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dc.contributor.authorSakka, Tetsuoja
dc.contributor.authorTamura, Ayakaja
dc.contributor.authorNakajima, Takashija
dc.contributor.authorFukami, Kazuhiroja
dc.contributor.authorOgata, Yukio Hja
dc.contributor.alternative作花, 哲夫ja
dc.date.accessioned2012-07-18T06:25:03Z-
dc.date.available2012-07-18T06:25:03Z-
dc.date.issued2012-05-
dc.identifier.issn0021-9606ja
dc.identifier.urihttp://hdl.handle.net/2433/158350-
dc.description.abstractWe experimentally study the dynamics of the plasma induced by the double-laser-pulse irradiation of solid target in water, and find that an appropriate choice of the pulse energies and pulse interval results in the production of an unprecedentedly mild (low-density) plasma, the emission spectra of which are very narrow even without the time-gated detection. The optimum pulse interval and pulse energies are 15-30 μs and about ~1 mJ, respectively, where the latter values are much smaller than those typically employed for this kind of study. In order to clarify the mechanism for the formation of mild plasma we examine the role of the first and second laser pulses, and find that the first pulse produces the cavitation bubble without emission (and hence plasma), and the second pulse induces the mild plasma in the cavitation bubble. These findings may present a new phase of underwater laser-induced breakdown spectroscopy.ja
dc.format.mimetypeapplication/pdfja
dc.language.isoengja
dc.publisherAmerican Institute of Physicsja
dc.rights© 2012 American Institute of Physicsja
dc.subjectbubblesja
dc.subjectcavitationja
dc.subjectplasma diagnosticsja
dc.subjectplasma production by laserja
dc.subjectwaterja
dc.titleSynergetic effects of double laser pulses for the formation of mild plasma in water: toward non-gated underwater laser-induced breakdown spectroscopy.ja
dc.type.niitypeJournal Articleja
dc.identifier.ncidAA00694991ja
dc.identifier.jtitleThe Journal of chemical physicsja
dc.identifier.volume136ja
dc.identifier.issue17ja
dc.relation.doi10.1063/1.4709391ja
dc.textversionpublisherja
dc.identifier.artnum174201ja
dc.identifier.pmid22583223-
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