Precision-Scale Explosion Experiments Using Laser-Driven Shocks.
NAVAL RESEARCH LAB WASHINGTON DC
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The Naval Research Laboratory uses shock initiated by a powerful laser pulse to perform precision scale measurements of hydrodynamic phenomena relevant to nuclear and conventional explosions, and to supernovae. A pulse from NRLs 1.3-kJ Pharos III laser is focused onto the surface of a period sized piece of material placed in ambient gas. The laser heats the material to a few hundred eV creating a miniature explosion which launches a shock with multi-kilobar pressures and material flows with Mach number of a few hundred. This method has been used to perform the first measurements on a shock instability in a uniform ambient, the first measurements of shock decursors, and detailed measurements of shock precursors.
- Lasers and Masers