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Generation and applications of ultrashort electron beams in energy-recovery linacs

エネルギー回収型リニアックにおける超短パルス電子ビームの発生と利用

羽島 良一; 中村 典雄*; 島田 美帆*

Hajima, Ryoichi; Nakamura, Norio*; Shimada, Miho*

エネルギー回収型リニアック(ERL)は、高輝度,短パルス,大電流の電子ビームの発生が可能であり、さまざまな光源への利用が進みつつある。本講演では、大強度テラヘルツ光源,コヒーレントX線光源への利用を例に取り、ERLにおける超短パルス電子ビームの生成方法,エミッタンス保存手法などを概説する。

Energy-recovery linac (ERL) is a novel type of accelerator to generate an electron beam of high quality and high average current. In an ERL, an electron beam from an injector is accelerated by time-varying RF field stored in a superconducting linac and the beam is transported to a recirculation loop. After the recirculation loop, the beam is decelerated by the same superconducting linac for the energy recovery. In this talk, challenges for the generation of ultrashort electron bunches in ERLs are discussed, and applications of ultrashort electron bunches from ERLs are presented.

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