Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (11): 110402-110402.doi: 10.11889/j.0253-3219.2017.hjs.40.110402


Temperature characteristic of LuAG scintillation detector for deep-well logging

DENG Xiaoqin1, HU Tianyu2, ZENG Guoqiang2, GE Liangquan2, DING Yuchong3, ZHANG Kaiqi2, YU Peng2, TAN Chengjun2   

  1. 1 Sichuan Management and Monitoring Center Station of Radioactive Environment, Chengdu 611139, China;
    2 Nuclear Technology Key Laboratory of Earth Science, Chengdu University of Technology, Chengdu 610059, China;
    3 Material and Equipment Center, The 26 th Research Institute, China Electronics Technology Group Corporation, Chongqing 401332, China
  • Received:2017-04-17 Revised:2017-05-21 Online:2017-11-10 Published:2017-11-08
  • Supported by:
    Supported by National Natural Science Foundation of China (No.41474159), National 863 Project (No.2102AA061803), Sichuan Science and Technology Department Youth Fund Project (No.2015JQ0035)

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 137Cs (662keV) were performed between LuAG (Lu3Al5O12) 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 (137Cs 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.

Key words: LuAG detector, Temperature effect, Energy resolution, Channel drift, Deep-well logging

CLC Number: 

  • TL99