Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Instrumentation VIII

HK 29.1: Gruppenbericht

Dienstag, 12. März 2024, 17:30–18:00, HBR 19: C 5a

Further development of the planar GEM detectors for AMBER — •Jan Paschek1, Karl Flöthner1,3, Dimitri Schaab1, Michael Lupberger1,2, Igor Konorov4, Pascal Henkel1, Paul Clemens1, and Bernhard Ketzer11Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, Germany — 2Universität Bonn, Physikalisches Institut, Bonn, Germany — 3GDD, CERN, Geneva, Switzerland — 4Technische Universität München, Physik-Department, Garching, Germany

AMBER is a new experiment at CERN's SPS studying fundamental questions of hadron physics using high-energy muon, pion, kaon and proton beams. It successfully concluded its first physics beam time in 2023, yielding valuable input for dark matter searches by measuring the production cross section of antiprotons impinging on helium. This study will be extended in 2024. In 2025, a first measurement of the proton electric form factor is scheduled, using elastic muon-proton scattering. New large-size planar GEM detectors are essential for the tracking of particles with small scattering angles. While for the antiproton production measurements, the new detectors will be operated with triggered readout electronics (APV25), the measurement of the proton form factor requires the application of a self-triggering chip (VMM3a). Extensive tests were performed on the noise performance with both readout variants. A full prototype detector read out by 48 VMM3a chips was tested in a pilot run in 2023. Also other new features of the new detectors are being studied. This presentation aims to provide a comprehensive overview of AMBER's new GEM detectors.

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