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Report No.

Bright electron multi-bunch production for the high power JAERI-FEL oscillator

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

Stable and bright electron multi-bunches at 16.5 MeV with a long macro-pulse duration over 0.4 ms, which consists of 4,000 micro-bunches, have been produced at the Japan Atomic Energy Research Institute (JAERI) superconducting linac driven Free-Electron Laser (FEL) facility. The bunch charge is 0.5 nC with peak current higher than 100 A. The bright electron bunch was generated using a RF compression made in two stages in the injector system, and directly led to a quasi-CW kilowatt lasing. In this paper, we describe the bunching system and electron beam performances in JAERI-FEL.



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