Date of Award
Open Access Thesis
Physics and Astronomy
The MUon Scattering Experiment (MUSE) at the Paul Scherrer Institute seeks to measure the muon-proton and electron-proton elastic cross-sections in the same experiment by measuring the scattering angle of particles from a 115-160 MeV beam onto a liquid hydrogen target. The timing detectors, as well as several of other detectors in the experiment, are plastic scintillators. This document discusses a method for the energy calibration, using 208Tl, 22Na, and 88Y sources, signal attenuation, and hit-position reconstructions of various timing detectors, as well as their function in the experiment as a whole. This method involves first attaining the pulse-height spectra experimentally, then creating a coincident Monte Carlo simulation, and finally finding a fit based on the two. The method of fitting uses iterative techniques to minimize the maximum likelihood in an energy range that covers the Compton edge in the distribution. Final calibration demonstrates the accuracy of this method to within 2 % for the various source measurements at the threshold of the detectors (around 2 MeV).
Flannery, A. G.(2023). Gamma Calibration of Scintillators for the MUon Scattering Experiment. (Master's thesis). Retrieved from https://scholarcommons.sc.edu/etd/7350