The research progress of some key problems about the protection of industrial electron irradiation accelerator

摘要

Different designs of ventilation duct will greatly influence dose rate of the exit. Because of the high dose rate under the target, it is suitable to use multi-tortuous duct when duct locating under target. It will reduce the dose rate about 3 orders of magnitude at the exit that add one backscattering interface in duct. Choose reasonable diameter and angle of embedded duct so that photons scatter as much as possible. We can use multiple small diameter ducts to replace large diameter duct. The system of Mini-DDL, Gamma detector and PC give a better reflection on the running statue of accelerator, its perfect usability can produce intuitive images for analyzed, it is important and helpful for workers and researchers to know about the radiation level of machine and environment. The measured results along the maze show that the maze must be long enough in order to achieve the desired shielding thickness. In future, we will combine the different kinds and motor patterns of body models, Monte Carlo programs, real time monitoring system with theoretical calculations to explore how the radiation field around accelerator has impact on human organs, get the dose distribution of body models so that improve the radiation protection to electron accelerator.