Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ap%26ss.307...47s&link_type=abstract
Astrophysics and Space Science, Volume 307, Issue 1-3, pp. 47-50
Astronomy and Astrophysics
Astrophysics
3
Laser Experiments, Plasma Jet, Episodic Outflow
Scientific paper
A double-pulse laser drive is used to create episodic supersonic plasma jets that propagate into a low density ambient medium. These are among the first laser experiments to generate pulsed outflow. The temporal laser-intensity profile consists of two 1-ns square pulses separated by 9.6 ns. The laser is focused on a truncated conical plug made of medium Z material inserted into a high-Z washer. Unloading material from the plug is collimated within the cylindrical washer hole, then propagates into the low-Z foam medium. The resulting jet is denser than the ambient medium. Double-pulse jet evolution is compared to that driven by a single laser pulse. The total drive energy is the same for both jets, as if a source with fixed energy generated a jet from either one or two bursts. Radiographs taken at 100 ns show that a single-pulse jet was broader than the double-pulse jet, as predicted by hydrodynamic simulations. Since the initial shock creating the jet is stronger when all the energy arrives in a single pulse, the jet material impacts the ambient medium with higher initial velocity. Detailed comparisons between single- and double-pulsed jet rheology and shock structure are presented. 2-D hydrodynamic simulations are compared to the experimental radiographs.
Frank Alejandro
Igumenshchev Igor V.
Knauer J. P.
Meyerhofer Dietrich
Sublett S.
No associations
LandOfFree
Double-Pulse Laser-Driven Jets on OMEGA does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Double-Pulse Laser-Driven Jets on OMEGA, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double-Pulse Laser-Driven Jets on OMEGA will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1363714