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Title: Standoff analysis of laser-produced plasmas using laser-induced fluorescence

Abstract

We report the use of laser-induced fluorescence (LIF) of laser ablation plumes for standoff applications. The standoff analysis of Al species, as major and minor species in samples, is performed in a nanosecond laser-produced plasma created at a distance ~10 m. The LIF analysis is performed by resonantly exciting an Al transition at 394.4 nm using a continuous wave (cw) tunable laser and by collecting the direct-line fluorescence signal at 396.15 nm. The spectral resolution of LIF is obtained by scanning the cw tunable LIF laser across the selected Al transition. Our results highlight that LIF provides enhanced signal intensity, emission persistence, and spectral resolution when compared to thermally-excited emission, and these are crucial considerations for using laser-produced plasma for standoff isotopic analysis.

Authors:
ORCiD logo; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1438987
Report Number(s):
PNNL-SA-130891
Journal ID: ISSN 0146-9592; OPLEDP; DN2001000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Optics Letters
Additional Journal Information:
Journal Volume: 43; Journal Issue: 5; Journal ID: ISSN 0146-9592
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
(140.3440) Laser-induced breakdown; (280.4788) Optical Sensing; (280.5395) Plasma Diagnostics; (300.2140) Emission Spectroscopy; (300.2530) Fluorescence

Citation Formats

Harilal, S. S., Brumfield, B. E., and Phillips, M. C. Standoff analysis of laser-produced plasmas using laser-induced fluorescence. United States: N. p., 2018. Web. doi:10.1364/OL.43.001055.
Harilal, S. S., Brumfield, B. E., & Phillips, M. C. Standoff analysis of laser-produced plasmas using laser-induced fluorescence. United States. doi:10.1364/OL.43.001055.
Harilal, S. S., Brumfield, B. E., and Phillips, M. C. Mon . "Standoff analysis of laser-produced plasmas using laser-induced fluorescence". United States. doi:10.1364/OL.43.001055.
@article{osti_1438987,
title = {Standoff analysis of laser-produced plasmas using laser-induced fluorescence},
author = {Harilal, S. S. and Brumfield, B. E. and Phillips, M. C.},
abstractNote = {We report the use of laser-induced fluorescence (LIF) of laser ablation plumes for standoff applications. The standoff analysis of Al species, as major and minor species in samples, is performed in a nanosecond laser-produced plasma created at a distance ~10 m. The LIF analysis is performed by resonantly exciting an Al transition at 394.4 nm using a continuous wave (cw) tunable laser and by collecting the direct-line fluorescence signal at 396.15 nm. The spectral resolution of LIF is obtained by scanning the cw tunable LIF laser across the selected Al transition. Our results highlight that LIF provides enhanced signal intensity, emission persistence, and spectral resolution when compared to thermally-excited emission, and these are crucial considerations for using laser-produced plasma for standoff isotopic analysis.},
doi = {10.1364/OL.43.001055},
journal = {Optics Letters},
issn = {0146-9592},
number = 5,
volume = 43,
place = {United States},
year = {2018},
month = {1}
}