DEVELOPMENT OF PULSED 35GHZ FT ESR SPECTROMETER

脉冲 35GHZ FT ESR 光谱仪的开发

• 批准号: 8363936
• 负责人: Jack H Freed
• 金额: $ 3.98万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8363936
• 关键词: Amplifiers; Development; Engineering; Funding; Grant; National Center for Research Resources; Physiologic pulse; Principal Investigator; Research; Research Infrastructure; Resources; Running; Scheme; Source; Staging; System; Technology; Time; Travel; Tube; United States National Institutes of Health; Work; base; cost; heterodyning; research study

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. In our original plans, the 35 GHz was planned as a heterodyne- scheme-based add-on to the 8-18 GHz spectrometer. As a simple add-on feature, the 35 GHz spectrometer would have been a much less time and resource intrusive compared to a separate, dedicated, spectrometer built from scratch. The key component is the 35 GHz 800 W traveling-wave tube amplifier (TWTA), which was supplied by Applied Systems Engineering, Inc. The second key component is a receiver protector, of which a most important low-power active stage was completed in a separate subproject. The decision was made, however, to build the 35 GHz pulse bridge as a stand-alone module as a matter of operational convenience so that experiments at 8-18 GHz could be run independently. This will require adding several components, including sources, to complete the free-standing 35 GHz bridge. This work is in progress.

这个子项目是利用资源的许多研究子项目之一。 由NIH/NCRR资助的中心拨款提供。对子项目的主要支持 子项目的首席调查员可能是由其他来源提供的， 包括美国国立卫生研究院的其他来源。为子项目列出的总成本可能 表示该子项目使用的中心基础设施的估计数量， 不是由NCRR赠款提供给次级项目或次级项目工作人员的直接资金。 在我们最初的计划中，35 GHz被规划为8-18 GHz光谱仪的基于外差方案的附加组件。作为一个简单的附加功能，与从头开始建造的单独的专用光谱仪相比，35 GHz光谱仪的时间和资源侵入性要小得多。关键部件是由应用系统工程公司提供的35 GHz 800W行波管放大器(TWTA)。第二个关键部件是接收机保护器，其中最重要的低功耗有源部分在单独的子项目中完成。然而，为了操作方便，决定将35 GHz的脉冲桥作为一个独立的模块来建造，以便8-18 GHz的实验可以独立进行。这将需要添加几个组件，包括源，以完成独立的35 GHz桥。这项工作正在进行中。