Study of J-PARC linac beam position monitor as phase monitor

Sato, Susumu  ; Miura, Akihiko ; Tomisawa, Tetsuo ; Sako, Hiroyuki   ; Morishita, Takatoshi  ; Ueno, Akira  ; Hasegawa, Kazuo; Yoshikawa, Hiroshi; Igarashi, Zenei*; Ikegami, Masanori*

In J-PARC LINAC, about a hundred of beam position monitors (BPM's) with stripline electrodes are being operated. Signals from striplines would be useful also for beam phase measurement, for which we are currently using fast current transformer monitors (FCT's), and then we are taking a study for such usages. In this paper, current situation of our studies both with the test bench and with the negative H beam is presented.