Speaker
Description
The proposed muEDM experiment at the Paul Scherrer Institute (PSI) in Switzerland is designed to search for a muon EDM with a sensitivity of 6×10^(-23) e⋅cm. It leverages the frozen-spin technique, which cancels the muon's anomalous precession within a compact storage solenoid. This approach considerably enhances the sensitivity of the search compared to the parasitic method using a storage ring at BNL/FNAL. For an EDM measurement, it is crucial to confine muons within the central region of the solenoid. This is accomplished using a fast entrance detector that generates a signal to initiate a pulsed magnetic kick, thereby halting the muon's longitudinal motion as it enters the central region. Equipped with a thin scintillator and four wall scintillators, this detector identifies incoming muons and rejects events that surpass the solenoid's acceptance. During a beam test at PSI in December 2022, we tuned the 27.5 MeV/c muon beam at piE1 to two focal positions and recorded 7×10^5 muon events. Prior to data collection, we carried out beam profiling to extract the Twiss parameters and emittance for these beam tunes. We incorporated these beam properties into a Geant4 simulation, which enabled us to compare the proportions of various muon scattering scenarios with those observed in the experimental data.
