Electron cyclotron resonance 140 mA D(+) beam extraction optimization for IFMIF EVEDA accelerator.

Area of Science:

• Nuclear Fusion Engineering
• Accelerator Physics
• Plasma Physics

Background:

• The SILHI electron cyclotron resonance (ECR) ion source routinely produces a 100-120 mA H(+) beam for the IPHI accelerator.
• The International Fusion Materials Irradiation Facility (IFMIF) requires a 140 mA continuous wave (cw) deuteron source for simulating fusion reactor neutron environments.

Purpose of the Study:

• Design and realize a high-current cw deuteron source for the IFMIF project.
• Investigate a new extraction system for the ECR ion source to achieve high current extraction with low beam divergence and emittance.

Main Methods:

• Leveraging experience from the SILHI ECR ion source.
• Studying different electrode configurations (five-, four-, and three-electrode systems) for the extraction system.
• Comparing extracted beam characteristics and electric field conditions.

Main Results:

• Experimental results from the SILHI source with H(+) ions are discussed.
• Extensive experimental results on the BETSI test bench are anticipated upon completion of the dedicated extraction system.

Conclusions:

• The development of a new extraction system is crucial for meeting IFMIF's deuteron beam requirements.
• Optimizing the ECR ion source extraction system is key to achieving high-current, low-emittance deuteron beams for fusion materials research.