SGER: A Multi-User Neutron Diffractometer: Conceptual Design

SGER：多用户中子衍射仪：概念设计

• 批准号: 9811897
• 负责人: Stephen White
• 金额: $ 3万
• 依托单位: University of California-Irvine
• 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: 1998-09-15 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9811897&HistoricalAwards=false
• 关键词: SGER; Multi; User; Neutron; Diffractometer

The objectives of this project are to (1) develop a conceptual design for a single-circle neutron diffractometer/reflectometer for structural studies of membrane and other partially ordered interfacial systems to be operated at Center for Neutron Research at the National Institute of Standards and Technology, (2) determine the cost of the construction of the diffractometer, and (3) develop a plan for the construction and operation of the diffractometer through a multi-agency funding mechanism. A Planning Group comprised of experts in neutron diffraction and reflectometry and neutron instrumentation has been assembled to accomplish these objectives. The funds requested will be used to support the Planning Group's activities in the pursuit of the objectives. Neutron diffraction has unique capabilities for structural studies of diverse biological and physical systems. There is presently a world-wide shortage of neutron facilities, especially for studies of membrane and other interfacial systems. The only membrane diffractometer in the United States is located at Brookhaven National Laboratory's High Flux Beam Reactor (HFBR), which was recently shut down for an indefinite period of time. Even if the HFBR restarts in the next several years, there is a need for a second diffractometer in order to meet the rising demand for neutron instruments as well as to assure an uninterrupted supply of neutrons for membrane structural studies. The proposed instrument at NIST will be designed to have significantly better capabilities than existing instruments and will be the first membrane diffractometer that uses a cold-neutron source.

该项目的目标是（1）开发单圆中子衍射仪/反射仪的概念设计，用于在美国国家标准与技术研究院中子研究中心运行的膜和其他部分有序界面系统的结构研究，（2）确定衍射仪的建造成本，以及（3）通过多机构资助机制制定衍射仪的建造和运行计划。一个由中子衍射和反射测量以及中子仪器方面的专家组成的规划小组已经成立，以实现这些目标。 所请求的资金将用于支持规划小组为实现目标而开展的活动。 中子衍射对于不同生物和物理系统的结构研究具有独特的能力。目前全世界都缺乏中子设施，特别是用于膜和其他界面系统研究的中子设施。 美国唯一的膜衍射仪位于布鲁克海文国家实验室的高通量束反应器（HFBR），该反应器最近被无限期关闭。即使 HFBR 在未来几年内重新启动，也需要第二台衍射仪，以满足对中子仪器不断增长的需求，并确保不间断地供应用于膜结构研究的中子。 NIST 拟议的仪器将被设计为具有比现有仪器更好的功能，并且将是第一个使用冷中子源的膜衍射仪。