P型点接触锗探测器的本征空间位置分辨率
Intrinsic Spatial Position Resolution of P-type Point-Contact Germanium Detector
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中文总结 AI 辅助
研究针对P型点接触锗探测器，依靠优化方法和物理框架，提取脉冲形状响应，定量评估本征空间位置分辨率，构建数据库实现背景位置追踪，建立物理分析闭环，为未来背景分析提供支持。
中文摘要 AI 辅助
P型点接触锗探测器已成为直接暗物质搜索和无中微子双β衰变等稀有事件实验的理想探测技术，并已被证实能够实现单点位空间位置分辨率。准确表征探测器与位置相关的脉冲形状响应是深化背景理解和实现背景降低的关键前提。本研究依靠优化的交叉扫描定位方法和全链物理框架，提取了CDEX探测器关键区域的脉冲形状响应，首次定量评估其本征空间位置分辨率，最终利用构建的脉冲形状数据库实现真实环境背景的位置追踪。本研究完全建立了空间位置分辨率的物理分析闭环，为未来吨级阵列的背景分析提供了关键的理论和技术支持。
英文摘要
The p-type point-contact germanium detectors have emerged as the ideal detection technology for rare-event experiments such as direct dark matter searches and neutrinoless double beta decay, and have been verified to be capable of single-site spatial position resolution. Accurately characterizing the position-dependent pulse shape responses of the detector is a crucial prerequisite for deepening background understanding and achieving background reduction. Relying on an optimized cross-scanning localization method and a full-chain physical framework, this study extracted the pulse shape responses in critical regions of the CDEX detector, quantitatively evaluated its intrinsic spatial position resolution for the first time, and ultimately achieved the position tracing of real environmental backgrounds using the constructed pulse shape database. This study completely establishes a physical analysis closed-loop for spatial position resolution, providing critical theoretical and technical support for background analysis in future ton-scale arrays.
