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

项目名称：WIMP暗物质直接探测实验（CDMS）超导电子读出系统摘要：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的，而是以某种黑暗的形式存在。破译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。如果是这样的话，那么我们银河系中存在的大质量弱相互作用大质量粒子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设备来搜索核上罕见的wimp散射，并将它们与背景相互作用区分开来。该奖项将为UCD小组提供支持，与最初的SuperCDMS项目赠款一起，将使(a)完成CDMSII实验，该实验已在Soudan矿山完全构建并获取科学数据，(b)在Soudan对两座新的超级塔进行测试和地下操作。每个项目包括六个下一代探测器和(c)长期研究和开发的适度努力，为可能的后续实验开发和测试新的硬件和探测器。具体来说，该提案将支持PI在CDMS项目中的活动，以及该小组长期开发和实施两级超导量子干涉装置（SQUID）前置放大器声子读出系统，并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，技术发展将推动声子介导探测器的发展，声子介导探测器在天体物理学中越来越有用，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。

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.