| Zhang Zhen,Hou Changsong,Liang Jing,Zhang Qingzhao,Lian Dexing,Zhang Qi,Zhu Weiguo.Measurement and discussion of circuit time constants for radiation detectors[J].Chinese Journal of Radiological Medicine and Protection,2017,37(8):609-613 |
| Measurement and discussion of circuit time constants for radiation detectors |
| Received:February 04, 2017 |
| DOI：10.3760/cma.j.issn.0254-5098.2017.08.010 |
| KeyWords:Circuit time constant Ambient dose equivalent rate Least square method Uncertainty |
| FundProject:国家重大科学仪器设备开发专项（2012YQ18011806） |
| Author Name | Affiliation | E-mail | | Zhang Zhen | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Hou Changsong | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Liang Jing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Zhang Qingzhao | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Lian Dexing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Zhang Qi | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Zhu Weiguo | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | zwg@borui.bj.cn |
|
| Hits: 2758 |
| Download times: 2667 |
| Abstract:: |
| Objective To measure the circuit time constants of 4 kinds of radiation survey meters (451P ionization chamber dosimeter, 6150AD6+6150AD-b dose meter, FH40G+FHZ672E-10 dose meter and AT1123 dose meter) and, to discuss the formula of time response correction and its application. Methods In the condition of continuous exposure of X-ray machine, the ambient dose equivalent rates shown by survey meters were recorded. In order to get the circuits time constant, the least squares fittingmethod was used to fit the data using the time response formula of circuit having a capacitance C and a resistance R in series. Results The relative uncertainty of fitted circuit time constants was higher than 20% except for 6150AD6+6150AD-b dose meter. The relative uncertainty of fitted τ was 8% for 6150AD6+6150AD-b dose meter. Conclusions The time required to stabilize the dosimeter readings was 8, 5, 3 and 2 s, respectively, for the 451P ionization chamber dosimeter, 6150AD6+6150AD-b dose meter, FH40G+FHZ672E-10 dose meter and AT1123 dose meter. The rising trend of their measured values was not fully accordance with the RC circuit time response correction formula. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
