Speaker
Description
RAON is a heavy-ion accelerator facility in Korea that uniquely combines ISOL (Isotope Separation On-Line) and In-Flight (IF) techniques to produce a wide range of Rare Isotope (RI) beams. In the ISOL system, ion sources are continuously being developed to expand RI beam production capabilities. Among them, the Forced Electron Beam Induced Arc Discharge (FEBIAD) ion source is a promising candidate for efficient RI beam generation.
A prototype FEBIAD ion source was evaluated at the offline facility, where successful Ar, Kr, and Xe isotope beam extraction demonstrated its operational feasibility. Since the FEBIAD ion source operates at elevated temperatures, structural deformation due to thermal expansion can occur. In particular, bending and variations in the gap between the anode grid and cathode have been identified as critical issues.
To mitigate these effects, a new FEBIAD ion source design was developed and fabricated to ensure structural stability under high-temperature conditions by adding a heating strip and allowing the body to slide. The fabricated ion source successfully achieved Kr isotope beam separation in offline tests, and subsequent online experiments confirmed stable operation of the source under ISOL conditions, demonstrating its suitability for reliable RI beam production. Future work will involve RI beam extraction experiments using various targets within the RAON ISOL system.
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