J. Phys. IV France
Volume 133, June 2006
Page(s) 213 - 217
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 213-217

DOI: 10.1051/jp4:2006133043

Advanced green house target design

V. Rozanov1, S. Guskov1, R. Stepanov1, I. Doskoch1 and N. Zmitrenko2

1  P.N. Lebedev Physical Institute of the RAS, Moscow, Russia
2  Institute of Mathematical Modeling of the RAS, Moscow, Russia

Different designs of a green house target (GHT) were considered at 2 MJ laser pulse energy, in which the thermonuclear gain G achieved ~20-30 in one-dimensional calculations. The GH targets were designed to attain a symmetrical compression and efficient thermonuclear burning of a target irradiated by a low number of laser beams (N=2, 4, 6, 8 ... ) by using a low-density foam-like absorber. But as compared to the earlier studied target designs, where the value of gain G achieved $\sim $8, the newly developed schemes are more risky, less reliable, and less experimentally verified. In the calculations, value G is increased as one employs a longer laser pulse for compression, the greater A=R0/ ${\rm\Delta} R_{0}$, the conversion ratio R0/ $R_{\rm min}$, and the lesser value $\alpha=p/p_{F}$. It seems that all these changes correspond to a less stable regime of operation. A sensitivity of results to the elements of uncertainty in the physics of processes is discussed.

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