Keyword: cyclotron
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MOPKS020 Low Level RF Control System for Cyclotron 10 MeV controls, feedback, low-level-rf, cavity 199
  • J. Huang, D. Li, K.F. Liu
    Huazhong University of Science and Technology (HUST), Wuhan, People's Republic of China
  • T. Hu
    HUST, Wuhan, People's Republic of China
  The low level RF control system consists of a 101MHz signal generator, three feedback loops, an interlock and a protection system. The stability of control system is one of the most important indicators in the cyclotron design, especially when the whole system has a high current. Due to the hugeness of the RF system and the complexity of control objects, the low level RF control system must combine the basic theory with the electronic circuit to optimize the whole system. The major obstacles in the research, which rarely exist in other control systems, lay in the coupling of beam and resonant cavity, requiring to be described by the transfer function between beam and cavity, the complex coupling between microwave devices and the interference signals of all loops. By introducing the three feedback loops (tuning loop, amplitude loop and phase loop) and test results from some parts of electric circuits, this paper unfolds the performance index and design of low level RF control system, which may contribute to the design of cyclotron with a high and reliable performance.  
MOPMN001 Beam Sharing between the Therapy and a Secondary User controls, interface, proton, network 231
  • K.J. Gajewski
    TSL, Uppsala, Sweden
  The 180 MeV proton beam from the cyclotron at The Svedberg Laboratory is primarily used for a patient treatment. Because of the fact that the proton beam is needed only during a small fraction of time scheduled for the treatment, there is a possibility to divert the beam to another location to be used by a secondary user. The therapy staff (primary user) controls the beam switching process after an initial set-up which is done by the cyclotron operator. They have an interface that allows controlling the accelerator and the beam line in all aspects needed for performing the treatment. The cyclotron operator is involved only if any problem occurs. The secondary user has its own interface that allows a limited access to the accelerators control system. Using this interface it is possible to start and stop the beam when it is not used for the therapy, grant access to the experimental hall and monitor the beam properties. The tools and procedures for the beam sharing between the primary and the secondary user are presented in the paper.  
poster icon Poster MOPMN001 [0.924 MB]  
MOPMU018 Update On The Central Control System of TRIUMF's 500 MeV Cyclotron controls, software, hardware, operation 469
  • M. Mouat, E. Klassen, K.S. Lee, J.J. Pon, P.J. Yogendran
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  The Central Control System of TRIUMF's 500 MeV cyclotron was initially commissioned in the early 1970s. In 1987 a four year project to upgrade the control system was planned and commenced. By 1997 this upgrade was complete and the new system was operating with increased reliability, functionality and maintainability. Since 1997 an evolution of incremental change has existed. Functionality, reliability and maintainability have continued to improve. This paper provides an update on the present control system situation (2011) and possible future directions.  
poster icon Poster MOPMU018 [4.613 MB]