A travelling wave tube microwave spectrometer

C. D. Cogley, S. G. Kukolich

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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 languageEnglish (US)
Article number015
Pages (from-to)761-762
Number of pages2
JournalJournal of Physics E: Scientific Instruments
Issue number7
StatePublished - 1980

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


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