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Miyawaki, Nobumasa; Okumura, Susumu; Kurashima, Satoshi; Kashiwagi, Hirotsugu; Yoshida, Kenichi; Yuri, Yosuke; Yuyama, Takahiro; Ishibori, Ikuo; Agematsu, Takashi; Ishizaka, Tomohisa; et al.
Proceedings of 4th Annual Meeting of Particle Accelerator Society of Japan and 32nd Linear Accelerator Meeting in Japan (CD-ROM), p.604 - 606, 2007/00
The main probe of the JAEA AVF cyclotron has been modified to measure a beam phase width in the accelerating region without extracting the beam from the cyclotron, which could cause the beam loss at the extraction device. The main probe consists of a carbon block for a beam current measurement and a plastic scintillator for a beam phase measurement. A correlation between the beam phase width and the position of phase slits was confirmed.