Helium Recovery & Reliquefaction For Low Temperature Research

氦气回收

• 批准号: 0963347
• 负责人: Jennifer Hoffman
• 金额: $ 130万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard 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=0963347&HistoricalAwards=false
• 关键词: Helium; Recovery; & Reliquefaction; Low

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This award will provide partial support for the completion of Harvard's helium recovery and reliquefaction infrastructure . The project includes helium gas recovery piping from a multi-user nuclear magnetic resonance facility and from the labs of 15 faculty members (8 physics, 3 engineering, and 4 chemistry), and the fixed equipment to collect, liquefy, and dispense the recovered helium. The project would also include HVAC, electrical, and control infrastructure required for operation.Helium is used extensively in physics, engineering, chemistry, and biology research whenever cold environments are needed for experiments or detectors. Current and future research activities include making accurate measurement of the electron magnetic moment and the fine structure constant, and the most stringent test of charge-parity-time symmetry with leptons; using helium as a buffer gas to cool new atoms and molecules into Bose-Einstein condensates and quantum Fermionic systems; providing cooling for studies of the electronic orders in exotic correlated electron materials such as high-Tc superconductors and graphene; allowing access to the quantized energy levels in nanostructures fabricated from materials such as GaAs, carbon nanotubes, graphene, and diamond; and permitting diagnostics such as nuclear magnetic resonance, Mossbauer spectroscopy, and scanning tunneling spectroscopy of newly synthesized molecules and catalysts.Each year, over 300 students and postdocs will be working on research projects in physics, chemistry, and materials science that involve liquid helium. The liquefier would conserve helium, a precious nonrenewable resource, and would consume approximately one-fifth the electricity of alternative technologies such as pulse tube refrigerators.

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。该奖项将为哈佛氦回收和再液化基础设施的完成提供部分支持。 该项目包括从多用户核磁共振设施和15名教职员工（8名物理，3名工程和4名化学）的实验室中回收氦气的管道，以及收集，储存和分配回收氦气的固定设备。该项目还将包括运行所需的暖通空调、电气和控制基础设施。氦广泛用于物理、工程、化学和生物学研究，无论是实验还是探测器都需要寒冷的环境。 目前和未来的研究活动包括精确测量电子磁矩和精细结构常数，以及与轻子的电荷-宇称-时间对称性的最严格测试;使用氦作为缓冲气体将新的原子和分子冷却成玻色-爱因斯坦凝聚体和量子费米系统;为研究诸如高温超导体和石墨烯等奇异相关电子材料中的电子序提供冷却;允许访问由诸如GaAs、碳纳米管、石墨烯和金刚石的材料制造的纳米结构中的量子化能级;并允许诊断，如核磁共振，穆斯堡尔光谱学，和扫描隧道光谱学的新合成的分子和催化剂。每年，三百多名学生和博士后将从事涉及液氦的物理，化学和材料科学的研究项目。该净化器将保存氦，一种珍贵的不可再生资源，并将消耗大约五分之一的电力替代技术，如脉冲管制冷机。