A travelling wave tube microwave spectrometer

C. D. Cogley; S. G. Kukolich

doi:10.1088/0022-3735/13/7/015

A travelling wave tube microwave spectrometer

C. D. Cogley, S. G. Kukolich

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The sensitivity of a Stark-modulated waveguide microwave spectrometer can be significantly improved by using a travelling wave tube or solid state microwave amplifier prior to the crystal detection. In this paper the authors discuss the travelling wave tube. The increase in the sensitivity results from the improved noise figure of the travelling wave tube relative to crystal video type detectors. Wide bandwidth travelling wave tube or solid state amplifiers are available so full waveguide bandwidths may be utilised. Rotational transitions for J=1 from 0 lines of cyanogen bromide, BrCN, were measured with the travelling wave tube system and a standard video detector and the spectra are given here.

Original language	English (US)
Article number	015
Pages (from-to)	761-762
Number of pages	2
Journal	Journal of Physics E: Scientific Instruments
Volume	13
Issue number	7
DOIs	https://doi.org/10.1088/0022-3735/13/7/015
State	Published - 1980

ASJC Scopus subject areas

Instrumentation
General Materials Science
General Engineering
General Physics and Astronomy

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10.1088/0022-3735/13/7/015

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AB - The sensitivity of a Stark-modulated waveguide microwave spectrometer can be significantly improved by using a travelling wave tube or solid state microwave amplifier prior to the crystal detection. In this paper the authors discuss the travelling wave tube. The increase in the sensitivity results from the improved noise figure of the travelling wave tube relative to crystal video type detectors. Wide bandwidth travelling wave tube or solid state amplifiers are available so full waveguide bandwidths may be utilised. Rotational transitions for J=1 from 0 lines of cyanogen bromide, BrCN, were measured with the travelling wave tube system and a standard video detector and the spectra are given here.

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A travelling wave tube microwave spectrometer

Abstract

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