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Phys. Rev. Lett. 74, 1594–1596 (1995)

[Issue 9 – 27 February 1995 ]

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Nonlinear Hybrid Simulation of the Toroidicity-Induced Alfvén Eigenmode

G. Y. Fu and W. Park

Princeton Plasma Physics Laboratory, Princeton University, P.O. Box 451, Princeton, New Jersey 08543

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/abstract/PRL/v74/p1594
DOI: 10.11.03/PhysRevLett.74.1594
PACS: 52.35.Bj, 52.55.Pi, 52.65.Kj, 52.65.Tt

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References

1. R. J. Hawryluk et al., Phys. Rev. Lett. 72, 3530 (1994).
2. K. Takahashi, Adv. Space Res. 8, 427 (1988); L. Chen and A. Hasegawa, J. Geophys. Res. 96, 1503 (1991).
3. W. Park et al., Phys. Fluids B 4, 2033 (1992).
4. W. W. Lee, J. Comput. Phys. 72, 243 (1987).
5. C. Z. Cheng, Phys. Rep. 211, 1 (1992).
6. G. Y. Fu, C. Z. Cheng, and K. L. Wong, Phys. Fluids B 5, 4040 (1993).
7. K. L. Wong et al., Phys. Fluids B 4, 2122 (1992).
8. G. Y. Fu and W. Park, in Abstracts of the 1994 International Sherwood Fusion Theory Conference, Dallas, TX (Institute for Fusion Studies, Austin, TX,1994).
9. W. W. Heidbrink et al., Phys. Fluids B 5, 2176 (1993).
10. H. L. Berk, B. N. Breizman, and H. Ye, Phys. Rev. Lett. 68, 3563 (1992).
11. Y. Yu and R. White, Phys. Plasmas 1, 2733 (1994).

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