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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
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
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.
IAEA 2001
