Expansion dynamics and chemistry evolution in ultrafast laser filament produced plasmas

Elizabeth J. Kautz; Jeremy Yeak; Bruce E. Bernacki; Mark C. Phillips; Sivanandan S. Harilal

doi:10.1039/d0cp00078g

Expansion dynamics and chemistry evolution in ultrafast laser filament produced plasmas

Elizabeth J. Kautz, Jeremy Yeak, Bruce E. Bernacki, Mark C. Phillips, Sivanandan S. Harilal

Optical Sciences

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Laser ablation in conjunction with optical emission spectroscopy is a potential non-contact, stand-off detection method for all elements in the periodic table and certain isotopes such as radionuclides. Currently, significant development efforts are on-going to use ultrafast laser filaments for remote detection of materials. The application of filaments is of particular interest in extending the range of stand-off capability associated with elemental and isotopic detectionvialaser-induced breakdown spectroscopy. In this study, we characterize the expansion dynamics and chemical evolution of filament-produced uranium (U) plasmas. Laser filaments are generated in the laboratory by loosely focusing 35 femtosecond (fs), 6 milli Joule (mJ) pulses in air. Time-resolved, two-dimensional plume and spectral imaging was performed to study hydrodynamics and evolution of U atomic and UO molecular emission in filament-produced U plasmas. Our results highlight that filament ablation of U plasmas gives a cylindrical plume morphology with an appearance of plume splitting into slow and fast moving components at later times of its evolution. Emission from the slow-moving component shows no distinct spectral features (i.e.broadband-like) and is contributed in part by nanoparticles generated during ultrafast laser ablation. Additionally, we find U atoms and U oxide molecules (i.e.UO, U_xO_y) co-exist in the filament produced plasma, which can be attributed to the generation of low-temperature plasma conditions during filament ablation.

Original language	English (US)
Pages (from-to)	8304-8314
Number of pages	11
Journal	Physical Chemistry Chemical Physics
Volume	22
Issue number	16
DOIs	https://doi.org/10.1039/d0cp00078g
State	Published - Apr 28 2020

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1039/d0cp00078g

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title = "Expansion dynamics and chemistry evolution in ultrafast laser filament produced plasmas",

abstract = "Laser ablation in conjunction with optical emission spectroscopy is a potential non-contact, stand-off detection method for all elements in the periodic table and certain isotopes such as radionuclides. Currently, significant development efforts are on-going to use ultrafast laser filaments for remote detection of materials. The application of filaments is of particular interest in extending the range of stand-off capability associated with elemental and isotopic detectionvialaser-induced breakdown spectroscopy. In this study, we characterize the expansion dynamics and chemical evolution of filament-produced uranium (U) plasmas. Laser filaments are generated in the laboratory by loosely focusing 35 femtosecond (fs), 6 milli Joule (mJ) pulses in air. Time-resolved, two-dimensional plume and spectral imaging was performed to study hydrodynamics and evolution of U atomic and UO molecular emission in filament-produced U plasmas. Our results highlight that filament ablation of U plasmas gives a cylindrical plume morphology with an appearance of plume splitting into slow and fast moving components at later times of its evolution. Emission from the slow-moving component shows no distinct spectral features (i.e.broadband-like) and is contributed in part by nanoparticles generated during ultrafast laser ablation. Additionally, we find U atoms and U oxide molecules (i.e.UO, UxOy) co-exist in the filament produced plasma, which can be attributed to the generation of low-temperature plasma conditions during filament ablation.",

author = "Kautz, {Elizabeth J.} and Jeremy Yeak and Bernacki, {Bruce E.} and Phillips, {Mark C.} and Harilal, {Sivanandan S.}",

note = "Funding Information: The authors acknowledge the U.S. Department of Energy/NNSA Office of Defense Nuclear Nonproliferation for financial support. The work presented here was performed at Pacific Northwest National Laboratory, which is operated for the U.S. DOE by Battelle Memorial Institute under Contract No. DE-AC05-76RLO1830. Funding Information: The authors acknowledge the U.S. Department of Energy/NNSA Office of Defense Nuclear Nonproliferation for financial support. The work presented here was performed at Pacific North-west National Laboratory, which is operated for the U.S. DOE by Battelle Memorial Institute under Contract No. DE-AC05-76RLO1830. Publisher Copyright: {\textcopyright} the Owner Societies 2020.",

year = "2020",

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doi = "10.1039/d0cp00078g",

language = "English (US)",

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publisher = "Royal Society of Chemistry",

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T1 - Expansion dynamics and chemistry evolution in ultrafast laser filament produced plasmas

AU - Kautz, Elizabeth J.

AU - Yeak, Jeremy

AU - Bernacki, Bruce E.

AU - Phillips, Mark C.

AU - Harilal, Sivanandan S.

N1 - Funding Information: The authors acknowledge the U.S. Department of Energy/NNSA Office of Defense Nuclear Nonproliferation for financial support. The work presented here was performed at Pacific Northwest National Laboratory, which is operated for the U.S. DOE by Battelle Memorial Institute under Contract No. DE-AC05-76RLO1830. Funding Information: The authors acknowledge the U.S. Department of Energy/NNSA Office of Defense Nuclear Nonproliferation for financial support. The work presented here was performed at Pacific North-west National Laboratory, which is operated for the U.S. DOE by Battelle Memorial Institute under Contract No. DE-AC05-76RLO1830. Publisher Copyright: © the Owner Societies 2020.

PY - 2020/4/28

Y1 - 2020/4/28

N2 - Laser ablation in conjunction with optical emission spectroscopy is a potential non-contact, stand-off detection method for all elements in the periodic table and certain isotopes such as radionuclides. Currently, significant development efforts are on-going to use ultrafast laser filaments for remote detection of materials. The application of filaments is of particular interest in extending the range of stand-off capability associated with elemental and isotopic detectionvialaser-induced breakdown spectroscopy. In this study, we characterize the expansion dynamics and chemical evolution of filament-produced uranium (U) plasmas. Laser filaments are generated in the laboratory by loosely focusing 35 femtosecond (fs), 6 milli Joule (mJ) pulses in air. Time-resolved, two-dimensional plume and spectral imaging was performed to study hydrodynamics and evolution of U atomic and UO molecular emission in filament-produced U plasmas. Our results highlight that filament ablation of U plasmas gives a cylindrical plume morphology with an appearance of plume splitting into slow and fast moving components at later times of its evolution. Emission from the slow-moving component shows no distinct spectral features (i.e.broadband-like) and is contributed in part by nanoparticles generated during ultrafast laser ablation. Additionally, we find U atoms and U oxide molecules (i.e.UO, UxOy) co-exist in the filament produced plasma, which can be attributed to the generation of low-temperature plasma conditions during filament ablation.

AB - Laser ablation in conjunction with optical emission spectroscopy is a potential non-contact, stand-off detection method for all elements in the periodic table and certain isotopes such as radionuclides. Currently, significant development efforts are on-going to use ultrafast laser filaments for remote detection of materials. The application of filaments is of particular interest in extending the range of stand-off capability associated with elemental and isotopic detectionvialaser-induced breakdown spectroscopy. In this study, we characterize the expansion dynamics and chemical evolution of filament-produced uranium (U) plasmas. Laser filaments are generated in the laboratory by loosely focusing 35 femtosecond (fs), 6 milli Joule (mJ) pulses in air. Time-resolved, two-dimensional plume and spectral imaging was performed to study hydrodynamics and evolution of U atomic and UO molecular emission in filament-produced U plasmas. Our results highlight that filament ablation of U plasmas gives a cylindrical plume morphology with an appearance of plume splitting into slow and fast moving components at later times of its evolution. Emission from the slow-moving component shows no distinct spectral features (i.e.broadband-like) and is contributed in part by nanoparticles generated during ultrafast laser ablation. Additionally, we find U atoms and U oxide molecules (i.e.UO, UxOy) co-exist in the filament produced plasma, which can be attributed to the generation of low-temperature plasma conditions during filament ablation.

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DO - 10.1039/d0cp00078g

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JF - Physical Chemistry Chemical Physics

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ER -

Expansion dynamics and chemistry evolution in ultrafast laser filament produced plasmas

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