Ion beam emittance from an ECRIS

Area of Science:

• Plasma Physics
• Particle Accelerator Technology
• Computational Physics

Background:

• Ion beam extraction from Electron Cyclotron Resonance Ion Sources (ECRIS) presents a 3D simulation challenge, despite geometric symmetry.
• Strong magnetic fields in ECRIS magnetize electrons and significantly reduce ion Larmor radii relative to plasma chamber dimensions.
• Particle tracking simulations are feasible assuming minimal collisional influence on particle trajectories.

Purpose of the Study:

• To simulate ion beam extraction from an ECRIS.
• To investigate the impact of varying electron energies on the extracted ion beam.
• To validate simulation methods against historical experimental data.

Main Methods:

• Generated initial ion coordinates by simulating stochastic electron acceleration via 14.5 GHz radio frequency power.
• Performed particle tracking through the plasma using generated initial conditions.
• Developed methods for analyzing 2D cuts of 6D phase space, currently achieving full 4D analysis.

Main Results:

• Successfully reproduced experimental beam profile results from a decade prior.
• Demonstrated the influence of different electron energies on the extracted ion beam characteristics.
• Established methods for detailed phase space analysis of extracted beams.

Conclusions:

• The simulation approach accurately models ion beam extraction from ECRIS.
• Electron energy is a critical parameter influencing extracted beam properties.
• Ongoing work extends the analysis to higher dimensions (5D and 6D) for more comprehensive understanding.