Journal
PHYSICAL REVIEW E
Volume 67, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.67.056409
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Soft-x-ray laser interferograms of laser-created plasmas generated at moderate irradiation intensities (1x10(11)-7x10(12) W cm(-2)) with lambda=1.06 mum light pulses of similar to13-ns-FWHM (full width at half maximum) duration and narrow focus (similar to30 mum) reveal the unexpected formation of an inverted density profile with a density minimum on axis and distinct plasma sidelobes. Model simulations show that this strong two-dimensional hydrodynamic behavior is essentially a universal phenomena that is the result of plasma radiation induced mass ablation and cooling in the areas surrounding the focal spot.
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