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2002 Fiscal Year Final Research Report Summary

Study on enhancement of current drive efficiency in long RF current drive plasmas

Research Project

Project/Area Number 13680559
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field プラズマ理工学
Research InstitutionKyushu University

Principal Investigator

HANADA Kazuaki  Kyushu University, Research Institute for Applied Mechanics, Professor, 応用力学研究所, 教授 (30222219)

Co-Investigator(Kenkyū-buntansha) SAKAMOTO Mizuki  Kyushu University, Research Institute for Applied Mechanics, Associate Professor, 応用力学研究所, 助教授 (30235189)
ZUSHI Hideki  Kyushu University, Research Institute for Applied Mechanics, Professor, 応用力学研究所, 教授 (20127096)
NAKAMURA Kazuo  Kyushu University, Research Institute for Applied Mechanics, Professor, 応用力学研究所, 教授 (30117189)
HASEGAWA Makoto  Kyushu University, Research Institute for Applied Mechanics, Instructor, 応用力学研究所, 助手 (00325482)
JOTAKI Eriko  Kyushu University, Research Institute for Applied Mechanics, Associate Professor, 応用力学研究所, 助教授 (40211297)
Project Period (FY) 2001 – 2002
KeywordsTokamak / current drive / energetic electrons / confinement / thermal input / lower hybrid wave / spectrum gap
Research Abstract

Steady state operation of tokamak is a key for the realization of cost-effective fusion power plant. TRIAM-1M (R=0.8m, a x b = 0.12 x 0.18m, B_t<8T) is positively tackled with the study of LH current drive The enhanced current drive (ECD) mode which accompanied with the improvement of energy confinement, could be observed.
The direct loss of passing energetic electrons may play an essential role in reduction of current drive efficiency. Therefore, the measurements of the confinement time of energetic electrons are important.
The absolute value of the prompt loss of energetic electrons was measured as the thermal input on the movable limiter located in the low field side of the plasma. In fact, the measurement was carried out in the plasma sustained by injected RF power of 65 kW and the estimated stored energy of energetic electron was about 500 J. The measured heat flux is about 0.5 kW and most of the thermal input to the movable limiter came from SOL plasma. In addition, ripple loss of energetic electron is enhanced in ECD mode.
This clearly shows that the improvement of the loss of energetic electrons does not play a significant role in the enhancement of current drive efficiency.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] K.Hanada, et al.: "Measurement of prompt loss of energetic electrons in a long LHCD discharge on TRIAM-1M"Proc.29^<th> European Physical Society Conference on Plasma Physics and Controlled Fusion. 2.085 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Zushi, et al.: "Overview of steady state tokamak plasma experiments on TRIAM-1M"Proc.19^<th> IAEA Fusion Energy Conference, Lyon, France, 14-19 October 2002. IAEA-CN-94. OV/4-OV/6 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Hanada, et al.: "Current ramp-up experiments in full current drive plasmas on TRIAM-1M"Proc.19^<th> IAEA Fusion Energy Conference, Lyon, France, 14-19 October 2002. IAEA-CN-94. EX/P4-EX/P15 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Sakamoto, et al.: "Grobal particle balance and wall recycling properties of long duration discharges on TRIAM-1M"Proc.19^<th> IAEA Fusion Energy Conference, Lyon, France, 14-19 October 2002. IAEA-CN-94. EX/P4-EX/P07 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Sakamoto, et al.: "Static and dynamic properties of wall recycling in TRIAM-1M"J.Nucl.Material. 313-316. 588-594 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Hanada, et al.: "Enhancement of RF current drive efficiency on TRIAM-1M"Nuclear Fusion. 41・11. 1539-1542 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Hanada, et al.: "Measurement of prompt loss of energetic electrons in a long LHCD discharge on TRIAM-1M"Proc. 29^<th> European Physical Society Conference on Plasma Physics and Controlled Fusion. P-2.085. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Zushi, et al.: "Overview of steady state tokamak plasma experiments on TRIAM-1M"Proc. 19^<th> IAEA Fusion Energy Conference, Lyon, France, 14-19 October 2002. IAEA-CN-94. OV/4-6 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Hanada, et al.: "Current ramp-up experiments in full current drive plasmas on TRIAM-1M"Proc. 19^<th> IAEA Fusion Energy Conference, Lyon, France, 14-19 October 2002. IAEA-CN-94. EX/P4-15 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Sakamoto, et al.: "Grobal particle balance and wall recycling properties of long duration discharges on TRIAM-1M"Proc. 19^<th> IAEA Fusion Energy Conference, Lyon, France, 14-19 October 2002. IAEA-CN-94. EX/P4-07 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Sakamoto, et al.: "Static and dynamic properties of wall recycling in TRIAM-1M"J. Nucl. Material. 313-316. 588-594 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Hanada, et al.: "Enhancement of RF current drive efficiency on TRIAM-1M"Nuclear Fusion. 41-11. 1539-1542 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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