DEVELOPMENT OF PULSED 35GHZ FT ESR SPECTROMETER

这个子项目是许多利用资源的研究子项目之一 由NIH/NCRR资助的中心拨款提供。子项目的主要支持 而子项目的主要调查员可能是由其他来源提供的， 包括其它NIH来源。 列出的子项目总成本可能 代表子项目使用的中心基础设施的估计数量， 而不是由NCRR赠款提供给子项目或子项目工作人员的直接资金。 在我们最初的计划中，35 GHz被计划为8-18 GHz频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，与从头开始构建的单独专用光谱仪相比，35 GHz光谱仪占用的时间和资源要少得多。关键部件是35 GHz 800 W行波管放大器（TWTA），由应用系统工程公司提供。第二个关键部件是接收器保护器，其中最重要的低功率有源级在一个单独的子项目中完成。然而，为了操作方便，决定将35 GHz脉冲桥作为一个独立模块构建，以便在8-18 GHz进行实验。这将需要增加几个组件，包括源，以完成独立的35 GHz桥。这项工作正在进行中。

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.