Speaker
Description
The Rare Isotope Accelerator complex for ON-line experiments (RAON) in Korea is poised to open a new phase in precision nuclear physics, where close interplay among theory, simulation, and experiment is essential. Because nuclear processes occur at femtometer scales and cannot be directly observed, large-scale computational simulations have become an essential component of modern experiments. Large-scale beam simulations using Geant4 as well as ab initio nuclear structure calculations have been successfully carried out using the KISTI-5 supercomputer (Nurion). These studies have enabled predictions of the properties of neutron-deficient isotopes, such as 21Na, which have been experimentally verified at RAON.
The upcoming KISTI-6 supercomputer features a peak performance of approximately 600 PFLOPS and a heterogeneous CPU–GPU architecture, significantly extending the computational frontier. It will enable high-precision nuclear many-body calculations using methods such as the no-core shell model and nuclear lattice effective field theory, allowing simulations of nuclei up to A≈100–200. These advances will improve detector design, rare isotope predictions, and studies of neutron-rich matter, enhancing the role of supercomputing in nuclear physics in the exascale era.
