Development of a Filter-Analyzer Neutron Spectrometer at the National Institute of Standards and Technology

美国国家标准与技术研究院开发过滤分析中子能谱仪

• 批准号: 9512225
• 负责人: Michael Klein
• 金额: $ 74万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9512225&HistoricalAwards=false
• 关键词: Development; Filter; Analyzer; Neutron; Spectrometer

9512225 Klein A new, high intensity filter-analyzer neutron spectrometer (FANS) will be designed, constructed, and operated at the National Institute of Standards and Technology (NIST) by a consortium of scientists from the University of Pennsylvania, the University of California at Santa Barbara, NIST, Hughes Aircraft, DuPont, and Allied-Signal. The throughput and sensitivity of the new FANS will exceed by a factor of at least fifty that of a heavily oversubscribed prototype which is already unique in the US. When completed, FANS will be the most sensitive neutron spectrometer in the world for studies of vibrational modes in the 10-100 millielectron-volt range by inelastic scattering of neutrons. The FANS instrument will be used to study intra- and intermolecular vibrations in molecular crystals and liquids, polymers, guest-host systems such as hydrogen in metals and hydrocarbons in zeolites, to characterize novel forms of carbon such as fullerenes and tubules, and novel candidate molecules for environmentally safe refrigerants. %%% The development of the FANS will fill an urgent need of the country's scientific infrastructure. There are currently only two such instruments in the world, one in France and one prototype at NIST, and they are both heavily subscribed. The FANS will have a wide impact on molecular spectroscopy research, as current neutron facilities in the US are inadequate for studies of molecular dynamics. ***

由宾夕法尼亚大学、加州大学圣巴巴拉分校、NIST、休斯飞机公司、杜邦公司和联合信号公司的科学家组成的联盟将在美国国家标准与技术研究所（NIST）设计、建造和运行一种新型的高强度过滤分析器中子星（FANS）。新FANS的吞吐量和灵敏度将超过至少50倍的超额认购原型机，这在美国已经是独一无二的。完成后，FANS将成为世界上最灵敏的中子星，通过中子的非弹性散射来研究10-100百万电子伏特范围内的振动模式。FANS仪器将用于研究分子晶体和液体、聚合物、客体-宿主系统（如金属中的氢和沸石中的碳氢化合物）中的分子内和分子间振动，以表征富勒烯和小管等新型碳形式，以及用于环境安全制冷剂的新型候选分子。FANS的发展将填补国家科学基础设施的迫切需求。目前世界上只有两个这样的仪器，一个在法国，一个在NIST的原型，它们都被大量订购。FANS将对分子光谱研究产生广泛的影响，因为目前美国的中子设施不足以研究分子动力学。＊＊＊