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1989 Fiscal Year Final Research Report Summary

Antennas for whispering gallery mode and guidance of high-power millimeter-wave beams

Research Project

Project/Area Number 63880001
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field プラズマ理工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

NAKAJIMA Masamitsu  Kyoto Univ., Electronics, Assoc. Professor, 工学部, 助教授 (60025939)

Co-Investigator(Kenkyū-buntansha) SAWAYA Kunio  Tohoku Univ., Electric, Assoc. Professor, 工学部, 助教授 (60108470)
SHIMOZUMA Takashi  Mitsubishi Electric Co., Plasma Engineer, 中央研究所, 技師
MIYAKE Shouji  Osaka Univ., Welding, Professor, 溶接工学研究所, 教授 (40029286)
TERUMICHI Yasushi  Kyoto Univ., Physics, Assoc.Professor, 理学部, 助教授 (50025384)
SATO Motoyasu  Kyoto Univ., Nuclear, Assoc.Professor, ヘリオトロン核融合研究センター, 助教授 (60115855)
Project Period (FY) 1988 – 1989
Keywordsmillimeter wave / nuclear fusion / electromagnetic wave / ECRH / gyrotron / whispering gallery mode / reflector antenna / beam propagation
Research Abstract

1. Antennas for whispering gallery mode Using the geometrical optics approximation, some antennas for whispering gallery mode (WGM) have been designed, fabricated and tested with low power. Since an almost expected results have been obtained, they are going to be, installed in the practical machine. In addition, we devised a direct coupled antenna for a WGM gyrotron and have made a patent application.(Kyoto University, Electronics and Nuclear Departments) Applying the UTD method, an analysis has been made to improve the approximation for the radiation characteristics of the antenna.(Tohoku Univ.)
2. Strong focusing of high-power millimeter wave beam A Focusing-type millimeter wave antenna consisting of elliptic and parabolic reflectors has been designed, assembled and applied to a gyrotron at 60 GHz with 200 kW. Since the beam has been focused to about 10 mm in diameter as calculated, it will be applied to the heating and processing of materials.(Osaka Univ.)
3. WGM gyrotrons A WGM gyrotron with an output waveguide of 28 mm in diameter, has been assembled. It produced TE81-mode millimeter-wave power of 54-7lkW (9.5-12.5 % in efficiency) at 114 GHz.(Mitsubishi) Oscillations with TE51, TE61 and TE42 have been observed from a third- order gyropeniotron at 70 GHz. An tunable third-order cyclotyon-resonance gyrotron has been assembled and assured of its oscillation.(Fukui Univ.)
4. Application to ECRH By focusing millimeter wave in the poloidal direction of the tokamak with an elliptic-cylinder reflector and exciting an extraordinary wave from the lower magnetic field side, it has been proved that the second-order cyclotron-resonance layer absorbs the wave effectively. (Kyoto Univ. Physics)

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] O.Wada,M.Hashimoto,M.Nakajima: "Calculation of radiation from a quasi-optical reflector antenna for whispering gallery mode" Int.J.Electronics. 65. 725-732 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Idehara,T.Tatsukawa,G.f.Brand,P.W.Fekete,K.J.Moore: "Test of a two-dimensionally focusing quasi-optical antenna using a gyrotron" Appl.Phys.Lett.54. 1740-1741 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中島将光: "準光学的ミリ波回路素子の開発" 応用物理. 58. 1212-1216 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐藤,天野,中島将光: "ホィスパリング・ギャラリ-・モ-ド用アンテナ" 応用物理. 58. 1253-1254 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Terumichi,H.Tanaka,A.Ando,K.Ogura,S.Ide,M.Iida,T.Itoh,M.Iwamasa,K.Hanada,H.Sakakibara,T.Minami,M.Yoshida,T.Maekawa,S.Tanaka: "Electron cyclotron current drive and heating experiments on the WT-3 tokamak" AIP Conference Proceedings. 190. 88-91 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Miyake,O.Wada,M.Nakajima,T.Idehara: "Forcusing of high power millimeter-wave radiation by quasi-optical Antenna system,to be submitted"

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] O.Wada, M.Hashimoto and M.Nakajima: "Calculation of radiation from a quasioptical reflector antenna for whispering gallery mode" Int.J. Electronics. Vol.65, pp.725-732(1988).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Idehara, T.Tatsukawa, G.F.Brand, P.W.Fekete and K.J.Moore: "Test of a twodimensionally focusing quasi-optical antenna using a gyrotron" Appl.Phys.Lett. Vol.54, pp.1740-1741(1989).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Nakajima: "Development of quasi-optical millimeter-wave components" Japanese Journal of Applied Physics. Vol.58, pp.1212-1216(1989).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Terumichi, H.Tanaka, A.Ando, K.Ogura, S.Ide, M.Iida, T.Itoh, M.Iwamasa, K.Hanada, H.Sakakibara, T.Minami, M.Yoshida, T.Maekawa and S.Tanaka: "Electron cyclotron current drive and heating experiments on the WT-3 tokamak" AIP Conference Proceedings. Vol.190, pp.88-91(1989).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Sato, Y.Amano and M.Nakajima: "Antennas for whispering gallery mode" Japanese Journal of Applied Physics. Vol.58, pp.1253-1254(1989).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Miyake, O.Wada, M.Nakajima, T.Idehara: "Focusing of high-power millimeter-wave radiation by quasi-optical Antenna system"

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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