The possibility of using vacuum insulation to stop hot electrons from preheating the interior of a fusion target has been investigated for high-power CO2 laser irradiation. In a double-foil flat-target configuration, hot electron energy transported from the front illuminated surface to the back foil is measured as a function of hot electron temperature, foil separation, and front foil parameters such as Z value, thickness, area, and density.

© 1982 Optical Society of America

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