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内容記述 |
The cyclotron facility of Institute for Quantum Medical Sciences (i-QMS), at National Institutes for Quantum Science and Technology (QST) includes the NIRS-930 cyclotron (Thomson-CSF AVF-930, Kb=110 MeV and Kf=90 MeV) and HM-18 cyclotron (Sumitomo- Heavy- Industry HM-18, K=20 MeV). The NIRS-930 has been used for production of radionuclide. Other purposes of NIRS-930 are research of physics, developments of particle detectors in space, research of biology, and so on. The HM-18 is a fixed-energy-negative-ion accelerator, has been providing 18 MeV protons and 9 MeV deuterons to produce short-lived radiopharmaceuticals for Positron Emission Tomography (PET). A fire broke out in the power supply of the cyclotron facility in November 2021. There were no casualties, but both the NIRS-930 and the HM-18 were stopped because power supplies have been damaged by the soot and water used to extinguish the fire. The HM-18 was back in operation for RI production in September 2022. The total operation time of the HM-18 at FY2024 was 1054 hours. The maintenance period was from December 2024 to March 2025. During the maintenance period, the power receiving panel, distribution panel, cooling water piping and valves were updated. |
