Accelerated expansion of laser-ablated materials near a solid surface

Journal Article · Thu Nov 30 23:00:00 EST 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.75.4706· OSTI ID:277364

Chen, K R; Leboeuf, J N; Wood, R F; Geohegan, D B; Donato, J M; Liu, C L; Puretzky, A A ^[1]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071 (United States)

A dynamic source effect that accelerates the expansion of laser-ablated material in the direction perpendicular to the target is demonstrated. A self-similar theory shows that the maximum expansion velocity is proportional to {ital c}{sub {ital s}}/{alpha}, where 1{minus}{alpha} is the slope of the velocity profile and {ital c}{sub {ital s}} is the sound speed. Numerical hydrodynamic modeling is in good agreement with the theory. A dynamic partial ionization effect is also studied. With these effects, {alpha} is reduced and the maximum expansion velocity is significantly increased over that found from conventional models. {copyright} {ital 1995 The American Physical Society.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 277364
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 75; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ABLATION
DYNAMICS
EXPANSION
LASER RADIATION
PLASMA DIAGNOSTICS
SOLIDS