SIMULTANEOUS MONITORING OF ABLATIVE SHOCKS IN AIR BY HIGH-SPEED CINEHOLOGRAPHY AND MULTIPLE-PASS BEAM DEFLECTION PROBE

Two complementary techniques have been developed to monitor the spatia l and temporal evolution of non-reproducible optodynamic events. These techniques have been applied to investigate the shock dynamics result ing from the laser ablation of metallic samples. A high-speed cineholo graphy system provides a sequence of spatially resolved information (8 holograms separated by 28 ns) while a beam deflection probe provides temporally resolved information at 6 discrete spatial points over a 4. 5 mm distance above the target.