| Project/Area Number |
03044156
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
OHKUBO Kunizo National Institute for Fusion Science, 教授 (00023739)
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| Co-Investigator(Kenkyū-buntansha) |
A. G. A. VER オランダ, FOMプラズマ物理研究所, 研究員
V. ECKMANN ドイツ, アックスプランクプラズマ物理研究所, 研究員
G. TONON フランス, カダラシュ原子力研究所, 主任研究員
J. PRETTEREB ドイツ, ステュットガルト大学・プラズマ研究所, 研究員
H. KUMRIC ドイツ, ステュットガルト大学・プラズマ研究所, 研究員
GUNTHER A. M ドイツ, ステュットガルト大学・プラズマ研究所, 主任研究員
PAUL G. SCHI ドイツ, ステュットガルト大学・プラズマ研究所, 研究員
WALTER KASPA ドイツ, ステュットガルト大学・プラズマ研究所, 研究員
MAEKAWA Takashi Kyoto University Faculty of Science, 理学部, 助手 (20127137)
NAKAJIMA Masamitsu Kyoto University Faculty of Engineering, 工学部, 助教授 (60025939)
KUBO Shin National Institute for Fusion Science, 助手 (80170025)
HOSOKAWA Minoru National Institute for Fusion Science, 助教授 (50115630)
SATO Motoyasu National Institute for Fusion Science, 助教授 (60115855)
PRETTEREBNER J Institut fur Palsmaforschung Universitat der Stuttgart
KUMRIC H Institut fur Plasmaforschung Universitat der Stuttgart
MULLER Gunther A Institut fur Plasmaforschung Universitat der Stuttgart
SCHULLER Paul G Institut fur Plasmaforschung Universitat der Stuttgart
KASPAREK Walter Institut fur Plasmaforschung Universitat der Stuttgart
TONON G. Center Etude de Cadarach
VERHOEVEN A.G.A. FOM Institut voor Plasmafysica Rijnhuizen
ECKMANN V. Maxplanck Institut fur Plasmaphysik
ECKMAN V. マックスプランクプラズマ物理研究所(ドイツ), 研究員
TRAN M.Q. ローザンヌ工科大学, プラズマ物理研究所(スイス), 主任研究員
MIILLER Gunt ステュツトガルト大学, プラズマ研究所(ドイツ), 主任研究員
SCHIILLER Pa ステュツトガルト大学, プラズマ研究所(ドイツ), 研究員
KASPAREK Wal ステュツトガルト大学, プラズマ研究所(ドイツ), 研究員
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1992: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1991: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | millimeter wave / transmission line / corrugated waveguide / mode-convertor / radiation pattern / 90-degree bend / polarizer / electron cyclotron heating / コルゲ-ト導波管 / モ-ド変換器 / 放射パタ-ン / FFTモ-ド検出器 / Kースペクトル |
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| Research Abstract |
The purpose of the research is to develop the transmission-line system of millimeter-wave CW high power. To achieve the transmission elements with high performance, the study is performed effectively with the aid of the international colaboration.
The performance of roof-top type polarizer which is fabricated as a test peice is examined experimentally and numerically. As expected, the polarization angle rotates with the twice angles of the rotation angle in the polarizer. The injected power to the polarizer has a small contents of spurious mode. The insertion loss of 0.7db results from the spilled over power of the suprious mode in the reflected mirrors which is installed in the polarizer. The results is in good agreement with the numerical analysis.
The splitt waveguide as a function of distance and diameter which is used to the advanced gyrotron is investigated. Here, the analysis is based on the orthogonal relation of electromagnetic field and calculation of radation patterns. For ins
… More
tance, in the diameter of 101.6 mm and frequency of 84 GHz and the mode of TE15,2, the coupling to the TE15,2 for secondary waveguide decreases with the rate of 1.85%/mm up to the separation of 70mm. For the optimum of the size in waveguide the same diameter for the secondary waveguide as the launching waveguide.
The DC break as a splitt waveguide of the corrugated guide is analyzed. In addition to the splitt distance, an influence by the off-axis is discussed. Here, the DC break consists of the corrugated waveguide. The results show the 98.5% of HE11 mode at the 2.5 cm of splitt distance. When the axis of waveguide is displaced by x=y=2mm the transmission rate does not changed.
The mode-convertor with the wall deformation is analyzed in order to use the convertor to gaussian mode in the gyrotron. The numerical code with including the differential equation is developed. The wall deformation with complex helical shapes is good for the gaussian convertor.
The rectangular corrugated waveguide is developed for the purpose of the elliptical gaussian beam in the luanching anntenas and the window for gyrotron. The calculation of the dispersion relation, pattern of electromagnetic fields, attenuation of power is satisfactory for the real purpose. The coupling of circular corrugated waveguide to the square corrugated guide is discussed. The coupling coefficients is as high as 99%. Less
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