American Nuclear Society
Home

Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 59 / Number 3 / Pages 549-560

Nonlinear Consequences of Energetic Particle Instabilities

Boris Breizman

Fusion Science and Technology / Volume 59 / Number 3 / Pages 549-560

April 2011

Format:

Price:$30.00
Member Price:$27.00
Member Savings:$3.00

The buildup of the energetic particle population in fusion plasmas is typically slow compared to the growth times of energetic-particle driven instabilities. This feature draws special attention to nonlinear studies of unstable waves in the near-threshold regimes. The goal is to characterize the long-time behavior of the weakly dissipative waves and resonant particles in the presence of particle sources and sinks. There are numerous experimental observations of energetic-particle driven instabilities. In some cases the unstable modes grow to a level at which they cause enhanced transport and anomalous losses of the fast particles. In other cases the losses are small but the modes exhibit an intricate nonlinear behavior: generation of sidebands, quasi-periodic bursts, change of the mode frequency in time, etc. This lecture, presented at the 4th ITER International Summer School in Austin, Texas, provides a first-principles physics basis for understanding these phenomena.

 
 
 
Questions or comments about the site? Contact the ANS Webmaster.
advertisement