脉冲X射线参考辐射场设计与研究

Abstract

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

CLC Number:

TL72

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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Design and research on pulsed X-ray reference radiation field

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