论文标题
一种新型的活动否决原型检测器，具有内在目标，可改善稀有事件搜索
A novel active veto prototype detector with an inner target for improved rare event searches
论文作者
论文摘要
我们报告了可以容纳内部目标探测器的环形，低温，声子介导的否决探测器的制造和性能，从而可以大大降低放射原性背景，以进行罕见的事件搜索实验。产生了元素$ \ sim $ \ sim $ 500 g，外径为76毫米，内径为28毫米的锗遗嘱探测器。直径为25毫米的元素内部目标探测器质量$ \ sim $ 10 g的否决探测器内。该检测器是使用基于GEANT4的模拟的输入设计的，在该模拟中将其建模为在两个锗探测器之间进行夹在两个。模拟表明，背景速率（主要是伽马相互作用）可以降低$> $ 90 $ \％$，并且这种安排足以用于中微子和暗物质搜索实验所需的积极背景降低。在实验地点进行测试期间，否决探测器原型在托管功能性内部目标检测器时达到了1.24 $ \ pm $ 0.02 keV的基线分辨率。内部目标检测器的基线分辨率为147 $ \ pm $ 2 ev。检测器在MK温度下运行。相同检测器排列的实验结果与模拟非常吻合。
We report the fabrication and performance of an annular, cryogenic, phonon-mediated veto detector that can host an inner target detector, allowing substantial reduction in radiogenic backgrounds for rare event search experiments. A germanium veto detector of mass $\sim$500 g with an outer diameter of 76 mm and an inner diameter of 28 mm was produced. A 25 mm diameter germanium inner target detector of mass $\sim$10 g was mounted inside the veto detector. The detector was designed using inputs from a GEANT4 based simulation, where it was modeled to be sandwiched between two germanium detectors. The simulation showed that the background rates (dominantly gamma interactions) could be reduced by $>$ 90$\%$, and that such an arrangement is sufficient for aggressive background reduction needed for neutrino and dark matter search experiments. During testing at the experimental site the veto detector prototype achieved a baseline resolution of 1.24 $\pm$ 0.02 keV while hosting a functional inner target detector. The baseline resolution of the inner target detector was 147 $\pm$ 2 eV. The detectors were operated at mK temperatures. The experimental results of an identical detector arrangement are in excellent agreement with the simulation.
