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Alfvén Continuum and Alfvén Eigenmodes in the National Compact Stellarator Experiment

Authors: O.P. Fesenyuk, Ya.I. Kolesnichenko, V.V. Lutsenko, R.B. White, and Yu.V. Yakovenko

Date of PPPL Report: September 2004

Published in: Phys. Plasmas 11:12 (December 2004) 5444-5451.

The Alfvén continuum (AC) in the National Compact Stellarator Experiment (NCSX) is investigated with the AC code COBRA. The resonant interaction of Alfvén eigenmodes and the fast ions produced by neutral beam injection is analyzed. Alfvén eigenmodes residing in one of the widest gaps of the NCSX AC, the ellipticity-induced gap, are studied with the code BOA-E.