Scintillating Fiber Hodoscopes for the Proton Radius Measurement at AMBER

by Karl Eichhorn (TUM)

Thursday 8 Jan 2026, 09:30 → 10:30 Europe/Berlin

E18/ENE Seminar Room 3268 (TUM PH)

The AMBER collaboration aims to measure the electric charge radius of the proton by elastic scattering of high-energy muons on an active hydrogen target (TPC) at the M2 beamline at CERN’s Super Proton Synchrotron. For muon tracking, Unified Tracking Stations equipped with silicon pixel detectors in combination with Scintillating Fiber Hodoscopes (SFH) will be used. The SFH consists of four layers of 500-µm scintillating-plastic fibers read out with silicon photomultipliers (SiPMs), covering an active area of (9x9) cm2. The first SFH detector was built and successfully tested in 2025 at CERN; three more detectors are currently in production.