High Intensity Laser Coupling to a Cone Geometry for Fast Ignition

Details High Intensity Laser Coupling to a Cone Geometry for Fast Ignition High Intensity Laser Coupling to a Cone Geometry for Fast Ignition

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..apr8he072s&link_type=abstract

American Physical Society, 2008 APS April Meeting and HEDP/HEDLA Meeting, April 11-15, 2008, abstract #8HE.072

Physics

Scientific paper

The short -pulse laser, which ignites a fast ignition target, gains access to the compressed core through a reentrant cone that maintains a clear path through the blow-off plasma. The interaction of the laser with the cone surface is complex due to light and electron focusing by the cone walls. Furthermore, plasma produced by the prepulse can affect the interaction physics and electron transport. We report on experiments to study this, performed using Titan Laser facility (2x10^20 W cm-2). We imaged Cu Kα fluorescence in flat foils to show for the first time that the laser-generated electrons from glancing incidence light have no significant forward direction. Fluorescence images from cones support this conclusion, showing the electrons spread essentially randomly up to several hundred microns from a cone tip independent of focus conditions.

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