[Table of Contents]

Plasma and Fusion Research

Volume 8, 1205107 (2013)

Rapid Communications


Development of a High Power Gyrotron Operating at 28 and 35 GHz
Tsuyoshi KARIYA, Ryutaro MINAMI, Tsuyoshi IMAI, Taku EGUCHI, Keishi SAKAMOTO1), Yoshika MITSUNAKA2), Tomoharu NUMAKURA and Yoichi ENDO
Plasma Research Center (PRC), University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
1)
Japan Atomic Energy Agency (JAEA), Naka, Ibaraki 311-0193, Japan
2)
Toshiba Electron Tube & Devices Co., Ltd. (TETD), Otawara, Tochigi 324-8550, Japan
(Received 27 March 2013 / Accepted 21 May 2013 / Published 15 August 2013)

Abstract

An experimental and design study has been commenced for a dual-frequency gyrotron (28 and 35 GHz). The target output power at 28 GHz is 2 MW. For a modified 28 GHz 1 MW gyrotron, an output power of 1.25 MW and operation of 0.6 MW for 2 s have been achieved at 28 GHz. For the 35.45 GHz oscillation test, a cavity oscillation power of 1.2 MW and an efficiency of 33.9% have been confirmed by considering the calculated transmission efficiency of 72%. These results support the development of dual-frequency gyrotrons for lower frequency ranges.


Keywords

dual-frequency (28 GHz and 35 GHz) gyrotron, oscillation test, mode converter, radiation angle, electron cyclotron heating

DOI: 10.1585/pfr.8.1205107


References

  • [1] T. Kariya et al., J. Infrared Milli. Terahz Waves 32, 295 (2011).
  • [2] K. Kajiwara et al., Appl. Phys. Express 4, 126001 (2011).
  • [3] T. Eguchi et al., Fusion Sci. Tech. 63, 1T, 280 (2013).
  • [4] Jeff. Neilson et al., IEEE Trans. Plasma Sci. 30, 755 (2002).

This paper may be cited as follows:

Tsuyoshi KARIYA, Ryutaro MINAMI, Tsuyoshi IMAI, Taku EGUCHI, Keishi SAKAMOTO, Yoshika MITSUNAKA, Tomoharu NUMAKURA and Yoichi ENDO, Plasma Fusion Res. 8, 1205107 (2013).