Evaluation of <i>Z</i><sub>eff</sub> Profile in Low-Density and High-<i>T</i><sub>i</sub> Discharges with Carbon Pellet Injection based on Space-Resolved EUV Spectroscopy in LHD

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Author(s)

    • HUANG Xianli
    • Department of Fusion Science, Graduate University for Advanced Studies
    • MORITA Shigeru
    • Department of Fusion Science, Graduate University for Advanced Studies|National Institute for Fusion Science
    • OISHI Tetsutarou
    • Department of Fusion Science, Graduate University for Advanced Studies|National Institute for Fusion Science
    • GOTO Motoshi
    • Department of Fusion Science, Graduate University for Advanced Studies|National Institute for Fusion Science
    • ZHANG Hongming
    • Department of Fusion Science, Graduate University for Advanced Studies

Abstract

<p><i>Z</i><sub>eff </sub>profile analysis has been carried out in a low-density and high-<i>T</i><sub>i </sub>discharge with carbon pellet injection. The evolution of the <i>Z</i><sub>eff </sub>profile shows a centrally peaked profile just after the pellet injection while the profile gradually returns to an original flat profile as a function of time. Comparison between the evolution of <i>Z</i><sub>eff </sub>and <i>T</i><sub>i </sub>profiles in the plasma center strongly suggests that there is a positive relation between <i>Z</i><sub>eff </sub>and <i>T</i><sub>i</sub>.</p>

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 10(0), 3402036-3402036, 2015

    The Japan Society of Plasma Science and Nuclear Fusion Research

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