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Report No.
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Development of fast beam-stop system using RF chopper

Kikuzawa, Nobuhiro ; Suzuki, Takahiro; Ito, Yuichi; Miura, Akihiko ; Fukuta, Shimpei; Ikegami, Masanori*; Sako, Hiroyuki  ; Kobayashi, Tetsuya; Suzuki, Hiroyuki; Hasegawa, Kazuo

To avoid heat damage and radioactivation by beam loss of the J-PARC accelerator, Machine Protection System (MPS) has been developed. Actually, high responsibility and high reliability have been achieved in J-PARC. Beam-stop method in addition to a way of RFQ OFF has been requested in order to avoid damage to the RFQ. Therefore, we have been developing a fast beam-stop system by using a RF chopper. The fast beam-stop system, including beam test, is described in this paper.

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