Charge breeder for the SPIRAL1 upgrade: Preliminary results

Area of Science:

• Nuclear Physics
• Atomic and Molecular Physics
• Accelerator Science

Background:

• The SPIRAL1 facility upgrade at GANIL aims to enhance ion beam production capabilities.
• A LPSC Phoenix Electron Cyclotron Resonance Ion Source (ECRIS) charge breeder, previously tested at ISOLDE, is being integrated.
• Recent advancements in 1+/n+ ion source technology have been incorporated into the charge breeder design.

Purpose of the Study:

• To evaluate the performance of the modified Phoenix ECRIS charge breeder.
• To assess 1+ to n+ conversion efficiencies and transformation times for various elements.
• To qualify the charge breeder for its upcoming installation at the SPIRAL1 facility.

Main Methods:

• Modifications to the charge breeder included 1+ optics, vacuum systems, and RF-buffer gas injection.
• Experiments were conducted at the LPSC test bench to characterize the device.
• Conversion efficiencies and transformation times were measured for noble gases and alkali elements.

Main Results:

• Preliminary results demonstrate the charge breeder's capability for efficient ion conversion.
• Specific conversion efficiencies for noble gases and alkali elements were determined.
• Transformation times were measured, providing crucial operational data.

Conclusions:

• The modified Phoenix ECRIS charge breeder meets performance expectations for SPIRAL1 integration.
• The experimental results validate the implemented technological enhancements.
• The charge breeder is ready for installation and operation within the SPIRAL1 low-energy beam line.