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Calibration of Silicon Photodiode Detector on Low Energy X-ray Radiation Fields |
HUANG Lin-ru1,2,YAO Xin-bo2,WANG Ji3,CHEN Can2,SUN Jian1,GUO Si-ming3,GUO Xiao-wei2,ZHANG Xiao-gai2,XU Hong-wei1 |
1. China Jiliang University, Hangzhou, Zhejiang 310018, China
2. Zhejiang Province Institution of Metrology, Hangzhou, Zhejiang 310018, China
3. National Institute of Metrology, Beijing 100029, China |
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Abstract Before calibrating synchrotron radiation X-ray energy, the silicon photodiode as a transfer detector needs to be calibrated. Using a low energy from 10 kV to 50 kV X-ray air kerma reference device to study the radiation response of silicon photodiodes, then use it to measure uniform radiation field range. As a transmission detector, the AXUV-100G has a high energy response in the energy range from 10 keV to 40 keV placing in the low energy X-ray reference radiation field. The uncertainty of reproducing air kerma is 0.57% in all radiative conditions.The diameter of visual field with an uniformity better than 99% of AXUV-100G at a distance of 1 m from the focal spot of the X-ray machine is about 61 mm, and better than 95% is 96 mm, which meets the requirements of secondary transmission standard value reproduction and transmission.
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Received: 20 June 2019
Published: 23 June 2021
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