Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Physics of Fluids
30 (1987), S. 1489-1496
ISSN:
1089-7666
Source:
AIP Digital Archive
Topics:
Physics
Notes:
For sustained discharges at high values of the pinch parameter aitch-theta large disturbances appear on the plasma current, loop voltage, and toroidal magnetic field signals. An increase of both plasma resistance and magnetohydrodynamic (MHD) activity measured at the edge is observed. The onset of such phenomena is found at values of aitch-theta〉1.5 and the amplitude of the disturbances increases with aitch-theta. The oscillations are interpreted as the effect of major current redistributions occurring periodically in the central region of the plasma. Relating experimental field profiles and aitch-theta values, the effect of the current redistribution is the recovery of the on axis q value when a lower limit is exceeded. From the experimental measurements such a lower limit has been found to be approximately q(0)≥2a/(3R).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.866262
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