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Status and development for the JAERI ERL-FEL for high-power and long-pulse operation

大出力及び長パルス運転のための原研エネルギー回収型FELの現状と開発

沢村 勝; 羽島 良一; 菊澤 信宏; 峰原 英介; 永井 良治; 西森 信行

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

原研エネルギー回収型超伝導加速器はエネルギー回収成功後、大出力及び長パルス運転のための改造を行っている。エネルギー回収部分でない加速空洞のために連続波運転可能な新しい高周波源を取付け、長パルス運転の試験を行っている。この長パルス運転のときに必要となるクライオスタット内の圧力変化,振動による周波数変化,ピエゾチューナーの応答速度等の超伝導空洞の特性試験を行った。また新しい高周波制御系も更新し、高周波変動を振幅で0.1%、位相で0.1度以下にすることができた。

After the success of energy recovery linac (ERL) for the superconducting free-electron laser (FEL) in the Japan Atomic Energy Research Institute (JAERI), the JAERI ERL-FEL has been upgrading for high-power and long-pulse operation. The new RF sources of CW mode for higher power for non-energy-recovery parts have been installed and tested for long-pulse operation. The properties of the superconducting linac required for the long-pulse operation were measured such as pressure in the cryomodule, vibration of frequency and piezo tuner response. The RF control systems have been also upgraded to reduce the fluctuation to less than 0.1% for amplitude and 0.1 deg for phase.

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