Abstract
Radiation absorption, energy transport, and plasma production due to the interaction of a laser beam with a homogeneous medium of light elements is considered on the basis of 2D numerical calculations. We assume that the density of this medium is lower than the critical density of plasma corresponding to the plasma resonance for the wavelength of the laser radiation. Calculations are performed within the framework of the HEAT-3D program which includes the equation for 2D thermal conductivity with the source of energy provided by the inverse bremsstrahlung absorption of the laser beam in the medium.
Modeling of the interaction of laser beams of intensity 1014–5·1015 W/cm2, wavelengths λ=1.053 μm and 0.527 μm, and radii 10−2–6·10−2 cm with media of light elements of density 10−3–10−2 g/cm3 is realized. An analysis of the calculation results showed that the space temperature distribution in the plasma is determined by the energy-transport anisotropy. The degree of anisotropy depends, in turn, on the ratio of the beam radius to the length of laser-radiation absorption, which is a function of density and temperature of the plasma produced. The calculation results are compared with experimental data on the laser-beam interaction with low-density targets.
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S. Yu. Gus'kov, V. B. Rosanov, and N. V. Zmitrenko, “ICF target with distributed absorption of laser energy,” in: S. J. Rose (ed.),Laser Interaction with Matter, Proceedings of the 23rd European Conferens on Laser Interaction with Matter (Oxford, UK, 1994), IOP Publishing, Bristol, Ser. No. 140 (1995), p. 275.
S. Yu. Gus'kov, V. B. Rosanov, and N. V. Zmitrenko,Zh. Éksp. Teor. Fiz.,108, 548 (1995).
S. Yu. Gus'kov and V. B. Rosanov,Kvantovaya Élektron.,24, 715 (1997).
I. V. Popov, N. V. Zmitrenko, V. F. Tishkin, et al., “Numerical simulations of 3D waves of electron heat conductivity at laser-beam absorption in plasma,” in: G. Velarde, J. M. Martinez-Val, E. Minguez and J. M. Perlado (Eds.),Advances in Laser Interaction with Matter and Inertial Fusion, Proceedings of the 24th European Conference on Laser Interaction with Matter (Madrid, 1996) World Scientific, Singapore (1997), p. 172.
J. A. Koch, K. J. Estabrook, J. D. Bauer, et al.,Phys. Plasm.,2, 3820 (1995).
A. E. Bugrov, S. Yu. Gus'kov, V. B. Rosanov, et al.,Zh. Éksp. Teor. Fiz.,111, 903 (1997).
A. E. Bugrov, I. N. Burdonsky, V. V. Gavrilov, et al.,Zh. Éksp. Teor. Fiz.,115, 805 (1999).
A. Caruso, S. Yu. Gus'kov, N. N. Demchenko, et al.,J. Russ. Laser Res.,18, 464 (1997).
P. L. Andreoli, A. Caruso, G. Cristofary, et al., “Powerful laser pulse interaction with supercritical density foams,” Preprint No. 35 of the P. N. Lebedev Physical Institute, Moscow (1998).
D. Batani, A. Benuzzi, M. Koenig, et al.,Plasma Phys. Contr. Fusion,40, 1576 (1998).
S. Yu. Gus'kov and V. B. Rosanov, “Physics of the laser green house target: review of experimental and theoretical results,” in: G. Velarde, J. M. Martinez-Val, E. Minguez, and J. M. Perlado (Eds.),Advances in Laser Interaction with Matter and Inertial Fusion, Proceedings of the 24th European Conference on Laser Interaction with Matter (Madrid, 1996), World Scientific, Singapore (1997), p. 142
S. Yu. Gus'kov, “Theory of laser-simulated homogenization of regularly volume-structured media and foams”, Preprint No. 49 of the P. N. Lebedev Physical Institute, Moscow (1998).
A. A. Samarsky, S. A. Gaifulin, A. V. Zakharov, et al., in: E. P. Velikhov (Ed.)Fundamentals of Atomic Science and Technology. Problems of Nuclear Physics and Engeneering [in Russian], Energoatomizdat, Moscow (1983), Vol. 2, p. 38.
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Translated from a manuscript submitted October 23, 1999.
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Gus'kov, S.Y., Popov, I.V., Rozanov, V.B. et al. Numerical modeling of a 2D wave of electron thermal conductivity produced by a laser beam in targets of subcritical density. J Russ Laser Res 21, 157–167 (2000). https://doi.org/10.1007/BF02508567
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DOI: https://doi.org/10.1007/BF02508567