was to define the working point of the detector in terms of thresholds as well as gas and electronics gains that fulfills the requirements both from physics and system readout bandwidth. In this talk, results will be presented which show that tracking efficiencies above 97 percent can be reached in a triple-GEM with VMM3a readout while matching the requirements of time and position resolution.
Supported by BMBF (05P2024 - AMBER).
Keywords: MPGD; AMBER; VMM