Compact RF linear accelerator for electron beam irradiation applications at PBP-CMU Electron Linac Laboratory  

作　　者：Monchai Jitvisate Pittaya Apiwattanakul Noppadol Kangrang Jatuporn Saisut Chitrlada Thongbai Sakhorn Rimjaem 

机构地区：[1]PBP-CMU Electron Linac Laboratory,Department of Physics and Materials Science,Plasma and Beam Physics Research Facility,Faculty of Science,Chiang Mai University,Chiang Mai 50200,Thailand [2]Research Unit for Development and Utilization of Electron Linear Accelerator and Ultrafast Infrared/Terahertz Laser,Chiang Mai University,Chiang Mai 50200,Thailand [3]Thailand Center of Excellence in Physics,Ministry of Higher Education,Science,Research and Innovation,Bangkok 10400,Thailand [4]Present Address:School of Physics,Institute of Science,Suranaree University of Technology,Nakhon Ratchasima 30000,Thailand

出　　处：《Nuclear Science and Techniques》2025年第4期45-58,共14页核技术(英文)

基　　金：supported by Chiang Mai University for providing infrastructure and the NSRF via the Program Management Unit for Human Resources&Institutional Development,Research and Innovation[grant number B05F650022]for the software CST Studio Suite^(■)2023;Financial support for the reengineering and commissioning of the accelerator system was provided by the Thailand Center of Excellence in Physics(ThEP Center),Science and Technology Park Chiang Mai University(CMU STeP)。

摘　　要：A 4 MeV RF linear accelerator for electron beam irradiation applications has been developed at the PBP-CMU Electron Linac Laboratory,Thailand.The system has been reengineered using a decommissioned medical linear accelerator.The main components include a thermionic DC electron gun,an RF linear accelerator,a beam diagnostic chamber,and a beam exit window for electron beam irradiation.Therefore,reengineering must be performed based on the characteristics of the electron beam and its dynamics throughout the system.In this study,the electron beam current density emitted from the cathode was calculated based on the thermionic emission theory,and the result was used to produce the electron beam distribution in the gun using CST Studio Suite^(■)software.The properties of the electron beam and its acceleration in the linear accelerator and downstream diagnostic section were studied using the ASTRA electron beam dynamics simulation code,with the aim of producing an electron beam with an average energy of 4 MeV at the linear accelerator exit.The transverse beam profile and electron deposition dose in the ambient environment were calculated using Geant4 Monte Carlo simulation software to estimate the beam performance for the irradiation experiments.The parameters studied can be used as guidelines for machine operation and future experimental plans.

关 键 词：Thermionic electron gun RF linear accelerator Electron dynamics simulation Monte Carlo simulation Electron beam irradiation Electron beam processing Deposition dose 

分 类 号：TL5[核科学技术—核技术及应用]