标题： 能量为30 eVee的电离能量分辨率首次使用Ricochet锗低温热电bolometers得到证明 显示英文标题

标题： First demonstration of 30 eVee ionization energy resolution with Ricochet germanium cryogenic bolometers

摘要： Ricochet未来实验旨在通过精确测量来自反应堆反中微子的相干弹性中微子核散射过程，来探索电弱相互作用领域的新的物理现象，其精度可达亚100电子伏特的核反冲能量范围。 尽管Ricochet合作组目前正在反应堆现场搭建实验装置，但他们也在最终确定计划于2024年初集成到格勒诺布尔Institut Laue Langevin（ILL）低温恒温器中的低温探测器阵列。 本文报告了锗低温探测器技术——CryoCube的最新进展。 更具体地说，我们展示了早期设计版本的探测器组件及其专用高电子迁移率晶体管（HEMT）前置电子学所实现的30电子伏特电子当量（eVee）基线电离分辨率（RMS）。这比EDELWEISS和SuperCDMS暗物质实验中类似热电与电离型锗低温探测器获得的最佳电离分辨率提高了整整一个数量级，并且比首次完全低温HEMT前置放大器耦合到CDMS-II锗探测器时的表现提升了三倍。 此外，我们还讨论了这些结果对未来Ricochet实验及其预期背景抑制性能的影响。 显示英文摘要

摘要： The future Ricochet experiment aims to search for new physics in the electroweak sector by measuring the Coherent Elastic Neutrino-Nucleus Scattering process from reactor antineutrinos with high precision down to the sub-100 eV nuclear recoil energy range. While the Ricochet collaboration is currently building the experimental setup at the reactor site, it is also finalizing the cryogenic detector arrays that will be integrated into the cryostat at the Institut Laue Langevin in early 2024. In this paper, we report on recent progress from the Ge cryogenic detector technology, called the CryoCube. More specifically, we present the first demonstration of a 30~eVee (electron equivalent) baseline ionization resolution (RMS) achieved with an early design of the detector assembly and its dedicated High Electron Mobility Transistor (HEMT) based front-end electronics. This represents an order of magnitude improvement over the best ionization resolutions obtained on similar heat-and-ionization germanium cryogenic detectors from the EDELWEISS and SuperCDMS dark matter experiments, and a factor of three improvement compared to the first fully-cryogenic HEMT-based preamplifier coupled to a CDMS-II germanium detector. Additionally, we discuss the implications of these results in the context of the future Ricochet experiment and its expected background mitigation performance.