Design and development of an ACCT for the Shanghai advanced proton therapy facility

作     者：Hong Zhang Jun-Zhou Li Rui Hou Sun An Shi-Quan Xu You-Chun Liu Peng-Jiao Zhang Jie Song Yue-Lin Zhang Hong Zhang;Jun-Zhou Li;Rui Hou;Sun An;Shi-Quan Xu;You-Chun Liu;Peng-Jiao Zhang;Jie Song;Yue-Lin Zhang

作者机构：College of Engineering and Applied SciencesNanjing UniversityNanjing 210093China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2022年第33卷第10期

页      面：41-52页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 08[工学] 10[医学] 

基　　金：supported by the Ministry of Education of the People's Republic of China(MOE)(No.021312921002) 

主　　题：Beam current monitors ACCT Particle beam diagnostics 

摘      要：The Shanghai advanced proton therapy facility is a proton cancer treatment device designed and built by the Shanghai Institute of applied physics at the Chinese academy of *** accelerator part comprises a proton linear accelerator(linac)injector and a circular *** alternating current current transformer(ACCT)is used for non-intercepting beam current measurement at the drift tube linac *** to the beam characteristics,the ACCT is required to complete real-time beam current and pulse width measurements at currents of3-30 mA,frequencies of 1-10 Hz,and pulse widths of40-400μ*** this paper,we report the design and development of an *** designed ACCT was simulated using CST Microwave Studio,and calibrated using an oscilloscope and signal *** in the output signal of the ACCT were investigated as a function of ceramic gap size,number of coil turns,and *** to the simulation and experimental results,the optimal number of coil turns was found to be *** addition,a low-pass filter was adopted to filter the noise introduced during long-distance signal transmission using a coaxial cable with the length of 20 *** calibration results show that the corresponding rise time of the ACCT is 800 ns with the sensitivity of 8.2 V/A and a droop of less than 1%,meeting the design requirements.