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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7561
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dc.contributor.authorThomas, Jinto-
dc.contributor.authorJoshi, Hem Chandra-
dc.contributor.authorKumar, Ajai-
dc.contributor.authorPhilip, Reji-
dc.date.accessioned2020-10-28T09:37:15Z-
dc.date.available2020-10-28T09:37:15Z-
dc.date.issued2020-10-
dc.identifier.citationPhysical Review E, 2020, Vol. 102, Article No.043205en_US
dc.identifier.issn2470-0045-
dc.identifier.issn2470-0053 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/7561-
dc.descriptionOpen Accessen_US
dc.description.abstractIn this article we report acceleration observed for the ions produced in a 50-nm-thick nickel film coated on a quartz substrate, under nanosecond laser ablation, in the rear ablation geometry. A detailed study with varying background pressure and laser energy is done. Spectroscopic study including spectroscopic time of flight (STOF) measurements of ionic and other neutral transitions from the plasma has been undertaken. The STOF spectra recorded for ionic transition clearly show an enhancement in the velocity of the slow component as the background pressure increases. In addition, a large asymmetric spectral broadening in the 712.22-nm neutral line is observed, which increases with background pressure. While these observations have similarity to some of the reported studies on the acceleration of ionic species through double-layer formation, the electric fields calculated from the measured acceleration appear to be anomalously higher, and a double-layer concept seems to be inadequate.Moreover, the large asymmetry observed in the neutral line profile is indicative of microelectric fields present inside the laser produced plasma plume, which may play a role in the continuous acceleration of the ions. Interestingly, this asymmetry in spectral broadening exhibits temporal and spatial dependence, which indicates that significant electric field is present in the plasma plume even for longer duration and larger distance from the target. These spectroscopic observations of acceleration have also been complemented by triple Langmuir probe measurements. To the best of our information, such observations regarding large ion acceleration for the rather low laser intensities as used in this experiment have not been reported in literature so far.en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttps://journals.aps.org/pre/recenten_US
dc.relation.urihttps://doi.org/10.1103/PhysRevE.102.043205en_US
dc.relation.urihttps://arxiv.org/abs/1910.01846en_US
dc.rights2020 American Physical Societyen_US
dc.titleObservation of ion acceleration in nanosecond laser generated plasma on a nickel thin film under rear ablation geometryen_US
dc.typeArticleen_US
dc.additionalOpen Accessen_US
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