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Alfvén continuum and Alfvén eigenmodes in the National Compact Stellarator Experiment

2004; American Institute of Physics; Volume: 11; Issue: 12 Linguagem: Inglês

10.1063/1.1806136

1527-2419

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

Laser-induced spectroscopy and plasma

The Alfvén continuum (AC) in the National Compact Stellarator Experiment (NCSX) [G. H. Neilson et al., in Fusion Energy 2002, 19th Conference Proceedings, Lyon, 2002 (International Atomic Energy Agency, Vienna, 2003), Report IAEA-CN-94/IC-1] is investigated with the AC code COBRA [Ya. I. Kolesnichenko et al., Phys. Plasmas 8, 491 (2001)]. 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 gap of the NCSX AC, the ellipticity-induced gap, are studied with the code BOA-E [V. V. Lutsenko et al., in Fusion Energy 2002, 19th Conference Proceedings, Lyon, 2002 (International Atomic Energy Agency, Vienna, 2003), Report IAEA-CN-94-TH/P3-16].