FEL2012 - List of Authors (Sakai, T.)

Paper	Title	Page
WEPD46	Pulse Structure Measurement of Near-Infrared FEL in Burst-Mode Operation of LEBRA Linac	472
	K. Nakao, K. Hayakawa, Y. Hayakawa, M. Inagaki, K. Nogami, T. Sakai, T. Tanaka LEBRA, Funabashi, Japan H. Zen Kyoto University, Institute for Advanced Energy, Kyoto, Japan
	The near-infrared free electron laser (FEL) at the Laboratory for Electron Beam Research and Application (LEBRA) in Nihon University has been provided for scientific studies in various fields since 2003. Improvement in the electron beam injector system for the LEBRA 125MeV electron linac made possible to accelerate the electron beam in three different modes, full-bunch mode, superimpose mode and burst mode. FEL lasing in the second and the third modes was achieved in 2011. The FEL pulse lengths in the full-bunch mode and the burst mode, measured at an FEL wavelength of 1600 nm with autocorrelation method using a Michelson interferometer, were approximately 100 fs and 180 fs, respectively. The FEL gain in the burst mode was apparently much higher than that in the full-bunch mode. Although the autocorrelation method provides only a rough estimate, the burst-mode FEL pulse structure was suggested to be different from the full bunch mode.

Paper

Title

Page

Pulse Structure Measurement of Near-Infrared FEL in Burst-Mode Operation of LEBRA Linac

472

K. Nakao, K. Hayakawa, Y. Hayakawa, M. Inagaki, K. Nogami, T. Sakai, T. Tanaka
LEBRA, Funabashi, Japan
H. Zen
Kyoto University, Institute for Advanced Energy, Kyoto, Japan

The near-infrared free electron laser (FEL) at the Laboratory for Electron Beam Research and Application (LEBRA) in Nihon University has been provided for scientific studies in various fields since 2003. Improvement in the electron beam injector system for the LEBRA 125MeV electron linac made possible to accelerate the electron beam in three different modes, full-bunch mode, superimpose mode and burst mode. FEL lasing in the second and the third modes was achieved in 2011. The FEL pulse lengths in the full-bunch mode and the burst mode, measured at an FEL wavelength of 1600 nm with autocorrelation method using a Michelson interferometer, were approximately 100 fs and 180 fs, respectively. The FEL gain in the burst mode was apparently much higher than that in the full-bunch mode. Although the autocorrelation method provides only a rough estimate, the burst-mode FEL pulse structure was suggested to be different from the full bunch mode.