Laboratory observation of secondary shock formation ahead of a strongly radiative blast wave

ASTROPHYS SPACE SCI 307:1-3 (2007) 219-225

Authors:

JF Hansen, MJ Edwards, DH Froula, AD Edens, G Gregori, T Ditmire

Abstract:

We have previously reported the experimental discovery of a second shock forming ahead of a radiative shock propagating in Xe. The initial shock is spherical, radiative, with a high Mach number, and it sends a supersonic radiative heat wave far ahead of itself. The heat wave rapidly slows to a transonic regime and when its Mach number drops to two with respect to the downstream plasma, the heat wave drives a second shock ahead of itself to satisfy mass and momentum conservation in the heat wave reference frame. We now show experimental data from a range of mixtures of Xe and N-2, gradually changing the properties of the initial shock and the environment into which the shock moves and radiates (the radiative conductivity and the heat capacity). We have successfully observed second shock formation over the entire range from 100% Xe mass fraction to 100% N-2. The formation radius of the second shock as a function of Xe mass fraction is consistent with an analytical estimate.

Modeling Planetary Interiors in Laser Based Experiments Using Shockless Compression

Astrophysics and Space Science Springer Nature 307:1-3 (2007) 285-289

Authors:

J Hawreliak, J Colvin, J Eggert, DH Kalantar, HE Lorenzana, S Pollaine, K Rosolankova, BA Remington, J Stölken, JS Wark

GeV electron beams from a centimeter-scale laser-driven plasma accelerator

2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 (2007) 4367-+

Authors:

AJ Gonsalves, K Nakamura, Cs Toth, CGR Geddes, CB Schroeder, E Esarey, E Cormier-Michel, WP Leemans, D Brahwiler, JR Cary, SM Hooker

Large acoustic transients induced by nonthermal melting of InSb

PHYSICAL REVIEW LETTERS 98:22 (2007) ARTN 225502

Authors:

H Enquist, H Navirian, TN Hansen, AM Lindenberg, P Sondhauss, O Synnergren, JS Wark, J Larsson

Modeling Planetary Interiors in Laser Based Experiments Using Shockless Compression

Chapter in High Energy Density Laboratory Astrophysics, Springer Nature (2007) 285-289

Authors:

J Hawreliak, J Colvin, J Eggert, DH Kalantar, HE Lorenzana, S Pollaine, K Rosolankova, BA Remington, J Stölken, JS Wark