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J. Phys. IV France 133 (2006) 179-181
Hohlraum X-ray deposition in indirect-drive ICF ablator materialsR.E. Olson1, R.J. Leeper1, G.A. Rochau1, D.K. Bradley2, P.M. Celliers2 and T.R. Boehly3
1 Sandia National Laboratories, Albuquerque, New Mexico, USA
2 Lawrence Livermore National Laboratory, Livermore, California, USA
3 University of Rochester Laboratory for Laser Energetics, Rochester, New York, USA
Accurate measurements of shock timing and ablator x-ray burnthrough will be essential for the successful ignition of an indirect-drive inertial confinement fusion (ICF) capsule. In previous work , measurements of ablator shock velocities, shock temperatures, and preheat temperatures were made using a 280 nm Streaked Optical Pyrometer (SOP) . The x-ray fluxes were supplied by hohlraums driven by the University of Rochester Omega Laser . More recent ablator experiments at Omega have extended the previous work by using an absolutely calibrated 600-800 nm SOP  together with a line-imaging velocity interferometer  similar to the diagnostic proposed for accurate National Ignition Facility (NIF) ignition shock timing measurements . Important new information has been obtained relating to ablator surface movement prior to shock breakout, ablator preheat temperature, and preheat effects on the anvil and window components of the shock timing diagnostic system.
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