Non-equilibrium and equilibrium problems in laser-induced plasmas

Capitelli, M.; Capitelli, Francesco; Елецкий, А. В.

doi:10.1016/s0584-8547(00)00168-3

Cited by 140 publications

(68 citation statements)

References 18 publications

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“…These processes correspond to the so-called radiative recombination and three-body recombination processes in which a third body may be either a heavy particle or an electron. The electron number density n e (cm À3 ) in the laser induced plasma is governed by the kinetic balance equation [20][21][22] …”

Section: à2mentioning

confidence: 99%

Time-resolved spectroscopic diagnostic of laser-induced plasma on germanium targets

Camacho

Díaz

Poyato

2011

Journal of Applied Physics

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Section: à2mentioning

confidence: 99%

Time-resolved spectroscopic diagnostic of laser-induced plasma on germanium targets

Camacho

Díaz

Poyato

2011

Journal of Applied Physics

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“…If dn e / dt = 0 an equilibrium condition can be established; if dn e / dt 0, then the ionization ͑dn e / dt Ͼ 0͒ or three-body recombination ͑dn e / dt Ͻ 0͒ prevails and the departure from the equilibrium occurs. 36 From Fig. 11 In the case of the TEA-CO 2 laser, at a laser fluence of 106 J / cm 2 and z = 5 mm, the estimated recombination rate constant is approximately 5 ϫ 10 −28 cm 6 s −1 .…”

Section: Ionization and Recombination Processesmentioning

confidence: 94%

“…These processes correspond to the so-called radiative recombination and three-body recombination processes in which a third body may be either a heavy particle or an electron. The electron number density n e ͑cm −3 ͒ in the laser-induced plasma is governed by the kinetic balance equation 35,36 dn e dt = k ion n e N i − k rec n e 3 , ͑3͒…”

Section: Ionization and Recombination Processesmentioning

confidence: 99%

Time-resolved optical emission spectroscopy of laser-produced air plasma

Camacho

Díaz

Santos

et al. 2010

Journal of Applied Physics

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Nonmonotonic radial distribution of excited atoms in a positive column of pulsed direct currect discharges in helium Appl. Phys. Lett. 102, 034104 (2013) Iterative Boltzmann plot method for temperature and pressure determination in a xenon high pressure discharge lamp J. Appl. Phys. 113, 043303 (2013) Surface loss probability of H radicals on silicon thin films in SiH4/H2 plasma J. Appl. Phys. 113, 013303 (2013) A large volume uniform plasma generator for the experiments of electromagnetic wave propagation in plasma Phys. Plasmas 20, 012101 (2013) Diagnosing the plasma nonuniformity in an iron opacity experiment by spatially resolved Al 1s-2p absorption spectroscopy Phys. Plasmas 19, 123301 (2012) Additional information on J. Appl. Phys. The results show a faster decay of continuum and ionic spectral species than of neutral atomic and molecular ones. The velocity and kinetic energy distributions for the different species were obtained from time-of-flight measurements. Excitation temperature and electron density in the laser-induced plasma were estimated from the analysis of spectral data at various times from the laser pulse incidence. Temporal evolution of electron density has been used for the estimation of the three-body recombination rate constant.

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“…The concentration of species can be estimated if the plasma obtained is optically thin plasma and also the condition of Stoichiometric ablation and LTE are satisfied 32,34 . The state of LTE will be best achieved typically after 1 µs of plasma formation for ns laser produced plasmas.…”

Section: Spectral Analysismentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy for Classification of High Energy Materials using Elemental Intensity Ratios

Gundawar¹,

Rao²

2014

DSJ

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A simple, yet efficient, methodology is proposed to classify three high energy materials (HEMs) with diverse composition using nanosecond laser induced breakdown spectroscopic data. We have calculated O/N, N/H, and O/H elemental peaks ratios using a ratiometric method. The present work describes a novel way to construct 1D, 2D, and 3D classification model using the above mentioned ratios. Multivariate statistical methods are followed for construction of the classification models. A detailed procedure for classification of three different HEMs is presented here.

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Non-equilibrium and equilibrium problems in laser-induced plasmas

Cited by 140 publications

References 18 publications

Time-resolved spectroscopic diagnostic of laser-induced plasma on germanium targets

Time-resolved spectroscopic diagnostic of laser-induced plasma on germanium targets

Time-resolved optical emission spectroscopy of laser-produced air plasma

Laser Induced Breakdown Spectroscopy for Classification of High Energy Materials using Elemental Intensity Ratios

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