Title

Thermodynamic and spectroscopic properties of Nd:YAG-CO2 Double-Pulse Laser-induced Iron Plasmas

Authors

Authors

M. Weidman; S. Palanco; M. Baudelet;M. C. Richardson

Abbreviated Journal Title

Spectroc. Acta Pt. B-Atom. Spectr.

Keywords

Laser-induced breakdown spectroscopy; Double pulse LIBS; Laser ablation; Laser heating; Laser-induced particles; INDUCED BREAKDOWN SPECTROSCOPY; ENHANCEMENT; ABLATION; EMISSION; LIBS; Spectroscopy

Abstract

Double-Pulse Laser-Induced Breakdown Spectroscopy of iron using both Nd:YAG and TEA-CO2 lasers has been investigated to better understand mechanisms of signal enhancement. The signal dependence on the delay between the two laser pulses shows an enhanced signal when the CO2 laser pulse interacts with the sample before the Nd:YAG Pulse. Signal kinetics and a simple model of sample heating by the CO2 pulse show that the enhancement during the first 700 ns is due primarily to sample heating. Images of the sample Surface after ablation as well as time-integrated pictures of the plasma suggest that particles are ejected from the surface during the first microseconds after the arrival of the CO2 Pulse and provide fuel for the Subsequent plasma created by the Nd:YAG laser. (C) 2009 Elsevier B.V. All rights reserved.

Journal Title

Spectrochimica Acta Part B-Atomic Spectroscopy

Volume

64

Issue/Number

10

Publication Date

1-1-2009

Document Type

Article; Proceedings Paper

Language

English

First Page

961

Last Page

967

WOS Identifier

WOS:000271546700005

ISSN

0584-8547

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