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Report No.

Operating experience of kicker magnet system in the J-PARC 3GeV RCS

Suganuma, Kazuaki ; Togashi, Tomohito; Watanabe, Masao ; Kinsho, Michikazu 

Technical issues of the kicker magnet system in the J-PARC 3GeV RCS are presented based on the operating experience during four years. For the high voltage cables, many scratches on the polyethylene surface were observed at the edge parts, the surfaces were reinforced by a semi-conductive layer with high-dielectric materials. For all matching resisters, the values have been increased due to deterioration with age, and the counter measure is under reviewing. For Thyratron tubes, a stable operation was established, and the beam stop rate by false operation was drastically reduced from 13% to less than 0.5%.



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