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基于闪器的Timepix3探测器用于使用强度调制的中子自旋回声技术

Fumiaki Funama¹, Su-Ann Chong¹, Matthew Loyd¹

¹Neutron Technologies Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.

The Review of scientific instruments

|March 19, 2024

概括

一个使用闪器的新Timepix3探测器被开发用于中子旋转回声实验. 它成功地解决了空间和时间领域的高频调制,用于先进的中子散射技术.

科学领域:

中子散射仪器仪表仪器仪表
探测器物理学的物理
材料科学是一种材料科学.

背景情况:

中子旋转回声 (NSE) 实验需要在空间和时间领域的高频分辨率.
现有的探测器在解决这些调制时面临诸如SEMSANS和MIEZE等技术的局限性.
开发先进的探测器对于推动中子散射研究的边界至关重要.

研究的目的:

开发和描述基于闪器的Timepix3 (TPX3) 探测器,用于高频中子束调制.
评估用于特定中子散射应用的6LiF:ZnS(Ag) 和6LiI:Eu闪器的性能.
为了确认探测器适用于旋回声调制小角度中子散射 (SEMSANS) 和零努力强度调制 (MIEZE) 技术.

主要方法:

使用闪器与图像增强器相结合,并使用Timepix3 (TPX3) 芯片进行中子检测.
研究了两个闪器:6LiF:ZnS(Ag) 和6LiI:Eu.
执行事件模式分析和优化聚类参数,以获得准确的数据.
检测器性能的特征包括效率,空间分辨率,计数速率,均性和玛射线灵敏度.

主要成果:

6LiF:ZnS(Ag) 闪器探测器实现了200μm的空间分辨率和1.1 × 10^5 cps的计数速度.
6LiI:Eu闪器探测器显示出250微米的空间分辨率和>2.9 × 10^5 cps计数速率.
在空间和时间领域成功观察到高频强度调制.

结论:

开发的基于闪电器的TPX3探测器满足了中子自旋回声实验中高频调制分辨率的要求.
两种研究的闪光灯都显示出对特定应用的希望,6LiI:Eu提供了更高的计数率.
该探测器被证实适用于先进的中子散射技术,如SEMSANS和MIEZE.

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