On the Helical MHD Mode in a Finite-Conductivity Tokamak Plasma View Full Text


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Article Info

DATE

2018-10

AUTHORS

V. V. Arsenin

ABSTRACT

A helical MHD perturbation in a finite-conductivity tokamak plasma has been considered in the straight-cylinder model in a situation where there is no resonance surface q = m/n in plasma. The radial eigenfunction of the helical mode, in addition to the large-scale component described at σ||→ ∞ by the ideal MHD equation, contains a small-scale component localized near the wall and near discontinuities in the radial profiles of the unperturbed quantities. At smooth profiles, the small-scale component is attached to the wall and is smaller in magnitude than the large-scale component. Therefore, beyond a thin near-wall plasma layer, the mode is close to the large-scale ideal MHD mode. The presence of the small-scale component is necessary to satisfy the boundary conditions for the perturbed field on the wall. More... »

PAGES

996-999

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1063780x1810001x

DOI

http://dx.doi.org/10.1134/s1063780x1810001x

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1107640957


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