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This paper analyses a means to improve the desired properties of the SOL for heat and particle exhaust. The method is to excite tearing mode islands periodically by a modulation of the plasma current with a rise and a subsequent decay phase. The first phase is intended to generate radially hollow current density profiles, and thus nonmonotonical q-profiles, revealing maxima in the vicinity of the plasma boundary. These tearing mode islands are assumed to dominate the current rise phase by magnetic mixing. The current ramp down phase is needed to retrieve the original q-profile just before the respective current rise phase. Because of the lack of experimental experience this study uses computational results exclusively.

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Authors: NICOLAI A, Forschungszentrum Jülich GmbH, Institut für Plasmaphysik (DE)
Bibliographic Reference: Article: Contributions to Plasma Physics, Vol. 32 (1992) No. 3-4, pp. 491-496
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