Development of high-frequency gyrotrons using high harmonics and a high magnetic field

T. Idehara, I. Ogawa, S. Mitsudo, O. Watanabe, M. Kamada, La Agusu, S. Watanabe, J. Kimura, N. Sato

Research output: Contribution to journalArticlepeer-review


Our gyrotrons developed at the Research Centre for the Development of the Far Infrared Region, Fukui University (FU), are high-frequency medium-power gyrotrons used as millimetre- to submillimetre-wave radiation sources for application to new far-infrared technologies. We have already developed a gyrotron FU series which consists of eight gyrotrons. The gyrotron series has achieved frequency tuneability in a wide range (from 38 to 889 GHz). The highest frequency corresponds to a wavelength of 337 m. This is a current record for high-frequency operation of gyrotrons. Recently, we have developed a high-harmonic gyrotron with an axis-encircling electron beam and a terahertz gyrotron with a pulse magnet. In this paper the present status of the gyrotron FU series is described.

Original languageEnglish
Pages (from-to)237-242
Number of pages6
JournalPlasma Devices and Operations
Issue number3
Publication statusPublished - 2006 Sep 1
Externally publishedYes


  • Far infrared
  • Gyrotron
  • High harmonic
  • High magnetic field
  • Submillimetre wave
  • Terahertz

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics


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