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Nishimori, Nobuyuki; Hajima, Ryoichi; Nagai, Ryoji
Free Electron lasers 2003, p.II_21 - II_22, 2004/00
Free-Electron Laser (FEL) interaction with unbunched electrons at resonant energy induces a positive phase shift of the FEL field relative to the input phase. The positive phase shift corresponds to giving electrons positive energy detuning, and results in the FEL amplification. The zero small signal gain on resonance in low gain regime is related to the exponential growth in high gain regime by the positive phase shift.
Sawamura, Masaru; Hajima, Ryoichi; Kikuzawa, Nobuhiro; Minehara, Eisuke; Nagai, Ryoji; Nishimori, Nobuyuki
Free Electron lasers 2003, p.II_31 - II_32, 2004/00
no abstracts in English
Sekiguchi, Tetsuhiro; Baba, Yuji; Shimoyama, Iwao; Nath, K. G.
Free Electron lasers 2003, p.II_69 - II_70, 2004/00
no abstracts in English