Physics
Scientific paper
Mar 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...103.4775l&link_type=abstract
Journal of Geophysical Research, vol. 103, p. 4775
Physics
262
Interplanetary Magnetic Fields, Ion Temperature, Cyclotron Resonance, Magnetohydrodynamic Turbulence, Oblique Shock Waves, Wave Propagation
Scientific paper
The dissipation range for interplanetary magnetic field fluctuations is formed by those fluctuations with spatial scales comparable to the gyroradius or ion inertial length of a thermal ion. We examine Wind observations of inertial and dissipation range spectra in an attempt to better understand the processes that form the dissipation range and how these processes depend on the ambient solar wind parameters. We focus on stationary intervals with well-defined inertial and dissipation range spectra. Our analysis shows that parallel-propagating waves, such as Alfven waves, are inconsistent with the data. MHD turbulence consisting of a partly slab and partly 2D composite geometry is consistent with the observations, while thermal particle interactions with the 2D component may be responsible for the formation of the dissipation range.
Leamon Robert J.
Matthaeus William H.
Ness Norman F.
Smith Charles W.
Wong Hung K.
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