Single shot ultrafast dynamic ellipsometry (UDE) of laser-driven shocks in single crystal explosives

Conference · Thu Jan 01 04:00:00 EST 2009

OSTI ID:991257

Whitley, Von H ^[1]; Mcgrane, Shawn D ^[1]; Moore, David S ^[1]; Eakins, Dan E ^[1]; Bolme, Cindy A ^[1]

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1. Los Alamos National Laboratory

We report on the first experiments to measure states in shocked energetic single crystals with dynamic ellipsometry. We demonstrate that these ellipsometric techniques can produce reasonable Hugoniot values using small amounts of crystalline RDX and PETN. Pressures, particle velocities and shock velocities obtained using shocked ellipsometry are comparable to those found using gas-gun flyer plates and molecular dynamics calculations. The adaptation of the technique from uniform thin films of polymers to thick non-perfect crystalline materials was a significant achievement. Correct sample preparation proved to be a crucial component. Through trial and error, we were able to resolve polishing issues, sample quality problems, birefringence effects and mounting difficulties that were not encountered using thin polymer films.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 991257
• Report Number(s): LA-UR-09-04798; LA-UR-09-4798
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
47 OTHER INSTRUMENTATION
BIREFRINGENCE
COMPRESSION
ELLIPSOMETRY
EXPLOSIVES
MONOCRYSTALS
PLATES
POLISHING
POLYMERS
SAMPLE PREPARATION
THIN FILMS