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Theses

Contributions à l'étude de la production de faisceaux d'ions radioactifs par la méthode ISOL

Abstract : This thesis is related to the R&D program for the production of radioactive ion beams by the ISOL method at GANIL in Caen. This work concerns several different techniques based on the ISOL method. The first one is the production of radioactive ion beams with a SPIRAL target-source system (target + ECR source). The production rates of radioactive neon beams were determined on the SIRa test bench and previsions for SPIRAL were established. The feasibility of the production of radioactive condensable element beams with such target-source system, with using a transport under a volatile molecular form between the target and the source, was experimentally proven by the production of radioactive oxygen beams via the CO molecule. The second technique is the production of radioactive alkaline beams with the target-source system MONOLITHE (target + hot cavity source). The production efficiencies of lithium and sodium radioactive beams were determined. A new methodology, the « global method », has been developed as part of this thesis, for deducing diffusion, effusion and ionisation properties of these two elements with this ensemble. It is shown that the evolution of diffusion properties between different alkali elements is similar to noble gases. The third one is the IGISOL technique (target + ion guide). The MI-GI-CHEMIN code was created for simulating the movement of ions in an ion guide filled with helium and a given concentration of impurities, including electric and magnetic fields. A first IGISOL prototype is in realisation at GANIL.
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https://tel.archives-ouvertes.fr/tel-00002930
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Submitted on : Tuesday, June 3, 2003 - 8:30:12 AM
Last modification on : Thursday, February 1, 2018 - 1:34:10 AM
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Stéphane Gibouin. Contributions à l'étude de la production de faisceaux d'ions radioactifs par la méthode ISOL. Physique Nucléaire Expérimentale [nucl-ex]. Université de Caen, 2003. Français. ⟨tel-00002930⟩

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