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Title: The role of mass removal mechanisms in the onset of ns-laser induced plasma formation

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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [1]
  1. Department of Physics and Optimas Research Center, TU Kaiserslautern, 67653 Kaiserslautern (Germany)
  2. (Belgium)
  3. CEA, DAM, DIF, F-91297 Arpajon (France)
  4. CEA, DEN, SEARS, LANIE, F-91191 Gif-sur-Yvette (France)
  5. Department of Mathematics, University of Tennessee, 37996-1320 Knoxville, Tennessee (United States)
  6. Department of Chemistry, University of Antwerp, 2610 Wilrijk (Belgium)
Publication Date:
OSTI Identifier:
22122797
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 2; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABLATION; ARGON; COPPER; HYDRODYNAMICS; LASER RADIATION; LIGHT TRANSMISSION; MASS; PLASMA PRODUCTION; PULSES; TRANSIENTS; WAVELENGTHS