GEKKO/HIPER laser driven shock waves and equation-of-state experiments
Abstract
The GEKKO/HIPER-laser driven shock experiments were characterized for studies on equation-of-state (EOS) at ultra-high pressures. High-quality shock waves were produced with the bundled 9 laser beams optically smoothed by spectral dispersion technique and Kinoform phase plates. The laser beams were focused on targets at up to an intensity of 10^14 W/cm^2 with a wavelength of 351 nm and a duration of 2.5 ns. The spatial uniformity and temporal steadiness of shock wave, and the preheating effect were investigated by measurements of the self-emission and reflectivity from target rear surface. Our experimental and analytical methods were validated by using double-step targets consisting of two Hugoniot standard metals. Extreme pressures only accessed in nuclear explosion experiments were generated with reproducibility. It was indicated that new EOS data could be obtained for materials ranging from low to high density.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2003
- Bibcode:
- 2003APS..DPPQP1166O