Charge resolved electrostatic diagnostic of colliding copper laser plasma plumes

DC FieldValueLanguage
dc.contributor.authorYeates, P-
dc.contributor.authorFallon, Conor-
dc.contributor.authorKennedy, E.T.-
dc.contributor.authorCostello, John T.- American Institute of Physicsen
dc.identifier.citationPhysics of Plasmasen
dc.description.abstractThe collision of two laser generated plasma plumes can result, under appropriate conditions, in the formation of ‘stagnation layer’. The processes underlying this phenomenon are complex and time dependent. The majority of experiments over the last few decades have focused upon spectroscopic diagnostic of colliding plasmas. We have performed electrostatic diagnosis of multiply charged copper ions (Cu+ to Cu5+) generated via Q-switched pulsed laser (λ=1.06 μm, τ=6 ns, EL=52-525 mJ) generation of copper plasma plumes from a planar target. Time dependent current traces, charge yields and kinetic energy (Ke) distributions are obtained for single plasma plumes (Sp) and colliding plasma plumes (Cp). The charge yield from a Cp relative to twice that from a Sp is characterized by a charge yield ratio (CYR) parameter. Superior ion yields for all charge states occur for a discrete range of fluences (F) from colliding plasma plumes leading to a CYR parameter exceeding unity. The kinetic energy distributions from colliding plasma plumes display well defined energy compression via narrowing of the distributions for all fluences and charge states. The extent of this energy compression is charge dependent. Space charge forces within the stagnation layer and the resulting charge dependent acceleration of ions is proposed to account for the transfer of ion kinetic energy in favour of collisional ionization mechanisms.en
dc.description.sponsorshipScience Foundation Irelanden
dc.description.sponsorshipHigher Education Authorityen
dc.description.sponsorshipOther funderen
dc.format.extent732151 bytes-
dc.publisherAmerican Institute of Physicsen
dc.rightsThe following article appeared in Physics of Plasmas 18, 103104 (2011), DOI:10.1063/1.3633486 and may be found at The article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.en
dc.subjectCopper colliding plasmaen
dc.subjectFaraday cupen
dc.subjectGridded retarding field analyzeren
dc.subjectCharge resolveden
dc.subjectCharge yielden
dc.subjectEnergy compressionen
dc.subject.lcshLaser plasmasen
dc.subject.lcshLinear acceleratorsen
dc.titleCharge resolved electrostatic diagnostic of colliding copper laser plasma plumesen
dc.typeJournal Articleen
dc.internal.availabilityFull text availableen
dc.statusPeer revieweden
dc.neeo.contributorCostello|John T.|aut|-
dc.description.othersponsorshipEnterprise Irelanden
dc.description.adminti, sp, ab, li - TS 24.04.12en
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