Modification of Electron Density Profile during Lower Hybrid Current Drive in JT-60U

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Abstract

Particle transport is one of the most important issues in the nuclear fusion research. A significant change in an electron density profile, suggesting a change in particle transport, has been observed in many auxiliary heating experiments. In the JT-60U tokamak modifications of an electron density profile during lower hybrid current drive (LHCD) were observed. In order to clarify experimental conditions on which this phenomenon mainly depends, a series of systematic investigations was carried out. As the results, the change in the density profile was found to depend on the input wave power, the wave spectrum, and the plasma current or the toroidal magnetic field. The decrease in the density in the central region was found to be larger when hard X-ray emission became centrally peaked both in normal- and anti-directional current drive experiments. Therefore this phenomenon appears to be related to the existence of high energy electrons produced by the waves rather than to the change in the LH driven current. Details of the experiments are presented in this paper.

Journal

  • Journal of plasma and fusion research

    Journal of plasma and fusion research 73(1), 112-121, 1997-01-25

    プラズマ・核融合学会

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Codes

  • NII Article ID (NAID)
    110003827434
  • NII NACSIS-CAT ID (NCID)
    AN10401672
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    09187928
  • NDL Article ID
    4127329
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z15-8
  • Data Source
    CJP  NDL  NII-ELS  NDL-Digital 
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