CONTROL DEVICE OF ACCELERATOR

PROBLEM TO BE SOLVED: To extract a plurality of beams different in energy in a short time in an accelerator. SOLUTION: A control device of the accelerator is equipped with a magnetic field reference generating portion and an electric current reference converting portion. The magnetic field reference generating portion stores an initial elevation pattern in which magnetic flux density increases from an initial value to an initial acceleration completion level, a reduction pattern in which the magnetic flux density decreases by a prescribed width of reduction, and an ending pattern in which the magnetic flux density decreases to the ending value, and according to time lapse, outputs magnetic flux information corresponding to the initial elevation pattern in the case of receiving an initial elevation instruction, the magnetic flux information corresponding to the reduction pattern in the case of a reduction instruction after outputting the magnetic flux information corresponding to the initial elevation pattern, and the magnetic flux information corresponding to the ending pattern in the case of receiving an ending instruction. The electric current reference converting portion obtains a coil current value to generate a magnetic field corresponding to the renewed magnetic flux information, and inputs it into a power supply portion of a magnetic field coil of the accelerator. COPYRIGHT: (C)2011,JPO&INPIT