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PLASMA HEAT TRANSPORT ALONG MAGNETIC FIELD UNDER EFFECTS OF POTENTIAL DISTRIBUTION

Research Project

Project/Area Number 05402064
Research Category

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

Allocation TypeSingle-year Grants
Research Field プラズマ理工学
Research InstitutionUNIVERSITY OF TSUKUBA

Principal Investigator

TAMANO Teruo  INSTITUTE OF PHYSICS,PROFESSOR, 物理学系, 教授 (80236744)

Co-Investigator(Kenkyū-buntansha) YASAKA Yasuyoshi  FACULTY ENG., KYOTO UNIV., ASSOC.PROFESSOR, 工学部, 助教授 (30109037)
SAITO Teruo  INSTITUTE OF PHYSICS,ASSOC.PROFESSOR, 物理学系, 助教授 (80143163)
KIWAMOTO Yasuhito  INST.OF APPLIED PHYSICS,ASSOC.PROFESSOR, 物理工学系, 助教授 (50018040)
犬竹 正明  筑波大学, 物理工学系, 助教授 (90023738)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥20,500,000 (Direct Cost: ¥20,500,000)
Fiscal Year 1994: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1993: ¥18,000,000 (Direct Cost: ¥18,000,000)
KeywordsPLASMA HEAT LOAD / PLASMA POTENTIAL / THERMAL DIKE / MESH BLASING / SECONDARY ELECTRON SUPPRESSION / DIVERTER / ECRH / OPEN MAGNETIC FIELD / 電位 / 熱流 / 沿磁場輸送 / 磁気ミラー / 電子サイクロトロン共鳴加熱 / エンドプレートバイアス
Research Abstract

The purpose of this research program is to investigate physical mechanisms of rapid energy transort along magnetic field lines in plasmas under controlled experimental conditions. This type of heat transport is observed in a variety of magnetized plasmas, and it is closely connected with the formation of potential distribution along the open field lines. The experiments are made in the large-scale west end plasma region in the GAMMA10 tandem mirror in PRC,Univ.of Tsukuba. The control knobs, developed for the experiment, are 2.45GHz Electron Cyclotron Resonance Heating (ECRH) system for THERMAL DIKE and MESH BIAS system. Special concern in this study lies in convective heat transport associated with particle exchange of hot electrons that hit end plates with cold electrons abundantly produced via secondary emissions. TD enhances magnetic mirror reflections and MB increases electrostatic reflection of the cold electrons so as to reduce the exchange rate of the two classes of electrons. M … More B deepens the depth of floating potential of the endplates, so that the warm electron flux reaching the endplates decreases to about a half. The effective temperature of the electrons increases with MB.Most of the heat flux is attributed to the convective electron transport because the ion flux remains much smaller than the flux of impinging primary electrons. The reduction of the heat load to the plate is also observed with a thermo-couple arry and with infra-red camera. These results demonstrate the effectiveness of MB in reducing the heat flux in plasmas. But, since the decrement of the temperature-rise is smaller than that evaluated from the particle analyzes, further tests are required on the temperature diagnostics. It may also indicate that other heat channels are active than those watched with the particle analyzers.
TD deepens the endplate potential by about 10% while the primary electron flux does not always decrease. The endplate temperature tends to decrease as a whole, though under some plasma conditions it increases, These observations motivated detailed analyzes of dynamics of primary electrons under ECRH.Using newly developed theoretical tools of a potential model and heating response function, we found that these electrons are transformed to Yushmanov particles subject to multiple heating and partially driven to the endplates, increasing heat-load. Local tailoring of the magnetic field profile at the resonance is found to be effective in increasing the benefit of TD. Less

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (34 results)

All Other

All Publications (34 results)

  • [Publications] Y.Tatematsu,Y.Kiwamoto,T.Saito,T.Tamano: "Effects of Yushmanov-Trapped Particles and Anisotropy of Velocity Distribution on the Potential Formation in the End Region of a Tandem Mirror" Journal of the Physical Society of Japan. 63. 558-572 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kiwamoto,T.Saito,Y,Tatematsu,I.Katanuma,Y.Yoshimura,T.Tamano: "Electron Cyclotron Resonance Heating by Strong Monochromatic Wave in Nonuniform Magnetic Field" Physics of Plasmas. 1. 834-841 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kiwamoto,Y,Tatematsu,T.Saito,I.Katanuma,Y.Yoshimura,T.Tamano: "Theoretical Analysis of Thermal Dike Supported by Electron Cyclotron Resonsnce Heating" Physics of Plasmas. 1. 3986-3995 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Yasaka,O.Sakai,H.Takeno,H.Hojo: "Selective Ion and Electron Heating and Potential Formation Using Mode Conversions of ICRF Waves in HIEI"," Nuclear Fusion. 34. 1263-1269 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Saito,Y.Kiwamoto,Y,Tatematsu,Y.Yoshimura,M.Inutake,T.Tamano: "Suppression of Secondary Electrons from an Endplate by Use of a Biased Mesh." Physics of Plasmas. 2. 352-354 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y,Tatamatsu,Y.Kiwamoto,T.Saito,Y.Yoshimura,M.Inutake,I.Katanuma,T.Tamano: "Control of Plasma Transport by Active Tailoring of Potential Profile along Open Magnetic Field" Journal of Nuclear Materials. (in press). -5 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Saito, Y.Kiwamoto, K.Kurihara, T.Cho, M.Inutake, S.Miyoshi, T.Tamano, and K.Yatsu: "Scaling Study of Potential in the End region of a Tandem Mirror Based on End Loss Electron Measurement" Physics of Fluids B. Vol.5, No.3. 866-871 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Tamano: "Plasma Production in Fusion Devices : Magnetic Confinement" Journal of Plasma and Fusion Research. Vol.69, No.8. 923-927 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] I.Katanuma, Y.Kiwamoto, N.Ohyabu, K.Ishii, K.Yatsu, and T.Tamano: "Electron Confining Potential When the Electrons Have Finite Axial Loss Time" Journal of the Physical Society of Japan. Vol.62, No.10. 3446-3459 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] I.Katanuma, Y.Kiwamoto, L.G.Bruskin, K.Yatsu, and T,Tamano: "On the Continuity of electrostatic potential along a Magnetic Field" Journal of the Physical Society of Japan. Vol.63, No.2. 393-396 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Tatematsu, Y.Kiwamoto, T.Saito, and T.Tamano: "Effects of Yushmanov-Trapped Particles and Anisotropy of Velocity Distribution on the Potential Formation in the End Region of a Tandem Mirror" Journal of the Physical Society of Japan. Vol.63, No.2. 558-572 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Kiwamoto, T.Saito, Y.Tatematsu, I.Katanuma, Y.Yoshimura, and T.Tamano: "Electron Cyclotron Resonance Heating by Strong Monochromatic Wave in Nonuniform Magnetic Field" Physics of Plasmas. Vol.1, No.4. 834-841 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Yasaka, O.Sakai, H.Takeno, and H.Hojo: "Selective Ion and Electron Heating and Potential Formation Using Mode Conversions of ICRF Waves in HIEI" Nuclear Fusion. Vol.34, No.9. 1263-1269 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] O.Sakai and Y.Yasaka: "Mode conversion of fast magnetosonic waves and minority ion heating in a longitudinally inhomogeneous magnetic field" Physics of Plasmas. Vol.1, No.12. 3896-3904 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Kiwamoto, Y.Tatematsu, T.Saito, I.Katanuma, Y.Yoshimura, and T.Tamano: "Theoretical Analysis of Thermal Dike Supported by Electron Cyclotron Resonance Heating" Physics of Plasmas. Vol.1, No.12. 3986-3955 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Takeno, Y.Yasaka, O.Sakai, and R.Itatani: "High density central cell plasma production and ion heating by helicon wave damping and its mode conversion into a slow Alven wave" Nuclear Fusion. Vol.35, No.1. 75-85 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Saito, Y.Kiwamoto, Y.Tatematsu, Y.Yoshimura, T.Takahashi, M.Inutake, and T.Tamano: "Suppression of Secondary Electrons from an Endplate by Use of a Biased Mesh" Physics of Plasmas. Vol.2, No.2. 352-354 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Tatematsu, Y.Kiwamoto, T.Saito, Y.Yoshimura, T.Takahashi, I.Katanuma, M.Inutake, and T.Tamano: "Control of Plasma Transoprt by Active Tailoring of Potential Profile along Open Magnetic Field" Journal of Nuclear Materials. (in press). 5 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Tamano: "Tandem Mirror Experiments in GAMMA10" Physics of Plasmas. Vol.2, No.6. 9 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Tamano, et.al.: "Recent Results of Tandem Mirror Experiments in GAMMA10 and HIEI" Proc.15th Conf.on Plasma Physics and Controlled Nucl.Fusion Res.at Seville, Spain (1994) /IAEA-CN-60/C-I-I.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Tamano,et.al.: "Recent Results of Tandem MirrorExperiments in GAMMA10 and HIEI" Proc.15th Conf.on PIasma Phys.and Controlled Nucl.Fusion Res.(1994)atSeville.Spain.IAEA-CN-60/C-1-1. -5 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Tamano: "Tandem Mirror Experiments in GAMMA10((Invited Talk in APS)" Physics of Plasmas. 2(June). -9 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Kiwamoto,Y.Tatematsu,T.Saito,T.Tamano,et.al.: "Theoretical Analysis of ThermalDike Supported by Electron Cyclotron Resonsnce Heating" Physics of Plasmas. 1. 3986-3995 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Yasaka,O.Sakai,H.Takeno.H.Hojo: "Selective Ion and Electron Heating and Potential Formation Using Mode Conversions of ICRF Waves in HIEI"." Nuclear Fusion. 34. 1263-1269 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Saito,Y.Kiwamoto,Y.Tate-matsu,T.Tamano,et.al.: "Suppression of Secondary Electrons from an Endplate by Use of a Biased Mesh." Physics of Plasmas. 2. 352-354 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Tatamatsu,Y.Kiwamoto,T.Saito,T.Tamano,et.al.: "Control of Plasma Transport by Active Tailoring of Potential Profile along Open Magnetic Field" Journal of Nuclear Materials. (in press). -5 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Kiwamoto: "Electron Cyclotron Resonance Heating for Controlling Potential and Transport along Open Field Lines" Proc.IAEA Technical Committee Meeting on RF Launchers for Plasma Heating and Current Drive(Nov.10-12,1993 at JAERI,Naka).(1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Saito: "ECRH Experiments in the GAMMA 10 Tandem Mirror" Proc.5th International Toki Conf.on Plasma Physics and Controlled Nuclear Fusion(ITC-5).Nov.16-19,1993,Toki,Japan.(1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 際本泰士: "プラズマ中に静電位分布を発生する" 日本物理学会誌. 49. 10-17 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Y.Tatematsu: "Effects of Yushimanov-Trapped Particles and Anisotropy of Velocitv Distribution on the Potential Formation in the End Region of a Tandem Mirror" Journal of Physical Soc.Japan. 63. 558-572 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Y.Kiwamoto: "Electron Cyclotron Resonance Heating by Strong Monochromatic Wave in Nonuniform Magnetic Field" Physics of Fluids B. 6. NO.4 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 玉野輝男: "核融合装置のプラズマ生成-磁場閉じ込め" J.Plasma Fusion Res.69. 923-927 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] I.Katanuma: "Electron Confining Potential When the Electron Have Finite Axial Loss Time" Journal of Physical Soc.Japan. 62. 3446-3459 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] I.Katanuma: "On the Continuity of Electrostatic Potential around Magnetic Mirror Throat" Journal of Physical Soc.Japan. 63. 393-396 (1994)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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