JFT-2Mにおけるフェライト鋼装着によるリップル低減試験  [in Japanese] Ripple Reduction Test by Ferritic Steel Board Insertion in the JFT-2M Tokamak  [in Japanese]

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Author(s)

Abstract

Ripple reduction test by ferritic steel board(FB)insertion between toroidal field coils and vacuum vessel has been carried out in the JFT-2M tokamak. The magnetic analysis and probe measurement indicated that the ripple magnitude was reduced from 2.2% to 1.1% by the FB insertion. Increment of the first wall temperature caused by ripple trapped or banana drift fast ions was measured by the infrared TV camera during neutral beam injection. After the FB insertion, the maximum temperature increment was decreased from 75°C to 50°C in ripple trapped loss region and from 150°C to 100°C in banana drift loss region, respectively. The temperature decrement in ripple trapped loss region indicated that the heat load was reduced about half. It was confirmed that ripple trapped losses decreased with decrease of the safety factor or the ripple magnitude according to the ripple well parameter. In addition, FB insertion did not only give any adverse effect on the plasma discharge and confinement but also increased the edge toroidal rotation speed about twice faster than that before FB insertion during ELM free H-mode.

Journal

  • Journal of plasma and fusion research

    Journal of plasma and fusion research 76(6), 585-592, 2000-06-25

    プラズマ・核融合学会

References:  21

Cited by:  1

Codes

  • NII Article ID (NAID)
    110003825414
  • NII NACSIS-CAT ID (NCID)
    AN10401672
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    09187928
  • NDL Article ID
    5391947
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z15-8
  • Data Source
    CJP  CJPref  NDL  NII-ELS  NDL-Digital 
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