| 摘要 |
PROBLEM TO BE SOLVED: To control an accelerator which does not require magnetic field measurement of a deflection electromagnet and is of low cost with high reliability, and is easy in operation control. SOLUTION: The control device 1 includes a timer 2, a pattern 3 memory for deflection electromagnet current, a frequency pattern memory 4, and a frequency reference value correction circuit 5. Time clock is simultaneously transmitted serially at prescribed time intervals from the timer 2 to the pattern memory 3 for deflection electromagnet current and the frequency pattern memory 4. When synchronized with this time clock, a current reference value of a deflection electromagnet is output from the pattern memory 3 for defection electromagnet current to a deflection electromagnet current generator 6 and a coil current flows to the deflection electromagnet 10. Similarly, the frequency reference value output from the frequency pattern memory 4 is corrected by a current deviation signal from the deflection electromagnet current generator 6 and output to a frequency generator 7, thereby, circuiting beams 11 are accelerated based on the corrected frequency reference value. COPYRIGHT: (C)2008,JPO&INPIT
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