Shock wave and material vapour plume propagation during excimer laser ablation of aluminium samples

Publication Type

Journal Article

Date Published

10/1999

LBNL Report Number

LBNL-43859

Abstract

A probe beam deflection technique was utilized to measure the propagation of a shock wave and material vapour plume generated during excimer laser ablation of aluminium samples. The measured transit time of the laser-induced shock wave was compared with the prediction based on an ideal blast-wave model, using the Sedov-Taylor solution. The prediction of the incident laser energy converted into the laser-induced gasdynamic flow utilizing this blast-wave model overestimated the efficiency, even under conditions when the measured shock-wave velocity follows the correct model relation. The propagation of material vapour was measured from the deflection of the probe beam at later times. The propagation velocity of material vapour ranged from 20-40 m s-1 with a greater velocity near the target surface.

Journal

Journal of Physics D: Applied Physics

Volume

32

Year of Publication

1999

Short Title

J. Phys. D: Appl. Phys.

Issue

19
2578

Pagination

2578-2585