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Variable‐Frequency Microwave Cavity Spectrometer

机译:变频微波腔光谱仪

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摘要

A variable‐frequency, resonant cavity spectrometer was developed for the investigation of molecular gases in the 10‐cm spectral region. Either Stark or Zeeman modulation could be applied. A single coaxial cavity, operated in the TEM mode, served as the Stark or Zeeman modulation cell and as the frequency tuning and stabilizing mechanism. The rf power transmitted through the cavity was detected by a bolometer and the signal component at the fundamental modulation frequency amplified and passed to a phase sensitive detector. The minimum detectable absorption coefficient for the spectrometer was determined to be αmin = 1×10-10 cm-1.
机译:开发了一种变频谐振腔光谱仪,用于研究10 cm光谱范围内的分子气体。可以应用Stark调制或Zeeman调制。在TEM模式下工作的单个同轴腔体用作Stark或Zeeman调制单元以及用作频率调谐和稳定机制。通过辐射热计检测通过腔传输的射频功率,并放大在基本调制频率处的信号分量,并将其传递给相敏检测器。光谱仪的最小可检测吸收系数确定为αmin= 1×10-10 cm-1。

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