@inproceedings{oai:repo.qst.go.jp:00078352, author = {Hajima, Ryoichi and Hajima, Ryoichi}, book = {Proceedings of 2019 IEEE Photonics Conference (IPC)}, month = {Oct}, note = {We present a scheme for high-harmonic-generation (HHG) driven by infrared free-electron lasers (FEL), which can be operated at MHz-repetition. Wavelength tunability of FEL enables one to explore HHG from mid-infrared pulses for higher cutoff energies above 1 keV. Plans and status of R&D are also presented.}, publisher = {IEEE}, title = {High-Repetition-Rate High-Harmonic Generation Driven by Infrared Free-Electron Lasers}, year = {2019} }