Simulations of controlled spectral emission of Al plasmas generated by temporally tailored laser irradiation

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

DOI:https://doi.org/10.1063/1.3507117· OSTI ID:21426588

Colombier, J P; Guillermin, M; Garrelie, F; Audouard, E; Stoian, R ^[1]

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1. Laboratoire Hubert Curien, UMR 5516 CNRS, Universite de Lyon, Universite Jean Monnet, 42000 Saint Etienne (France)

Hydrodynamics simulations and irradiation experiments were performed to correlate ul-trashort intensity envelopes of the laser fields and thermodynamical states reached by the emerging plasma phase in ablation regimes. We discuss the efficiency of energy coupling as a function of different intensity envelopes and the resulting temperature, density and ionization states since the energy delivery rate is an essential factor that predetermines the material thermodynamic evolution. Subsequently, we examine the plasma composition in calculating the proportion of neutral/ion species typical of LIBS signals and comparing it with neutral/ion ratios given by experimental results. Moreover, the calculations allow to investigate the efficiency of nanoparticles generation from materials subjected to different heating rates. These can be related to hydrodynamic ejection of nanosized liquid layers upon the action of mechanic waves. With support from numerical simulations of the hydrodynamic advance of the excited matter, experiments revealed that mastering intensity envelopes of ultrashort laser pulse leads to further control on the ablation products. Emerging plasma phase in a hot state generates specific spectral emission patterns that can serve as indicators for its controlled formation and kinetic evolution.

• OSTI ID: 21426588
• 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: 10.1063/1.3507117; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABLATION
ALUMINIUM
COMPUTERIZED SIMULATION
HEATING RATE
HYDRODYNAMICS
IONIZATION
IONS
LASER RADIATION
LASER-PRODUCED PLASMA
LAYERS
NANOSTRUCTURES
PARTICLES
PLASMA SIMULATION
PULSED IRRADIATION
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUID MECHANICS
IRRADIATION
MECHANICS
METALS
PLASMA
RADIATIONS
SIMULATION