Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apjs..127..445p&link_type=abstract
The Astrophysical Journal Supplement Series, Volume 127, Issue 2, pp. 445-449.
Astronomy and Astrophysics
Astronomy
6
Plasmas, Relativity, Scattering
Scientific paper
By means of the numerical study of the dynamics of a plasma irradiated by an ultraintense laser beam, we analyze two major effects induced by the relativistic dynamics of the target's particles. First, we show how the magnetic term in the Lorentz force leads to inhomogeneities in the plasma surface-charge density. We demonstrate that the induced inhomogeneities are regular when the impinging field intensity has a uniform transversal profile. This regularity gives rise to a grating-like structure, which may be detected by observation of the field reflected by the plasma target. The second effect studied is linked with the anisotropic character of the Liénard-Wiechert fields associated with the plasma particles. This velocity-dependent anisotropy enhances plasma oscillations as the plasma particles quiver in response to the incident electromagnetic wave. The result of this plasmon enhancement may be observed by inspection of the harmonic intensities of the light transmitted by a thin plasma slab irradiated by a high-intensity laser beam.
Conejero Jarque Enrique
Plaja Luis
Roso Luis
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