Calibration of imaging plate for high energy electron spectrometer

A high energy electron spectrometer has been designed and tested using imaging plate (IP). The measurable energy range extends from 1 to 100 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 MeV. The calibration has been extended to 0.2 MeV using an existing data and Monte Carlo simulation Electron Gamma Shower code. The calibration results cover the energy from 0.2 to 100 MeV and show almost a constant sensitivity for electrons over 1 MeV energy. The temperature fading of the IP shows a 40% reduction after 80 min of the data taken at 22.5 degreesC. 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. (C) 2005 American Institute of Physics.