Calibration of imaging plate for high energy electron spectrometer

Abstract

A high energy electron spectrometer has been designed and tested using imaging plate (IP). The measurable energy range extends from $1\text{to}100\mathrm{MeV}$ or even higher. The IP response in this energy range is calibrated using electrons from L-band and S-band LINAC accelerator at energies 11.5, 30, and $100\mathrm{MeV}$ . The calibration has been extended to $0.2\mathrm{MeV}$ using an existing data and Monte Carlo simulation Electron Gamma Shower code. The calibration results cover the energy from $0.2\text{to}100\mathrm{MeV}$ and show almost a constant sensitivity for electrons over $1\mathrm{MeV}$ energy. The temperature fading of the IP shows a 40% reduction after $80\min$ of the data taken at $22.5°\mathrm{C}$ . Since the fading is not significant after this time we set the waiting time to be $80\min$ . The oblique incidence effect has been studied to show that there is a $1∕\cos \theta$ relation when the incidence angle is $\theta$ .