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Studies of Spatial Distributions of Potential Confined Electron Distribution Functions and a Scaling Law of Plasma Confining Potentials for Producing High Electron Temperatures and High Densities

Research Project

Project/Area Number 09480106
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionUniversity of Tsukuba

Principal Investigator

CHO Teruji  Univ.Tsukuba, Institute of Physics, Professor, 物理学系, 教授 (80171958)

Co-Investigator(Kenkyū-buntansha) TANAKA Shigetoshi  Kyoto University, Professor Emeritus, 名誉教授 (20025240)
KOHAGURA Junko  Univ.Tsukuba, Plasma Research Centre/Insti.Physics, Research Associate, プラズマ研究センター・物理学系, 助手 (60302345)
YOSHIKAWA Masashi  Univ.Tsukuba, Plasma Research Centre/Insti.Physics, Research Associate, プラズマ研究センター・物理学系, 助手 (00272138)
NAKASHIMA Yousuke  Univ.Tsukuba, Plasma Research Centre/Insti.Physics, Assistant Prof., プラズマ研究センター・物理学系, 講師 (00188939)
KONDOH Mafumi (HIRATA Ma)  Univ.Tsukuba, Plasma Research Centre/Insti.Physics, Assistant Prof., プラズマ研究センター・物理学系, 講師 (70222247)
坂本 宜照  日本学術振興会, 特別研究員
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 1998: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1997: ¥3,800,000 (Direct Cost: ¥3,800,000)
KeywordsPlasma Potential / Electron Distribution Function / Electron Temperature / High Plasma Density / High Electron Temperature / Scaling Law / X-ray Diagnostics / Semiconductor Detector
Research Abstract

For the purpose of the improvement of plasma electron temperatures due to potential confinement for plasma electrons, the investigations of (1) the relation and scaling laws of spatial structures of electron temperatures and electron confinement potentials, as well as (2) the relation between produced potentials and incident plasma heating powers have been carried out. In particular, our newly developed plasma diagnostic systems on the basis of the newly proposed theory on the x-ray-energy response of semiconductor detectors are applied for spatially resolved data analyses of the spatial distributions of both electron temperatures and plasma confining potentials.
These results on the data analyses are usefully employed for the total effects on plasma parameters ; that is, the relation and the scaling law for electron temperatures and electron confining potentials have been obtained as functional relations. These provide future methods for improvement in plasma parameters.
Electron temperatures are well scaled with the values of electron confining thermal-barrier potentials. In turn, the thermal-barrier potentials are well scaled with electron heating powers ; namely, electron cyclotron heating (ECH) powers. In addition, these scalings have the dependence of plasma densities and ion-confining potentials. These total scalings are systematically constructed, and their details will be published in journals.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] T.Cho et al.: "Development and Characterization of Semiconductor Ion Detectors for Plasma Diagnostics in the Range over 0.3 keV" Review of Scientific Instruments. 68. 324-327 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Cho et al.: "Characterization of New Semiconductor Detectors for X-ray Tomography in the ASDEX Upgrade Tokamak and Its Generalized Physics Interpretations" Review of Scientific Instruments. 68. 774-777 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Cho et al.: "Characterization and Interpretation of the Quantum Efficiencies of Multilayer Semiconductor Detectors Using a New Theory" Journal of Synchrotron Radiation. 5. 877-879 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.Kohagura et al.: "Alternative Principle and Method in X-ray Diagnostics for Plasma Electron Temperatures" Physical Review E. 56. 5884-5893 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.Kohagura et al.: "International Collaboration Researches on the Effects of a New Theory on the Plasma X-ray Diagnostics Using Semiconductor X-ray Detectors" Plasma Physics Reports (Fizika Plazmy). 24. 218-221 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Sakamoto et al.: "Characterization of a Semiconductor Detector and Its Application for Ion Diagnostics Using a Novel Ion Energy Spectrometer" Review of Scientific Instruments. 70. 857-860 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Cho et al.: "Development and Characterization of Semiconductor Ion Detectors for Plasma Diagnostics in the Range over 0.3keV" Review of Scientific Instruments. 68. 324-327 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Cho et al.: "Characterization of New Semiconductor Detectors for X-ray Tomography in the ASDEX Upgrade Tokamak and Its Generalized Physics Interpretations" Review of Scientific Instruments. 68. 774-777 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Cho et al.: "Characterization and Interpretation of the Quantum Efficiencies of Multilayer Semiconductor Detectors Using a New Theory" Journal of Synchrotron Radiation. 5. 877-879 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.Kohagura et al.: "Alternative Principle and Method in X-ray Diagnostics for Plasma Electron Temperatures" Physical Review E. 56. 5884-5893 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.Kohagura et al.: "International Collaboration Researches on the Effects of a New Theory on the Plasma X-ray Diagnostics Using Semiconductor X-ray Detectors" Plasma Physics Reports (Fizika Plazmy). 24. 218-221 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Sakamoto et al.: "Characterization of a Semiconductor Detector and Its Application for Ion Diagnostics Using a Novel Ion Energy Spectrometer" Review of Scientific Instruments. 70. 857-860 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Cho et al.: "Characterization and Interpretation of the Quantum Efficiencies of Multilayer Semiconductor Detectors Using New Theory" Journal of Synchrotron Radiation. 5. 877-879 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Cho et al.: "Effects of Neutrons on Semiconductor X-Ray Detectors Including n-Type Joint European Torus and p-Type GAMMA 10 Tomography Detectors" Review of Scientific Instruments. 70. 577-580 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Cho et al.: "A New Principle in Plasma Electron-Temperature Diagnostics Using a Semiconductor X-ray Detector" Plasma Devices and Operation. in press (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] J.Kohagura et al.: "International Collaboration Researches on the Effects of a New Theory on the Plasma X-ray Diagnostics Using Semiconductor X-ray Detectors" Plasma Physics Reports(Fizika Plazmy). 24. 218-221 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] J.Kohagura et al.: "New Methods for Semiconductor Charge-Diffusion-Length Measurements Using Synchrotron Radiation" Journal of Synchrotron Radiation. 5. 874-876 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Sakamoto et al.: "Characterization of a Semiconductor Detector and Its Application for Ion Diagnostics Using a Novel Ion Energy Spectrometer" Review of Scientific Instruments. 70. 857-860 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Cho et al.: "Development and Characterization of Semiconductor Ion Detectors for Plasma Diagnostics in the Range over 0.3 keV" Review of Scientific Instruments. 68,No.1. 324-327 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Cho et al.: "Characterization of New Semiconductor Detectors for X-ray Tomography in the ASDEX Upgrade Tokamak and Its Generalized Physics Interpretations" Review of Scientific Instruments. 68,No.1. 774-777 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Cho et al.: "X-ray Diagnostics for Investigating Electron Distribution Functions and Electron Potential Confinements" Fusion Engineering and Design. 34-35. 179-182 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] J.Kohagura et al.: "Alternative Method in X-ray Diagnostics for Plasma Electron-Temperature Measurements" Physical Review E. 56,No.5B. 5884-5893 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] J.Kohagura et al.: "Applications of a New Theory on the X-ray Energy Responses of Semiconductor Detector to Plasma X-ray Diagnostics" Fusion Engineering and Design. 34-35. 183-187 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Sakamoto et al.: "Plasma-Ion Diagnostics Using a Newly Designed Differential-Spectrum Ion-Energy Analyzer with Electrostatic Slanted Grids" Fusion Engineering and Design. 34-35. 543-546 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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