Convective transport of fast particles in dissipative plasmas near an instability threshold

Details Convective transport of fast particles in dissipative plasmas near an instability threshold Convective transport of fast particles in dissipative plasmas near an instability threshold

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..apr.s1002b&link_type=abstract

American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #S1.002

Physics

Scientific paper

We demonstrate that a marginally unstable energetic particle population in a dissipative plasma can change globally due to the act of a single wave-particle resonance. The resonance serves as a seed for the continuous production of nonlinear holes and clumps, whose convective motion in phase space results in substantial flattening of the fast particle distribution function. A bump-on-tail instability is considered as an example in a single-mode limit as well as in the quasilinear regime. The convective hole-clump transport mechanism tends to be more efficient near the instability threshold than quasilinear diffusion.

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