SuperCDMS Soudan

超级CDMS苏丹

• 批准号: 0902182
• 负责人: Bernard Sadoulet
• 金额: $ 153.11万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-10-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902182&HistoricalAwards=false
• 关键词: SuperCDMS; Soudan

Observations of galaxies, superclusters, distant supernovae, and the cosmic microwave background radiation tell us that about 85% of the matter in the universe is not made of known particles. Deciphering the nature of this dark matter would be 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 a terrestrial detector.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 to distinguish them from backgrounds. This powerful technology is operating deep underground in the Soudan mine in Minnesota. This award provides construction funding for the SuperCDMS Soudan project which will extend the deployed germanium target mass at Soudan from the present 4 kg to 15 kg. The SuperCDMS experiment 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 cosmology, astronomy and industry. The project will contribute to the training of undergraduate and graduate students, and postdoctoral researchers, using techniques at the leading edge of measurement technologies. In addition, the SuperCDMS collaboration will expand its public outreach program at the Soudan mine.

对星系、超星系团、遥远超新星和宇宙微波背景辐射的观测告诉我们，宇宙中大约85%的物质不是由已知粒子组成的。破译这种暗物质的本质对于宇宙学、天体物理学和高能粒子物理学至关重要。一个主要的假设是，它由大爆炸后不久产生的弱相互作用大质量粒子（WIMP）组成。如果 WIMP 是暗物质，那么它们在我们银河系中的存在可以通过地面探测器中原子核的散射来探测到。低温暗物质搜索 (CDMS) 合作组织率先使用低温声子介导探测器来探测 WIMP 在原子核上的罕见散射，并将它们与背景区分开来。这项强大的技术正在明尼苏达州苏丹矿井的地下深处运行。该奖项为 SuperCDMS Soudan 项目提供建设资金，该项目将使苏丹部署的锗目标质量从目前的 4 公斤扩大到 15 公斤。 SuperCDMS 实验将产生广泛的影响，超越暗物质搜索。技术的发展将进一步推动声子介导的探测器的发展，该探测器已经在宇宙学、天文学和工业领域得到了许多应用。该项目将利用测量技术的前沿技术，为本科生、研究生以及博士后研究人员的培训做出贡献。此外，SuperCDMS 合作还将扩大其在苏丹矿的公共推广计划。