Detector system of the SENJU single-crystal time-of-flight neutron Diffractometer at J-PARC/MLF
Detector system of the SENJU single-crystal time-of-flight neutron Diffractometer at J-PARC/MLF
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J-PARC/MLF 的 SENJU 单晶飞行时间中子衍射仪探测器系统
DOI：
10.1016/j.nima.2013.09.057
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
M. Katagiri
中科院分区：
文献类型：
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作者：
T. Kawasaki;T. Nakamura;K. Toh;T. Hosoya;K. Oikawa;T. Ohhara;R. Kiyanagi;M. Ebine;A. Birumachi;K. Sakasai;K. Soyama;M. Katagiri
本文介绍了单晶飞行时间中子衍射仪SENJU的探测器系统，SENJU是日本质子加速器研究综合体材料与生命科学实验装置中第一台采用大面积二维波长漂移光纤闪烁体探测器的衍射仪。在仪器中安装了37个探测器，以覆盖30%的散射角。探测器组件对热中子的探测效率为37- 47 1%（平均值±标准差），对60 Co γ射线的灵敏度为1.4- 5.1 0.1 10 −6，本底计数率为2.1- 3.8 1.0 10 − 4 cps/cm 2，对杂散磁场的耐受性高达120 G。该探测器在所使用的操作条件下表现出稳定的性能，例如400天以上的稳定计数率和在20 °C左右的计数温度系数为− 0.01至0.02%/°C。检测器系统及其性能指标与具体的检测器设计一起提出。
The detector system ofSENJU—a single-crystal time-of-flight neutron diffractometer—is described.SENJUis the first diffractometer employing a large-area two-dimensional wavelength-shifting fiber-based scintillator detector at the Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex. Thirty-seven detectors were installed in the instrument to cover a scattering angle of 30%. The detector modules exhibited a detector efficiency of 37–47ą1% (meanąstandard deviation) for thermal neutrons, a60Co gamma-ray sensitivity of 1.4–5.1ą0.1Ũ10−6, a background count rate of 2.1–3.8ą1.0Ũ10−4cps/cm2and a tolerance to stray magnetic fields up to 120 G. The detector exhibited stable performance under the operating conditions used, such as stable count rates over 400 days and a count temperature coefficient of −0.01ą0.02%/°C at around 20 °C. The detector system and its performance metrics are presented together with the specific detector design.