Physics – Plasma Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..dppbp1090s&link_type=abstract
American Physical Society, 43rd Annual Meeting of the APS Division of Plasma Physics October 29 - November 2, 2001 Long Beach, C
Physics
Plasma Physics
Scientific paper
We are studying inhomogenieties in SiO2 aerogel. The aerogel has been treated in our hydrodynamic simulations as a material with uniform density but is modeled to grow by diffusion-limited cluster-cluster aggregation (DLCA) during the sol-gel process. We have modified DLCA FORTRAN code to grow a SiO2 aerogel model to be used as input in established hydrodynamic code in order to calculate the propagation of a converging conical shock wave through the foam. The foam has an average density of 100 mg/cm^3 and consists of roughly spherical globules of SiO2 molecules with an average radius of 100 nm±5 nm. This foam is being tested for plasma jet experiments relevant to astrophysics in which a conical shock wave propagating through the foam is driven by one to six OMEGA laser beams. Fluid downstream of the shock wave is forced through an aperture to create a plasma jet imaged by self-emission and silicon x-ray absorption. This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC03-92SF19460.
Frank Alejandro
Knauer J. P.
Meyerhofer Dietrich
Poludnenko Alexei Y.
Skupsky S.
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