Investigation of Ultrafast Laser-Driven Radiative Blast Waves

Details Investigation of Ultrafast Laser-Driven Radiative Blast Waves Investigation of Ultrafast Laser-Driven Radiative Blast Waves

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001phrvl..87h5004e&link_type=abstract

Physical Review Letters, vol. 87, Issue 8, id. 085004

Physics

47

Scientific paper

We have examined the evolution of cylindrically symmetric blast waves produced by the deposition of femtosecond laser pulses in gas jets. In high- Z gases radiative effects become important. We observe the production of an ionization precursor ahead of the shock front and deceleration parameters below the adiabatic value of 1/2 (for a cylinder), an effect expected when the blast wave loses energy by radiative cooling. Despite significant radiative cooling, the blast waves do not appear to develop thin shell instabilities expected for strongly radiative waves. This is believed to be due to the stabilizing effect of a relatively thick blast wave shell resulting in part from electron thermal conduction effects.

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