SuperCDMS SNOLAB Pre-Operations

天体物理观测和宇宙学数据提供了强有力的证据，表明近四分之一的宇宙由暗物质组成。弱相互作用大质量粒子(WIMP)和轴子被认为是暗物质理论上最受欢迎的候选者。这项为期一年的奖励支持一项实验的初步活动，该实验可能以一种补充大型强子对撞机的方式解决暗物质的性质，间接探测实验，以及将搜索WIMP的LZ和XENONnT等直接探测实验。超级CDMS SNOLAB合作正在计划一项新的实验，配备先进的低温探测器，对GeV/c^2及以下质量的暗物质粒子具有前所未有的灵敏度。这项实验计划在加拿大的SNOLAB进行。该实验的声子中介探测器在宇宙学、天文学和工业中都有应用。该项目还将使私人投资机构能够通过短期课程单元、研究项目和讲习班将计算技能融入其现有的外展工作中。此外，通过这些资金，这些团体将通过增加对旅游团和SNOLAB现场展览的参与来利用SNOLAB外展团队。最重要的外展目标是在追求科学职业的本科生数量上产生显著的、不可能的和公平的影响。fi。他们建议(1)进一步开发这种可访问的分析环境，(2)使用JupyterHub环境开发关于关键数据分析技能的简短教程。2019年5月，CUT设施--一个新的低温地下测试设施--直接毗邻SuperCDMS SNOLAB实验场，因此不受宇宙射线的影响--完工。合作将利用这一低背景测试设施进行一系列电子和环境噪声表征和缓解活动，以及对偏置电压、电荷泄漏和能量校准的系统研究，以优化探测器的性能和操作方案。这项工作包括对电子、DAQ、数据质量以及计算和软件子系统进行早期测试，从GE HV探测器开始进行端到端的探测器数据读取和处理，GE HV探测器是2019年交付的第一个测试探测器。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Astrophysical observations and cosmological data give strong evidence that nearly a quarter of the Universe consists of dark matter. Weakly interacting massive particles (WIMPs) and axions have been proposed as theoretically favored candidates for dark matter. This one-year award supports preliminary activities for an experiment that could address the nature of dark matter in a way that is complementary to the Large Hadron Collider, indirect detection experiments, and direct detection experiments like LZ and XENONnT that will search for WIMPs. The SuperCDMS SNOLAB Collaboration is planning a new experiment equipped with advanced cryogenic detectors that have unprecedented sensitivity to dark matter particles with masses at and below the GeV/c^2 scale. The experiment is planned to be sited in SNOLAB in Canada. The experiment’s phonon-mediated detectors have applications in cosmology, astronomy, and industry. This project will also allow the PIs to build computational skills into their existing outreach efforts through short course modules, research projects, and workshops. In addition, through these funds, the groups will leverage the SNOLAB outreach team by increasing participation in tour groups and SNOLAB on-site exhibits. The overarching outreach goal is to make a significant and equitable impact in the number of undergraduate students who pursue science careers. They propose to (1) further develop this accessible analysis environment and (2) develop short tutorials on critical data-analysis skills using the JupyterHub environment.In May 2019, the CUTE facility — a new cryogenic underground test facility located directly adjacent to the SuperCDMS SNOLAB experiment site and thus shielded from cosmic rays — was completed. The Collaboration will use this low-background testing facility to conduct a series of electronic and environmental noise characterization and mitigation campaigns, as well as systematic studies of bias voltage, charge leakage, and energy calibration to optimize detector performance and operating protocols. This work includes early testing of the electronics, DAQ, data-quality, and computing and software subsystems, exercising end-to-end readout and processing of detector data, starting with a Ge HV detector — the first test detector delivered in 2019.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.