DEVELOPMENT OF PULSED 35GHZ FT ESR SPECTROMETER

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 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。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. 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.