Observation of Edge Reynolds Stress Increase Preceding an L-H Transition in Compact Helical System

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Author(s)

    • NAGASHIMA Yoshihiko
    • Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 509-5292, Japan
    • TAKASE Yuichi
    • Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 509-5292, Japan
    • EJIRI Akira
    • Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 509-5292, Japan
    • ITOH Sanae -I.
    • Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
    • YAGI Masatoshi
    • Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
    • CHS Group
    • National Institute for Fusion Science, Toki 509-5292, Japan
    • ITOH Kimitaka
    • National Institute for Fusion Science, Toki 509-5292, Japan
    • FUJISAWA Akihide
    • Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan

Abstract

An increase in turbulent Reynolds stress preceding an L-H transition in the Compact Helical System (CHS) was observed. A positive increase in the Reynolds stress is associated with a negative jump in the floating potential. The relationship of signs is consistent with the momentum balance equation. Therefore, this observation supports the hypothesis that the Reynolds stress plays an important role in triggering the L-H transition in CHS plasmas.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research (5), 022-022, 2010

    The Japan Society of Plasma Science and Nuclear Fusion Research

Codes

  • NII Article ID (NAID)
    130000309235
  • Text Lang
    ENG
  • Data Source
    J-STAGE 
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