Development of IR-FEL facility for energy science in Kyoto University |
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Authors: | Heishun Zen Toshiteru Kii Kai Masuda Hideaki Ohgaki Tetsuo Yamazaki |
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Institution: | aInstitute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan |
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Abstract: | A mid-infrared free electron laser (FEL) has been constructed for energy science in the Institute of Advanced Energy, Kyoto University. The FEL system consists of a compact S-band Linac and an undulator to generate 4–13 μm coherent mid-infrared radiations. The Linac consists of a 4.5 cell rf gun with a thermionic cathode and a 3-m traveling-wave-type accelerator tube fed by 10 MW and 20 MW rf power, respectively. We have succeeded to produce 40 MeV, 40 mA and 3 μs electron beams. Last December, the 9.2 μm spontaneous emission from the undulator generated by 29.5 MeV electron beams was observed for the first time. Further optimization parameters of both the electron beam and the optical cavity are being pursued for an FEL lasing in the near future. |
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Keywords: | Mid-infrared Free electron laser Thermionic rf gun |
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