Other
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1335o&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 13, July 6, 1992, p. 1335-1338. Research supported by University of
Other
12
Anisotropic Fluids, Discontinuity, Rotating Plasmas, Shock Waves, Space Plasmas, Magnetohydrodynamics, Magnetopause, Magnetosheath, Solar Wind
Scientific paper
The kinetic structure of rotational discontinuities (RDs) in anisotropic plasmas with T-perpendicular/T-parallel is greater than 1 is investigated by using a 1D electromagnetic hybrid code. To form the RD, a new approach is used where the plasma is injected from one boundary and reflected from the other, resulting in the generation of a traveling fast shock and an RD. The results show that across the RD both the magnetic field strength and direction, as well as the plasma density change. Given that such a change can also be associated with an intermediate shock, the Rankine-Hugoniot relations are used to confirm that the observed structures are indeed RDs. It is found that the thickness of RDs is a few ion inertial lengths and is independent of the rotation angle. Also, the preferred sense of rotation is in the electron sense; however, RDs with a rotation angle larger than 180 deg are found to be unstable, changing their rotation to a stable ion sense.
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