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Publication
Rayleigh-Taylor instability in an adiabatic-radiative rare plasma
Journal Contribution - Journal Article
Considering the particle nature of photons, the impact of electromagnetic radiation pressure is
examined on the Rayleigh-Taylor instability (RTI) in a non-uniform rare magnetoplasma. For lowdensity
and high-temperature rare plasma, the RTI with radiation pressure is revisited in the adiabatic
limit. The growth rate conditions and propagating modes are derived using the framework of a
developed fluid model. For specific values of ion temperature, the cut-off values of propagation of the
fringing instability is found to be temperature dependent. Anumerical comparison of the present
results with previous work Maryam N, RozinaCand Ali S (2021, IEEE Transactions on Plasma Science
49 1072–1078) is displayed in table 1. It is found that the radiative acoustic speed is increased due to
electromagnetic radiation pressure in rare plasmas as compared to radiative acoustic speed in dense
plasmas. However, the growth rate of RTI increases comparatively as function of radiation pressure in
rare plasmas. The present findings reveals that the consequences of RTI are remarkably concerned
with the choice of electromagnetic radiation pressure either in dense (astrophysical) or rare
(laboratory) plasmas. These findings are relevant to the observations of long-lived irregularities for
explaining the gravitational instability in laboratory plasmas, e.g. in fusion devices like tokamaks.
Journal: Physica Scripta
ISSN: 0031-8949
Issue: 4
Volume: 98
Publication year:2023
Accessibility:Closed