Filevich J, Rocca J J, Jankowska E, Hammarsten E C, Kanizay K, Marconi M C, Moon S J, Shlyaptsev V N
Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523, USA.
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 May;67(5 Pt 2):056409. doi: 10.1103/PhysRevE.67.056409. Epub 2003 May 29.
Soft-x-ray laser interferograms of laser-created plasmas generated at moderate irradiation intensities (1 x 10(11)-7 x 10(12) W cm(-2)) with lambda=1.06 microm light pulses of approximately 13-ns-FWHM (full width at half maximum) duration and narrow focus (approximately 30 microm) 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.
