Étude expérimentale et simulation des conditions d'extraction d'un faisceau d'ions multichargés d'une source à résonance cyclotronique électronique

Abstract : This thesis concerns the beam extraction studies of ECR Ion Sources for the SPIRAL project at GANIL (France). The optical properties (i.e. the emittances) of the radioactive ion beam production source is a crucial point in this project. We performed emittance measurements with a very high transport efficiency and developed a computer code for simulating the extraction and transport conditions. This simulation takes into account all the parameters acting on the extraction process: the characteristics of the ions and electrons emitted by the plasma, their space and energy distributions, the space charge, the magnetic filed of the source and the accelerating electric field. We explained the evolution of the emittances for two different types of ECR Ion Source. The simulation-experiment comparison showed us that the magnetic field and the intrinsic energy of the ions seem to be the most important parameters for explaining the overall emittance behaviour of the ECRIS. We precise their values and comment them.
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J. Mandin. Étude expérimentale et simulation des conditions d'extraction d'un faisceau d'ions multichargés d'une source à résonance cyclotronique électronique. Physique des accélérateurs [physics.acc-ph]. Université de Caen, 1996. Français. ⟨in2p3-00008706⟩

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