| 摘要 |
PROBLEM TO BE SOLVED: To provide a beam monitor capable of preventing discharging by charged electrification of a fluorescent beam monitor, installed on a beam passing path of a charged particle accelerator, and measuring accurately the position, the size and the shape of the beam. SOLUTION: Many holes are formed on a conductive material, installed on a fluorescent screen in physically and chemically adhesive state, to measure the position and the shape of the beam, and the conductive material is grounded, to prevent discharge caused by the electrification.
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