Global Hybrid Simulations of Energetic Particle Effects on the n=1 Mode in Tokamaks: Internal Kink and Fishbone Instability

Fu, G.Y. ; Park, W. ; Strauss, H.R. ; Breslau, J. ; Chen, J. ; Jardin, S. ; Sugiyama, L.E.

Princeton University. Plasma Physics Laboratory.

关键词: Fishbone Instability;    Fishbone Instability;    70 Plasma Physics And Fusion Technology;    Experimental Reactors;    Elongation;   

DOI  :  10.2172/842537
RP-ID  :  PPPL-4095
RP-ID  :  AC20-76CH0373
RP-ID  :  842537

美国|英语

来源: UNT Digital Library

【 摘 要 】

Global hybrid simulations of energetic particle effects on the n=1 internal kink mode have been carried out for tokamaks. For the International Thermonuclear Experimental Reactor (ITER) [ITER Physics Basis Editors et al., Nucl. Fusion 39:2137 (1999)], it is shown that alpha particle effects are stabilizing for the internal kink mode. However, the elongation of ITER reduces the stabilization effects significantly. Nonlinear simulations of the precessional drift fishbone instability for circular tokamak plasmas show that the mode saturates due to flattening of the particle distribution function near the resonance region. The mode frequency chirps down rapidly as the flattening region expands radially outward. Fluid nonlinearity reduces the saturation level.