基于信号幅度的^(3)He管中子探测器刻度算法优化研究

Optimization Research of Amplitude-based Calibration Algorithm for 3He Tube Neutron Detector

本研究针对中国散裂中子源下的高压中子衍射谱仪中核心组件——位置灵敏型^(3)He管中子探测器的刻度问题进行了深入探究。通过实验验证和理论分析,揭示了传统刻度方法中未考虑到的中子信号幅度对刻度参数的影响,以及由此产生的位置分布畸变和空间分辨率降低的问题。为解决这些问题,本研究提出了一种改进的刻度算法,该算法能够有效地考虑中子信号幅度的变化,从而显著改善了探测器系统的空间分辨能力。经过实验结果分析显示,新的刻度算法不仅消除了位置分布的拖尾现象,而且提高了不同位置处的空间分辨率,与理论预期相符。本研究的成果为高压中子衍射谱仪在极端条件下的应用提供了重要的技术支持,并为进一步优化中子探测器的刻度方法和提高中子衍射技术的应用精度奠定了基础。

This study focuses on the calibration issues of the position-sensitive 3He tube neutron detector,which is a core component of the high-pressure neutron diffractometer under the Chinese Spallation Neutron Source.Through experimental validation and theoretical analysis,it reveals the influence of neutron signal amplitude,which has been overlooked in traditional calibration methods,on calibration parameters,leading to distortions in position distribution and reduced spatial resolution.To address these issues,an improved calibration algorithm is proposed in this study,which effectively considers the variations in neutron signal amplitude,thereby significantly improving the spatial resolution capability of the detector system.Experimental results analysis demonstrates that the new calibration algorithm not only eliminates the tailing effect in the position distribution but also enhances the spatial resolution at different positions,consistent with theoretical expectations.The findings of this study provide important technical support for the application of high-pressure neutron diffractometers under extreme conditions,and lay the foundation for further optimization of neutron detector calibration methods and improvement of the application accuracy of neutron diffraction techniques.