Investigation of the local thermodynamic equilibrium of laser-induced aluminum plasma by Thomson scattering technique

2014
journal article
article
dc.abstract.enA laser Thomson scattering method was applied to investigate the local Saha–Boltzmann equilibrium in aluminum laser-induced plasma. Plasma was created in ambient air using 4.5 ns pulses from a Nd:YAG laser at 532 nm, focused on an Al target. Spatially resolved measurements, performed for the time interval between 600 ns and 3 μs, show electron density and temperature to decrease from 3.4 × 1023 m− 3 to 0.5 × 1023 m− 3 and from 61,000 K to 13,000 K in the plasma core. The existence of local thermodynamic equilibria in the plasma was verified by comparing the rates of the collisional to radiative processes (the McWhirter criterion), as well as relaxation times and diffusion lengths of different plasma species, with the appropriate rate of electron density evolution and its gradients at given, experimentally determined, electron temperatures. We found these criteria to be much easier to satisfy for metallic plasma species than for nitrogen. The criteria are also easier to satisfy in the plasma core of higher electron density.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiegopl
dc.contributor.authorMendys, Agata - 103697 pl
dc.contributor.authorKański, Michałpl
dc.contributor.authorFarah-Sougueh, Alipl
dc.contributor.authorPellerin, Stephanepl
dc.contributor.authorPokrzywka, Bartłomiejpl
dc.contributor.authorDzierżęga, Krzysztof - 127858 pl
dc.date.accessioned2015-01-22T19:16:33Z
dc.date.available2015-01-22T19:16:33Z
dc.date.issued2014pl
dc.description.admin[AB] Kański, Michał 50000139
dc.description.admin[AB] Farah-Sougueh, Ali 50000139
dc.description.physical61-68pl
dc.description.publication0,5pl
dc.description.volume96pl
dc.identifier.doi10.1016/j.sab.2014.03.009pl
dc.identifier.eissn1873-3565pl
dc.identifier.issn0584-8547pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/2674
dc.languageengpl
dc.language.containerengpl
dc.rightsDodaję tylko opis bibliograficzny*
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dc.subject.enlaser-induced plasmapl
dc.subject.enThomson scatteringpl
dc.subject.enlaser-induced breakdown spectroscopypl
dc.subject.enlocal thermodynamic equilibriumpl
dc.subtypeArticlepl
dc.titleInvestigation of the local thermodynamic equilibrium of laser-induced aluminum plasma by Thomson scattering techniquepl
dc.title.journalSpectrochimica Acta. Part B, Atomic Spectroscopypl
dc.typeJournalArticlepl
dspace.entity.typePublication
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