The formation of ring shaped laser plasmas on a metal surface

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dc.contributor.authorVeloso, Felipe
dc.contributor.authorChuaqui, Hernan
dc.contributor.authorAliaga Rossel, Raul
dc.contributor.authorFavre, Mario
dc.contributor.authorMitchell, Ian
dc.contributor.authorWyndham, Edmund
dc.contributor.authorHerreraVelazquez, JJE
dc.date.accessioned2024-01-10T14:24:13Z
dc.date.available2024-01-10T14:24:13Z
dc.date.issued2006
dc.description.abstractA method to produce ring plasmas on a metal surface is presented. The ring plasma is produced by focusing a laser pulse into an annular shape. This is achieved by using a combination of a converging lens and an axicon. The axicon is a rotationally symmetric prism. The radius of the focused ring is determined by the base angle of the axicon, and the focal length of the converging lens. The experiments are performed on a titanium surface, using a 0.18 J, 10 ns, 1064 nm pulsed, from a Nd:YAG laser. The background gas is hydrogen, at pressures in the atmospheric range. The ring structure was measured using schlieren imaging and Mach Zehnder interferometry. The expansion velocities of the laser-produced plasma in the background gas were measured in two directions; parallel and perpendicular to the metallic surface. Characteristic values are 5-9(.)10(3) m/s, for the ring radius expansion, parallel to the surface, and 1.0-1.7(.)10(4) m/s, perpendicular to the surface. Characteristic electron densities of the order of 10(18) cm(-3) were measured, with hollow radial profiles. The temperature of the plasma was estimated to be between 0.1 and 0.4 eV. This ring plasma is used as precursor plasma to achieve a hollow gas embedded z-pinch.
dc.description.funderFONDECYT
dc.description.funderMECESUP
dc.format.extent2 páginas
dc.fuente.origenWOS
dc.identifier.isbn978-0-7354-0375-8
dc.identifier.issn0094-243X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/80199
dc.identifier.wosidWOS:000244439700097
dc.information.autorucFacultad de Física; Veloso Espinosa, Felipe; S/I; 14943
dc.language.isoen
dc.nota.accesoSin adjunto
dc.publisherAMER INST PHYSICS
dc.relation.ispartof11th Latin American Workshop on Plasma Physics, DEC 05-09, 2006, Mexico City, MEXICO
dc.rightsregistro bibliográfico
dc.subjectaxicon
dc.subjectlaser-produced plasma
dc.subjectFUSION
dc.subject.ods07 Affordable and Clean Energy
dc.subject.odspa07 Energía asequible y no contaminante
dc.titleThe formation of ring shaped laser plasmas on a metal surface
dc.typecomunicación de congreso
dc.volumen875
sipa.codpersvinculados14943
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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