Dose rate measurement of pulsed X-ray reference radiation field

被引：0
|
作者：
Liu C. [1 ]
Zhang X. [1 ,2 ]
Li D. [1 ]
Cheng J. [1 ]
Zhang J. [1 ]
Huang J. [1 ]
Cao L. [1 ]
Cheng J. [1 ]
机构：
[1] Division of Ionizing Radiation, National Institute of Metrology, Beijing
[2] College of Nuclear Science and Technology, Lanzhou University, Lanzhou
[3] Unit 96901 of the PLA, Beijing
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2022年 / 43卷 / 11期
关键词：
air kerma rate; dose measurement; electronic dose rate meter; gate control technology; pulse waveform; pulse width; pulsed radiation field; pulsed X-ray;
D O I：
10.11990/jheu.202206018
中图分类号：
学科分类号：
摘要：
A pulsed X-ray reference radiation field used for transmission of radiation protection dose value is established by using the grid control technology in the National Institute of Metrology China to meet the traceability requirements of active dosimeters under pulsed radiation conditions and evaluate the accuracy of active dosimeters in measuring pulsed radiation dose. This pulsed X-ray reference radiation field has the characteristic of adjustable X-ray exposure time. The tube voltage, exposure time, pulse rise / fall time, and radiation field uniformity of the pulsed X-ray tube were tested, and the measurement method of the air kerma rate of the pulsed radiation field was studied simultaneously. The results of the study are summarized below. When using the interventional oscilloscope to measure the output tube voltage, the relative deviation of the measured and preset values of tube voltage is 0. 19% at 100 kV. In the established uniform radiation field, the air kerma rate measured by the ionization chamber is approximately 3 mGy / s when the tube voltage is 60 kV and the tube current is 50 mA. The results of this work can provide a reference for subsequent determinations of air kerma rates. © 2022 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：1642 / 1648
页数：6
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