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Report No.

Systematic calibration of beam position monitor at J-PARC LINAC

Sato, Susumu ; Tomisawa, Tetsuo ; Hiroki, Fumio ; Lee, S.*; Igarashi, Zenei*; Ikegami, Masanori*; Ueno, Akira ; Kondo, Yasuhiro ; Hasegawa, Kazuo; Toyama, Takeshi*; Kishiro, Junichi; Kamikubota, Norihiko*; Takagi, Makoto*; Tanaka, Mikio*; Akikawa, Hisashi; Sakaki, Hironao; Yoshikawa, Hiroshi

As a joint project of KEK and JAERI, a MW class of high intensity proton accelerator (J-PARC), consisting of Linac, 3 GeV-RCS, 50 GeV-MR, is under construction. For this accelerator, it is required to minimize the beam loss (typically, lower than0.1$$sim$$1 W/m at the linac). To achieve the requirement, beam trajectory needs to be controlled with accuracy of some 100 $$mu$$m. The first stage of the acceleration (up to 181 MeV during the first stage of construction) is done by linac. The beam position monitor (BPM) in the linac utilizes 4 stripline pickups (50 ohm) on the beam transportation chamber. In this paper, systematic calibration of the BPM is described.



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