MHD Instabilities in Tokamak Plasmas with Hollow Current Density Profiles

MHD Instabilities in Tokamak Plasmas with Hollow Current Density Profiles

We analyze linear instability in low beta tokamak plasmas with nonmonotonic q-profiles using resistive magnetohydrodynamic equations. We consider n = 2 (where n is the toroidal mode number) modes for configurations where qmin is close to 1.5 and sufficiently below 2 so that the separation of the rat...

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Veröffentlicht in:Plasma and Fusion Research 2013/11/15, Vol.8, pp.1403156-1403156
Hauptverfasser: YAMADA, Goshi, NAKAMURA, Yuji, KONDO, Katsumi
Format: Artikel
Sprache:eng
Schlagworte:
linear instability
low beta plasma
nonmonotonic safety factor profile
resistive MHD
tokamak
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Zusammenfassung:We analyze linear instability in low beta tokamak plasmas with nonmonotonic q-profiles using resistive magnetohydrodynamic equations. We consider n = 2 (where n is the toroidal mode number) modes for configurations where qmin is close to 1.5 and sufficiently below 2 so that the separation of the rational surfaces with q = 2 is large. Similar instability characteristics arise when qmin is slightly and moderately above 1.5.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.8.1403156