Plasma temperature clamping in filamentation laser induced breakdown spectroscopy

S. S. Harilal; J. Yeak; M. C. Phillips

doi:10.1364/OE.23.027113

Plasma temperature clamping in filamentation laser induced breakdown spectroscopy

S. S. Harilal, J. Yeak, M. C. Phillips

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

39 Scopus citations

Abstract

Ultrafast laser filament induced breakdown spectroscopy is a very promising method for remote material detection. We present characteristics of plasmas generated in a metal target by laser filaments in air. Our measurements show that the temperature of the ablation plasma is clamped along the filament channel due to intensity clamping in a filament. Nevertheless, significant changes in radiation intensity are noticeable, and this is essentially due to variation in the number density of emitting atoms. The present results also explain the near absence of ion emission but strong atomic neutral emission from plumes produced during fs LIBS in air.

Original language	English (US)
Pages (from-to)	27113-27122
Number of pages	10
Journal	Optics Express
Volume	23
Issue number	21
DOIs	https://doi.org/10.1364/OE.23.027113
State	Published - Oct 19 2015
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Plasma temperature clamping in filamentation laser induced breakdown spectroscopy",

abstract = "Ultrafast laser filament induced breakdown spectroscopy is a very promising method for remote material detection. We present characteristics of plasmas generated in a metal target by laser filaments in air. Our measurements show that the temperature of the ablation plasma is clamped along the filament channel due to intensity clamping in a filament. Nevertheless, significant changes in radiation intensity are noticeable, and this is essentially due to variation in the number density of emitting atoms. The present results also explain the near absence of ion emission but strong atomic neutral emission from plumes produced during fs LIBS in air.",

author = "Harilal, {S. S.} and J. Yeak and Phillips, {M. C.}",

note = "Funding Information: This work was supported by the DOE/NNSA Office of Nonproli feration and Verification Research and Development (NA-22). Pacific Northwest National Laboratory, a multi-program national laboratory operated by Battelle for the U.S. Department of Energy under Contract DE-AC05-76RL01830. The authors thank to Dr. Burt Beardsley for technical help as well as lending Echelle spectrograph and Dr. Bret D. Cannon for valuable discussions while preparing the manuscript. Publisher Copyright: {\textcopyright} 2015 Optical Society of America.",

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doi = "10.1364/OE.23.027113",

language = "English (US)",

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journal = "Optics Express",

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T1 - Plasma temperature clamping in filamentation laser induced breakdown spectroscopy

AU - Harilal, S. S.

AU - Yeak, J.

AU - Phillips, M. C.

N1 - Funding Information: This work was supported by the DOE/NNSA Office of Nonproli feration and Verification Research and Development (NA-22). Pacific Northwest National Laboratory, a multi-program national laboratory operated by Battelle for the U.S. Department of Energy under Contract DE-AC05-76RL01830. The authors thank to Dr. Burt Beardsley for technical help as well as lending Echelle spectrograph and Dr. Bret D. Cannon for valuable discussions while preparing the manuscript. Publisher Copyright: © 2015 Optical Society of America.

PY - 2015/10/19

Y1 - 2015/10/19

N2 - Ultrafast laser filament induced breakdown spectroscopy is a very promising method for remote material detection. We present characteristics of plasmas generated in a metal target by laser filaments in air. Our measurements show that the temperature of the ablation plasma is clamped along the filament channel due to intensity clamping in a filament. Nevertheless, significant changes in radiation intensity are noticeable, and this is essentially due to variation in the number density of emitting atoms. The present results also explain the near absence of ion emission but strong atomic neutral emission from plumes produced during fs LIBS in air.

AB - Ultrafast laser filament induced breakdown spectroscopy is a very promising method for remote material detection. We present characteristics of plasmas generated in a metal target by laser filaments in air. Our measurements show that the temperature of the ablation plasma is clamped along the filament channel due to intensity clamping in a filament. Nevertheless, significant changes in radiation intensity are noticeable, and this is essentially due to variation in the number density of emitting atoms. The present results also explain the near absence of ion emission but strong atomic neutral emission from plumes produced during fs LIBS in air.

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ER -

Plasma temperature clamping in filamentation laser induced breakdown spectroscopy

Abstract

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