Electron and ion stagnation at the collision front between two laser produced plasmas

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dc.contributor.author Hough, Pádraig
dc.contributor.author McLoughlin, Conor
dc.contributor.author Kelly, Thomas J.
dc.contributor.author Hayden, Patrick
dc.contributor.author Harilal, Sivanandan S.
dc.contributor.author Mosnier, Jean-Paul
dc.contributor.author Costello, John T.
dc.date.accessioned 2012-04-10T14:57:04Z
dc.date.available 2012-04-10T14:57:04Z
dc.date.copyright 2009 IOP Publishing en
dc.date.issued 2009-03-07
dc.identifier.citation Journal of Physics D: Applied Physics en
dc.identifier.issn 0022-3727 (Print)
dc.identifier.issn 1361-6463 (Online)
dc.identifier.uri http://hdl.handle.net/10197/3557
dc.description.abstract We report results from a combined optical interferometric and spectrally resolved imaging study on colliding laser produced aluminium plasmas. A Nomarski interferometer was used to probe the spatio-temporal distribution of the electron density at the collision front. Analysis of the resulting interferograms reveals the formation and evolution of a localised electron density feature with a well defined profile reminiscent of a stagnation layer. First signs of electron stagnation are observed at a time delay of 10 ns after the peak of the plasma generating laser pulse. The peak electron density was found to exceed 1019 cm−3 and the layer remained well defined up to a time delay of ca. 100 ns. Temporally and spectrally resolved optical imaging was also undertaken to compare the Al+ ion distribution, with that of the 2D electron density profile. This revealed nascent stagnation of singly charged ions at a delay time of 20 ns. We attribute these results to the effects of space charge separation in the seed plasma plumes. en
dc.description.sponsorship Science Foundation Ireland en
dc.description.sponsorship Higher Education Authority en
dc.description.sponsorship Irish Research Council for Science, Engineering and Technology en
dc.format.extent 2900015 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Institute of Physics en
dc.subject Plasmas en
dc.subject Lasers en
dc.subject Electron density profile en
dc.subject Ion distribution en
dc.subject Stagnation layer en
dc.subject Colliding plasmas en
dc.subject.lcsh Laser plasmas en
dc.subject.lcsh Electron distribution en
dc.subject.lcsh Plasma dynamics en
dc.subject.lcsh Laser ablation en
dc.title Electron and ion stagnation at the collision front between two laser produced plasmas en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions http://dx.doi.org/10.1088/0022-3727/42/5/055211 en
dc.status Peer reviewed en
dc.identifier.volume 42 en
dc.identifier.issue 5 en
dc.identifier.startpage 055211-1 en
dc.identifier.endpage 055211-6 en
dc.identifier.doi 10.1088/0022-3727/42/5/055211
dc.neeo.contributor Hough|Pádraig|aut| en
dc.neeo.contributor McLoughlin|Conor|aut| en
dc.neeo.contributor Kelly|Thomas J.|aut| en
dc.neeo.contributor Hayden|Patrick|aut| en
dc.neeo.contributor Harilal|Sivanandan S.|aut| en
dc.neeo.contributor Mosnier|Jean-Paul|aut| en
dc.neeo.contributor Costello|John T.|aut| en
dc.description.admin ti, ke, ab, st, en, li - TS 27.03.12 en

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