Magnetically anisotropic self similarity in plasma turbulence

Details Magnetically anisotropic self similarity in plasma turbulence Magnetically anisotropic self similarity in plasma turbulence

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh41c..08h&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH41C-08

Physics

Plasma Physics

[2149] Interplanetary Physics / Mhd Waves And Turbulence, [7863] Space Plasma Physics / Turbulence

Scientific paper

We present measurements of the anisotropic scaling properties of inertial range magnetohydrodynamic plasma turbulence in the solar wind and show that high order moments of the fluctuations scale more steeply parallel to the magnetic field than perpendicular to it, in common with the power spectrum. We calculate structure function moments up to 4th order and find intermittency present in all directions. We demonstrate, however, that the scaling can be decomposed into independent dependencies on the moment and angle to the magnetic field. This suggests that the intermittent properties of the fluctuations are independent of the field-aligned anisotropy and supports the interpretation of a critically balanced cascade. Conveniently, this self similarity property makes it possible to consider separately the intermittent and anisotropic properties of magnetohydrodynamic turbulence.

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