25 research outputs found
Laser-driven shock propagation into quartz targets driven by various drive pulse configurations: experiments
Hohlraum X-ray deposition in indirect-drive ICF ablator materials
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
[1], measurements of ablator shock velocities, shock temperatures, and
preheat temperatures were made using a 280 nm Streaked Optical Pyrometer
(SOP) [2]. The x-ray fluxes were supplied by hohlraums driven by the
University of Rochester Omega Laser [3]. More recent ablator experiments at
Omega have extended the previous work by using an absolutely calibrated
600-800 nm SOP [4] together with a line-imaging velocity interferometer [5]
similar to the diagnostic proposed for accurate National Ignition Facility
(NIF) ignition shock timing measurements [6]. 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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Studies of Dynamic Properties of Shock Compressed FCC Crystals by in Situ Dynamic X-Ray Diffraction
There were 5 laser experiments conducted to date in FY-01 under the ongoing project to study the response of single crystal fcc materials under shock compression. An additional 10 laser shots are planned for August, 2001. This work has focused on developing capability to record diffraction from multiple lattice planes during the passage of a shock through a thin foil of single crystal copper, while simultaneously performing separate shock sample recovery experiments to study the residual deformation structure in the recovered samples