• DocumentCode
    1090313
  • Title

    Soft X-Ray Computer Tomography of Double m = 2 Mode During Off-Axis Sawtooth Oscillation With Five Detector Arrays on the WT-3 Tokamak

  • Author

    Yoshimura, Satoru ; Maehara, Tsunehiro ; Maekawa, Takashi

  • Author_Institution
    Sch. of Eng., Osaka Univ., Suita
  • Volume
    36
  • Issue
    4
  • fYear
    2008
  • Firstpage
    1268
  • Lastpage
    1269
  • Abstract
    An off-axis sawtooth oscillation is excited by electron cyclotron heating in a lower hybrid current drive plasma in the WT-3 tokamak. The internal structure of the plasma is investigated using computer tomography with five detector arrays after the application of singular value decomposition to the soft X-ray detector signals. It is found that the precursor oscillation of the off-axis sawtooth collapse is the m=2 mode. On the other hand, the double m=2 mode structure is observed as a post cursor of the collapse.
  • Keywords
    Tokamak devices; computerised tomography; plasma oscillations; sawtooth instability; singular value decomposition; WT-3 tokamak; double m=2 mode; off-axis sawtooth oscillation; singular value decomposition; soft X-ray computer tomography; Computer tomography (CT); off-axis sawtooth oscillation; singular value decomposition (SVD); tokamak;
  • fLanguage
    English
  • Journal_Title
    Plasma Science, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0093-3813
  • Type

    jour

  • DOI
    10.1109/TPS.2008.917166
  • Filename
    4461114
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1090313