Acquisition of a Helium Liquefier

购置氦液化器

• 批准号: 9802872
• 负责人: Allen Goldman
• 金额: $ 15.19万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-15 至 2000-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9802872&HistoricalAwards=false
• 关键词: Acquisition; Helium; Liquefier

9802872GoldmanThis award provides partial support to replace a Helium Liquefier module operated for the last 20 years by the School of Physics and Astronomy at the University of Minnesota, and to refurbish two series 1400 compressors. The system will be used to supply liquid helium to the Condensed Matter Physics Group, and to other research groups outside of Physics at the University of Minnesota. In the Condensed Matter Physics Group research dependent on the availability of liquid helium, includes programs on "Pairing Spectroscopy of Exotic Superconductors," "Magnetic Superconductor Interface Structures and High Temperature Superconducting Compounds," "Tunneling and Transport in Ordered and Disordered Superconductors," "Phase Slip in Superfluid 4He Flow through Microscopic Apertures," "Magnetization Reversal in Magnetic Particles: Classical and Quantum Regimes," "Ultra-low Temperature Properties of Metals," and "Quantum Phase Transition in Low-Dimensional Systems." Users outside Condensed Matter include the Astronomy Department, which has a program of Infrared Astronomy with a telecope situated at Marine on St. Croix, east of the Twin Cities, the Chemistry, Biochemistry (College of Biological Sciences and Medical School), Medicinal Chemistry, and Radiology Departments. The latter organizations support a large number of NMR facilities, and several small-scale MRI setups. Additional users are in Electrical Engineering and Geology. The work in Electrical Engineering is focused on Shubnikov-de Haas studies of semiconducting materials, and that in Geology with magnetic minerals and magnetotactic bacteria. Approximately 42 faculty, 40 post doctorals, 62 graduate students, 26 undergraduates, in more than nine disciplines/departments will benefit.%%%***

9802872戈德曼该奖项提供部分支持，以取代过去20年来由明尼苏达大学物理和天文学院运行的氦液化器模块，并重新安装两个1400系列压缩机。 该系统将用于向凝聚态物理组和明尼苏达大学物理学以外的其他研究组提供液氦。 在凝聚态物理组的研究依赖于液态氦的可用性，包括“外来超导体的配对光谱学”，“磁性超导体界面结构和高温超导化合物”，“有序和无序超导体中的隧穿和传输”，“超流体4 He流通过微观结构的相位滑移”，“磁性粒子中的磁化抑制：古典与量子体系”、“金属的超低温性质”、“低维系统的量子相变”。“凝聚态物质以外的用户包括天文学系，它有一个红外天文学计划，位于双子城以东的圣克鲁瓦海洋，化学，生物化学（生物科学学院和医学院），药物化学和放射学系。 后者的组织支持大量的核磁共振设施，和几个小规模的核磁共振设置。 其他用户为电气工程和地质学。 电气工程的工作主要集中在半导体材料的Shubnikov-de哈斯研究，以及磁性矿物和趋磁细菌的地质学研究。 大约42名教师，40名博士后，62名研究生，26名本科生，超过9个学科/部门将受益。