A computational model for selected emission transitions in a laser produced lithium ablation plume

Stapleton, M. W.; Mosnier, Jean-Paul

doi:10.1016/s0169-4332(02)00306-9

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…As the plume expands, its thermal energy is progressively transformed into kinetic energy, while its temperature and density rapidly drop down, until an inertial stage characterized by a constant expansion velocity is reached (typically at ≈ 1 mm from the target surface). At this late stage, the contribution of the hydrodynamic cooling to the temperature drop becomes negligible with respect to that of the other mechanisms [16]. This has also been confirmed by numerical simulations of nanoparticles expansion carried out in conditions similar to those of our experiment, and not reported here.…”

Section: Table II -Cooling Rates For Radiative Emission (Re) Evaporat...supporting

confidence: 89%

Emission of nanoparticles during ultrashort laser irradiation of silicon targets

Amoruso¹,

Bruzzese²,

Spinelli³

et al. 2004

Europhys. Lett.

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We have experimentally observed that nanoparticles emission is a peculiar feature of matter removal during ultrashort (fs) laser pulse irradiation of silicon followed by vacuum expansion. Time-resolved optical emission spectroscopy has been used to characterize the plume expansion dynamics, while atomic force microscopy analysis of silicon nanoparticles deposited after 100 fs laser ablation has shown an average particle size of ≈ 7 nm, with a pretty narrow size distribution. This is in agreement with the predictions of recent theoretical models on the mechanisms underlying ablation of solids in this ultrashort temporal regime. Finally, a phenomenological model of nanoparticles cooling during their vacuum expansion has allowed us to single out radiative cooling as the most effective cooling mechanism in the late stage of plume expansion.

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Section: Table II -Cooling Rates For Radiative Emission (Re) Evaporat...supporting

confidence: 89%

Emission of nanoparticles during ultrashort laser irradiation of silicon targets

Amoruso¹,

Bruzzese²,

Spinelli³

et al. 2004

Europhys. Lett.

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show abstract

“…It is also widely applied for thin film deposition or nanoparticle manufacturing [1][2][3]. In theory, significant efforts are being devoted to the modeling of diverse and complex processes occurring upon light-matter interaction [4][5][6][7][8][9][10]. One can find more details about theoretical and experimental aspects of LIP in two recent reviews [11,12].…”

Section: Introductionmentioning

confidence: 99%

Experimental verification of a radiative model of laser-induced plasma expanding into vacuum

Gornushkin

Kazakov

Omenetto

et al. 2005

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…The results of the various models turn out to be similar, independent of the nature of density gradient employed (Stapleton & Mosnier 2002). For sake of brevity, radiation losses are neglected.…”

Section: Separation Of Electrons and Ions In Laser-induced Plasmamentioning

confidence: 75%

Dynamics of plasma expansion in the pulsed laser material interaction

Kumar

Dash

Tyagi

et al. 2010

Sadhana

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A pulse Nd: YAG laser with pulse duration 5-10 ns, beam radius at focal point 0·2-0·4 mm, wavelengths 1064 nm, 532 nm and 238 nm with linearly polarized radiation and Gaussian beam profile, was impacted on a thin foil of titanium metal for generating plasma plume. Numerically, the above parameters were linked with average kinetic energy of the electrons and ions in the laser-induced plasma. In the present model, electrons having higher velocities are assumed to escape from plasma, that forms a negatively charged sheath around the plasma. It is seen from present computations that the forward directed nature of the laser evaporation process results from the anisotropic expansion velocities associated with different species. These velocities are mainly controlled by the initial dimension of the expanding plasma. An attempt was undertaken to estimate the length of the plume at different ambient gas pressures using an adiabatic expansion model. The rate of the plasma expansion for various Ar + ion energies was derived from numerical calculations. A numerical definition of this plasma includes events like collisional/radiative, excitation/de-excitation and ionization/recombination processes involving multiples of energy levels with several ionization stages. Finally, based on a kinetic model, the plasma expansion rate across the laser beam axis was investigated.

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A computational model for selected emission transitions in a laser produced lithium ablation plume

Cited by 9 publications

References 9 publications

Emission of nanoparticles during ultrashort laser irradiation of silicon targets

Emission of nanoparticles during ultrashort laser irradiation of silicon targets

Experimental verification of a radiative model of laser-induced plasma expanding into vacuum

Dynamics of plasma expansion in the pulsed laser material interaction

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