MECHANISMS OF LASER-SURFACE INTERACTIONS
HONEYWELL INC HOPKINS MN CORPORATE RESEARCH CENTER
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This report describes experimental and theoretical investigations of the particle emission produced in the laser-surface interaction. Preliminary measurements on the angular distribution of ions emitted from a tungsten target at power levels around 14 MW per sq. cm. indicate anisotropy of the emission, with a strong enhancement in directions near the normal to the target. Ion and neutral molecule emission from laser-irradiated sodium targets are described. Calculations on the free expansion of the laser-produced blow off material, which include the asymptotic velocity of the expansion, yield pulse shapes similar to those observed experimentally if a high initial temperature is assumed. The magnitudes and time histories of shock waves produced in the target by absorption of the laser radiation have been calculated.
- Physical Chemistry
- Plasma Physics and Magnetohydrodynamics
- Solid State Physics