Open AccessFast Particle Destabilization of Toroidicity Induced Alfven Eigenmodes in National Spherical Torus Experiment
Author(s) -
C. Z. Cheng,
G. Y. Fu,
M. Gorelenkova,
N.N. Gorelenkov,
R.B. White,
S. Kaye
Publication year - 1999
Language(s) - English
Resource type - Reports
DOI - 10.2172/15103
Subject(s) - physics , gyroradius , torus , toroid , tokamak , amplitude , computational physics , spherical tokamak , normal mode , alfvén wave , magnetic field , atomic physics , quantum electrodynamics , nuclear physics , plasma , quantum mechanics , magnetohydrodynamics , geometry , mathematics , vibration
Toroidicity induced Alfven Eigenmode (TAE) stability in National Spherical Torus Experiment (NSTX) is analyzed using the improved NOVA-K code, which includes finite orbit width and Larmor radius effects and is able to predicts the saturation amplitude for the mode using the quasilinear theory. Broad spectrum of unstable global TAEs with different toroidal mode numbers is predicted. Due to the strong poloidal field and the presence of the magnetic well in NSTX better particle confinement in the presence of TAEs in comparison with tokamaks is illustrated making use of the ORBIT code