| 摘要 |
PROBLEM TO BE SOLVED: To chop sharply without requiring any large capacity power source. SOLUTION: A multitude of electrodes 30 independent to each other are lined in parallel in the beam axis direction 10. Power source side switches 38 arranged in a multitude of electricity supplying cables 32 connected to each electric source independently to each other are made on and off in turn adjusting the timing of passing of beam bunches a, b... through each power source.
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