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Title: A comparative study of single and double pulse of laser induced breakdown spectroscopy of silver

Abstract

We present a comparative study of the collinear and orthogonal pre-ablation dual pulse configurations of laser induced breakdown spectroscopy (LIBS) of silver using Nd:YAG lasers. The effect of the inter-pulse delay and the ratio of the laser pulse energies on the signal intensity enhancement for both the dual pulse configurations have been investigated. Using the first laser at 532 nm and second laser at 1064 nm delayed by 5 {mu}s, we achieved nearly 2 times signal enhancement in the collinear double-pulsed configuration and nearly 12 times in the pre-ablation orthogonal configuration as compared to SP LIBS. It is ascertained that at the optimized value of the inter-pulse delay between the two lasers, the intensity ratio of the neutral silver lines follows the local thermo dynamical equilibrium (LTE) condition and it is also in excellent agreement with that of the relative transitions probabilities ratio listed in the NIST data base.

Authors:
; ; ;  [1]
  1. Atomic and Molecular Physics Laboratory, Department of Physics, Quaid-i-Azam University, 45320 Islamabad (Pakistan)
Publication Date:
OSTI Identifier:
22046903
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 18; Journal Issue: 7; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; ABLATION; LASER TARGETS; LASER-PRODUCED PLASMA; LTE; NEODYMIUM LASERS; PLASMA DIAGNOSTICS; PROBABILITY; PULSED IRRADIATION; SILVER; SPECTROSCOPY

Citation Formats

Rashid, Babar, Ahmed, Rizwan, Ali, Raheel, and Baig, M. A. A comparative study of single and double pulse of laser induced breakdown spectroscopy of silver. United States: N. p., 2011. Web. doi:10.1063/1.3599591.
Rashid, Babar, Ahmed, Rizwan, Ali, Raheel, & Baig, M. A. A comparative study of single and double pulse of laser induced breakdown spectroscopy of silver. United States. doi:10.1063/1.3599591.
Rashid, Babar, Ahmed, Rizwan, Ali, Raheel, and Baig, M. A. Fri . "A comparative study of single and double pulse of laser induced breakdown spectroscopy of silver". United States. doi:10.1063/1.3599591.
@article{osti_22046903,
title = {A comparative study of single and double pulse of laser induced breakdown spectroscopy of silver},
author = {Rashid, Babar and Ahmed, Rizwan and Ali, Raheel and Baig, M. A.},
abstractNote = {We present a comparative study of the collinear and orthogonal pre-ablation dual pulse configurations of laser induced breakdown spectroscopy (LIBS) of silver using Nd:YAG lasers. The effect of the inter-pulse delay and the ratio of the laser pulse energies on the signal intensity enhancement for both the dual pulse configurations have been investigated. Using the first laser at 532 nm and second laser at 1064 nm delayed by 5 {mu}s, we achieved nearly 2 times signal enhancement in the collinear double-pulsed configuration and nearly 12 times in the pre-ablation orthogonal configuration as compared to SP LIBS. It is ascertained that at the optimized value of the inter-pulse delay between the two lasers, the intensity ratio of the neutral silver lines follows the local thermo dynamical equilibrium (LTE) condition and it is also in excellent agreement with that of the relative transitions probabilities ratio listed in the NIST data base.},
doi = {10.1063/1.3599591},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 7,
volume = 18,
place = {United States},
year = {2011},
month = {7}
}