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
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.
［1］ 尚智丛, 王鑫. 国家目标引导下的大科学装置建设——以上海同步辐射光源为例［J］. 科技管理研究, 2016, (2): 37-41.
Shang Z C, Wang X. The Large-scale Scientific Facility and the National Goal: A Case Study on SSRF［J］. Science and Technology Management Research, 2016, (2): 37-41.
［2］ 冼鼎昌. 北京同步辐射装置及其应用［M］. 南宁: 广西科学技术出版社, 2016: 30-74.
［3］ 刘金元, 薛凤仪, 李平, 等. 真空紫外-软X 射线波段(5～105 nm)探测器校准装置的研制［J］. 计量学报, 2008, 29(3): 275-279.
Liu J Y, Xue F Y, Li P, et al. Detector Calibration Facility in the Wavelength Range of VUV-Soft X-Ray (5～105 nm)［J］. Acta Metrologica Sinica, 2008, 29(3): 275-279.
［4］ 崔聪悟, 崔明启, 易荣清. 软X射线绝对光强测量系统及其标定［J］. 高能物理与核物理, 1998, 22(2): 180-185.
Cui C W, Cui M Q, Yi R Q. Design and Calibration of the Measuring System for Soft X-ray Absolute Intensity［J］. High Energy Physics and Nuclear Physics, 1998, 22(2): 180-185.
［5］ 杜海燕, 李凡, 吴金杰, 等. 同步辐射单能X射线空气质量衰减系数的测量［J］. 计量学报, 2019, 40(2): 333-336.
Du H Y, Li F, Wu J J, et al. The Measurement of Synchrotron Radiation Single-energy X-ray Mass-attenuation Coefficient of Air［J］. Acta Metrologica Sinica, 2019, 40(2): 333-336.
［6］ 李华鹏, 郑伟宁, 赵屹东,等. 同步辐射硬X射线光子通量的绝对测量［J］. 光学精密工程, 2017, 25(11): 2845-2851.
Li H P, Zheng W N, Zhao Y D, et al. Absolute measurement of photon flux for synchrotron radiation hard X-rays［J］. Optics and Precision Engineering, 2017, 25(11): 2845-2851.
［7］ 王培玮, 郑伟宁. 用于同步辐射X射线注量绝对测量的自由空气电离室［J］. 计量学报, 2020, 41(10): 1303-1307.
Wang P W, Zheng W N. Free Air Ionization Chamber for the Absolute Measurement of Synchrotron Radiation X-ray Fluence［J］. Acta Metrologica Sinica, 2020, 41(10): 1303-1307.
［8］ Aruev P N, Kolokolnikov Y M, Kovalenko N V, et al. Characterization of spatial homogeneity of sensitivity and radiation resistance of semiconductor detectors in the soft X-ray range［J］. Nuclear Instruments and Methods in Physics Research A, 2009, 603(1-2): 58-61.
［9］ GB/T 12162. 1-2000 用于校准计量仪和剂量率仪及确定其能量响应的X和γ参考辐射第一部分: 辐射特性及产生方法［S］.
［10］ OBrienM , Bueermann L. Comparison of NIST and PTB Air-Kerma Standards for Low-Energy X-Rays［J］. Journal of Research of the National Institute of Standards and Technology, 2009, 114(6): 321-331.
［11］ 吴金杰, 王培伟, 段小娟,等. 低能X射线基准辐射装置的建立［J］. 计量学报, 2011, 32(6A): 9-13.
Wu J J, Wang P W, Duan X J, et al. The Establishment of Radiation Primary Standard in the Range of Low Energy X-rays［J］. Acta Metrologica Sinica, 2011, 32(6A): 9-13.
［12］ JJG 2095-2012 (10~60)kV X射线空气比释动能计量器具检定系统表［S］.
2021, Vol. 42 
