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Effects of viscosity in modeling laser fusion implosions

Published online by Cambridge University Press:  17 December 2007

W. Manheimer  and
D. Colombant
W. Manheimer
Affiliation:
RSI Corporation, Lanham, Maryland and Plasma Physics Division, Naval Research Laboratory, Washington, DC
D. Colombant*
Affiliation:
Plasma Physics Division, Naval Research Laboratory, Washington, DC
*
Address correspondence and reprint requests to: Denis Colombant, Code 6730, Plasma Physics Division, Naval Research Laboratory, Washington DC, 20375. E-mail: [email protected]
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Abstract

This paper examines the necessity of including ion viscosity in modeling laser fusion implosions. Using the Naval Research Laboratory one-half Mega Joule laser fusion target as an example, it is shown that for virtually the entire implosion up to maximum compression, and the entire rebound after the implosion, ion viscosity is unimportant. However for about half a nanosecond before peak implosion, ion viscosity can have a significant, but by no means dominant effect on both the one-dimensional flow and on the Rayleigh-Taylor instability.

Keywords

Ion viscosity effectsLaser implosion modelingRayleigh-Taylor instability
Type
Research Article
Information
Laser and Particle Beams , Volume 25 , Issue 4 , December 2007 , pp. 541 - 547
Copyright
Copyright © Cambridge University Press 2007

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