[Table of Contents]

Plasma and Fusion Research

Volume 8, 1403156 (2013)

Regular Articles


MHD Instabilities in Tokamak Plasmas with Hollow Current Density Profiles
Goshi YAMADA, Yuji NAKAMURA1) and Katsumi KONDO
1)
Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan
(Received 26 November 2012 / Accepted 13 June 2013 / Published 15 November 2013)

Abstract

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.


Keywords

tokamak, low beta plasma, nonmonotonic safety factor profile, resistive MHD, linear instability

DOI: 10.1585/pfr.8.1403156


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This paper may be cited as follows:

Goshi YAMADA, Yuji NAKAMURA and Katsumi KONDO, Plasma Fusion Res. 8, 1403156 (2013).