适用于深孔测井的LuAG闪烁体探测器的温度特性
针对深孔测井要求更小体积、更高探测效率、温度特性更稳定的需求,通过LuAG(Lu3Al5O12)与NaI:Tl闪烁体的对比实验和高温型光电倍增的选择,确定了由LuAG和Hamamatsu的高温型R1288A-07光电倍增管与之组成的探头。采用温度可调节的恒温箱对探头开展20-170oC范围的温度试验,重点分析温度对LuAG探测器能量分辨率、道址和计数率的影响,为LuAG闪烁体探测器在测井中的应用提供参考。实验结果表明,(75±5)℃为LuAG探测器能量分辨率(137Cs 662 keV)最佳温度;温度在20-70℃变化时,能量分辨率变化不超过2%;温度在70-170℃变化时,能量分辨率变化不超...
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Published in | 核技术 Vol. 40; no. 11; pp. 33 - 38 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
四川省辐射环境管理监测中心站 成都 611139%成都理工大学地学核技术重点实验室 成都 610059%中国电子科技集团公司第二十六研究所材料与装备中心 重庆 401332
2017
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Subjects | |
Online Access | Get full text |
ISSN | 0253-3219 |
DOI | 10.11889/j.0253-3219.2017.hjs.40.110402 |
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Summary: | 针对深孔测井要求更小体积、更高探测效率、温度特性更稳定的需求,通过LuAG(Lu3Al5O12)与NaI:Tl闪烁体的对比实验和高温型光电倍增的选择,确定了由LuAG和Hamamatsu的高温型R1288A-07光电倍增管与之组成的探头。采用温度可调节的恒温箱对探头开展20-170oC范围的温度试验,重点分析温度对LuAG探测器能量分辨率、道址和计数率的影响,为LuAG闪烁体探测器在测井中的应用提供参考。实验结果表明,(75±5)℃为LuAG探测器能量分辨率(137Cs 662 keV)最佳温度;温度在20-70℃变化时,能量分辨率变化不超过2%;温度在70-170℃变化时,能量分辨率变化不超过7%。由此可见,LuAG探测器在高温环境中稳定性较好,可应用于测井等具有较大温度变化的环境中。但是由于温度会引起比较明显的谱漂,因此使用时需要做好稳谱工作。 |
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Bibliography: | LuAG detector, Temperature effect, Energy resolution, Channel drift, Deep-well logging 31-1342/TL DENG Xiaoqin1,HU Tianyu2 ,ZENG Guoqiang2, GE Liangquan2 ,YU Peng2, TAN Chengjun2 ,DING Yuchong3 ,ZHANG Kaiqi2 (1Sichuan Management and Monitoring Center Station of Radioactive Environment, Chengdu 611139, China;2Nuclear Technology Key Laboratory of Earth Science, Chengdu University of Technology, Chengdu 610059, China;3 Material and Equipment Center, The 26th Research Institute, China Electronics Technology Group Corporation, Chongqing 401332, China) Background: Deep-well logging requires higher detection efficiency and more stable temperature characteristics for the detectors. Purpose: This study aims to investigate the temperature characteristic of LuAG scintillator detector of high energy resolution in well logging. Methods: Contrast experiments using radioactive source ^137Cs (662 keV) were performed between LuAG (Lu3A15O12) and NaI:Tl scintillators, and the former is identified to be better in high-temperature |
ISSN: | 0253-3219 |
DOI: | 10.11889/j.0253-3219.2017.hjs.40.110402 |