基于波长位移光纤的232Th+ZnS(Ag)闪烁体中子探测器

白召乐, 周琦, 杨楠, 刘锋, 杨中建, 陈宝维, 王建龙

清华大学学报(自然科学版) ›› 2018, Vol. 58 ›› Issue (6) : 558-562.

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清华大学学报(自然科学版) ›› 2018, Vol. 58 ›› Issue (6) : 558-562. DOI: 10.16511/j.cnki.qhdxxb.2018.26.028
核能与新能源工程

基于波长位移光纤的232Th+ZnS(Ag)闪烁体中子探测器

  • 白召乐1,2, 周琦3, 杨楠4, 刘锋3, 杨中建4, 陈宝维4, 王建龙1
作者信息 +

Scintillation neutron detectors based on a wavelength-shifting optical fiber using 232Th+ZnS(Ag)

  • BAI Zhaole1,2, ZHOU Qi3, YANG Nan4, LIU Feng3, YANG Zhongjian4, CHEN Baowei4, WANG Jianlong1
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文章历史 +

摘要

闪烁体光纤探测器是近年来发展起来的一种可用于中子测量的新型探测器,为了提高闪烁体光纤探测器的中子探测效率,该文以232Th+ZnS(Ag)为探测器材料,利用波长位移光纤代替普通光纤收集和传输信号,并对改进的探测器的探测效率进行了理论分析和实验验证。研究结果表明:波长位移光纤探测器的计数率约为普通光纤的1.7倍。该探测器应用于加速器驱动次临界系统的中子探测,获得了次临界反应堆实验装置中子的分布变化规律,与计算结果较为一致。

Abstract

Optical fiber scintillator neutron detectors have developed rapidly in recent years because these detectors are small (so that they can be extended into narrow spaces) and give real-time measurements. However, the probe detection efficiency is low due to the small size of the probe's effective detection material. This study presents a theoretical and experimental study of a 232Th+ ZnS(Ag) neutron detector with a wavelength-shifting fiber was used to improve the detection efficiency. This detector was used to measure the neutron distribution of the ADS sub-critical experimental assembly with the measurement results being consistent with the theoretical model which indicates that the high detection efficiency is very good and the wavelength-shifting fiber neutron detector is accurate.

关键词

波长位移光纤 / 闪烁体中子探测器 / 探测效率

Key words

wavelength-shifting fiber / scintillator neutron detector / detection efficiency

引用本文

导出引用
白召乐, 周琦, 杨楠, 刘锋, 杨中建, 陈宝维, 王建龙. 基于波长位移光纤的232Th+ZnS(Ag)闪烁体中子探测器[J]. 清华大学学报(自然科学版). 2018, 58(6): 558-562 https://doi.org/10.16511/j.cnki.qhdxxb.2018.26.028
BAI Zhaole, ZHOU Qi, YANG Nan, LIU Feng, YANG Zhongjian, CHEN Baowei, WANG Jianlong. Scintillation neutron detectors based on a wavelength-shifting optical fiber using 232Th+ZnS(Ag)[J]. Journal of Tsinghua University(Science and Technology). 2018, 58(6): 558-562 https://doi.org/10.16511/j.cnki.qhdxxb.2018.26.028

参考文献

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基金

国家自然科学基金资助项目(11775193)

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