Research with High-Power Short-Wavelength Lasers
- 13 September 1985
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 229 (4718) , 1045-1051
- https://doi.org/10.1126/science.229.4718.1045
Abstract
Three high-temperature, high-density experiments were conducted recently with the 10-terawatt, short-wavelength Novette laser system at the Lawrence Livermore National Laboratory. The experiments demonstrated successful solutions to problems that arose during previous laser-plasma interaction experiments with long-wavelength (greater than 1 micrometer) lasers: (i) large-scale plasmas, with dimensions approaching those needed for high-gain inertial fusion targets, were produced in which potentially deleterious laser-plasma instabilities were collisionally damped; (ii) deuterium-tritium fuel was imploded to a density of 20 grams per cubic centimeter and a pressure of 10 10 atmospheres under the improved laser conditions, and compression conditions (preheating and pressure) were consistent with code calculations that predict efficient (high-gain) burn of a large thermonuclear fuel mass when driven with a large, short-wavelength laser; and (iii) soft x-rays were amplified by a factor of 700 by stimulated emission at 206 and 209 angstroms (62 electron volts) from selenium ions in a laser-generated plasma. These small, short-pulse x-ray sources are 10 10 to 10 11 times brighter than the most powerful x-ray generators and synchrotron sources available today. The plasma conditions for these experiments were made possible by advances in Nd:glass laser technology, in techniques to generate efficiently its short-wavelength harmonics at 0.53, 0.35, and 0.26 micrometers, and in diagnostic and computational modeling.Keywords
This publication has 38 references indexed in Scilit:
- Ultrahigh-Pressure Laser-Driven Shock-Wave Experiments at 0.26 μm WavelengthPhysical Review Letters, 1984
- Amplification of ultraviolet radiation in a laser plasmaSoviet Journal of Quantum Electronics, 1983
- The variation of mass ablation rate with laser wavelength and target geometryOptics Communications, 1982
- High power pulsed lasersJournal of Fusion Energy, 1982
- Critical elements of high gain laser fusionJournal of Fusion Energy, 1981
- Theory of high efficiency third harmonic generation of high power Nd-glass laser radiationOptics Communications, 1980
- Demonstration of high efficiency third harmonic conversion of high power Nd-glass laser radiationOptics Communications, 1980
- Laser beam brightness improvement with high power spatial filteringOptics Communications, 1976
- The asterix III pulsed high-power iodine laserIEEE Journal of Quantum Electronics, 1976
- Laser Compression of Matter to Super-High Densities: Thermonuclear (CTR) ApplicationsNature, 1972