Nonuniformities in laser-ablated plasma
Abstract
With long pulse-duration (4 nsec), moderate intensity (approximately 10 to 13th power W/cm squared) Nd-laser illumination of planar targets, evidence is found in images of X-ray, 3/2 omega 0 and 2 omega 0 emission for filamentation of the incident beam. Calculations indicate that this may be due to thermal self-focusing of hot spots in the laser. X-ray images show spots and spicules, jets of material flow which appear to follow the fluid flow from the target. These may be attributed to the presence of microscopic impurities on our laser-irradiated foil targets.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1982
- Bibcode:
- 1982STIN...8324844H
- Keywords:
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- Laser Fusion;
- Laser Targets;
- Planar Structures;
- Ablation;
- Focusing;
- Pulse Duration;
- X Ray Imagery;
- Lasers and Masers