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Development of second harmonic gyrotrons, Gyrotron FU CW GII and Gyrotron FU CW GIII, equipped with internal mode converters

  • Yoshinori Tatematsu
  • Yuusuke Yamaguchi
  • Toshitaka Idehara
  • Tatsuru Kawase
  • Ryoichi Ichioka
  • Isamu Ogawa
  • Teruo Saito
  • Toshimichi Fujiwara
Article

Abstract

Second harmonic gyrotrons, Gyrotron FU CW GII and Gyrotron FU CW GIII, were developed at the Research Center for Development of Far-Infrared Region, University of Fukui, Japan to achieve two goals. Each gyrotron was equipped with an internal quasi-optical mode converter. Using Gyrotron FU CW GII allowed the design of the cavity and mode converter to be validated, which was the first goal. After that, Gyrotron FU CW GIII, which is an improved version of Gyrotron FU CW GII, allowed us to achieve a high power output of up to 420 W, which was the second goal, with a cathode voltage setting of −21 kV and a beam current of 0.57 A. This was achieved using a newly developed electron gun and with the careful sitting of the gyrotron on the magnet.

Keywords

Gyrotron Gaussian beam Mode converter High power radiation source Second harmonic resonance 

Notes

Acknowledgement

This work was partly supported by a special fund for research projects from the Ministry of Education, Science, Sports and Culture of Japan.

References

  1. 1.
    Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Ozeki, R. Ikeda, T. Kanemaki, I. Ogawa, T. Saito, J. Infrared Milli. Terahz. Waves 33, 292 (2012).Google Scholar
  2. 2.
    T. Yamazaki, A. Miyazaki, T. Namba, S. Asai, T. Kobayashi, T. Suehara, Y. Tatematsu, I. Ogawa, T. Idehara, in “Extended abstracts of 38th IRMMW-THz” (2013) Fr1-5.Google Scholar
  3. 3.
    A. Miyazaki, T. Yamazaki, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, T. Idehara, I. Ogawa, Y. Tatematsu, J. Infrared Milli. Terahz. Waves, DOI  10.1007/s10762-013-0001-8 (2013).
  4. 4.
    T. Idehara and S.P. Sabchevski, J. Infrared Milli. Terahz. Waves 33, 667 (2012).CrossRefGoogle Scholar
  5. 5.
    T. Yamazaki, A. Miyazaki, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, I. Ogawa, T. Idehara, S. Sabchevski, Phys. Rev. Lett. 108 253401 (2012).CrossRefGoogle Scholar
  6. 6.
    L.R. Becerra, G. J. Gerfen, R. J. Temkin, D. J, Singel, R. Griffin, Phys. Rev. Lett. 71, 3561 (1993).Google Scholar
  7. 7.
    T. Idehara, I. Ogawa, L. Agusu, T. Kanemaki, S. Mitsudo, T. Saito, T. Fujiwara, H. Takahashi, Int. J. Infrared Milli. Waves 28, 433 (2007).CrossRefGoogle Scholar
  8. 8.
    T. Idehara, K. Kosuge, La Agusu, I. Ogawa, H. Takahashi, M. E. Smith, R. Dupree, J. Infrared Milli. Terahz. Waves 31, 763 (2010).Google Scholar
  9. 9.
    T. Idehara, K. Kosuge, La Agusu, R. Ikeda, I. Ogawa, T. Saito, Y. Matsuki, K. Ueda, T. Fujiwara, J. Infrared Milli. Terahz. Waves 31, 775 (2010)Google Scholar
  10. 10.
    Y. Yamaguchi, Y. Tatematsu, T. Saito, R. Ikeda, J. C. Mudiganti, I. Ogawa, T. Idehara, Plasma Fusion Res. 7, 1205004 (2012).CrossRefGoogle Scholar
  11. 11.
    Y. Yamaguchi, Y. Tatematsu, T. Saito, R. Ikeda, J. C. Mudiganti, I. Ogawa, T. Idehara, Phys. Plasmas 19, 113113 (2012).CrossRefGoogle Scholar
  12. 12.
    Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Ozeki, T. Kawase, H. Kato, J. Aiba, R. Ikeda, T. Kanemaki, I. Ogawa, T. Saito, in “Proceedings of the 4th international workshop on far-infrared technologies 2012” (2012) 34.Google Scholar
  13. 13.
    O. Dumbrajs, Int. J. Infrared Milli. Waves 15, 1255 (1994).CrossRefGoogle Scholar
  14. 14.
    N.A. Zavol’skiy, V. E. Zapevalov, M. A. Moiseev, A. S. Sedov, Radiophys. Quantum Electron. 54, 402 (2011).CrossRefGoogle Scholar
  15. 15.
    Y. Tatematsu, T. Kawase, R. Ichioka, Y. Yamaguchi, I. Ogawa, R. Ikeda, T.Idehara, T. Saito, in “Extended abstracts of 38th IRMMW-THz” (2013) Tu1-5.Google Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Yoshinori Tatematsu
    • 1
  • Yuusuke Yamaguchi
    • 1
  • Toshitaka Idehara
    • 1
  • Tatsuru Kawase
    • 1
  • Ryoichi Ichioka
    • 1
  • Isamu Ogawa
    • 1
  • Teruo Saito
    • 1
  • Toshimichi Fujiwara
    • 2
  1. 1.Research Center for Development of Far-Infrared RegionUniversity of FukuiFukuiJapan
  2. 2.Institute for Protein ResearchOsaka UniversityOsakaJapan

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