Kyoto IAE, Kyoto
KAERI, Daejon
* H. Ohgaki et al., "Design studies of IR-FEL system at IAE, Kyoto University", Nucl. Instrum. Methods in Phys. Res. A, vol.507, pp.150-153 (2003)
| Paper | Title | Page |
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| MOAAU02 | First Lasing of MIR-FEL at Kyoto University | 4 |
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First lasing of Mid-Infrared Free Electron Laser was achieved at Institute of Advanced Energy (IAE), Kyoto University. The FEL driver, KU-FEL*, consists of a 4.5 cell thermionic RF gun, a 3-m S-band accelerator tube, and a 1.6-m plane undulator. The 25 MeV electron beam of 17 A peak current was employed for the lasing experiment. A beam loading compensation method with RF amplitude and phase control has been applied both for the RF gun and for the accelerator tube to extend the macro-pulse duration against the back bombardment effect in the thermionic RF gun. As a result the electron beam with about 6 micro-s duration has been available for the lasing experiment. About 106 times large light output than that from the spontaneous light was observed with a liq. N2 cooled IR detector. The FEL gain was 16% which was estimated from the exponential growth of the light and this shows good agreement with a gain simulation.
* H. Ohgaki et al., "Design studies of IR-FEL system at IAE, Kyoto University", Nucl. Instrum. Methods in Phys. Res. A, vol.507, pp.150-153 (2003) |
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