Acquisition of a Helium Liquefier

购置氦液化器

基本信息

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

项目摘要

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 Goldmanthis奖提供了部分支持，以取代明尼苏达大学物理与天文学学院在过去20年中运行的氦气液化模块，并翻新两个1400系列压缩机。该系统将用于向凝聚态物理小组以及明尼苏达大学物理学以外的其他研究小组提供液体氦气。在凝聚的物理小组研究中，取决于液体氦的可用性，包括有关“配对外来超导体配对”的程序，“磁性超导体界面结构和高温超导化合物，“隧穿和运输”，以有序和无序的超导导体在超级范围内进行磁性映射，“”经典和量子状态，“金属的超低温度特性”和“低维系统中的量子相变”。外面凝结问题的用户包括天文学部，该部门拥有一项红外天文学计划，其电信位于双城以东的圣克鲁瓦，化学，生物化学（生物科学和医学院），药物化学和放射学部门。后者组织支持大量的NMR设施和几个小规模的MRI设置。其他用户在电气工程和地质学中。电气工程中的工作集中在半导体材料的Shubnikov-de HAAS研究上，以及具有磁性矿物质和磁性细菌的地质学。大约有42位教职员工，40名邮政博士，62名研究生，26名本科生，在9个学科/部门中将受益。%%％***