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.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
Farina, D., Kotelnikov, I., & Pozzoli, R. (1999). Dynamics of fast magnetosonic perturbations close to an X-X separatrix. Journal of Plasma Physics, 61(5), 761 - 770. https://doi.org/10.1017/S0022377899007680