@inproceedings{oai:repo.qst.go.jp:00078351,
 author = {Zen, Heishun and Ohgaki, Hideaki and Hajima, Ryoichi and Hajima, Ryoichi},
 book = {Proceedings of  the 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)},
 month = {Jan},
 note = {A mid-infrared Free Electron Laser (MIR-FEL) is a candidate to realize a high-repetition-rate attosecond hard X-ray source based on the high harmonic generation (HHG). A new project to conduct proof of principle experiment of HHG driven by a MIR-FEL has been started from November 2018. For this purpose, upgrade projects of MIR-FEL at Kyoto University (KU-FEL) has been started to achieve high peak power and ultra-short pulse operation.},
 publisher = {IEEE},
 title = {Upgrade Projects of Mid-Infrared Free Electron Laser at Kyoto University for High Peak Power and Ultra-short Pulse Operation},
 year = {2020}
}