论文标题
-18.6 kV延迟电压的宽带精度稳定katrin光谱仪
Wideband precision stabilization of the -18.6 kV retarding voltage for the KATRIN spectrometer
论文作者
论文摘要
Karlsruhe中微子实验（Katrin）测量了有效的电子抗神经质量，其前所未有的设计灵敏度为0.2 eV（90％C.L.）。在此实验中，用高度精确的光谱仪分析了tritium衰变端点附近的β电子的能量光谱。为了达到Katrin敏感性目标，该光谱仪的阻滞电压必须稳定至PPM水平，并且在各种时间尺度上（$μs$最多几个月）众所周知，其值约为-18.6 kV。定制设计的高压调节系统在没有封闭的大光谱仪容器周围没有封闭的电屏蔽层的情况下减轻干扰源的影响。在本文中，我们描述了调节系统及其在Katrin设置中的集成。独立的监测方法表明，超过Katrin的规格在2 ppm之内的稳定性。
The Karlsruhe Tritium Neutrino Experiment (KATRIN) measures the effective electron anti-neutrino mass with an unprecedented design sensitivity of 0.2 eV (90 % C.L.). In this experiment, the energy spectrum of beta electrons near the tritium decay endpoint is analyzed with a highly accurate spectrometer. To reach the KATRIN sensitivity target, the retarding voltage of this spectrometer must be stable to the ppm level and well known on various time scales ($μs$ up to months), for values around -18.6 kV. A custom-designed high-voltage regulation system mitigates the impact of interference sources in the absence of a closed electric shield around the large spectrometer vessel. In this article, we describe the regulation system and its integration into the KATRIN setup. Independent monitoring methods demonstrate a stability within 2 ppm, exceeding KATRIN's specifications.
