Hunting keV sterile neutrinos with KATRIN: building the first TRISTAN module

用于KATRIN实验搜寻keV量级惰性中微子的硅漂移探测器阵列的研制

Development of a Silicon Drift Detector Array to Search for keV-scale Sterile Neutrinos with the KATRIN Experiment

为通过KATRIN实验高灵敏度搜寻keV量级暗物质候选惰性中微子，研究人员研制了新型TRISTAN多像素硅漂移探测器焦平面阵列，并测试了其单模块的噪声、能量分辨率等光谱学性能。

用于以电子表征硅漂移探测器的热离子电子枪

A thermionic electron gun to characterize silicon drift detectors with electrons

本文开发了基于热离子发射的定制电子枪，用于在安装前以单能电子表征KATRIN实验中TRISTAN硅漂移探测器，概述了其设计、调试及首次测量结果。

Characterization measurements of the TRISTAN multi-pixel silicon drift detector

Sterile neutrinos are a minimal extension of the Standard Model of Particle Physics. A laboratory-based approach to search for this particle is via tritium beta-decay, where a sterile neutrino would cause a kink-like spectral distortion. The Karlsruhe Tritium Neutrino (KATRIN) experiment extended by a multi-pixel Silicon Drift Detector system has the potential to reach an unprecedented sensitivity to the keV-scale sterile neutrino in a lab-based experiment. The new detector system combines good spectroscopic performance with a high rate capability. In this work, we report about the characteriz…

用KATRIN实验研制无菌中微子探测器

Detector Development for a Sterile Neutrino Search with the KATRIN Experiment

KATRIN（卡尔斯鲁厄氚中微子）实验研究氚$β$ -衰变谱的能量终点，以确定电子反中微子的有效质量，精度为$200\,\mathrm{meV}$（$90\,\%$ C.L.）经过三年的有效数据采集。TRISTAN（氚$β$ -衰变寻找无菌中微子）小组的目标是通过使用升级的KATRIN系统测量整个氚$β$ -衰变光谱来检测无菌中微子签名。最大的挑战之一是处理KATRIN氚源的强活性所产生的高信号速率。因此，正在设计一种新型的多像素硅漂移探测器，其能够处理高达$10^{8}\,\mathrm{cps}$的速率，在$10\,\mathrm{keV}$处具有$<200\,\mathrm{eV}$（FWHM）的优异能量分辨率。这项工作给出了一个正在进行的探测器的开发和测试结果的第一个七像素原型探测器的概述。

KATRIN寻找keV-scale不育中微子的新型探测器系统

A novel detector system for KATRIN to search for keV-scale sterile neutrinos

惰性中微子是粒子物理学标准模型的最小扩展。如果它们的质量在千电子伏特范围内，它们就是可能的暗物质候选者。在实验室实验中寻找无菌中微子的一种方法是通过氚β衰变，其中新的中微子质量本征态将表现为$β$衰变谱的扭结状扭曲。TRISTAN项目的目标是用一个新的多像素硅漂移探测器系统来扩展KATRIN装置，以寻找keV级的无菌中微子信号。在本文中，我们描述了这样一个新的探测器的要求，并提出了第一个表征测量结果与7像素的原型系统。

Characterization of Silicon Drift Detectors with Electrons for the TRISTAN Project

Sterile neutrinos are a minimal extension of the Standard Model of Particle Physics. A promising model-independent way to search for sterile neutrinos is via high-precision beta spectroscopy. The Karlsruhe Tritium Neutrino (KATRIN) experiment, equipped with a novel multi-pixel silicon drift detector focal plane array and read-out system, named the TRISTAN detector, has the potential to supersede the sensitivity of previous laboratory-based searches. In this work we present the characterization of the first silicon drift detector prototypes with electrons and we investigate the impact of uncert…