Plasma energy balance model for optical-laser-induced impulse in vacuo [electronic resource].
- Los Alamos, N.M. : Los Alamos National Laboratory, 1986.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 13 : digital, PDF file
- Additional Creators:
- Los Alamos National Laboratory
United States. Department of Energy. Office of Scientific and Technical Information
- A simple plasma-energy-balance model, along with its derivation, is presented for calculating the impulse from targets in a vacuum exposed to single-pulse, optical lasers. Figures demonstrate that throughout most of the range of interest, results from the model agree well with experimental data and LASNEX radiation-hydrodynamic computer code calculations. The model assumes isothermal blowoff and thus takes advantage of the insensitivity of impulse to energy distribution within the ablated mass. The density profile in the blowoff plasma is estimated and the Saha equation is used to evaluate the degree of ionization. The laser absorption coefficient and thermal radiation opacity are evaluated as a function of position in the plasma in order to evaluate the energy reaching the ablation surface. An overall energy balance plus an energy balance at the ablation surface are used to determine the blowoff mass and temperature. The success of the model indicates that the impulse is insensitive to detailed interactions in the vicinity of the ablation surface. 10 refs., 3 figs.
- Published through SciTech Connect.
9. international conference on lasers and applications, Orlando, FL, USA, 3 Nov 1986.
Goldman, S.R.; Dingus, R.S.
- Funding Information:
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