Temperature characteristic of LuAG scintillation detector for deep-well logging

Xiaoqin DENG; Tianyu HU; Guoqiang ZENG; Liangquan GE; Yuchong DING; Kaiqi ZHANG; Peng YU; Chengjun TAN

doi:10.11889/j.0253-3219.2017.hjs.40.110402

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Temperature characteristic of LuAG scintillation detector for deep-well logging

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2021-05-19

- Temperature characteristic of LuAG scintillation detector for deep-well logging
- NUCLEAR TECHNIQUES Vol. 40, Issue 11, Article number: 110402(2017)
- 作者机构：
  
  1.四川省辐射环境管理监测中心站成都 611139
  2.成都理工大学地学核技术重点实验室成都 610059
  3.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
- 作者简介：
- 基金信息：
  
  National 863 Project;Sichuan Youth Science & Technology Foundation
- DOI：10.11889/j.0253-3219.2017.hjs.40.110402
  CLC： TL99
- Received：17 April 2017，
  
  Revised：21 May 2017，
  
  Published：10 November 2017
- 稿件说明：
移动端阅览
Xiaoqin DENG, Tianyu HU, Guoqiang ZENG, et al. Temperature characteristic of LuAG scintillation detector for deep-well logging[J]. Nuclear techniques, 2017, 40(11): 110402
DOI：

Xiaoqin DENG, Tianyu HU, Guoqiang ZENG, et al. Temperature characteristic of LuAG scintillation detector for deep-well logging[J]. Nuclear techniques, 2017, 40(11): 110402 DOI： 10.11889/j.0253-3219.2017.hjs.40.110402.

摘要

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（Lu

）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20-170 ℃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（

137

Cs 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。

Abstract

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

137

Cs (662keV) were performed between LuAG (Lu

) and NaI:Tl scintillators

and the former is identified to be better in high-temperature resistance and energy resolution. LuAG together with Hamamatsu high-temperature type photomultiplier tube (R1288A-07) composed the probe for experiment. A temperature adjustable thermostat in the range of 20-170 ℃ was employed to the probe to study the effect of temperature on the energy resolution

channel and count rate of LuAG detector.

Results

The energy resolution (

137

Cs 662keV) of LuAG detector was the highest at (75±5) ℃

which changed within 2% from 20 ℃ to 70 ℃

and within 7% from 70℃ to 170 ℃.

Conclusion

The LuAG detector is more stable in high temperature situation and can be used in environments with large temperature changes such as deep-well logging. There is obvious channel drift induced by change of temperature

hence the related work shall be done to stabilize the spectrum.

关键词

Keywords

references

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