Rayleigh-Taylor/gravitational instability in dense magnetoplasmas

Details Rayleigh-Taylor/gravitational instability in dense magnetoplasmas Rayleigh-Taylor/gravitational instability in dense magnetoplasmas

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phla..373.2940a&link_type=abstract

Physics Letters A, Volume 373, Issue 33, p. 2940-2943.

Physics

2

Scientific paper

The Rayleigh-Taylor instability is investigated in a nonuniform dense quantum magnetoplasma. For this purpose, a quantum hydrodynamical model is used for the electrons whereas the ions are assumed to be cold and classical. The dispersion relation for the Rayleigh-Taylor instability becomes modified with the quantum corrections associated with the Fermi pressure law and the quantum Bohm potential force. Numerically, it is found that the quantum speed and density gradient significantly modify the growth rate of RT instability. In a dense quantum magnetoplasma case, the linear growth rate of RT instability becomes significantly higher than its classical value and the modes are found to be highly localized. The present investigation should be useful in the studies of dense astrophysical magnetoplasmas as well as in laser-produced plasmas.

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