The role of mass removal mechanisms in the onset of ns-laser induced plasma formation
- Department of Physics and Optimas Research Center, TU Kaiserslautern, 67653 Kaiserslautern (Germany)
- CEA, DAM, DIF, F-91297 Arpajon (France)
- CEA, DEN, SEARS, LANIE, F-91191 Gif-sur-Yvette (France)
- Department of Mathematics, University of Tennessee, 37996-1320 Knoxville, Tennessee (United States)
- Department of Chemistry, University of Antwerp, 2610 Wilrijk (Belgium)
The present study focuses on the role of mass removal mechanisms in ns-laser ablation. A copper sample is placed in argon, initially set at standard pressure and temperature. Calculations are performed for a 6 ns laser pulse with a wavelength of 532 nm and laser fluences up to 10 J/cm{sup 2}. The transient behavior in and above the copper target is described by a hydrodynamic model. Transmission profiles and ablation depths are compared with experimental results and similar trends are found. Our calculations reveal an interesting self-inhibiting mechanism: volumetric mass removal in the supercritical region triggers plasma shielding and therefore stops proceeding. This self-limiting process indicates that volumetric mass removal does not necessarily result in large ablation depths.
- OSTI ID:
- 22122797
- Journal Information:
- Journal of Applied Physics, Vol. 114, Issue 2; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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