Université Paris Saclay
Simulation and experimental study of the extraction of multicharged ions from an ECR source
The thesis project consists to study, using numerical simulations and in close coordination with experiments, the extraction of multi-charged ion beams from a particle accelerator ion source. The ions are extracted from a magnetized plasma whose electrons are heated by electron cyclotron resonance (ECR). The work will start with the recovery of a self-consistent particle code simulating the equilibrium state of a multi-charged ion source plasma.
The first objective of the thesis is to obtain the particle fluxes at the plasma outlet of the ion source (electron and ion position and velocity distribution function). These data will then be used as input to the existing Particle in Cell (PIC) ONIX (Orsay Negative Ion eXtraction) code, which will be adapted to simulate the extraction of multiply-charged positive ions from the source plasma using a high-voltage electrode system.
The second objective of this thesis will include a phase of experimental measurements on the LPSC’s high-current bench, where the transverse emittances of the ion beams produced by the PHOENIX V2 source will be measured, as well as the energy spectrum of the electrons co-extracted from the plasma.
Finally, a simulation-experiment comparison will refine the simulation model and provide new insights into ECR ion source plasma and beam shaping. This comparison will involve modeling the propagation of the high-energy beam (using codes such as IBSimu or ONAC) and the ion source’s analysis line, made up of a magnetic lens and a dipole.
The SACRE project is led by LPGP Orsay in collaboration with LPSC Grenoble.
To apply for this job please visit esi-archamps.eu.