Effect of ionization on laser-induced plume self-similar expansion
| Autor: | Mourad Djebli, Djamila Bennaceur-Doumaz |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Range (particle radiation)
Laser ablation business.industry Chemistry General Physics and Astronomy Surfaces and Interfaces General Chemistry Condensed Matter Physics Laser Fluence Surfaces Coatings and Films Euler equations law.invention Plume Ion symbols.namesake Optics law Ionization symbols Atomic physics business |
| Zdroj: | Applied Surface Science. 255:4595-4599 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2008.11.089 |
| Popis: | The dynamics of a laser ablation plume during the first stage of its expansion, just after the termination of the laser pulse is modelled. The one-dimensional expansion of the evaporated material, considered as an ideal fluid, is governed by one-fluid Euler equations. For high energetic ions, the charge separation can be neglected and the hydrodynamics equations solved using self-similar formulation. Numerical solution is obtained, first when the laser fluence range is low enough to deal with a neutral vapor, and in a second stage, when ionization effects on the expansion are taken into account, for different material targets. As a main result, we found that the presence of ions in the evaporated gas enhances the self-similar expansion. |
| Databáze: | OpenAIRE |
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