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APS » Journals » Phys. Rev. Lett. » Volume 99 » Issue 26
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Phys. Rev. Lett. 99, 265003 (2007) [4 pages]

Wave-Particle Decorrelation and Transport of Anisotropic Turbulence in Collisionless Plasmas

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Z. Lin*, I. Holod, and L. Chen
Department of Physics and Astronomy, University of California, Irvine, California 92697, USA

P. H. Diamond
Department of Physics, University of California, San Diego, California 92093, USA

T. S. Hahm and S. Ethier
Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, USA

Received 2 August 2007; published 27 December 2007

Comprehensive analysis of the largest first-principles simulations to date shows that stochastic wave-particle decorrelation is the dominant mechanism responsible for electron heat transport driven by electron temperature gradient turbulence with extended radial streamers. The transport is proportional to the local fluctuation intensity, and phase-space island overlap leads to a diffusive process with a time scale comparable to the wave-particle decorrelation time, determined by the fluctuation spectral width. This kinetic time scale is much shorter than the fluid time scale of eddy mixing.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.265003
DOI:
10.1103/PhysRevLett.99.265003
PACS:
52.35.Ra, 52.25.Fi, 52.35.Kt, 52.65.−y

*zhihongl@uci.edu

 
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