| Project/Area Number |
01460245
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
プラズマ理工学
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| Research Institution | Tohoku University |
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Principal Investigator |
KUNIYOSHI Yokoo Tohoku Univ. Res. Inst. Elec. Comm., Associate Professor, 電気通信研究所, 助教授 (60005428)
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| Co-Investigator(Kenkyū-buntansha) |
SATO Nobuyuki Tohoku Univ. Res. Inst. Elec. Comm., Research Associate, 電気通信研究所, 助手 (10178759)
HATAKEYAMA Rikizo Tohoku Univ. Fac. Engrg., Associate Professor, 工学部, 助教授 (00108474)
ONO Shoichi Tohoku Univ. Res. Inst. Elec. Comm., Professor, 電気通信研究所, 教授 (00005232)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥6,200,000 (Direct Cost: ¥6,200,000)
Fiscal Year 1990: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1989: ¥4,400,000 (Direct Cost: ¥4,400,000)
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| Keywords | Gyrotron / Peniotron / Free electron laser / Electron cyclotron resonance / Microwave tube / Plasma heating / 自由電子レ-ザ- |
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| Research Abstract |
The peniotron is well known to have a very high conversion efficiency for generation of microwave and submillimeter wave. Especially, in an auto-resonant peniotron oscillator (ARPO), nearly 100% of the efficiency has been theoretically expected in the ranges. This project has been performed to investigate experimentally such a promising features of the tube and has cleared the high efficiency of ARPO.
1. Proposal of rf circuits for the auto-resonant peniotron interaction.
We proposed magnetron type and a quadrupole type circuits to sustain the autoresonant condition and showed that both circuits are useful for the investigation of high efficiency operation of ARPO.
2. Design and fabrication of test tube.
We designed and fabricated two types of test tube for ARPO experiments in which the magnetron type and the quadrupole type cavities are mounted respectively.
3. Experimental results and discussions.
A test tube with the magnetron type cavity showed the highest electronic efficiencies of 72% and 50% for forward and backward mode operations respectively. These Values are the highest in the cyclotron fast wave tubes and show clearly the highly efficient operation of APO. The quadrupole test tubed demonstrated the wide band frequency tunability which was one of the most important features in a high power and high efficiency microwave and millimeter wave tube.
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