Evaluation of pressure in a plasma produced by laser ablation of steel
| Autor: | Emanuel Axente, Valentin Craciun, Jörg Hermann, Aya Taleb, Frédéric Pelascini |
|---|---|
| Přispěvatelé: | Laboratoire Lasers, Plasmas et Procédés photoniques (LP3), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Laser Department, NILPRP, National Institute for Laser, Plasma and Radiation Physics (INFLPR), National Institute for Lasers, Plasma, and Radiation Physics [Magurele-Ilfov] (INFLPR), Cetim Grand Est, Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Particle diffusion
Materials science Thermodynamic equilibrium Atmospheric-pressure plasma 02 engineering and technology 7. Clean energy 01 natural sciences Analytical Chemistry Plasma modeling [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] Emission spectrum Spectroscopy Instrumentation [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Laser ablation 010401 analytical chemistry Kinetic pressure Plasma 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Plume Calibration-free LIBS Spectra simulation [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Atomic physics 0210 nano-technology |
| Zdroj: | Spectrochimica Acta Part B: Atomic Spectroscopy Spectrochimica Acta Part B: Atomic Spectroscopy, Elsevier, 2018, 143, pp.63-70. ⟨10.1016/j.sab.2018.02.015⟩ Spectrochimica Acta Part B: Atomic Spectroscopy, 2018, 143, pp.63-70. ⟨10.1016/j.sab.2018.02.015⟩ |
| ISSN: | 0584-8547 1873-3565 |
| DOI: | 10.1016/j.sab.2018.02.015⟩ |
| Popis: | International audience; We investigated the time evolution of pressure in the plume generated by laser ablation with ultraviolet nanosec-ond laser pulses in a near-atmospheric argon atmosphere. These conditions were previously identified to produce a plasma of properties that facilitate accurate spectroscopic diagnostics. Using steel as sample material, the present investigations benefit from the large number of reliable spectroscopic data available for iron. Recording time-resolved emission spectra with an echelle spectrometer, we were able to perform accurate measurements of electron density and temperature over a time interval from 200 ns to 12 µs. Assuming local thermodynamic equilibrium, we computed the plasma composition within the ablated vapor material and the corresponding kinetic pressure. The time evolution of plume pressure is shown to reach a minimum value below the pressure of the background gas. This indicates that the process of vapor-gas interdiffusion has a negligible influence on the plume expansion dynamics in the considered timescale. Moreover, the results promote the plasma pressure as a control parameter in calibration-free laser-induced breakdown spectroscopy. |
| Databáze: | OpenAIRE |
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