Phys. Rev. Lett. 74, 1594–1596 (1995)Nonlinear Hybrid Simulation of the Toroidicity-Induced Alfvén EigenmodeReceived 10 August 1994; published in the issue dated 27 February 1995 Gyrokinetic-magnetohydrodynamic hybrid simulations have been carried out to study the nonlinear saturation of the torodicity-induced Alfvén eigenmode driven by energetic particles in a tokamak plasma. It is shown that wave-particle trapping is the nonlinear saturation mechanism for the parameters considered. The corresponding density profile flattening of the hot particles is observed. The saturation amplitude is proportional to the square of the linear growth rate. In addition, a new n = 1,m = 0 global Alfvén eigenmode is shown to be excited by the energetic particles. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.1594
DOI:
10.1103/PhysRevLett.74.1594
PACS:
52.35.Bj, 52.55.Pi, 52.65.Kj, 52.65.Tt
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