Spatial characterization of laser-induced plasmas by deconvolution of spatially resolved spectra
- 20 October 2003
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 42 (30), 5938-5946
- https://doi.org/10.1364/ao.42.005938
Abstract
The spatial characterization of laser-induced plasmas, including their temperature, electron density, and relative atom density, has been carried out by emission spectroscopy. The plasmas were generated with iron samples in air and argon at atmospheric pressure. An imaging spectrometer equipped with an intensified CCD detector procured spectra with spatial resolution. The plasma characterization was made at three temporal gates (2–3, 5–6, and 9–11 µs) to permit the plasma’s evolution to be studied. A deconvolution procedure was developed to transform the measured intensity, integrated along the line of sight, into the radial distribution of emissivity. Temperature and electron density distributions were obtained under the assumption of local thermodynamic equilibrium and Stark broadening of the emission lines. The relative atom density distributions in the plasma of the Fe atoms arising from the sample and of the Ar atoms arising from the ambient gas were determined and evidenced an important interaction between the plasma and the surrounding atmosphere.Keywords
This publication has 21 references indexed in Scilit:
- Shadowgraphic and emission imaging spectroscopic studies of the laser ablation of graphite in an Ar gas atmosphereApplied Physics A, 1999
- Space- and time-resolved measurements of temperatures and electron densities of plasmas formed during laser ablation of metallic samplesApplied Physics A, 1999
- Novel and Recent Applications of Elemental Determination by Laser-Induced Breakdown SpectrometryAnalytical Letters, 1999
- Temporal and Spatial Behavior of Electron Density and Temperature in a Laser-Produced Plasma from YBa2Cu3O7Applied Spectroscopy, 1998
- Fundamentals and Applications of Laser-Induced Breakdown SpectroscopyCritical Reviews in Analytical Chemistry, 1997
- Level populations in a laser-induced plasma on a lead targetSpectrochimica Acta Part B: Atomic Spectroscopy, 1997
- Applications of Laser-Induced Breakdown SpectrometryApplied Spectroscopy Reviews, 1997
- Spatially and temporally resolved emission intensities and number densities in low temperature laser-induced plasmas in vacuum and in ambient gasesApplied Surface Science, 1996
- Interaction of a Laser Beam with Metals. Part II: Space-Resolved Studies of Laser-Ablated Plasma EmissionApplied Spectroscopy, 1992
- Electron Temperature and Density Profiles of Excimer Laser-Induced PlasmasApplied Spectroscopy, 1990