95 GHZ SPECTROMETER CW LOCK-IN DEMODULATOR UPGRADE

95 GHZ 光谱仪 CW 锁定解调器升级

• 批准号: 7956705
• 负责人: CURT R DUNNAM
• 金额: $ 0.12万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7956705
• 关键词: Amplifiers; Autacoids; Computer Retrieval of Information on Scientific Projects Database; Data; Detection; Development; Frequencies; Funding; Grant; Institution; Performance; Phase; Process; Pythons; Research; Research Personnel; Resolution; Resources; Scheme; Signal Transduction; Source; Specimen; Spectrum Analysis; System; Technology; United States National Institutes of Health; Work; Writing; analog; base; detector; digital; instrument; software systems; systems research

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. Continuous-wave spectroscopy with our ACERT 95 GHz instrument has previously utilized a single lock-in amplifier (SRS 510) for detection of the spectral lineshape. We are presently upgrading this subsystem to a digital signal processor (DSP) based lock-in (Stanford Research Systems 850) which offers a number of significant performance advantages over the previous unit. The DSP-based unit has higher dynamic reserve, lower drift, lower distortion and dramatically higher phase resolution than the conventional analog lock-in it is replacing. Additionally, due to the unit's built-in display and processing capabilities, data may be presented to the experimentalist in a range of operationally-useful formats unavailable with the previous lock-in system. The DSP unit graphical display will also facilitate setup and analysis of frequency-modulation detection for FM development work and for broad-line specimens. Integration of the new DSP lock-in amplifier into the 95 GHz spectrometer and implementation of its I/O functions into routines of the spectrometer control system requires modest revision of the control system software. Accordingly, new Python scripting routines are being written prior to replacing the former lock-in with the new DSP system. When the new routines are completed and debugged, we will transfer the spectrometer's c.w. line detection scheme from its existing analog lock-in detector to the DSP lock-in.

该副本是利用众多研究子项目之一 由NIH/NCRR资助的中心赠款提供的资源。子弹和 调查员（PI）可能已经从其他NIH来源获得了主要资金， 因此可以在其他清晰的条目中代表。列出的机构是 对于中心，这不一定是调查员的机构。 使用我们的ACERT 95 GHz仪器的连续波光谱学先前已经使用了单个锁定放大器（SRS 510）来检测光谱线形。目前，我们正在将该子系统升级到基于数字信号处理器（DSP）的锁定系统（Stanford Research Systems 850），该系统比上一个单元具有许多重要的性能优势。基于DSP的单元具有更高的动态储备，较低的漂移，较低的失真和较高的相位分辨率比传统的模拟锁定替换。此外，由于该单元的内置显示和处理功能，可以将数据以一系列具有操作使用的格式提供给实验者，而先前的锁定系统无法使用。 DSP单元图形显示还将促进FM开发工作和广泛标本的频率调制检测的设置和分析。 将新的DSP锁定放大器集成到95 GHz光谱仪中，并将其I/O功能的实现用于光谱仪控制系统的例程，这需要对控制系统软件进行适度的修订。因此，在用新的DSP系统更换以前的锁定之前，正在编写新的Python脚本例程。新例程完成并调试后，我们将转移光谱仪的C.W.从其现有模拟锁定检测器到DSP锁定的线检测方案。