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(TH2/4) Collective Phenomena with Energetic Particles in Fusion Plasmas

   
B. N. Breizman , H. L. Berk , J. Candy , M. S. Pekker , N. V. Petviashvili , J. W. van Dam , H. V. Wong 
Institute for Fusion Studies, The University of Texas at Austin, Austin, TX 78712, USA Z.Y.
 
CHANG, E. Fredrickson , G. Y. Fu , K.-L. Wong 
Plasma Physics Laboratory, Princeton University, Princeton, NJ 08543, USA
 
A. Fasoli 
Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
 
D. Borba , R. F. Heeter , S. Sharapov 
JET Joint Undertaking, Abingdon OX14 3EA, United Kingdom
 
F. Porcelli 
Departamento di Energetica, Politechnico di Torino, Torino 10129, Italy
 
V. P. Pastukhov 
Russian Research Center ``Kurchatov Institute'', Moscow 123182, Russia

Abstract
Recent progress in the theory of collective modes  driven by energetic particles , as well as interpretations of fast particle effects observed in fusion-related experiments, are described. New developments in linear theory include: (a) Alfvén-mode frequency gap widening due to energetic trapped ions, (b) interpretation of JET  results for plasma pressure effect on TAE modes, and (c) ``counter'' propagation of TAE modes due to trapped fast ion anisotropy. The new nonlinear results are: (a) theoretical explanation for the pitchfork splitting effect  observed in TAE experiments on JET, (b) existence of coherent structures with strong frequency chirping due to kinetic instability, (c) self-consistent nonlinear theory for fishbone instabilities, and (d) intermittent quasilinear diffusion model for anomalous fast particle losses.

     

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