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dc.contributor.authorHarilal, S. S.
dc.contributor.authorKautz, E. J.
dc.contributor.authorPhillips, M. C.
dc.date.accessioned2022-03-18T23:10:32Z
dc.date.available2022-03-18T23:10:32Z
dc.date.issued2022-02-14
dc.identifier.citationHarilal, S. S., Kautz, E. J., & Phillips, M. C. (2022). Spatiotemporal evolution of emission and absorption signatures in a laser-produced plasma. Journal of Applied Physics.en_US
dc.identifier.issn0021-8979
dc.identifier.doi10.1063/5.0081597
dc.identifier.urihttp://hdl.handle.net/10150/663682
dc.description.abstractWe report spatiotemporal evolution of emission and absorption signatures of Al species in a nanosecond (ns) laser-produced plasma (LPP). The plasmas were generated from an Inconel target, which contained ∼ 0.4 wt. % Al, using 1064 nm, ≈ 6 ns full width half maximum pulses from an Nd:YAG laser at an Ar cover gas pressure of ≈ 34 Torr. The temporal distributions of the Al I (394.4 nm) transition were collected from various spatial points within the plasma employing time-of-flight (TOF) emission and laser absorption spectroscopy, and they provide kinetics of the excited state and ground state population of the selected transition. The emission and absorption signatures showed multiple peaks in their temporal profiles, although they appeared at different spatial locations and times after the plasma onset. The absorption temporal profiles showed an early time signature representing shock wave propagation into the ambient gas. We also used emission and absorption spectral features for measuring various physical properties of the plasma. The absorption spectral profiles are utilized for measuring linewidths, column density, and kinetic temperature, while emission spectra were used to measure excitation temperature. A comparison between excitation and kinetic temperature was made at various spatial points in the plasma. Our results highlight that the TOF measurements provide a resourceful tool for showing the spatiotemporal LPP dynamics with higher spatial and temporal resolution than is possible with spectral measurements but are difficult to interpret without additional information on excitation temperatures and linewidths. The combination of absorption and emission TOF and spectral measurements thus provides a more complete picture of LPP spatiotemporal dynamics than is possible using any one technique alone.en_US
dc.description.sponsorshipDefense Threat Reduction Agencyen_US
dc.language.isoenen_US
dc.publisherAIP Publishingen_US
dc.rights© 2022 Author(s).en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en_US
dc.titleSpatiotemporal evolution of emission and absorption signatures in a laser-produced plasmaen_US
dc.typeArticleen_US
dc.identifier.eissn1089-7550
dc.contributor.departmentJames C. Wyant College of Optical Sciences, University of Arizonaen_US
dc.identifier.journalJournal of Applied Physicsen_US
dc.description.note12 month embargo; published online: 09 February 2022en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.identifier.pii10.1063/5.0081597
dc.source.journaltitleJournal of Applied Physics
dc.source.volume131
dc.source.issue6
dc.source.beginpage063101


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