Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (6): 83 doi: 10.1007/s41365-017-0230-y

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

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

Bin-Qing Zhao1,2,Ming-Hua Zhao1,Ming Liu1,Chong-Xian Yin1,Hang Shu1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
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Bin-Qing Zhao, Ming-Hua Zhao, Ming Liu, Chong-Xian Yin, Hang Shu. The front-end electronics design of dose monitors for beam delivery system of Shanghai Advanced Proton Therapy Facility.Nuclear Science and Techniques, 2017, 28(6): 83     doi: 10.1007/s41365-017-0230-y

Abstract:

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.

Key words: Front-end electronics, Dose monitor, Proton therapy