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VOLUME 24 (1976) | ISSUE 10 | PAGE 551
Features of the structure of the harmonics 2ω0 and 3ω0/2 generated in a laser plasma
Results are presented of experimental investigations of the spectral structure, the angular dependences, and the temporal characteristics of the emission of the harmonics 2ω0 and 3coo/2 generated in a plasma produced when flat targets are irradiated by a powerful light beam from a neodymium laser in the intensity range 2X 1013-2χ 1014 W/cm2. The study of the nonlinear mechanisms of the interaction of the radiation with the plasma is of great interest for research on laser-ignited controlled thermonuclear fusion. Most papers devoted to this question deal with decay (parametric) instabilities and generation of the harmonics and subharmonics of the laser radiation. The situation here, however, is not perfectly clear, and the need for comprehensive experimental investigations in a wide range of conditions is perfectly obvious.