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Bifurcation of the resistive Alfvén wave spectrum
Journal of Plasma Physics
A phase integral (WKBJ) theory of damped modes in a resistive cylindrical plasma column is developed. The theory predicts several phenomena observed previously in numerical studies: (i) the complex frequency w has a point spectrum lying on a locus which is approximately independent of the resistivity, and which intersects the ideal continuum only at its end points (at angles of 45° and 30°); (ii) the qualitative features are independent of current profile and m-number, provided | k . B | isdoi:10.1017/s0022377800002191 fatcat:sniym2pmgfe7xmjjfi3eqp7pli