Exploratory laser-driven shock wave studies
We show the results of a feasibility study for investigating shock structure and for measuring equation-of-state parameters using high-energy, short-pulse lasers. We discuss the temporal and spatial structure of the luminosity from laser-driven shock unloading in aluminum foils. We demonstrate that shock velocity can be measured by observing the time interval between shock emergence across two thicknesses and show data for shocks of 1.3 and 2.1 Mbar. The fact that we observe shock fronts cleanly breaking through steps as small as 3 ..mu..m indicates that the shock front thickness is very small in the few megabar region; this is the first experimental verification that these fronts are not more than a few micrometers thick. We present approximate measurements of free-surface velocity. Finally, we speculate on the use of these techniques to obtain detailed equation-of-state data.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5313279
- Report Number(s):
- LA-6997-MS; TRN: 78-002722
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
EQUATIONS OF STATE
SHOCK WAVES
LASER RADIATION
FOILS
PULSE TECHNIQUES
WAVE PROPAGATION
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUATIONS
METALS
RADIATIONS
360104* - Metals & Alloys- Physical Properties
656000 - Condensed Matter Physics