Dense strongly coupled plasma in double laser pulse ablation of lithium: Experiment and simulation

作者：Kumar Ajai^*; Sivakumaran V; Ashwin J; Ganesh R; Joshi H C

来源：Physics of Plasmas, 2013, 20(8): 082708.

DOI：10.1063/1.4818992

In a simple method of low power nano-second double pulsed laser ablation experiment in collinear geometry, formation of high density strongly coupled plasma is demonstrated. Using time-resolved measurements of the Stark broadened line width and line intensity ratio of the emission lines, the density and temperature of the plasma were estimated respectively. In this experiment, it is shown that ions are strongly coupled (ion-ion coupling parameter comes out to be >4). For comparison, both single and double pulsed laser ablations are presented. For the estimated experimental plasma parameters, first principle Langevin dynamics simulation corroborates the existence of a strongly coupled regime.

• 出版日期2013-8