From microjoules to megajoules and kilobars to gigabars:probing matter at extreme states of deformation*
Abstract not provided
42 ENGINEERING↗
Engineering topics
Wark, J
Publications and source records attributed to Wark, J.
From micojoules to megajoules and kilobars to gigabar:probing matter at extreme states of deformation
Abstract not provided
42 ENGINEERING↗
X-Ray Diffraction on NIF
The National Ignition Facility (NIF) is currently a 192 beam, 1.6 MJ laser. NIF Ramp-Compression Experiments have already made the relevant exo-planet pressure range from 1 to 50 Mbar accessible. We Proposed to Study Carbon Phases by X-Ray Diffraction on NIF. Just a few years ago, ultra-high pressure phase diagrams for materials were very 'simple'. New experiments and theories point out surprising and decidedly complex behavior at the highest pressures considered. High pressures phases of aluminum are also predicted to be complex. Recent metadynamics survey of carbon proposed a dynamic pathway among multiple phases. We need to develop diagnostics and techniques to explore this new regime of highly compressed matter science. X-Ray Diffraction - Understand the phase diagram/EOS/strength/texture of materials to 10's of Mbar. Strategy and physics goals: (1) Powder diffraction; (2) Begin with diamond; (3) Continue with metals etc.; (4) Explore phase diagrams; (5) Develop liquid diffraction; and (6) Reduce background/improve resolution.
70 PLASMA PHYSICS AND FUSION TECHNOLOGY↗