IAEA Fusion Energy Conference 2010Proceedings of the 23rd IAEA Fusion Energy ConferenceDaejeon, 1116 October 2010 Organized by the
International Atomic Energy Agency IAEACN180 (THS/P514) Analytic Theory of a Matching Problem Generalized for Stability Analysis of Resistive Wall Modes in Rotating PlasmasJ. Shiraishi^{1)}, S. Tokuda^{1)2)}^{1)} Japan Atomic Energy Agency, Naka, Japan ^{2)} Research Organization for Information Science and Technology, Tokyo, Japan
Abstract. New matching theory is proposed for stability analysis of
Resistive Wall Modes (RWMs) in rotating plasmas. It is found that for
rotating plasmas, the classical asymptotic matching theory becomes
invalid in principle. The matching problem should be generalized to
use inner layers with finite width to overcome the difficulty that a
resonant surface, which exists somewhere in finite distance apart from
the rational surface depending on the unknown rotation frequency of
the RWM, should be included in the layers. For the first time,
numerical analysis based on the generalized matching problem shows
that the location of resonance determined by rotation in the inner
layer significantly affects the stability of RWMs. Analytic theory for
the generalized matching problem is developed to interpret the results
by generalized matching problem and to search the unknown location of
the resonant surface.
Full paper available (PDF)

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