Estimation of HOM-BBU threshold current for an energy recovery linac

Nagai, Ryoji; Hajima, Ryoichi; Sawamura, Masaru; Nishimori, Nobuyuki; Iijima, Hokuto; Kikuzawa, Nobuhiro ; Minehara, Eisuke

A collaborative project towards an ERL light source has been launched in Japan. In this project, the superconducting cavity is optimized for a high-average current beam. The latest design is a 9-cell cavity of 1.3 GHz with enlarged beam pipes and on-axis HOM absorbers. In this paper, beam breakup instabilities for the newly designed cavity is investigated. Threshold current of beam breakup at a 5-GeV ERL and possible extention to multi-turn configuration is presented.

Language	:	Japanese
Journal	:	Proceedings of 4th Annual Meeting of Particle Accelerator Society of Japan and 32nd Linear Accelerator Meeting in Japan (CD-ROM)
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Pages	:	p.637 - 639
Publication Year/Month	:	2007/00
Meeting title	:	第4回日本加速器学会年会・第32回リニアック技術研究会
Held date	:	2007/08
Location (city)	:	和光
Location (country)	:	日本
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Keywords	:	no keyword
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Registration No. : BB20071102
JAEA Abstracts No. : 36000137
Paper Submission No. : 3471

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