Three-Dimensional Corrugation of the Plasma Edge when Magnetic Perturbations are Applied for Edge-Localized Mode Control in MAST

The distortion of the plasma boundary when three-dimensional resonant magnetic perturbations (RMPs) are applied has been measured in MAST H-mode plasmas. When the n = 3 RMPs are applied to control edge-localized modes (ELMs), the plasma experiences a strong toroidal corrugation. The displacement of the plasma boundary is measured at various toroidal locations and found to be of the order of 5% of the minor radius for an applied field magnitude which mitigates ELMs. The empirically observed corrugation of the plasma edge position agrees well with three-dimensional ideal plasma equilibrium reconstruction.


Published in:
Plasma Physics and Controlled Fusion, 54, 105103
Year:
2012
Publisher:
Bristol, Institute of Physics
ISSN:
0741-3335
Keywords:
Laboratories:
SPC
CRPP




 Record created 2012-10-26, last modified 2018-01-28


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