Toroidal Electric Field Effect and Non-Linear Effect on Electron Cyclotron Current Drive in the JT-60U

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Author(s)

Abstract

Recent progress in the development of electron cyclotron heating⁄current drive systems in regard to power and pulse duration have allowed the extension of two normalized parameters (toroidal electric field E<sub>φ</sub> and wave power density p). In the extended regime, the conventional theory requires consideration of a distorted electron distribution function. The first validation of the ECCD theory in the extended regime having large E<sub>φ</sub> and p is presented. Linear calculation has a tendency to overestimate the EC driven current, as normalized parameters for E<sub>φ</sub> and p increase. While the EC driven current I<sub>EC</sub> obtained by a linearized Fokker-Planck calculation (1.1 MA) did not agree with the measured EC driven current (0.74 ± 0.06MA), non-linear calculation of the Fokker-Planck equation considering the effect of E<sub>φ</sub> (0.76 MA) shows close agreement with the experimental result. Calculations show that the decreasing effect of E<sub>φ</sub> on I<sub>EC</sub> was stronger than the increasing effect of p on I<sub>EC</sub> in the experiment.

Journal

  • Journal of Plasma and Fusion Research

    Journal of Plasma and Fusion Research 80(6), 511-515, 2004-06-25

    The Japan Society of Plasma Science and Nuclear Fusion Research

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Codes

  • NII Article ID (NAID)
    110003827720
  • NII NACSIS-CAT ID (NCID)
    AN10401672
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    09187928
  • NDL Article ID
    7011429
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z15-8
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE  NDL-Digital 
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