The Laser Damage Threshold for Materials and the Relation Between Solid-Melt and Melt-Vapor Interface Velocities

Journal Article · Fri Oct 08 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3507152· OSTI ID:21436016

Khalil, Osama Mostafa ^[1]

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1. Egyptian Armed Forces, Cairo (Egypt)

Numerous experiments have demonstrated and analytic theories have predicted that there is a threshold for pulsed laser ablation of a wide range of materials. Optical surface damage threshold is a very complex and important application of high-power lasers. Optical damage may also be considered to be the initial phase of laser ablation. In this work it was determined the time required and the threshold energy of a layer of thickness to heat up. We used the Finite Difference method to simulate the process of laser-target interaction in three cases. Namely, the case before melting begins using a continuous wave (c.w) laser source and a pulsed laser source, the case after the first change of state (from solid to melt), and the case after the second change of state (from melt to vapor). And also study the relation between the solid-melt and melt-vapor interface velocities to have a commonsense of the laser ablation process.

• OSTI ID: 21436016
• Journal Information: AIP Conference Proceedings, Vol. 1278, Issue 1; Conference: International symposium on high power laser ablation 2010, Santa Fe, NM (United States), 18-22 Apr 2010; Other Information: DOI: 10.1063/1.3507152; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABLATION
ABSORPTION
COMPUTERIZED SIMULATION
DAMAGE
FINITE DIFFERENCE METHOD
INTERFACES
LASER RADIATION
LASER TARGETS
LAYERS
MELTING
PULSED IRRADIATION
SOLIDS
SURFACES
THERMAL CONDUCTIVITY
THRESHOLD ENERGY
VAPORS
VISIBLE RADIATION
CALCULATION METHODS
ELECTROMAGNETIC RADIATION
ENERGY
FLUIDS
GASES
IRRADIATION
ITERATIVE METHODS
MATHEMATICAL SOLUTIONS
NUMERICAL SOLUTION
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RADIATIONS
SIMULATION
SORPTION
TARGETS
THERMODYNAMIC PROPERTIES