Journal
JOURNAL OF APPLIED PHYSICS
Volume 114, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4812577
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Funding
- Deutsche Forschungsgemeinschaft [1141/11]
- Flemish Fund for Scientific Research (FWO Vlaanderen)
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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(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. (C) 2013 AIP Publishing LLC.
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