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Production de faisceaux d'ions radioactifs par la méthode ISOL pour SPIRAL

Abstract : This work is directly related to the SPIRAL project (Système de Production d'Ions Radioactifs Accélérés en Lignes) of which the start up will begin in September 2001 at GANIL (Grand Accélérateur National d'Ions Lourds) in Caen. This thesis primarily concernes the development of radioactive ion production systems (target/ion source) by the thorough study of each production stage of the ISOL (Isotopic Separation On Line) method: target and/or projectile fragmentation production, diffusion out of target material, effusion into the ion source and finally the ionization of the radioactive atoms. A bibliographical research and thermal simulations allowed us to optimize materials and the shape of the production and diffusion targets. A first target was optimized and made reliable for the radioactive noble gase production (argon, neon...). A second target dedicated to the radioactive helium production was entirely designed and realised (from the specifications to the "off line" and "on line" tests). Finally, a third target source system was defined for singly-charged radioactive alkaline production. The intensities of secondary beams planned for SPIRAL are presented here. A detailed study of the diffusion effusion efficiency for these various targets showed that the use of a fine microstructure carbon (grain size of 1µm) improved the diffusion and showed the importance of thickness of the lamella for the short lived isotope effusion.
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Contributor : Michel Lion Connect in order to contact the contributor
Submitted on : Friday, March 25, 2005 - 3:39:55 PM
Last modification on : Wednesday, May 11, 2022 - 4:40:22 AM
Long-term archiving on: : Friday, November 25, 2016 - 9:02:18 AM


  • HAL Id : tel-00008873, version 1



F. Landre-Pellemoine. Production de faisceaux d'ions radioactifs par la méthode ISOL pour SPIRAL. Physique Nucléaire Expérimentale [nucl-ex]. Université de Caen, 2001. Français. ⟨tel-00008873⟩



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