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Three dimensional gain analysis of free electron laser with focusing permanent magnet wiggler |
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| Authors: | Yoshiaki Tsunawaki Nobuhisa Ohigashi Kunioki Mima Shin-ichiro Kurama Kazuo Imasaki Masayuki Fujita Chiyoe Yamanaka and Sadao Nakai |
| Institution: | (1) Department of Electrical Engineering & Electronics, Osaka Sangyo University, Naka-gaito, Daito, 574 Osaka, Japan;(2) Department of Physics, Kansai University, Yamate-cho, Suita, 564 Osaka, Japan;(3) Institute of Laser Engineering, Osaka University, Yamada-oka, Suita, 565 Osaka, Japan;(4) Institute for Laser Technology, Yamada-oka, Suita, 565 Osaka, Japan |
| Abstract: | A three dimensional simulation software system developed to estimate a free electron laser (FEL) gain has been applied to FEL using a standard plane polarized wiggler and an alternately shifted magnet wiggler. It is seen for the latter wiggler that a large filling factor could be selected and each maximum gain corresponding to each orbit of electron beam concentrates at a certain frequency region of FEL radiation. It is, therefore, implied that a proper shift between the adjacent magnets in the wiggler produces the improvement of the FEL gain. |
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