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Numerical modeling of pulsed laser evaporation of aluminum targets

Publication Type

Journal Article

Authors

Jeong, Sungho, Ralph Greif, Richard E Russo

Abstract

A one dimensional thermal model was used to investigate the pulsed laser evaporation of aluminum targets. The gasdynamic flow of the vapor was predicted by solving one dimensional compressible flow equations for an inviscid fluid. The variation of the threshold laser fluence for target evaporation with respect to target surface reflectivity was investigated. The threshold laser fluence predicted by a thermal evaporation model was larger than the values obtained experimentally. The effects of the ambient pressure and the laser fluence on the local Mach number of the vapor at the edge of the Knudsen layer were studied. The structure of the gasdynamic flow including the shock wave and the contact surface was shown in the density profiles. (C) 1998 Elsevier Science B.V

Journal

Applied Surface Science

Volume

129

Year of Publication

1998

Notes

LBNL-41215 NOT IN FILE

Organization

Laser Technologies Group, Energy Storage and Distributed Resources Division