Charge resolved electrostatic diagnostic of colliding copper laser plasma plumes

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dc.contributor.author Yeates, P
dc.contributor.author Fallon, Conor
dc.contributor.author Kennedy, E.T.
dc.contributor.author Costello, John T.
dc.date.accessioned 2012-05-15T16:03:53Z
dc.date.available 2012-05-15T16:03:53Z
dc.date.copyright 2011 American Institute of Physics en
dc.date.issued 2011
dc.identifier.citation Physics of Plasmas en
dc.identifier.issn 1070-664X
dc.identifier.uri http://hdl.handle.net/10197/3614
dc.description.abstract The 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.sponsorship Science Foundation Ireland en
dc.description.sponsorship Higher Education Authority en
dc.description.sponsorship Other funder en
dc.format.extent 732151 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher American Institute of Physics en
dc.rights The following article appeared in Physics of Plasmas 18, 103104 (2011), DOI:10.1063/1.3633486 and may be found at http://dx.doi.org/10.1063/1.3633486. 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.subject Copper colliding plasma en
dc.subject Diagnostic en
dc.subject Faraday cup en
dc.subject Gridded retarding field analyzer en
dc.subject Charge resolved en
dc.subject Charge yield en
dc.subject Energy compression en
dc.subject.lcsh Laser plasmas en
dc.subject.lcsh Electrostatics en
dc.subject.lcsh Linear accelerators en
dc.title Charge resolved electrostatic diagnostic of colliding copper laser plasma plumes en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.status Peer reviewed en
dc.identifier.volume 18 en
dc.identifier.issue 10 en
dc.identifier.startpage 103104-1 en
dc.identifier.endpage 103114-10 en
dc.identifier.doi 10.1063/1.3633486
dc.neeo.contributor Yeates|P|aut| en
dc.neeo.contributor Fallon|Conor|aut| en
dc.neeo.contributor Kennedy|E.T.|aut| en
dc.neeo.contributor Costello|John T.|aut| en
dc.description.othersponsorship Enterprise Ireland en
dc.description.admin ti, sp, ab, li - TS 24.04.12 en


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