[Table of Contents]

Plasma and Fusion Research

Volume 7, 2405099 (2012)

Regular Articles

Proposal of New Type Diplexer for ECCD System
Mikio SAIGUSA, Shuhei SUGAWARA, Kohei ATSUMI, Yasuhisa ODA1), Tomoki YAMAGUCHI and Keishi SAKAMOTO1)
Ibaraki University, Hitachi, Ibaraki 316-8511, Japan
1)
Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
(Received 2 December 2011 / Accepted 25 May 2012 / Published 26 July 2012)

Abstract

For improving a stabilizing efficiency of neoclassical tearing modes, the new type diplexer as a fast switching device of high power millimeter wave is proposed for an electron cyclotron current driving system. The principle is a ring resonator-type switch consisting of a ring corrugated circular waveguide, a pair of mitre-bends, and a pair of half mirrors. A mock-up diplexer was designed, fabricated, and tested in low power. The switching operation of the mock-up diplexer with slotted metal half mirrors was verified at the frequency bands of 137 GHz and 170 GHz.

Keywords

NTM, ECCD, fast switching device, diplexer, 170 GHz, half mirror

DOI: 10.1585/pfr.7.2405099

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References

  • [1] H. Zohm, G. Gantenbein, G. Giruzzi, S. Gunter, F. Leuterer, M. Maraschek et al., Nucl. Fusion 39, 577 (1999).
  • [2] M.I. Petelin, “Quasi-optics in high-power millimeter-wave systems,” AIP Conf. Proc. 691, 251 (2003).
  • [3] W. Kasparek et al., Fusion Sci. Technol. 52, 281 (2007).
  • [4] M. Saigusa et al., “Fast switching device of high power millimeter wave in ECCD system,” Proc. of 13th AMPERE Toulouse (2011) p. 285.
  • [5] K. Atsumi et al., “Research and Development of High Power Wideband Diplexer for ECCD System,” Plasma Conference 2011, Kanazawa, 23P099-P (2011).
  • [6] W. Kasparek et al., Nucl. Fusion 48, 054010 (2008).
  • [7] K. Kajiwara et al., “Development of the high power 170GHz gyrotron for ITER,” Proc. of Plasma Conference 2011, Kanazawa, 22D03 (2011).

This paper may be cited as follows:

Mikio SAIGUSA, Shuhei SUGAWARA, Kohei ATSUMI, Yasuhisa ODA, Tomoki YAMAGUCHI and Keishi SAKAMOTO, Plasma Fusion Res. 7, 2405099 (2012).