Skip to Main content Skip to Navigation
New interface
Theses

Etude spectroscopique et imagerie rapide d'une plume d'ablation laser obtenue à partir de cibles céramiques d'oxydes complexes (CaCu3Ti4O12 et BaxSr1-xTiO3)

Abstract : From the laser ablation of complex oxide ceramics (CCTO and BSTO), characterisation by time-space resolved spectroscopy and fast imaging are shown in this dissertation. By the measurements, we noticed a similar development of all species of the plasma, for any ionisation degree, in any explored pressure and explored fluence. During the first times after laser impact, plasma is highly non-uniform and moves forward only one dimension. Afterwards, plasma expands uniformly in three dimensions. From collaboration with the LP3 laboratory (Marseille University), we succeeded in estimating plasma parameters (temperature, electronic density, thickness) from fits of experimental spectra with simulated ones. From those fits, we bore out the correlation between plasma non-uniformity and expansion kind. By spectral analysis it was possible to identify and quantify pollutants from targets. Depending on the pollutant, we were able to estimate weak concentrations, as low as few tens ppm.
Complete list of metadata

Cited literature [112 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00951389
Contributor : Jean-François Lagrange Connect in order to contact the contributor
Submitted on : Monday, February 24, 2014 - 4:20:10 PM
Last modification on : Tuesday, January 11, 2022 - 5:56:08 PM
Long-term archiving on: : Saturday, May 24, 2014 - 11:50:17 AM

Identifiers

  • HAL Id : tel-00951389, version 1

Collections

Citation

Jean-François Lagrange. Etude spectroscopique et imagerie rapide d'une plume d'ablation laser obtenue à partir de cibles céramiques d'oxydes complexes (CaCu3Ti4O12 et BaxSr1-xTiO3). Physique des plasmas [physics.plasm-ph]. Université François Rabelais - Tours, 2010. Français. ⟨NNT : ⟩. ⟨tel-00951389⟩

Share

Metrics

Record views

151

Files downloads

210