Optimization Design of X-ray Flattening Filter and Shielding of 25 MeV Electron Accelerator Used for Blood Irradiator

ABSTRACT

According to the epidemic prevention requirements of the coronavirus disease 2019 and technical requirements of blood irradiators, a new type of blood irradiator based on X band 2.5 MeV electron linear accelerator has been developed at Xihua University. In this paper, MCNP5 was used to optimize the design of flattening filter and shielding of X ray beam of the blood irradiator, and relevant experimental verification was carried out. After optimization design, the X ray beam flatness of the blood irradiator is improved from 59.8% to 92.4%, the weight of the shielding structure is reduced, and the maximum dose rate at 50 mm around the shielding body is 1 μSv/h, which is much better than the Chinese national standard of blood irradiator. © 2022, Editorial Board of Nuclear Electronics & Detection Tech. All right reserved.