Analysis of phase bunching in AVF cyclotron

Miyawaki, Nobumasa; Kurashima, Satoshi; Kashiwagi, Hirotsugu; Okumura, Susumu; Yoshida, Kenichi; Yuri, Yosuke; Yuyama, Takahiro; Ishizaka, Tomohisa; Ishibori, Ikuo; Nara, Takayuki

A phase bunching effect in the central region of the JAEA AVF cyclotron has been investigated to obtain a narrow beam phase width necessary for extraction of a low energy spread beam. Simulation of a beam trajectory in the central region indicated that phase bunching was generated for the acceleration harmonic number () 2 and 3. The beam phase distribution of a 260 MeV $^{20}$ Ne $^{7+}$ ( = 2) beam in the cyclotron was measured in order to experimentally confirm the phase bunching effect. As a result, reduction of the phase distributions from 18.9 to 4 RF degrees was observed as consistent with the calculation results.

Language	:	English
Journal	:	JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012
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Pages	:	P. 158
Publication Year/Month	:	2014/03
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Paper URL	:	https://doi.org/10.11484/jaea-review-2013-059
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Keywords	:	no keyword
Research Facility	:	TIARA(イオン照射研究施設)
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Registration No. : AA20130208
JAEA Abstracts No. :
Paper Submission No. : 17467

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