|
|
|
| Calibration and Uncertainty Analysis of Protective Level X-ray Ionization Chambers |
| QU Bing-bing1,2,WU Jin-jie2,LU Ping-zhou1,2,LI Meng-yu1,2,SONG Fei1,2,ZHANG De-liang2,MA Ying-jie1,ZHAO Rui2 |
1. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China
2. National Institute of Metrology, Beijing 100029, China |
|
|
|
|
Abstract The protection level ionization chamber dosimeters are main measuring instrument for radiation protection and need to be calibrated under narrow spectrum series reference radiation qualities. The EGSnrc software was used to simulate the X-ray energy spectrum of the reference radiation quality. The maximum deviations of the spectral resolution and average energy obtained from the analysis and the recommended values of ISO 4037-1 were 7.1% and 1.04%, respectively, which met the specification requirements. Based on the (60~250) kV X-ray air kerma national primary standard, the air kerma at the reference point of 1m from the X-ray tube spot was reproduced under the narrow spectrum series reference radiation quality, and then two transfer ionization chambers were calibrated and transferred by the substitution method.Finally, the PTW-32002 spherical ionization chamber was calibrated by using the air specific release kinetic energy rate at 2.25m reproduced by the transfer ionization chamber, and the corresponding calibration factor was obtained. The relative expanded uncertainty of the calibration factor was 2.2%(k=2).
|
|
Received: 20 October 2021
Published: 20 August 2022
|
|
|
|
|
|
［1］蒋伟. 防护水平X射线个人剂量当量的测量与研究 ［D］. 成都: 成都理工大学, 2014.
［2］刘哲. 环境辐射监测仪表校准关键技术研究 ［D］. 成都: 成都理工大学, 2020.
［3］Zhang D L, Lai W C, Wu J J, et al. Establishment of ISO 4037-1 X-ray narrow-spectrum series ［C］// 7th International Symposium on Test Automation and Instrumentation. Beijing, China, 2019.
［4］ISO 4037-1-2019 X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy-Part 1: Radiation characteristics and production methods. International Organization for Standardization［S］.
［5］李云飞. 中能X射线参考辐射场及量值传递的研究 ［D］. 石家庄: 河北科技大学, 2019.
［6］张德亮. 重过滤窄谱X射线空气比释动能的测量与研究 ［D］. 成都: 成都理工大学, 2019.
［7］Butlera D J, Saitob N, Büeermannc L, et al. APMP supplementary comparison of air kerma in ISO 4037 Wide and Narrow Series X-ray beams: APMP.RI (I)-S3［R］. APMP, 2016.
［8］Burns D T , Kessler C , Wu J J, et al. Key comparison BIPM. RI (I)-K3 of the air-kerma standards of the NIM, China and the BIPM in medium-energy X-rays［R］. BIPM, 2017.
［9］林敏, 叶宏生, 夏文,等.CIAE电离辐射计量技术发展回顾 ［J］. 原子能科学技术, 2020, 54 (S1): 322-341.
Lin M, Ye H S, Xia W, et al. Review of Development of Ionizing Radiation Metrology Technology at CIAE ［J］. Atomic Energy Science and Technology, 2020, 54 (S1): 322-341.
［10］刘哲, 吴金杰, 曾国强,等.中能治疗水平X射线机发射率常数测定及MC模拟 ［J］. 核电子学与探测技术, 2020, 40 (1): 10-14.
Liu Z, Wu J J, Zeng G Q, et al. Determination of Emissivity Constant and MC Simulation of X-ray Machine ［J］. Nuclear Electronics & Detection Technology, 2020, 40 (1): 10-14.
［11］张德亮, 吴金杰, 杜海燕,等.低空气比释动能率X射线参考辐射质的建立 ［J］. 核电子学与探测技术, 2018, 38 (2): 217-222.
Zhang D L, Wu J J, Du H Y, et al. Establishment of X-ray Reference Radiation of Low Air-kerma Rate ［J］. Nuclear Electronics & Detection Technology, 2018, 38 (2): 217-222.
［12］赵瑞, 吴金杰, 王二彦,等.250～600kV X射线空气比释动能量值复现方法研究 ［J］. 原子能科学技术, 2021, 55 (4): 743-750.
Zhao R, Wu J J, Wang E Y, et al. Research on Method of Reproducing Air-kerma of 250～600 kV X-ray ［J］. Atomic Energy Science and Technology, 2021, 55 (4): 743-750.
［13］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.
［14］郭思明, 刘莹, 吴金杰.乳腺X射线基准装置半值层的测量 ［J］. 计量学报, 2018, 39 (3): 410-413.
Guo S M, Liu Y, Wu J J. Half Value Layer Measurement of Mammography X-ray Standard ［J］. Acta Metrologica Sinica, 2018, 39 (3): 410-413.
［15］王鹏, 邢立腾, 蒋伟.低空气比释动能率系列过滤X射线辐射质的测量与研究 ［J］. 计量学报, 2021, 42 (4): 521-525.
Wang P, Xing L T, Jiang W. Measurement and Research for the Filtered X-ray Radiation Quality of Low Air Kerma Rate Series ［J］. Acta Metrologica Sinica, 2021, 42 (4): 521-525.
［16］王家伟, 魏鹏, 马伯轩,等.诊断X射线检测设备半值层测量结果的影响因素 ［J］. 计量科学与技术, 2021, 65 (8): 3-6+28.
Wang J W, Wei P, Ma B X, et al. Main Factors Affecting Measurement Results of the Half-value Layer of Diagnostic X-ray Testing Equipment ［J］. Metrology Science and Technology, 2021, 65 (8): 3-6+28.
［17］王波, 任世伟, 吴金杰,等.250～450kV高能X射线空气比释动能不确定度分析 ［J］. 核电子学与探测技术, 2017, 37 (10): 1027-1033.
Wang B, Ren S W, Wu J J, et al. Uncertainty Analysis of (250～450)kV High Energy X-ray Air Specificity Kinetic Energy ［J］. Nuclear Electronics & Detection Technology, 2017, 37 (10): 1027-1033.
［18］李云飞, 王继, 吴金杰,等.乳腺X射线空气比释动能标准装置的研究 ［J］. 核电子学与探测技术, 2019, 39 (6): 703-706.
Li Y F, Wang J, Wu J J, et al. Study on Standard Device for Mammography X-Ray Air Kerma ［J］. Nuclear Electronics & Detection Technology, 2019, 39 (6): 703-706.
［19］宋飞, 赵瑞, 丁卫撑,等.X射线环境辐射监测仪器校准方法的研究 ［J］. 计量学报, 2021, 42 (9): 1237-1243.
Song F, Zhao R, Ding W C, et al. Research on calibration method of X-ray environmental radiation monitoring instrument ［J］. Acta Metrologica Sinica, 2021, 42 (9): 1237-1243.
［20］郝艳梅,吕雅竹,李德红, 等.热释光剂量计测量X射线半值层法初步探讨［J］. 计量学报, 2021, 42(6): 811-814.
Hao Y M, Lü Y Z, Li D H, et al. Initial Exploration of Half-value Layer Determination Using Thermoluminescent Dosimeter ［J］. Acta Metrologica Sinica, 2021, 42(6): 811-814.
［21］黄林茹,姚馨博,王继, 等.硅光电二极管探测器在低能X射线辐射场上的标定［J］. 计量学报, 2021, 42(6): 806-810.
Huang L R, Yao X B, Wang J, et al.Calibration of Silicon Photodiode Detector on Low Energy X-ray Radiation Fields［J］. Acta Metrologica Sinica, 2021, 42(6): 806-810. |
|
|
|
2022, Vol. 43 
