Response of the imaging plates to the electron beams from a linear accelerator at ultra-low intensity

The response of the imaging plate (IP) as a two-dimensional irradiation dose monitor of high-energy electrons has been investigated. The Co-60 γ-ray irradiation facilities and the 16 MeV S-band electron linear accelerator (linac) in Radiation Research Center, Osaka Prefecture University have been used for the experiments. From the results of the irradiation experiments with γ-rays uniform response of IP over the plate and linear response to the exposure have been obtained. Thermoluminescence dosimeter has been used to determine the exposure. The ultra-low intensity electron beams developed have been used. The results of the irradiation experiments with the narrow electron beams from the linac at an energy of 8 MeV have shown the linear response of IP to the total electron charge for irradiation. By the broad beam an IP image of a model sample has been obtained showing the characteristic scattering behavior of high-energy electrons. These results have shown the applicability of IP to monitoring two-dimensional dose distribution of electrons.