Present Status and Perspectives of Long Wavelength Free Electron Lasers at Kyoto University
H. Zen
, S. Suphakul, T. Kii, K. Masuda, H. Ohgaki, Physics Procedia, Volume 84, Pages 47-53 (2016).

Development of intense terahertz coherent synchrotron radiation at KU-FEL
N. Sei, H. Zen, H. Ohgaki, Nuclear Instruments and Methods in Physics Research Section A, Volume 832, Pages 208-213 (2016).

Beam Dynamics Investigation for the Compact Seeded THz-FEL Amplifier
S. Suphakul, K. Damminsek, H. Zen, T. Kii, H. Ohgaki, Energy Procedia, Volume 89, Pages 373–381 (2016).