Time Resolved Diagnostic of Dual-Pulsed Laser Ablation on Graphite Targets

• DOI: 10.1063/1.2406002
• Publication Date: 2006-12-13T23:08:17Z
• Authors: R. Sanginés de C...; C. Sánchez Aké; H. Sobral; M. Villagrán-Muniz
• Keywords: Laser Ablation; Electron temperature; Excimer; Temporal resolution

Plasma emission produced by Dual Pulsed Laser Ablation (DPLA) on two perpendicular graphite targets, separated 3 mm, was analyzed. carried out in vacuum (10−6 Torr) an excimer (248 nm) and a Nd: YAG (1064 lasers, delayed up to 20 μs. Spatial temporal measurements were performed time resolved optical spectroscopy, fast photography color interferometry. Time of flight studied order determine the kinetic energies from carbon species (C I, C II III). Comparison between dual‐laser single laser ablation reveals that, ion energy distribution can be controlled changing pulse delay lasers. Results show that highest reduction second velocities occurs at lasers 1 5 Under these experimental conditions, evolution temperature, electron neutral densities determined. Two colors interferometry allows study plasma only 1.5 mm surface target. Thus no changes density values dual experiments observed. On other hand, spectroscopy shows increase temperature configuration distance 10