Speaker
Description
The AMBER experiment at CERN’s SPS explores fundamental questions in hadron physics using high-
energy muon, pion, kaon, and hadron beams. With successfully completing its first physics run in 2023
and 2024, AMBER will provide valuable data for dark matter searches by measuring the antiproton
production cross section on hydrogen, deuterium and helium targets. Looking ahead, the experiment
will carry out its first measurement of the proton electric form factor in 2025 through elastic muon-
proton scattering. Central to all measurement are the newly developed large-size planar GEM detectors,
which are crucial for tracking particles at small scattering angles.
For the antiproton production measurements, the detectors operated with APV25-based, triggered read-
out electronics. The proton form factor measurement will employ a self-triggering readout system em-
ploying the VMM3a frontend chip. Extensive tests have been conducted comparing the noise perfor-
mance of both systems. A full-scale prototype using 48 VMM3a chips was successfully tested in 2023,
and a comparison test with the triggered readout electronics was conducted in 2024.
This presentation will display a comprehensive comparison of detector performance with both readout
systems, based on data from the 2023 and 2024 test runs.
| Primary experiment | AMBER |
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