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Investigation of the Characteristics of String-Plasma

Research Project

Project/Area Number 01460251
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field プラズマ理工学
Research InstitutionTokai University

Principal Investigator

TANIKAWA Takao  R&D Institute, Tokai Univ. Assoc. Prof., 開発技術研究所, 助教授 (70207174)

Co-Investigator(Kenkyū-buntansha) SUNAKO Katsuhiko  School of Science, Tokai Univ. Prof., 理学部, 教授 (50056016)
YABE Eiji  R&D Institute, Tokai Univ. Prof., 開発技術研究所, 教授 (70056018)
NANRI Kenzou  R&D Institute, Tokai Univ. Prof., 開発技術研究所, 教授 (20056211)
SHINOHARA Motoo  R&D Instutute, Tokai Univ. Prof., 開発技術研究所, 教授 (60162616)
TAKAYAMA Kazuo  R&D Institute, Tokai Univ. Prof., 開発技術研究所, 教授 (20023690)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1990: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsString-Plasma / TP-D Type Discharge / Mass Separation / Plasma Sheaths / Ion Cyclotron Resonance / Low-Energy Ion Beams / Diamagnetic Effect of Plasmas / Steady-State High-beta Plasmas / 定常着βプラズマ / 高純度プラズマ / 非中性プラズマ / 計算機シミュレ-ション / 高ベ-タ・プラズマ / プラズマ空間電位の制御 / コンピュ-タ・シミュレ-ション
Research Abstract

Achievements of our two-year research project on string-plasma are summarized below.
1. A technique to produce a new type of filamentary plasma (or "string-plasma") in steady-state has been established by utilizing a TP-D type discharge apparatus. In this plasma, the majority of ion guiding centers are placed in the vicinity of the axis of the plasma column. In order to attain this situation, the following two methods were employed utilizing :
(1) Radial dc-electric fields generated inside cylindrical floating electrodes with an extremely small inner diameter
and
(2) A point-cusp magnetic-field configuration.
2. Detailed measurements of string-plasma revealed several characteristics of this plasma :
(1) The column radius is equal to or less than the ion Larmor radius.
(2) The majority of iow guiding centers lie in the vicinity of the axis of the plasma column ; then, the plasma as a whole appears to rotate diamagnetically.
(3) The profile of the plasma space potential has a steep gradient in the radial direction ; as a result, strong radial dc-electric fields exist across plasma.
(4) In spite of the above peculiar characteristics, string-plasma as a whole is electrically neutral.
3. Applications that utilize the above special characteristics of string-plasma such as the following have been proposed :
(1) Production of impurity-free, low-energy ion-beam or stream applying ion-cyclotron resonance technique to this plasma to separate different mass ion species
and
(2) Production of high-beta steady-state plasma using the efficient diamagnetic effect of string-plasma
Some experiments and computer simulations have been carried out in order to verify the usefulness of these applications.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] T.Tanikawa: "“Application of StringーPlasma for Materials Science"" Proceedings of the 16th JapanーUSSR Electronics Symposium on New Materials and Fabrication Processes for Electronic Devices (Tokyo,Japan,1989). 61-71 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Tanikawa: "“Particle Dynamics in a Stringーplasma"" Proceedings of 1989 International Conference on Plasma Physics (New Delhi,India,1989). Vol.III. 1157-1160 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] H.Watanabe: "“RF Plasma Production Using a Helical Antenna"" Proceedings of the 7th Symposium on Plasma Processing (Tokyo,Japan,1990). 301-304 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Noguchi: "“Production of StringーPlasma"" Journal of Advanced Science. Vol.2 No.3. 189-193 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Harakawa: "“A Concept of Plasma Source for Producing an ImpurityーFree, LowーEnergy Ion Beam by Using a StringーPlasma"" Journal of Advanced Science. Vol.2 No.3. 194-197 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Noguchi: "“Production of ImpurityーFree Plasma Stream Using StringーPlasma"" Proceedings of 8th Symposium on Plasma Processing (Nagoya,Japan,1991). 97-100 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 編集委員長:明石 和夫: "プラズマ材料科学ハンドブック" オ-ム社, 700 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 1. T. Tanikawa, T. Noguchi, and K. Takayama: ""Application of String-Plasma for Material Science"" Proceedings of the 16th Japan-USSR Electronics Symposium on New Materials and Fabrication Processer for Electronic Devices(Tokyo, Japan, 1989). 61-72

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 2. T. Tanikawa, T. Noguchi, S. Harakawa, H. Watanabe, K. Yamauchi, K. Sunako, K. Nanri, and K. Takayama: ""Particle Dynamics in a String-plasma"" Proceedings of 1989 International Conference on Plasma Physics(New Delhi, India, 1989). Vol. 111. 1157-1160

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 3. H. Watanabe, S. Harakawa, T. Tanikawa, and K. Takayama: ""RF Plasma Production Using a Helical Antenna"" Proceedings of the 7th Symposium on Plasma Processing (Tokyo, Japan, 1990). 301-304

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 4. T. Noguchi, S. Harakawa, T. Tanisawa, and K. Takayama: ""Production of String-Plasma"" Journal of Advanced Science. Vol. 2 No. 3. 189-193 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 5. S. Harakawa, T. Noguchi, T. Tanikawa, and K. Takayama: ""A Concept of Plasma Source for Producing an Impurity-Free, Low-Energy Ion Beam by Using a string-Plasma"" Journal of Advanced Science. Vol. 2 No. 3. 194-197 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 6. T. Noguchi, S. Harakawa, T. Tanikawa, and K. Takayama: ""Production of Impurity-Free Plasma Stream Using String-Plasma"" Proceedings of the 8th Symposium on Plasma Processing (Nagoya, Japan, 1991). 97-100

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Noguchi: "Production of StringーPlasma" Journal of Advanced Science. Vol.2 No.3. 189-193 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Harakawa: "A Concept of Plasma Source for Producing an ImpurityーFree.LowーEnergy Ion Beam by Using a StringーPlasma" Journal of Advanced Science. Vol.2 No.3. 194-197 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Noguchi: "Production of ImpurityーFree Plasma Stream Using StringーPlasma" Proceedings of the 8th Symposium on Plasma Processing (Nagoya,Japan,1991). 97-100 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Tanikawa: "Particle Dynamics in a String-Plasma" Proceedings of 1989 International Conference on Plasma Physics. III. 1157-1160 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Tanikawa: "Application of String-Plasma for Materials Science" Proceedings of the 16th Japan-USSR Electronics Symposium on New Materials and Fabrication Processes for Electronic Devices. 61-72 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Noguchi: "A Concept for Isotope Separation in a Sheet Plasma by Using Ion Cyclotron Resonance Heating" Nuclear Instruments and Methods in Physical Research B. 37/38. 632-635 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 野口武史: "ストリング・プラズマについて" プレ-ティングとコ-ティング. 8. 326-329 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] 野口武史: "ストリング・プラズマの特性" 電気学会研究会資料プラズマ研究会. EPー88ー84. 93-102 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] 編集委員長,明石和夫: "プラズマ材料科学ハンドブック" オ-ム社, 700 (1990)

    • Related Report
      1989 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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