Interchange and Infernal Fishbone Modes in Plasmas with Tangentially Injected Beams
Authors: Ya.I. Kolesnichenko, V.S. Marchenko, and R.B. White
Abstract:
New energetic particle mode instabilities of fishbone type are predicted. The considered instabilities are driven by the circulating energetic ions. They can arise in plasmas of tokamaks and spherical tori with weak magnetic shear in the wide core region and strong shear at the periphery, provided that the central safety factor is close to the ratio m/n, where m and n are the poloidal mode number and toroidal mode number, respectively. The instability with m = n = 1 has interchange-like spatial structure, whereas the structure of instabilities with m/n > 1 is similar to that of the infernal MHD mode (except for the region in vicinity of the local Alfvén resonance).
Phys. Plasmas 13, 052504 (2006)
© 2006 American Institute of Physics
DOI:10.1063/1.2198207
Download PPPL Report Pre-print January 2006 (pdf 963 Kb)