脉冲X射线参考辐射场设计与研究

辐射防护 ›› 2023, Vol. 43 ›› Issue (6): 556-565.

脉冲X射线参考辐射场设计与研究

高飞, 张昕宇, 丁雨阳, 刘蕴韬, 王菲菲, 陈义珍, 刘佳瑞, 倪宁, 王子琳, 王子业, 赵旭

中国原子能科学研究院,计量与校准技术重点实验室,中核核工业计量与测试技术重点实验室,北京 102413

收稿日期:2022-12-19 出版日期:2023-11-20 发布日期:2023-12-25
作者简介:高飞(1983—),男,2005年7月毕业于辽宁大学物理学专业,2008年7月毕业于中国原子能科学研究院粒子物理与原子核物理专业,获硕士学位,2013年7月毕业于中国原子能科学研究院辐射防护及环境保护专业,获博士学位,研究员。E-mail:83jerry@163.com
基金资助:
国家质量基础设施体系专项(2022YFF0607303)。

Design and research on pulsed X-ray reference radiation field

GAO Fei, ZHANG Xinyu, DING Yuyang, LIU Yuntao, WANG Feifei, CHEN Yizhen, LIU Jiarui, NI Ning, WANG Zilin, WANG Ziye, ZHAO Xu

China Institute of Atomic Energy, National Key laboratory for Metrology and Calibraiton Techniques, China National Nuclear Corporation, Key Laboratory of Metrology and Measurement Technology, Beijing 102413

Received:2022-12-19 Online:2023-11-20 Published:2023-12-25

摘要/Abstract

摘要： 脉冲辐射在新型探测器研制、工业探伤、X射线诊断、核事故应急和科研等领域中已经得到了广泛应用,其辐射剂量(率)测试难度极大。为解决主动式辐射剂量仪的脉冲响应测试技术难题,基于多种X射线机建立了脉冲X射线参考辐射场,结合次级标准电离室及脉冲时间测量系统开展了脉冲辐射剂量(率)定值。实验结果表明,所建立的脉冲X射线参考辐射场的脉冲宽度在25 ns~10 s之间可调,瞬时剂量率范围为:5 mSv/h~6.7×10⁵ Sv/h,可广泛开展主动式辐射剂量仪的脉冲响应特性研究,对于解决脉冲辐射剂量监测仪器的校准难题具有重要意义。

关键词: 脉冲X射线, 电离室, 主动式辐射剂量仪, 响应

Abstract: International research on radiation protection dosimetry mainly focuses on continuous radiation. However, pulsed radiation has been widely used in the fields of new detector development, industrial flaw detection, X-ray diagnosis, nuclear accident emergency and scientific research. Pulsed radiation dose (rate) measurement is very difficult. In order to solve the technical problem of pulse response test of active radiation dosimeter, the generation principle of pulsed X-ray and gamma ray radiation field is discussed, and the reference radiation field of pulsed X-ray is established based on a variety of X-ray machines. Combined with the secondary standard ionization chamber and pulse time measurement system, the research of pulsed radiation dose (rate) measurement technology is carried out. The experimental results show that the pulse width of the established pulsed X-ray reference radiation field can be adjusted between 25 ns to 10 s, and the instantaneous dose rate range is 5 mSv/h to 6.7×10⁵ Sv/h, which can be widely used to study the pulsed X-ray response characteristics of active radiation dosimeter. This work can be widely used to study the pulse response characteristics of active radiation dosimeter, which is of great significance to solve the calibration problem of pulsed radiation dose monitoring instrument.

Key words: pulsed X ray, ionization chamber, active radiation dosimeters, response

中图分类号:

TL72

高飞, 张昕宇, 丁雨阳, 刘蕴韬, 王菲菲, 陈义珍, 刘佳瑞, 倪宁, 王子琳, 王子业, 赵旭. 脉冲X射线参考辐射场设计与研究[J]. 辐射防护, 2023, 43(6): 556-565.

GAO Fei, ZHANG Xinyu, DING Yuyang, LIU Yuntao, WANG Feifei, CHEN Yizhen, LIU Jiarui, NI Ning, WANG Zilin, WANG Ziye, ZHAO Xu. Design and research on pulsed X-ray reference radiation field[J]. RADIATION PROTECTION, 2023, 43(6): 556-565.

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