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Author(s):
H. Soltwisch, K. Tanaka
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Title:
Changes of the Electron Density Distribution during MHD Activity in CHS
Date of publication:
Sep. 2000
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Key words:
CHS, HCN Iaser interferometer, MHD activity, sawteeth, MHD burst
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Abstract:
Density oscillations induced by MHD activities were observed in NBI heated plasmas on CHS by using an HCN laser interferometer. The accompanied changes of the density profiles were also observed. The oscillations are composition of m=0 sawteeth like crash and m=2 sinusoidal oscillations as a post courser of the crash. Possible models of the oscillation structure are examined in order to explain experimental data of the interferometer. Rotating plasma core, which is hollow profile and keeps constant elongation of the flux surface can explain amplitude and phase distribution of the sinusoidal oscillation.
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