Turbulence and Plasma Heating in the Solar Wind

Details Turbulence and Plasma Heating in the Solar Wind Turbulence and Plasma Heating in the Solar Wind

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh33b..07h&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH33B-07

Physics

2149 Mhd Waves And Turbulence (2752, 6050, 7836), 2159 Plasma Waves And Turbulence, 2164 Solar Wind Plasma

Scientific paper

Measurements of the solar wind plasma in the inner heliosphere show non-adiabatic temperature profiles for the plasma species, suggesting in situ heating of the solar wind. Heating of the plasma via the dissipation of a turbulent cascade is considered a promising explanation; phase space instabilities may also play an important role in constraining the temperature anisotropies of each species as the solar wind expands radially. I will present the results of nonlinear, kinetic simulations of the plasma turbulence aimed at determining directly the heating of each species. In addition, an analytical model of the plasma heating in the inner heliosphere is used to identify the influence of temperature anisotropy instabilities and to constrain the required heating by the plasma turbulence. This work is supported by the DOE Center for Multi-scale Plasma Dynamics, Fusion Science Center Cooperative Agreement ER54785.

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