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Dynamics of fast magnetosonic perturbations close to an X–X separatrix

Published online by Cambridge University Press:  01 June 1999

D. FARINA ,
I. KOTELNIKOV  and
R. POZZOLI
D. FARINA
Affiliation:
Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, EURATOM–ENEA–CNR Association, via Cozzi 53, 20125 Milano, Italy
I. KOTELNIKOV
Affiliation:
Budker Institute of Nuclear Physics, 630090, Novosibirsk, Russian Federation
R. POZZOLI
Affiliation:
Istituto Nazionale di Fisica della Materia, Dipartimento di Fisica, Università di Milano, via Celoria 16, 20133 Milano, Italy
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Abstract

The structure of magnetosonic perturbations around a pair of X lines of a toroidal magnetic configuration is analysed in the framework of ideal MHD, by means of a WKB technique. The conditions for wave trapping are investigated. It is shown that the wave equation for the displacement is separable in the vicinity of the X lines. The relevant eigenvalues and the different types of ray trajectories are discussed.

Type
Research Article
Information
Journal of Plasma Physics , Volume 61 , Issue 5 , June 1999 , pp. 761 - 770
Copyright
1999 Cambridge University Press

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