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A K-band microwave spectrograph is described which employs a Stark-modulated resonant cavity as an absorption cell. The cavity is in the form of a circular cylinder of variable length, operating in the TE01p modes. The modulating field is parallel to the cylinder axis, and is sufficiently uniform to permit the resolution of Stark components. The sensitivity of the cavity spectrograph is comparable with that of a wave-guide spectrograph.
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Peter H. Verdier (1958) studied this question.
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