Liquid stub tuner for ion cyclotron heating

R. Kumazawa, T. Mutoh, T. Seki, F. Sinpo, G. Nomura, T. Ido, T. Watari, Jean Marie Noterdaeme, Yangping Zhao

研究成果: ジャーナルへの寄稿記事

40 引用 (Scopus)

抄録

Ion cyclotron range of frequency (ICRF) heating on the large helical device (LHD) is characterized by high power (up to 12 MW) and steady state operation (30 min). The LHD is a helical device (with a major radius of 3.9 m and a minor radius of 0.6 m) with superconducting coil windings (1=2, m=10). The main purpose of physical research is to investigate currentless and disruption-free plasma. Research and development for steady state ICRF heating has been carried out in recent years: A high rf power transmission system consisting of stub tuners, a ceramic feedthrough, and an ion cyclotron heating loop antenna has been developed. In addition, steady state operation of a rf oscillator has been achieved at a power higher than 1 MW. A liquid stub tuner has been proposed as an innovation. The liquid stub tuner makes use of the difference between the rf wavelengths in liquid and in gas due to the different relative dielectric constants. The liquid stub tuner has been experimentally proved to be a reliable rf component for high power transmission systems. Test results have quantitatively demonstrated that it can be used at high if voltage: 61 kV for 10 s and 50 kV for 30 min. Furthermore, the liquid surface can be shifted under high rf voltage without breakdown, which suggests that it can be employed as a feedback control impedance matching tool to keep reflected rf power at a low level with regard to a temporal variation of plasma loading resistance.

元の言語英語
ページ(範囲)2665-2673
ページ数9
ジャーナルReview of Scientific Instruments
70
発行部数6
DOI
出版物ステータス出版済み - 6 1999

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Cyclotrons
cyclotrons
Heating
heating
power transmission
Ions
Liquids
liquids
high voltages
ions
Power transmission
tuners
loop antennas
radii
impedance matching
Tuners
liquid surfaces
Plasmas
Loop antennas
research and development

All Science Journal Classification (ASJC) codes

  • Instrumentation

これを引用

Kumazawa, R., Mutoh, T., Seki, T., Sinpo, F., Nomura, G., Ido, T., ... Zhao, Y. (1999). Liquid stub tuner for ion cyclotron heating. Review of Scientific Instruments, 70(6), 2665-2673. https://doi.org/10.1063/1.1149826

Liquid stub tuner for ion cyclotron heating. / Kumazawa, R.; Mutoh, T.; Seki, T.; Sinpo, F.; Nomura, G.; Ido, T.; Watari, T.; Noterdaeme, Jean Marie; Zhao, Yangping.

:: Review of Scientific Instruments, 巻 70, 番号 6, 06.1999, p. 2665-2673.

研究成果: ジャーナルへの寄稿記事

Kumazawa, R, Mutoh, T, Seki, T, Sinpo, F, Nomura, G, Ido, T, Watari, T, Noterdaeme, JM & Zhao, Y 1999, 'Liquid stub tuner for ion cyclotron heating', Review of Scientific Instruments, 巻. 70, 番号 6, pp. 2665-2673. https://doi.org/10.1063/1.1149826
Kumazawa R, Mutoh T, Seki T, Sinpo F, Nomura G, Ido T その他. Liquid stub tuner for ion cyclotron heating. Review of Scientific Instruments. 1999 6;70(6):2665-2673. https://doi.org/10.1063/1.1149826
Kumazawa, R. ; Mutoh, T. ; Seki, T. ; Sinpo, F. ; Nomura, G. ; Ido, T. ; Watari, T. ; Noterdaeme, Jean Marie ; Zhao, Yangping. / Liquid stub tuner for ion cyclotron heating. :: Review of Scientific Instruments. 1999 ; 巻 70, 番号 6. pp. 2665-2673.
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