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Étude de plasmas générés par laser, soumis à des champs magnétique et électrique. Utilisation possible en techniques de dépôts.

Abstract : The properties of laser generated plasmas have been studied. In the considered experimental conditions and for all studied elements (Al, Cu, Fe, Mo, Pt), the majority of the evaporated species are ions, with typical energies in the range 60 eV - 100 eV. Due to excitation and recombination mechanisms, the adiabatic constant which governs expansion (temperature, angular distribution) is around 1.2, less than the value 5/3 expected for a monoatomic gas. Strong plasma confinement is obtained under a magnetic field, B, of up to 5 T. The initial plasma temperature then deduced is of the order of 100000 K. To first order, the ion energy distribution is not affected by the field. Due to the high plasma density resulting from confinement, recombination effects are significant. An original approach for the preparation of directly structured materials has been proposed which associates the effects of magnetic and electric fields on plasmas.
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https://tel.archives-ouvertes.fr/tel-00003440
Contributor : Clarisse Ducruet <>
Submitted on : Tuesday, September 30, 2003 - 5:41:11 PM
Last modification on : Friday, December 18, 2020 - 1:22:02 PM
Long-term archiving on: : Friday, April 2, 2010 - 6:58:42 PM

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  • HAL Id : tel-00003440, version 1

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UJF | CNRS

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Clarisse Ducruet. Étude de plasmas générés par laser, soumis à des champs magnétique et électrique. Utilisation possible en techniques de dépôts.. Physique Atomique [physics.atom-ph]. Université Joseph-Fourier - Grenoble I, 2003. Français. ⟨tel-00003440⟩

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