创新量热器的安装：一种基于重力的方法
Innovating Bolometers' Mounting: A Gravity-Based Approach
AI总结：
CUPID合作组提出仅靠重力固定堆叠配置量热器的创新方法，通过中型原型机测试验证了其在热稳定性、能量分辨率和光产额上均满足实验需求。
摘要：
低温量热器，也称为量热器，是搜索稀有事件的领先技术之一。CUPID实验正在利用该技术部署吨级探测器，以搜索$^{100}$Mo的无中微子双beta衰变。CUPID合作组提出了一种创新方法，即将量热器以堆叠配置组装，仅靠重力固定位置。这种基于重力的组装方法在量热器领域是史无前例的，并具有多项优势，包括放宽的机械公差和简化的构建过程。为了评估和优化其性能，我们构建了一个中型原型机，包含28个Li$_2$MoO$_4$晶体和30个Ge光探测器，两者均在Gran Sasso国家实验室（意大利）作为低温量热器运行。尽管光探测器出现了意外的额外噪声，但该测试结果证明了：在10 mK下热稳定性优于$\pm$0.5 mK；Li$_2$MoO$_4$量热器具有良好的能量分辨率，在2615 keV处FWHM为(6.6 $\pm$ 2.2) keV；由最近的光探测器测得的Li$_2$MoO$_4$光产额为0.36 keV/MeV，足以保证CUPID所需的粒子鉴别。
英文摘要：
Cryogenic calorimeters, also known as bolometers, are among the leading technologies for searching for rare events. The CUPID experiment is exploiting this technology to deploy a tonne-scale detector to search for neutrinoless double-beta decay of $^{100}$Mo. The CUPID collaboration proposed an innovative approach to assembling bolometers in a stacked configuration, held in position solely by gravity. This gravity-based assembly method is unprecedented in the field of bolometers and offers several advantages, including relaxed mechanical tolerances and simplified construction. To assess and optimize its performance, we constructed a medium-scale prototype hosting 28 Li$_2$MoO$_4$ crystals and 30 Ge light detectors, both operated as cryogenic calorimeters at the Laboratori Nazionali del Gran Sasso (Italy). Despite an unexpected excess of noise in the light detectors, the results of this test proved (i) a thermal stability better than $\pm$0.5 mK at 10 mK, (ii) a good energy resolution of Li$_2$MoO$_4$ bolometers, (6.6 $\pm$ 2.2) keV FWHM at 2615 keV, and (iii) a Li$_2$MoO$_4$ light yield measured by the closest light detector of 0.36 keV/MeV, sufficient to guarantee the particle identification requested by CUPID.
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