@misc{oai:repo.qst.go.jp:00085886,
 author = {Ryoichi, Hajima and Zen, H. and Ohgaki, H. and Ryoichi, Hajima},
 month = {Sep},
 note = {The ionization of gases by ultrafast laser pulses is an important research topic as a fundamental process for the high-harmonic generation. The generation of few-cycle pulse at long-wavelength infrared (>8 um) has recently become possible with KU-FEL. We are conducting gas ionization experiments using these FEL pulses. So far, we have performed ionization experiments with nitrogen, air, and argon. In this presentation, we will report the results of spectroscopic and time waveform measurements of the emission that appears at ionization., The 12th International Symposium of Advanced Energy Science},
 title = {Gas Ionization with Ultrafast Intense Long-Wavelength Infrared Pulses},
 year = {2021}
}