The front-end electronics design of dose monitors for beam delivery system of Shanghai Advanced Proton Therapy Facility

作     者：Bin-Qing Zhao Ming-Hua Zhao Ming Liu Chong-Xian Yin Hang Shu 

作者机构：Shanghai Institute of Applied PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences 

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

年 卷 期：2017年第28卷第6期

页      面：154-160页

核心收录：

学科分类：08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Front-end electronics Dose monitor Proton therapy 

摘      要：A front-end electronics of dose monitor has been developed for measuring irradiation dose to the patient in Shanghai Advanced Proton Therapy Facility.The parallel plate ionization chamber is used for the dose monitoring.Unlike the traditional method of recycling capacitor integration and voltage-to-frequency conversion,this dose monitor electronics uses the trans-impedance amplifier and analog-to-digital conversion method.It performs satisfactorily,with the integral nonlinearity of less than ±0.04 nA in the range of-400 to 50 nA and the resolution of about±0.6 nA.