Abstract
ABSTRACT A single-electron measurement technique is developed at the Kyoto University Free Electron Laser (KU-FEL) facility, and the responses of crystalline scintillators to electrons of 2–6 MeV are investigated. Precise control of the thermionic cathode of the radio frequency gun and the bending magnet allow a low-intensity monoenergetic electron beam to be produced for single-electron measurements. The pulse-height distributions and energy proportionalities are measured for three scintillators (PWO, LaBr3:Ce, and LYSO:Ce). The shapes of the observed pulse-height distributions almost match those of deposited energy distributions calculated by Monte Carlo simulations, thereby making it possible to deduce the energy deposition to the detectors, and all the scintillators show good proportionalities.
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