Abstract
Imprinted modulations in optical depth of a thin Si foil due to 0.35 \ensuremath{\mu}m laser irradiation at about $3\ifmmode\times\else\texttimes\fi{}{10}^{12}$ W/c${\mathrm{m}}^{2}$ have been measured at shock breakout. These measurements were made by high resolution face-on radiography using a gain saturated yttrium x-ray laser backlighter operating at a wavelength of 15.5 nm with a multilayer optics imaging system. The imprinted modulation due to a static speckle pattern and a 0.29 and a 0.33 THz spectral dispersion smoothed speckle pattern were studied. Comparison of the imprinted modulation is made with simulations.
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