Effect of Ambient Pressure on the Generation and the Propagation of Plasmas Produced by Pulsed Laser Ablation of Metal Al in Air

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Abstract:

Simultaneous time-and space-resolved emission spectra from a Nd: YAG laser-ablated plasma on an Al target have yielded quantitative information on the generation and the propagation of species in the plasma. Five ambient pressures from atmosphere to 5 Pa were chosen. The experimental results showed that the characteristics of the species in the plasma were strongly influenced by the ambient pressure. The mean spatially projected ranges of Al2+ ions in the atmosphere of different densities were calculated in theory, and the slowing-down processes were simulated by using a popular Monte Carlo simulation program, TRIM90. The calculated results can be used to explain observed experimental phenomena.

Keywords: LASER PLASMA TIME-RESOLVED SPECTROSCOPY STOPPING POWER PROJECTED RANGE

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702971939758

Publication date: December 1, 1997

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