The Shiva laser-fusion facility

Second Harmonic Generation under Strong Influence of Dispersion and Cubic Nonlinearity Effects

“…At a large angle of view d/D (no selffiltering) all noise waves reach the nonlinear element and noise power at its output is the highest. In this case filamentation appears at B≈2.5 (F≈1), the fact was observed in our experiments in accordance with other papers (Bespalov and Talanov 1966;Bunkenberg, Boles et al 1981;Speck 1981;Vlasov, Kryzhanovskiĭ et al 1982 …”

Evolution of surface structure in laser-preheated perturbed materials

“…This scheme, employing two concentric spherical shells, adds considerable complexity to the capsule design, but inclusion of the second capsule may mitigate difficulties arising from issues such as drive asymmetry and convergence. Experiments exploring double-shell implosions using the indirect-drive approach have been carried out on virtually every generation of major pulsed laser system, starting with Shiva [21,22] and continuing through OMEGA-60 [16,23], and planned work at the NIF [24] is currently under development [20,25]. Double-shell capsules are also a possible option for the direct-drive approach [26][27][28], although preheat in this case behaves differently than with hohlraum indirect drive.…”

Theoretical investigation of negative influence of the cubic nonlinearity and induced birefringence on developing and using contemporary PW lasers systems

“…In the course of powerful radiation propagation in such a medium the phase front is distorted and, at γ NL >0, the beam is self-focused as a whole [12]. For B>2÷3, small-scale self-focusing occurs, resulting in beam filamentation and destruction of optical elements [13][14][15][16]. At small-scale focusing the authors of [17] observed radiation depolarization caused by depolarized noise.…”