Superconducting Electronics Readout Systems for WIMP Dark Matter Direct Detection Experiments (CDMS)

建议编号：0801708INSTUTUTION：科罗拉多大学丹佛NSF项目：PHY-粒子ASTROPHYSICSPRINCIPAL研究员：Huber，Martin E.Title：WIMP暗物质直接探测实验(CDMS)的超导电子读出系统ABSTRACT天文观测告诉我们，宇宙中大约85%的物质不是由普通粒子组成，而是以某种暗形式存在。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重要意义。一个主要的假设是，它是由相互作用很弱的大质量粒子组成的，这些粒子是在大爆炸后不久产生的。如果是这样的话，那么我们银河系中WIMP的存在可能是通过地面探测器中原子核的散射来检测到的。低温暗物质搜索(CDMS)合作开创了使用低温声子介导的设备来搜索WIMP在原子核上的罕见散射并将它们与背景相互作用区分开来的先河。该奖项为UCD集团提供支持，与最初的SuperCDMS项目赠款一起，将使(A)完成CDMSII实验，该实验已在苏丹矿全面建造并获得科学数据，(B)在苏丹矿测试和地下作业两个新的超级铁塔，？每个探测器包括六个下一代探测器和(C)为可能的后续实验开发和测试新硬件和探测器的远程研究和开发的适度努力。具体地说，这项建议将支持PI在CDMS项目中的活动，以及集团长期开发和实施两级超导量子干涉器件(SQUID)前置放大器声子读出系统，以及为未来的探测器技术开发基于SQUID的电离读出系统。作为该计划更广泛影响的一部分，技术开发将推动声子中介探测器的发展，从光学天文学到X射线和宇宙微波背景研究，以及量子计算等其他物理学分支，声子介导的探测器在天体物理学中的用途越来越大。

PROPOSAL NUMBER: 0801708INSTITUTION: University of Colorado DenverNSF PROGRAM: PHY - PARTICLE ASTROPHYSICSPRINCIPAL INVESTIGATOR: Huber, Martin E.TITLE: Superconducting Electronics Readout Systems for WIMP Dark Matter Direct Detection Experiments (CDMS) ABSTRACTAstronomical observations tell us that approximately 85% of the matter in the universe is not made of ordinary particles, but exists in some dark form. Deciphering the nature of this 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 so, then the presence of WIMPs in our Milky Way 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 devices to search for the rare scattering of WIMPs on nuclei and to distinguish them from background interactions. This award provides support for the UCD group that, in conjunction with the initial SuperCDMS project grants, will enable (a) the completion of the CDMSII experiment, which is fully constructed and acquiring science data at the Soudan Mine, (b) the testing and underground operation at Soudan of two new ?SuperTowers,? each comprised of six next-generation detectors and (c) a modest effort of long-range research and development to develop and test new hardware and detectors for possible followup experiments. Specifically, this proposal will support the PI's activities in the CDMS projects as well as the group's long-term development and implementation of a two-stage superconducting quantum interference device (SQUID) pre-amplifier phonon-readout system and development of a SQUID-based ionization-readout system for future detector technology. As part of the Broader Impacts of this program, the technical development will push the envelope of phonon-mediated detectors, which have increasing utility in astrophysics, from optical astronomy to x-rays and cosmic microwave backgrounds studies, as well as other branches of physics such as quantum computing.