Physics – Plasma Physics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.104..169h&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 104, no. 1, Sept. 1984, p. 169-179.
Physics
Plasma Physics
Collisionless Plasmas, Energy Conversion, Energy Transfer, Geomagnetic Tail, Magnetic Field Configurations, Conservation Laws, Plasma Heating, Plasma Physics
Scientific paper
A "two-fluid" plasma is described as a single continuum characterised by the generalised tensor of mechanical pressure and generalised vector of flow of mechanical energy. Plasma energization due to the transfer of mechanical energy inside the plasma body is emphasised and the energization of plasma by conversion of the electromagnetic energy into the mechanical energy is discussed. Two kinds of conversion associated with the convection electric field -(1/c)V×B and with the deviation E* of the total electric field from -(1/c)V×B are distinguished. The V×B-field is related to the work done upon the plasma, while the E*-field is related to the plasma heating. Plasma motions with scale length larger than the Debye distance, taking place in the central part of the Earth-plasma sheet, are considered.
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