Research field (1)：
Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research theme for competitive and other funds (3)：
2019 - 2024 X-ray source for Novel imaging paradigm
2018 - 2021 Delbruck scattering using linearly polarized gamma-rays
2016 - 2019 Relativistic Flying Mirror Gamma Ray Source
Papers (164)：
Andreas Bierwage, Timur Zh. Esirkepov, James K. Koga, Alexander S. Pirozhkov, Nobuyuki Aiba, Kai Huang, Masaki Kando, Hiromitsu Kiriyama, Akinobu Matsuyama, Kouji Shinohara, et al. Evolution of a laser wake cavity in a MCF plasma. Scientific Reports. 2024. 14. 1
Ryoichi Hajima, Keigo Kawase, James Koga, Heishun Zen, Hideaki Ohgaki. Breakdown of argon by a train of high-repetition long-wave-infrared pulses from a free-electron laser oscillator. Optics Express. 2024
Masaki Kando, Alexander Pirozhkov, James Koga, Timur Zh. Esirkepov, Sergei V. Bulanov. Prospects of Relativistic Flying Mirrors for Ultra-High-Field Science. Photonics. 2022
James Koga. Nanoscale subsurface dynamics of solids upon high-intensity femtosecond laser irradiation observed by grazing-incidence x-ray scattering. Physical Review Research. 2022. 4. 3
Tae Moon Jeong, Sergei V. Bulanov, Petr Valenta, Georg Korn, Timur Zh. Esirkepov, James K. Koga, Alexander S. Pirozhkov, Masaki Kando, Stepan S. Bulanov. Relativistic flying laser focus by a laser-produced parabolic plasma mirror. Physical Review A. 2021. 104. 5
