Initial operation of a high-power frequency-doubling x-band magnicon amplifier

Steven H. Gold, Alien K. Kinkead, Arne W. Fliflet, Bahman Hafizi, Wallace M. Manheimer

Research output: Contribution to journalArticlepeer-review


This paper reports the initial high-power operation of a frequency-doubling magnicon amplifier at 11.120 GHz. The deflection cavities operate at S.560 GHz. The device is operating in a single-pulse mode at 650 kV and ~225 A, using a 5.5-mm diameter beam from a plasma cathode, at a magnetic field of 6.7-8.2 kG. In order to overcome a gain saturation problem in the deflection cavities caused by plasma loading, the penultimate deflection cavity is operated very close to self-oscillation. The typical output pulselength is 100 ns full width at half maximum (FWHM), and is limited by RF breakdown of the penultimate cavity. Based on the measured far-field antenna pattern and absolute calibration of all microwave components, the measured output power is 14 MW (±3 dB), corresponding to an efficiency of ~10%.

Original languageEnglish (US)
Pages (from-to)947-956
Number of pages10
JournalIEEE Transactions on Plasma Science
Issue number3
StatePublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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