Timing Detectors With SiPM Read-Out For The MUSE Experiment At PSI
Authors
Rostomyan, T. ; Cline, E. ; Lavrukhin, I.; Atac, H.; Atencio, A. ; Bernauer, J. C. ; Briscoe, W.; Cohen, D.; Cohen, E.; Collicott, C.; Deiters, K. ; Reimer, P.
Abstract
The Muon Scattering Experiment at the Paul Scherrer Institut uses a mixed beam of electrons,muons, and pions, necessitating precise timing to identify the beam particles and reactions theycause. We describe the design and performance of three timing detectors using plastic scintillatorread out with silicon photomultipliers that have been built for the experiment. The Beam Hodoscope, upstream of the scattering target, counts the beam flux and precisely times beam particlesboth to identify species and provide a starting time for time-of-flight measurements. The BeamMonitor, downstream of the scattering target, counts the unscattered beam flux, helps identifybackground in scattering events, and precisely times beam particles for time-of-flight measurements. The Beam Focus Monitor, mounted on the target ladder under the liquid hydrogen targetinside the target vacuum chamber, is used in dedicated runs to sample the beam spot at threepoints near the target center, where the beam should be focused.