Electronic Resource
New York, NY
:
American Institute of Physics (AIP)
Physics of Fluids
5 (1993), S. 2736-2738
ISSN:
1089-7666
Source:
AIP Digital Archive
Topics:
Physics
Notes:
It is demonstrated both analytically and numerically that mode couplings play an important role in the nonlinear evolution of alpha-particle-driven long wavelength Alfvén wave instabilities. The mode coupling process is characterized by a beat between two linearly unstable Alfvén waves having opposite frequencies, which generates a linearly stable, static (zero frequency) mode. The backreaction of the static mode tends to stabilize the Alfvén instabilities by eliminating the phase shift between the alpha pressure and the Alfvén fluctuations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.860713
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