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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 filamentation 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 partly explains the reason for the occurrence of atomic plume during fs LIBS in air compared to long-pulse ns LIBS.

Authors:
; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1267594
Report Number(s):
PNNL-SA-112002
Journal ID: ISSN 1094-4087; DN2001000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 23; Journal Issue: 21; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
Laser ablation; Molecular formation; AlO; Emission spectroscopy; 2D fast imaging

Citation Formats

Harilal, Sivanandan S., Yeak, J., and Phillips, Mark C. Plasma temperature clamping in filamentation laser induced breakdown spectroscopy. United States: N. p., 2015. Web. doi:10.1364/OE.23.027113.
Harilal, Sivanandan S., Yeak, J., & Phillips, Mark C. Plasma temperature clamping in filamentation laser induced breakdown spectroscopy. United States. https://doi.org/10.1364/OE.23.027113
Harilal, Sivanandan S., Yeak, J., and Phillips, Mark C. 2015. "Plasma temperature clamping in filamentation laser induced breakdown spectroscopy". United States. https://doi.org/10.1364/OE.23.027113.
@article{osti_1267594,
title = {Plasma temperature clamping in filamentation laser induced breakdown spectroscopy},
author = {Harilal, Sivanandan S. and Yeak, J. and Phillips, Mark C.},
abstractNote = {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 filamentation 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 partly explains the reason for the occurrence of atomic plume during fs LIBS in air compared to long-pulse ns LIBS.},
doi = {10.1364/OE.23.027113},
url = {https://www.osti.gov/biblio/1267594}, journal = {Optics Express},
issn = {1094-4087},
number = 21,
volume = 23,
place = {United States},
year = {Mon Oct 19 00:00:00 EDT 2015},
month = {Mon Oct 19 00:00:00 EDT 2015}
}