Readout Systems for Cryogenic Dark Matter Detectors

低温暗物质探测器的读出系统

• 批准号: 1408414
• 负责人: Martin Huber
• 金额: $ 14.89万
• 依托单位: University of Colorado at Denver-Downtown Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-15 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1408414&HistoricalAwards=false
• 关键词: Readout; Systems; Cryogenic; Dark; Matter

Multiple astronomical observations have established that about 85% of the matter in the universe is not made of known particles. Deciphering the nature of this so-called Dark Matter is of fundamental importance to cosmology, astrophysics, and high-energy particle physics. A leading hypothesis is that it is comprised of Weakly Interacting Massive Particles, or WIMPs, that were produced moments after the Big Bang. If WIMPs are the dark matter, then their presence in our galaxy may be detectable via scattering from atomic nuclei in detectors located deep underground to help reject backgrounds due to cosmic rays.The Cryogenic Dark Matter Search (CDMS) Collaboration has pioneered the use of low temperature phonon-mediated detectors to detect the rare scattering of WIMPs on nuclei and distinguish them from backgrounds. This work will have a broad impact which extends beyond the dark matter search. The technical developments will further advance phonon-mediated detectors, which have already found many applications in science and technology.This program, working with techniques on the leading edge of measurement technology, supports education and training of physics and electrical engineering undergraduate students in the PI's group, a diverse body including non-traditional and first-generation college students, as well as students from groups underrepresented in STEM disciplines. The PI participates in the CU Denver's Mini-STEM school, the local Caf´e Scientifique, and a field trip program at a local K-8 magnet school.This award will enable the PI and his students to fulfill specific responsibilities for both SuperCDMS Soudan and SuperCDMS SNOLAB projects, including operations support for SuperCDMS Soudan, superconducting quantum interference device (SQUID) characterization and testing for SNOLAB, and support during construction and initial commissioning. Planned activities also include a modest R&D effort toward multiplexed SQUID readout, required for the next-generation dark matter direct detection efforts.

多项天文观测已证实，宇宙中约 85% 的物质不是由已知粒子构成的，破译这种所谓的暗物质的本质对于宇宙学、天体物理学和高能粒子物理学具有重要意义。假设它是由大爆炸后不久产生的弱相互作用大质量粒子（WIMP）组成的。如果 WIMP 是暗物质，那么它们可能存在于我们的星系中。可以通过位于地下深处的探测器中原子核的散射来检测，以帮助排除宇宙射线造成的背景。低温暗物质搜索 (CDMS) 合作组织率先使用低温声子介导的探测器来探测原子核和原子核上罕见的 WIMP 散射。这项工作将产生广泛的影响，超出暗物质搜索范围，技术发展将进一步推进声子介导的探测器，该探测器已经在科学和技术中得到了许多应用。该计划利用测量技术的前沿技术，支持 PI 群体中物理和电气工程本科生的教育和培训，PI 群体是一个多元化的群体，包括非传统大学生和第一代大学生，以及来自代表性不足群体的学生PI 参加 CU 丹佛的 Mini-STEM 学校、当地的 Caf´e Scientifique 以及当地 K-8 磁石学校的实地考察项目。该奖项将使 PI 和他的学生能够SuperCDMS Soudan 和 SuperCDMS SNOLAB 项目的具体职责，包括 SuperCDMS Soudan 的运营支持、SNOLAB 的超导量子干涉器件 (SQUID) 表征和测试，以及建设和初始调试期间的支持。 计划活动还包括对多路复用的适度研发工作。 SQUID 读出，是下一代暗物质直接探测工作所需的。