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Hydrodynamics of supercritical region in laser ablated plasmas

Published online by Cambridge University Press:  09 March 2009

M. Vaselli ,
V. Palleschi  and
D. P. Singh
M. Vaselli
Affiliation:
Istituto di Fisica Atomica e Molecolare del C.N.R.-Via del Giardino 7, 56127 Pisa, Italy
V. Palleschi
Affiliation:
Istituto di Fisica Atomica e Molecolare del C.N.R.-Via del Giardino 7, 56127 Pisa, Italy
D. P. Singh
Affiliation:
Istituto di Fisica Atomica e Molecolare del C.N.R.-Via del Giardino 7, 56127 Pisa, Italy
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Abstract

The laser ablated plasma flow and subsequent plasma density profile in steep plasma temperature gradient in spherical geometry are studied. Using local flux-limited model of heat flow the effect of flux-inhibition on the hydrodynamics of plasma ablation zone is investigated. The radial variation of thermal flux through local flux-limited model with recently accepted numerical range of flux-limit ≈ 10% of the free streaming is in close agreement with Spitzer's classical thermal conduction reduced by about an order of magnitude which may be attributed to the presence of megagauss level self-generated magnetic fields as predicted earlier to interpret experimental observations on X-rays emission spectra.

Type
Research Article
Information
Laser and Particle Beams , Volume 7 , Issue 3 , August 1989 , pp. 589 - 595
Copyright
Copyright © Cambridge University Press 1989

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