Study of crystalline scintillator response with development of single-electron beam of 2–6 MeV at KU-FEL

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.

KEYWORDS:

• Crystalline scintillator
• electron response
• proportionality
• single-electron beam

Acknowledgments

This work was supported by the Joint Usage/Research Program on Zero-Emission Energy Research of the Institute of Advanced Energy, Kyoto University (ZE31B-14). Z.T. is grateful for the assistance given by the Shota Rustaveli National Science Foundation of Georgia (SRNSF).

Disclosure statement

No potential conflict of interest was reported by the authors.