Two-color interferometry and fast photography measurements of dual-pulsed laser ablation on graphite targets

Plasma generated by dual pulsed synchronized laser ablation onto two perpendicular graphite targets in vacuum was analyzed by two-color interferometry and fast photography. The delay between the firing of the lasers was varied up to 5 μs. Electron and neutral densities values at 0.5 mm from the second pulse target were 1.3×1018cm−3 and 3.0×1019cm−3 respectively.