Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh42b..02c&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH42B-02
Physics
Plasma Physics
[2134] Interplanetary Physics / Interplanetary Magnetic Fields, [2149] Interplanetary Physics / Mhd Waves And Turbulence, [2164] Interplanetary Physics / Solar Wind Plasma, [7863] Space Plasma Physics / Turbulence
Scientific paper
Solar wind turbulence has been measured for many decades but its three-dimensional structure has been poorly characterized, partly due to a limited number of spacecraft. If we are to understand its basic dynamics, however, it is important to know what this structure is. Here, we present a new single-spacecraft technique to measure the 3D properties of solar wind turbulence in the inertial range. As well as the local magnetic field direction, we have identified another special direction, which induces 3D anisotropy. The scale dependent 3D anisotropy of the Alfvenic turbulence has been measured and compared to theoretical predictions. In addition, the 3D anisotropy of the compressive fluctuations has been measured and is significantly different to that of the Alfvenic turbulence, in agreement with other recent predictions. The implications of these measurements for our understanding of plasma turbulence are discussed.
Bale Stuart
Chen Christine H.
Horbury Tim S.
Mallet Alain
Schekochihin Alexander A.
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