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Heat and Particle Control of High-Temperature Plasmas

Research Project

Project/Area Number 05044115
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionNational Institute for Fusin Science

Principal Investigator

KURODA Tsutomu  National Institute for Fusion Science Professor, 開発研究系, 教授 (00023713)

Co-Investigator(Kenkyū-buntansha) SOLTWISCH H.K.A.  Institute of Plasma Physics, Research Center of Julich, プラズマ研究所, 研究員
ESSER H.G.  Institute of Plasma Physics, Research Center of Julich, プラズマ研究所, 研究員
WINTER J.  Institute of Plasma Physics, Research Center of Julich, プラズマ研究所, 研究員
PHILIPPS V.  Institute of Plasma Physics, Research Center of Julich, プラズマ研究所, 研究員
FINKEN K.H.  Institute of Plasma Physics, Research Center of Julich, プラズマ研究所, 研究員
KOGOSHI Sumio  Tokyo Science and Technol, 理工学部, 助教授 (60134459)
BANNO Tatsuya  Faculty of Engineering, Tokyo University, 工学部, 講師 (70189736)
SHOJI Tatsuo  Faculty of Engineering, Nagoya University, 工学部, 助教授 (50115581)
NODA Nobuaki  National Institute for Fusion Science, プラズマ制御研究系, 教授 (10144172)
PHILIPPS V  ユーリッヒ総合研究機構, プラズマ研究所, 研究員
上田 良夫  大阪大学, 工学部, 助手 (30193816)
H.G. Esser  ユーリッヒ総合研究機構, プラズマ研究所, 研究員
J. Winter  ユーリッヒ総合研究機構, プラズマ研究所, 研究員
V. Philipps  ユーリッヒ総合研究機構, プラズマ研究所, 研究員
K.H. Finken  ユーリッヒ総合研究機構, プラズマ研究所, 研究員
Project Period (FY) 1993 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥9,000,000 (Direct Cost: ¥9,000,000)
Fiscal Year 1995: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1994: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1993: ¥3,000,000 (Direct Cost: ¥3,000,000)
Keywordsfusion plasma / pump limiter / hydrogen pellet / refractory metal / rf limiter / heat and particle control / boundary plasma / plasma wall interaction / 熱・粒子制御
Research Abstract

A toroidal belt limiter with a pumping system have been utilize to control heat and particle fluxes from high temperature plasmas in TEXTOR.It has been confirmedwith particle balance analysis that hydrogen recycling at the wall is reduced just after the pellet injection and after helium injection.
High Z test limiter experiments indicated that tungsten or molybdenum accumulation occasionally takes place in L mode discharges.But it causes a deleterious effect on plasma performance in only limited cases such as in high density, ohmically heated operation etc.Observed short range in sputterd neutral Mo atoms indicates prompt redeposition of Moions.This results in low erosion rate of the surface and little penetration of impurity atoms into plasma boundary.
RF biasing to a limiter head reduced density and particle flux to the limter head.However, reduction of het flux has not yet been verified in spite of an expectation from based on a theoretical consideration.
Through this collaboration study, some of beneficial effects have been confirmed experimentaly for pump-limiter combined with pellet fuelling, high Z limiter materials, RF biasing to the limiter head, as is above noted.Among the results above noted, the high Z limiter study attracts a lot of worldwide interests in these days.Many new programs of high Z study have been started in several tokamaks under direct influence of this TEXTOR collaboration.In TEXTOR,a design of an advanced limiter system is stated based on the results above noted.

Report

(3 results)
  • 1995 Final Research Report Summary
  • 1994 Annual Research Report
  • 1993 Annual Research Report
  • Research Products

    (42 results)

All Other

All Publications (42 results)

  • [Publications] Tetsuo Tanabe: "High Z Mo-Limiter Test in TEXTOR : Impurity Fluxes, Thermal Response and Postmortem Analysis of Mo-Limiter Head" Journal of Nuclear Materials. 212-215. 1370-1375 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Volker Philipps: "Molybdenum Test Limiter Experiments in TEXTOR" Nuclear Fusion. 34. 1417-1429 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Yoshio Ueda: "Effects of Impurities Released from High Z Test Limiter on Plasma Performance in TEXTOR" Journal of Nuclear Materials. 220-222. 240-243 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] R.Koch: "Recent Results on Ion Cycoltron and Combined Heating of TEXTOR" Fusion Engineering and Design. 26. 103-120 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tetsuo Tanabe: "High Z Limiter Test in TEXTOR-Thermal Response and Postmortem Analysis" Fusion Engineering and Design. 28. 13-21 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Volker Philipps: "Experiments with Molybdenum and Tungsten Limiters in TEXTOR" Plasma Physics and Controlled Nuclear Fusion Research 1994. (IAEA発刊予定).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Guido Van Oost: "Influence of Different Heating Schemes on High Z Contamination from a Tungsten Test Limiter in TEXTOR" Proc.of 21th EPS Conference on Controlled Fusion and Plasma Physics. 18B Prat II. 1020-1023 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Volker Philipps: "Observation of High Z Impurity Accumulation in Ohmically Heated TEXTOR Discharges" Proc.of 22th EPS Conference on Controlled Fusion and Plasma Physics. 19C Part II. 321-324 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Guido Van Oost: "Auxiliary Heating Experiments with a Tungsten Test Limiter in TEXTOR 94" Proc.of 22th EPS Conference on Controlled Fusion and Plasma Physics. 19C Part III. 345-348 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Michel Z.Tokar: "The Influence of Impurities on Tokamak Plasmas and Relevant Mechanisms" Plasma Physics and Controlled Fusion. 37. A241-A253 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tetsuo Tanabe: "High Z Candidate Materials for Plasma Facing Materials" Supplement of Nuclear Fusion. 5. 129-148 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Nobuaki Noda: "A Review of Recent Experiments on W and High Z Materials as Plasma-Facing Components in Magnetic Fusion Devices" 12th Internaional Conference on Plasma Surface Interactions. (招待講演).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tatuya Banno: "Particle Balance Studies in TEXTOR during Experiments of Pellet Injection, NBI-Heating, Helium Injection, and ICRF Heating" Journal of Nuclear Materials. 220-222. 478-482 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Kenji Nakakita: "Chaotic Propertirs of the Electron Temperature Fulctuation at the Center of TEXTOR Tokamak Plasmas during Sawtooth Activity" Jounal of Plasmas and Fusion Research. 71. 544-560 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Kohnosuke Sato: "Studies on Snake-Like Density Osillations by Pellet Injection in the TEXTOR Plasmas" Proc.of 20th EPS Conference on Controlled Fusion and Plasma Physics. 17C PART I. 239-242 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tatsuo Shoji: "New Method to Improve He-Removal Performance of Pump Limiter by RF Ponderomotive Force" Journal of Nuclear Materials. 220-222. 478-482 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tetsuo Tanabe: "High Z Mo-Limiter Test in TEXTOR : Impurity Fluxes, Thermal Response and Postmortem Analysis of Mo-Limiter Head" Journal of Nuclear Materials. 212-215. 1370-1375 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Volker Philipps: "Molybdenum Test Limiter Experiments in TEXTOR" Nuclear Fusion. 34. 1417-1429 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Yoshio Ueda: "Effects of Impurities Released from High Z Test Limiter on Plasma Performance in EXTOR" Journal of Neclear Materials. 220-222. 240-243 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] R.Koch: "Recent Results on Ion Cyclotron and Combined Heating of TEXTOR" Fusion Engineering and Design. 26. 103-120 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tetsuo Tanabe: "High Z Limiter Test in TEXTOR-Thermal Response and Postmortem Analysis" Fusion Engineering and Design. 28. 13-21 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Volker Philipps: "Experiments with Molybdenum and Tungsten Limiters in TEXTOR" To be published in Plasma Physics and Controlled Nuclear Fusion Research 1994.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Guido Van Oost: "Influence of Different Heating Schemes on High Z Contamination from a Tungsten Test Limiter in TEXTOR" Proc.of 21th EPS Conference on Controlled Fusion and Plasma Physics. 18B PART II. 1020-1023 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Volker Philipps: "Observation of High Z Impurity Accumulation in Ohmically Heated TEXTOR Discharges" Proc.of 22th EPS Conference on Controlled Fusion and Plasma Physics. 19C PART III. 321-324 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Cuido Van Oost: "Auxiliary Heating Experiments with a Tungsten Test Limiter in TEXTOR 94" Proc.of 22th EPS Conference on Controlled Fusion and Plasma Physics. 19C PART III. 345-348 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Michel Z.Tokar: "The Influence of Impurities on Tokamak Plasma and Relevant Mechanisms" Plasma Physics and Conrolled Fusion. 37. A241-A253 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tetsuo Tanabe: "High Z Candidate Materials for Plasma Facing Materials" Supplement of Nuclear Fusion. 5. 129-148 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Nobuaki Noda: "A Review of Recent Experiments on W and High Z Materials as Plasma-Facing Components in Magnetic Fusion Devices" 12th International Conference on Plasma Surface Interactions (invited talk).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tatsuya Banno: "Particle Balance Studies in TEXTOR during Experiments of Pellet Injection, NBI-Heating, Helium Injection, and ICRF Heating" Journal of Nuclear Materials. 220-222. 478-482 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Kenji Nakakita: "Chaotic Propertirs of the Electron Temperature Fluctuation at the Center of TEXTOR Tokamak Plasmas during Sawtooth Activity" Journal of Plasma and Fusion Research. 71. 544-560 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Kohnosuke Sato: "Studies on Snake-Like Density Oscillations by Pellet Injection in the TEXTOR Plasmas" Proc.of 22th EPS Conference on Controlled Fusion and Plasma Physics. 17C PART I. 239-242 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tatsuo Shoji: "New Method to Improve He-Removal Performance of Pump Limiter by RF Ponderomotive Force" Journal of Nuclear Materials. 220-222. 478-482 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Tetsuo Tanabe: "High Z Mo-Limiter Test in TEXTOR:Impurity Fluxes,Thermal Response and Postmortem Analysis of Mo-Limiter Head" Journal of Nuclear Materials. 212-215. 1370-1375 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Yoshio Ueda: "Effects of Immpurities Released from High Z Test Limiter on Plasma Performance in TEXTOR" Journal of Nuclear Materials. (発行予定).

    • Related Report
      1994 Annual Research Report
  • [Publications] Tatsuya Banno: "Particle Balance Studies in TEXTOR with Pellet Injection,NBI-Heating,and Helium Injection" Journal of Nuclear Materials. (発行予定).

    • Related Report
      1994 Annual Research Report
  • [Publications] Volker Philipps: "Molybdenum Test-Limiter Experiments in TEXTOR" Nuclear Fusion. 34. 1417-1429 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Tetsuo Tanabe: "High Z Limiter Test in TEXTOR-Thermal Response and Postmortem Analysis-" Fusion Engineering and Design. (発行予定).

    • Related Report
      1994 Annual Research Report
  • [Publications] Tetsuo Tanabe: "High Z Candidate Materials for Plasma Facing Materials" Supplement of Nuclear Fusion. (発行予定).

    • Related Report
      1994 Annual Research Report
  • [Publications] Tetsuo Tanabe: "High Z Mo-Limiter Test in TEXTOR:Impurity Fluxes,Thermal Response and Postmortem Analysis of Mo-Limiter Head" Journal of Nuclear Materials. (発行予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Yoshio Ueda: "Effects of Impurities Released from High Z Test Limiter on Plasma Performance in TEXTOR" Journal of Nuclear Materials. (発行予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Tatsuya Banno: "Particle Balance Studies in TEXTOR with Pellet Injection,NBI-Heating,and Helium Injection" Journal of Nuclear Materials. (発行予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Volker Philipps: "Molybdenum Test-Limiter Experiments in TEXTOR" Nuclear Fusion. (発行予定).

    • Related Report
      1993 Annual Research Report

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

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