2022/12/09 by H. Sakai, Hiromitsu Haba, K. Morimoto +1 · 1 citation
Physics and Astronomy · Engineering · #Nuclear Physics and Applications #Nuclear physics research studies #Nuclear reactor physics and engineering #Upgrade #Nuclear physics #Element (criminal law) #Superheavy Elements #Nuclear engineering #Environmental science #Systems engineering #Physics #Computer science #Engineering #Political science #Operating system
paper · pdf · doi:10.1140/epja/s10050-022-00888-3
openalex publication_date 2022/12/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02
The RIKEN Nishina Center (RNC) executed an accelerator upgrade project for the heavy-ion linac (called RILAC). A superconducting RIKEN linear accelerator (SRILAC) and a new superconducting electron-cyclotron-resonance ion source (SC-ECRIS) to boost the final energy and intensity were constructed, aimed at synthesizing a new superheavy element, 119, through a hot fusion reaction. The project included the construction of a gas-filled recoil ion separator (GARIS-III) suitable for detecting the residues of the hot-fusion reaction. To avoid research interruption during the SRILAC construction period (2017-2019) and gain experience in hot-fusion reaction processes, GARIS-II located in the GARIS experimental hall in LINAC building was moved to the E6 experimental hall in Nishina building. Certain exploratory measurements were performed employing the beams accelerated by RILAC2 and the RIKEN ring cyclotron (RRC), which is a part of the existing accelerator complex of the radioactive isotope beam factory (RIBF). Further, commissioning experiments with the upgraded facility (SRILAC and GARIS-III) were performed. The upgrade project and its commissioning results are chronologically described in this article.