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Observations of High Density Plasmas Produced with a Picosecond, High Power KrF Laser

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The interaction of a single picosecond, high power KrF laser pulse with solid targets has been studied using time integrated and time resolved x-ray spectroscopy. Fully ionised aluminium plasmas with temperatures of about 400 eV and densities well above 1023 cm−3 were observed when the ASE prepulse energy was less than 10−5 of the short pulse. About 20% of the incident laser energy was deposited in suprathermal electrons. This value was inferred from titanium Kα emission measurements. The experimental observations were modelled with a 1-D Lagrangian hydrodynamics code.

© 1989 Optical Society of America

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