Aug 20 – 26, 2023
Natural Science Lecture Center (building-28), Seoul National University, Korea
Asia/Seoul timezone

Study of Beam Effects for Muon Entrance Detector for the muEDM Experiment at PSI

Not scheduled
20m
Natural Science Lecture Center (building-28), Seoul National University, Korea

Natural Science Lecture Center (building-28), Seoul National University, Korea

Natural Science Lecture Center Seoul National University Building-28, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
Poster WG4: Muon Physics

Speaker

Jun Kai Ng (Shanghai Jiao Tong University)

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.

Primary author

Jun Kai Ng (Shanghai Jiao Tong University)

Co-authors

Guan Ming Wong (TDLI (Shanghai Jiao Tong University)) Dr Kim Siang Khaw (Tsung-Dao Lee Institute (CN)) Meng Lv Tianqi Hu

Presentation materials