Energetic Charged Particle Transport and Energization in Dynamic Two-dimensional Turbulence

Details Energetic Charged Particle Transport and Energization in Dynamic Two-dimensional Turbulence Energetic Charged Particle Transport and Energization in Dynamic Two-dimensional Turbulence

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...602..396l&link_type=abstract

The Astrophysical Journal, Volume 602, Issue 1, pp. 396-414.

Astronomy and Astrophysics

Astronomy

8

Acceleration Of Particles, Magnetohydrodynamics: Mhd, Scattering, Sun: Solar Wind, Turbulence

Scientific paper

Quasi-linear theory has been used extensively to study the interaction of energetic particles with MHD fluctuations in the solar wind. However, in recent years there has developed a view that solar wind MHD turbulence can be modeled approximately as a dominating incompressible two-dimensional turbulence component combined with a minor one-dimensional parallel-propagating Alfvén wave component (a one-dimensional slab component in the static limit). Here a quasi-linear theory is developed to investigate the effect of dynamical two-dimensional MHD turbulence in the solar wind on low-energy charged particle pitch-angle scattering and momentum diffusion. Stochastic acceleration by transverse two-dimensional turbulence electric field fluctuations is also considered, yielding finite momentum diffusion coefficients. We find significant effects by energy-containing-scale, dynamic two-dimensional turbulence on low-energy particles in the vicinity of 1 keV energies, and overall dominance of parallel-propagating Alfvén waves at higher energies.

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