SuperCDMS Operation at Soudan

苏丹 SuperCDMS 运行

• 批准号: 1004714
• 负责人: Bernard Sadoulet
• 金额: $ 115.42万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-10-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1004714&HistoricalAwards=false
• 关键词: SuperCDMS; Operation; 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 distinguish them from backgrounds. This powerful technology is operating deep underground in the Soudan mine in Minnesota. This award will support the CDMS scientists to test and commission five SuperCDMS Super-Towers with a total mass of 15 kg. This project is also an important step to demonstrate the viability of germanium cryogenic detectors for a future larger mass experiment at SNOLAB. The SuperCDMS Soudan experiment is being constructed and operated by the SuperCDMS collaboration which is comprised of fifteen institutions. Broader impacts: the experiment will have a broad impact which extends beyond the dark matter search. The technical development 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 students, and postdoctoral researchers, using techniques at the leading edge of measurement technologies. In addition, the collaboration will expand its public outreach program at the Soudan mine. SuperCDMS scientists will continue their involvement in K-12, their collaboration with teachers and their support for promising high school students from underserved backgrounds.

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构成的。破译这种暗物质的本质对宇宙学、天体物理学和高能粒子物理学具有根本性的重要性。一个主要的假设是，它是由大爆炸后瞬间产生的弱相互作用大质量粒子（wimp）组成的。如果wimp是暗物质，那么它们在我们星系中的存在可能会通过地球探测器的原子核散射而被探测到。低温暗物质搜索（CDMS）合作率先使用低温声子介导的探测器来探测核上罕见的wimp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的苏丹矿的地下深处运作。该奖项将支持CDMS科学家测试和委托5座总质量为15公斤的超级CDMS超级塔。该项目也是证明锗低温探测器未来在SNOLAB进行更大规模实验的可行性的重要一步。苏丹的超级cdms实验是由由15个机构组成的超级cdms合作组织建造和操作的。更广泛的影响：该实验将产生广泛的影响，其范围将超出暗物质搜索。这项技术的发展将进一步推动声子介导探测器的发展，声子介导探测器已经在宇宙学、天文学和工业中得到了许多应用。该项目将有助于培养学生和博士后研究人员，使用最前沿的测量技术。此外，该合作将扩大其在苏丹矿山的公共宣传方案。SuperCDMS的科学家们将继续参与K-12，他们与教师的合作，以及他们对来自缺乏教育背景的有前途的高中生的支持。