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Diagnostic du plasma de la source d'ions ECR SIMPA par spectroscopie X, Collision d'ions néon hydrogenoïdes avec des agrégats d'argon

Abstract : The first part of the thesis is devoted to SIMPA ECR ion source caracterization, first, I explored the ion source's capacities on the point of view of extracted currents for three elements, argon, krypton and neon. By analyzing the Bremsstrahlung spectra, I determined the electronic temperature in the plasma and the electronic and ionic densities. In a second time, I recorded high resolution X-spectra of argon and krypton plasma's. By taking into account the principal mechanisms of production of a K hole in the ions inside the plasma, I determined the ionic densities of the high charge states of argon. Lastly, I highlighted a correlation between the ions charge states densities with the intensities of extracted currents.

The second part of the thesis is devoted to Ne9+- argon clusters collisions. First, I presented simple and effective theoretical models allowing to interpret the phenomena occurring during a collision, on the point of view of the projectile. I carried out a simulation for a collision of an ion Ne9+ with an argon cluster of a given size, this to know the energy levels populated during the electronic capture and to follow the number of electrons in each projectile shell. Lastly, I presented the first results of a collision between a Ne9+ beam and argon clusters. These results, have enabled me by using projectile X-ray spectroscopy during the ions-clusters collision, to evidence a strong clustering of targets atoms and to highlight an electronic multicapture in the projectile ion excited states.
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Submitted on : Thursday, October 12, 2006 - 1:01:50 PM
Last modification on : Wednesday, December 9, 2020 - 3:11:28 PM
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  • HAL Id : tel-00105774, version 1

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Nacer Adrouche. Diagnostic du plasma de la source d'ions ECR SIMPA par spectroscopie X, Collision d'ions néon hydrogenoïdes avec des agrégats d'argon. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2006. Français. ⟨tel-00105774⟩

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