UPGRADES TO SCHOLES LOW-POWER 35 GHZ PULSE BRIDGE

升级至 SCHOLES 低功耗 35 GHZ 脉冲桥

• 批准号: 8364051
• 负责人: PETER P BORBAT
• 金额: $ 0.84万
• 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/8364051
• 关键词: Complex; Electron Nuclear Double Resonance; Frequencies; Funding; Future; Grant; National Center for Research Resources; Performance; Physiologic pulse; Principal Investigator; Research; Research Infrastructure; Resources; Scheme; Source; Technology; United States National Institutes of Health; base; cost; design; experience; improved; instrument

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. Based on our experience with the construction of homodyne 34 GHz spectrometer for Dr. Scholes upon his request, we proposed a future upgrade, based on our proprietary bridge design. This will considerably improve performance of pulse ENDOR based on this bridge. The existing version is an ad-on to his narrowband 34 GHz CW Bruker ER 200D spectrometer. The upgrade will convert it into a stand-alone instrument. The transmitter and receiver channels will be modified for the best performance. Peak power will be increased by a factor of 3 to 4W. The spectrometer will no longer require tunable ENDOR resonator, since the tuning bandwidths after upgrade will be at least 2 GHz. Also, digitizer unit will replace the boxcar averager, which is also a significant improvement for pulse ENDOR. This will enable complex frequency switching schemes, including pseudorandom mode.

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。 根据我们应Scholes博士的要求为他建造零差34 GHz频谱仪的经验，我们提出了基于我们专有的电桥设计的未来升级方案。这将大大提高基于该电桥的脉冲ENDOR的性能。现有的版本是他的窄带34 GHz CW Bruker ER 200 D光谱仪的附件。升级后将使其成为一个独立的仪器。 将修改发射器和接收器通道以获得最佳性能。峰值功率将增加3到4 W。光谱仪将不再需要可调谐ENDOR谐振器，因为升级后的调谐带宽将至少为2 GHz。此外，数字化单元将取代矩形波串平均器，这也是脉冲ENDOR的一个重大改进。这将实现复杂的频率切换方案，包括伪随机模式。