Speaker
Description
RAON (Rare isotope Accelerator complex for ON-line experiments) [1-3] is a heavy-ion accelerator facility in South Korea designed to provide both stable and rare isotope (RI) beams. The ISOL (Isotope Separation On-Line) system produces rare isotopes using a 70 MeV proton beam from the cyclotron incident on a production target. The extracted RI beams, with energies of several tens of keV, are delivered to the CLaSsy [4] and MRTOF-MS [5] for low-energy precision experiments. CLaSsy recently completed its first on‑line spectroscopy measurements using $^{22–24}$Na RI beams, establishing a practical foundation for performing high‑precision laser spectroscopy of unstable nuclei [6]. RAON also includes the superconducting linear accelerator (SCL3), which accepts beams from either the ECR ion source (ECR-IS) or the ISOL system and accelerates them up to several tens of MeV per nucleon. The accelerated beams are delivered to the KoBRA [7] and NDPS [8]. At KoBRA, experiments on nuclear reactions, nuclear structure, and radiation effects on semiconductor devices for space applications have been carried out. At NDPS, studies on neutron production are currently in progress. In this presentation, the details and current status of the CLaSsy, KoBRA, and NDPS, and will be presented.
[1] K. Tshoo et al., Experimental systems overview of the Rare Isotope Science Project in Korea, Nucl. Instrum. Methods Phys. Res. B 317 (2013) 242-247.
[2] D. Jeon et al., Design of the RAON accelerator systems, J. Korean Phys. Soc. 65 (2014) 1019-1019.
[3] M. Kwon et al., RAON, Korean Heavy Ion Accelerator Facility, J. Particle Accelerator Soc. Jpn. 17 (2020) 293-301.
[4] S.J. Park et al., Development of the collinear laser spectroscopy (CLaSsy) at RAON, J. Korean Phys. Soc. 87 (2025) 649-654.
[5] J.Y. Moon et al., Construction of a new multi-reflection time-of-flight mass spectrograph at RAON, J. Korean Phys. Soc. 87 (2025) 640-648.
[6] C. Lim et al., Commissioning of the collinear laser spectroscopy (CLaSsy) at RAON, JINST 21 (2026) P05026.
[7] K. Tshoo et al., Recent progress in the construction of KoBRA for low-energy nuclear physics experiments, Nucl. Instrum. Methods Phys. Res. B 541 (2023) 56-60.
[8] C. Ham et al., Status of nuclear data production system at RAON, J. Korean Phys. Soc. 87 (2025) 662-669.