Instantaneous Correlation between ELM-like MHD Activity and Abrupt Non-local Reduction of Transport at Internal Transport Barrier Formation in JT-60U High-β_p Plasmas

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Author(s)

Abstract

Transport evolution in normal and reversed shear JT-60U tokamak plasmas with internal transport barrier (ITB) often occurs via non-local transport bifurcations. In the present paper, we highlight new type of edge-core instantaneous interplay in JT-60U high-β<SUB>p</SUB> plasmas. Abrupt in time (ms timescale) and wide in space (˜0.4 of minor radius) reduction of electron heat flux in the core (ITB-event) is correlated in ms timescale with the start of an ELM that creates enhanced level of H<SUB>α</SUB>. This result gives a hint of the control to form the ITB immediately and non-locally by inducing the ELM-like MHD activity.

Journal

  • Journal of Plasma and Fusion Research

    Journal of Plasma and Fusion Research 79(12), 1218-1220, 2003-12-25

    The Japan Society of Plasma Science and Nuclear Fusion Research

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Codes

  • NII Article ID (NAID)
    10012479213
  • NII NACSIS-CAT ID (NCID)
    AN10401672
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    09187928
  • NDL Article ID
    6811388
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z15-8
  • Data Source
    CJP  NDL  J-STAGE 
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