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Laser-produced blast wave and numerical simulation using the FLASH code

Published online by Cambridge University Press:  05 December 2005

D.R. FARLEY ,
K. SHIGEMORI  and
H. AZECHI
D.R. FARLEY
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka Japan EPRI Worldwide, Palo Alto, California
K. SHIGEMORI
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka Japan
H. AZECHI
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka Japan
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Abstract

Two-dimensional (2D) FLASH simulations were run with Spitzer-Härm conductivity on and off in an attempt to simulate a laser-produced blast wave. Dissociation, ionization, recombination, and radiative cooling were not included. An initial Gaussian temperature profile with T0 = 120 eV and spot radius r0 = 25 μm was used assuming 1 μm thickness of the CH disk is ablated into the background nitrogen gas. Evolution of the blast wave differs slightly between the cases of Spitzer-Härm on and off, and neither case matches well with experiment. Due to the high temperatures involved, a thermal wave should be expected such that the Spitzer-Härm conductivity on case is more likely. A simulation run with an initial temperature of ∼ 4 keV might match better with experiment.

Keywords

Blast waveLaserPlasmaSimulation
Type
Research Article
Information
Laser and Particle Beams , Volume 23 , Issue 4 , October 2005 , pp. 513 - 519
Copyright
© 2005 Cambridge University Press

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