Abstract

X-ray conversion efficiency measurements at short wavelength have often shown a discrepancy with theoretical (LASNEX) predictions at intensities below ~10¹⁴ W/cm². A detailed understanding of the coupling of short wavelength light to high-Z targets is necessary for extrapolation to long-pulse reactor-scale conditions, and, therefore, the reasons for this discrepancy need to be understood. We have performed a series of experiments using the University of Rochester Omega laser at 351 nm to address the existence of this discrepancy in spherical target measurements which suffer little from angular-distribution complications and to address using layered Au-on-CH targets and extensive diagnostics.

© 1985 Optical Society of America