Portal de Periódicos da CAPES

Upgrade of the OMEGA laser system

1992; SPIE; Volume: 1627; Linguagem: Inglês

10.1117/12.60169

1996-756X

T. R. Boehly, R. S. Craxton, R.J. Hutchison, J. H. Kelly, Terrance J. Kessler, S. Kumpan, S. Letzring, R. L. McCrory, Samuel Finley Breese Morse, W. Seka, S. Skupsky, J. M. Soures, C. P. Verdon,

Laser-Matter Interactions and Applications

Funding for the OMEGA laser Upgrade project has been approved and the design of a 30-kJ, 351-nm, 60-beam laser system has begun. This system will provide a unique capability to validate high-performance, direct-drive laser-fusion targets. We highlight various design features of a system that will attain 1% - 2% irradiation uniformity with versatile pulse shaping, thus providing a wide range of irradiation options for direct-drive experiments. The Nd:glass laser system consists of 60 beamlines using 20-cm disk power-amplifiers, frequency- tripling, phase conversion with diffractive optics, and smoothing by spectral dispersion (SSD). The initial pulse shape will be achieved by co-axial propagation of two beams having different pulse widths. These 'main' and 'foot' pulses will occupy different portions of the laser aperture. In addition, electro-optic technology will be used for shaping and truncation of these pulses.