Radio frequency conditioning of an S-band accelerating structure prototype for compact proton therapy facility  

作　　者：Yu Zhang Wen-Cheng Fang Xiao-Xia Huang Jian-Hao Tan Shao-Peng Zhong Cheng-Cheng Xiao Jun-Qiang Zhang Cheng Wang Yu-Qing Yang Zhen-Tang Zhao 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Shanghai Tech University,Shanghai 201210,China [4]Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China

出　　处：《Nuclear Science and Techniques》2021年第6期94-107,共14页核技术（英文）

基　　金：supported by National Key R&D Program of China(No.2018YFF0109203)。

摘　　要：The development of a high-gradient accelerating structure is underway to construct a compact proton linear accelerator for cancer treatment.Extensive experiments and numerous studies are being conducted to develop compact linear accelerators for proton therapy.Optimization of the electromagnetic and mechanical design has been performed to simplify the manufacturing process and reduce costs.A novel high-gradient structure with a low relativistic proton velocity(β),v/c=0.38,was designed,fabricated,and tested at high power.The first full-scale prototype was also successfully tested with high radio frequency(RF)power,a repetition rate of 50 Hz,and pulse length of 3μs to reach a high-gradient of 46 MV/m using a 50 MW S-band klystron power supply obtained from the Shanghai Soft X-ray Free Electron Laser Facility.This is the first high-power test in China,which is in line with the expected experimental goal.This study presents preliminary high-power testing of S-band standing wave accelerating structures with 11 cells.This work aims to verify the feasibility of using a high-gradient RF accelerating structure in compact proton therapy facilities.The cold test of the prototype cavity was completed in advance.Details of the high-power RF test setup,the process of RF conditioning,and the high-power results are described.

关 键 词：S-BAND Standing wave(SW) High-gradient Accelerating structure RF conditioning 

分 类 号：R197.39[医药卫生—卫生事业管理]