Speaker
Description
The Korea Broad acceptance Recoil spectrometer and Apparatus (KoBRA) at the Rare isotope Accelerator complex for ON-line experiments (RAON) was constructed as a spectrometer for low-energy nuclear physics research, covering beam energies from 1 to 40 MeV per nucleon. Beam commissioning was initiated in May 2023 using 40Ar beams on carbon targets, where secondary fragments were identified through measurements of magnetic rigidity, time of flight, and energy loss using parallel plate avalanche counters and silicon detectors at focal planes. In 2024, isotope separation on-line produced 25Na beams were accelerated via the superconducting linear accelerator and successfully separated at KoBRA, demonstrating operational capability with both fragmentation and isotope separation on-line beams. Machine study experiments were conducted to optimize separator performance, and several user experiments commenced in late 2025 for nuclear physics and application research. This presentation summarizes the commissioning results and experimental activities conducted at KoBRA over the three-year period.
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