Speaker
Description
RAON, South Korea’s first heavy-ion accelerator, is equipped with the nation’s largest-capacity cryogenic system. The system consists of two cryogenic plants, one of which supports the operation of Superconducting Linear Accelerator 3 (SCL3). The SCL3 cryogenic system is designed to cool the superconducting linear accelerator down to 4.5 K and 2.05 K and to maintain stable cryogenic conditions during SCL3 operation. In 2026, a momentary power outage caused by a disturbance in the regional power grid affected the cryogenic system. Several cryogenic components shut down, increasing the system temperature and temporarily interrupting beam testing. A series of recovery actions and re-cooling procedures were carried out to restore stable cryogenic operation, after which beam testing was resumed. This presentation describes the response of the SCL3 cryogenic system to the momentary power outage and the subsequent recovery process. It also discusses the vulnerabilities identified during the event and measures to improve system reliability against future power disturbances.