Author: Komiyama, A.K.
Paper Title Page
MOPPT008 Present Status of Cyclotrons (NIRS-930, HM-18) at NIRS 46
  • S. Hojo, T. Honma, K. Katagiri, M. Nakao, A. Noda, K. Noda, A. Sugiura
    NIRS, Chiba-shi, Japan
  • A.K. Komiyama, T. Okada, Y. Takahashi
    AEC, Chiba, Japan
  The cyclotron facility at National Institute of Radiological Science (NIRS) consists of a NIRS-930 cyclotron (Thomson-CSF AVF-930, Kb=110 MeV and Kf=90 MeV) and a small cyclotron HM-18(Sumitomo- Heavy- Industry HM-18). The NIRS-930 has been used for production of short-lived radio-pharmaceuticals for PET, research of physics, developments of particle detectors in space, and so on. The orbit of a beam in the NIRS-930 cyclotron was simulated with integrated approach to modelling of the cyclotron, including calculation of electromagnetic fields of the structural elements. And some improvements such as installation of extracted beam probe, a beam attenuator and a beam viewer in an injection beam line, were performed in the NIRS-930. The HM-18 has been used for production of short-lived radio-pharmaceuticals for PET. It allows us to accelerate H-and D- ion at fixed energies of 18 and 9 MeV, respectively. In order to improve the isochronism, a phase probe has been newly installed in the HM-18. Above improvements and operational status of the cyclotron facility are to be presented in this report.