Research keywords (4)：
Laser Compton Scattering Gamma Ray
, Coherent Radiation
, Electron Accelerator
, Free Electron Laser
Research theme for competitive and other funds (9)：
2023 - 2026 Research on an inverse process of free electron laser for extreme high gradient particle acceleration
2022 - 2026 Study of ultrafast intense laser science with long-wavelength infrared free-electron laser pulses
2022 - 2025 Study on drastic increase of extraction efficiency of oscillator type free electron laser
2018 - 2021 Delbruck scattering using linearly polarized gamma-rays
2014 - 2018 Study on New THz Free Electron Laser Generation Scheme Using Ultra-short Electron Beam
2011 - 2014 Development of ultra-narrow band VUV coherent SR Source
2011 - 2012 Study on Generation of Intense and Short Pulse Synchrotron Radiation by Pulse Compression Technique
2008 - 2010 Generation of Coherent Radiation by Laser Micro-fabrication of Electron Beam
2008 - 2008 電子ビーム高輝度化のための高度計測技術の開発
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Papers (171)：
Mamoru Kitaura, Heishun Zen, Shinta Watanabe, Hirokazu Masai, Kei Kamada, Kyoung-Jin Kim, Akira Yoshikawa, Jumpei Ueda. Relationship between Ce3+ 5d1 level, conduction-band bottom, and shallow electron trap level in Gd3Ga5O12:Ce and Gd3Al1Ga4O12:Ce crystals studied via pump-probe absorption spectroscopy. Optical Materials: X. 2025. 25. 100398-100398
Norihiro Sei, Heishun Zen, Hideaki Ohgaki, Ryoichi Hajima. Temporal evolution of electron-bunch length in macropulse of resonator-type free-electron lasers. iScience. 2024. 27. 12. 111402-111402
Kentaro Maejima, Heishun Zen, Hiroyasu Sato, Eiji Nishibori, Tomoya Enjou, Youhei Takeda, Satoshi Minakata, Eri Hisamura, Ken Albrecht, Yuka Ikemoto, et al. A van der Waals porous crystal featuring conformational flexibility and permanent porosity for ultrafast water release. Communications Chemistry. 2024. 7. 1
Ju Yoon Hnin Bo, Heishun Zen, Hideaki Ohgaki. Measurement of temporal evolution of antiferromagnetic domain change in nickel oxide driven by 2TO phonon mode excitation via pump-probe experiment. Japanese Journal of Applied Physics. 2024. 63. 112001
Ju Yoon Hnin Bo, Heishun Zen, Kyohei Yoshida, Kan Hachiya, Rei Akasegawa, Hideaki Ohgaki. Observation of Selective Excitation of Raman Inactive Phonon Mode of Strontium Titanate Through Anti-Stokes Hyper-Raman Scattering Process. Journal of Infrared, Millimeter, and Terahertz Waves. 2024
河野哲朗, 寒河江登志朗, 境武志, ZEN Heishun, 大垣英明, 早川恭史, 岡田裕之. Frontier of material processing with burst mode pulsed laser: Application of Free Electron Laser in Dentistry-From Research in LEBRA-FEL and KU-FEL-. レーザ加工学会誌. 2022. 29. 3
Utilization of Infrared Free-Electron Laser at Kyoto University
(Seminar on "Particle Accelerators and Applications in Thailand" 2023)
Few cycle pulse generation from a high effciency free-electron laser oscillator operated in superradiance regime
(11th International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Based Sources 2022)
High extraction efficiency operation of oscillator-type Free Electron Laser driven by a normal conducting linac
(31st International Linear Accelerator Conference LINAC2022 2022)
Observation of Burnham-Chiao ringing with pi-phase jumps in a high-efficiency superradiance FEL oscillator
(The 40th International Free Electron Laser Conference (FEL2022) 2022)
2006 - 2009 Kyoto University Graduate School of Energy Science Department of Energy Conversion Science
2004 - 2006 Kyoto University Graduate School of Energy Science Department of Energy Conversion Science
2002 - 2004 Kyoto University Faculty of Engineering School of Electrical & Electronic Engineering
1997 - 2002 Suzuka National College of Technology Department of Electronic and Information Engineering
Professional career (1)：
博士(エネルギー科学) (京都大学)
Work history (3)：
2023/06 - 現在 Institute of Advanced Energy, Kyoto University Associate Professor
2011/07 - 2023/05 Kyoto University Institute of Advanced Energy Assistant Professor
2009/04 - 2011/06 Institute for Molecular Science UVSOR facility Assistant Professor
Committee career (12)：
2022/09 - 現在 International Free-Electron Laser Conference International Executive Committee
2022/04 - 2024/03 日本加速器学会 評議員
2021/10 - 2023/09 日本放射光学会 編集委員
2020/10 - 2022/10 11th International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Based Sources Local Organizing Committee & Scientific Program Committee
2019/08 - 2021/06 3rd International Conference on Nuclear Photonics (NP2020) Program Advisory Committee
2016/02 - 2016/02 7th Asian Forum for Accelerators and Detector Local Organizing Committee
2013/04 - 2013/09 The 35th International Free-Electron Laser Conference (FEL2013) Scientific Program Committee
2011/08 - 2012/08 The 34th International Free-Electron Laser Conference (FEL2012) Local Organizing Committee
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Awards (7)：
2021/06 - Particle Accelerator Society of Japan The 17th PASJ Award for Research Encouragement Research and development on improvement of extraction efficiency of free electron laser oscillator driven by a normal conducting accelerator
2021/06 - The Japan Society of Infrared Science and Technology Young Researcher Award of the Japanese Society of Infrared Science and Technology
2021/03 - The Physical Society of Japan Young Scientist Award of the Physical Society of Japan Research and Development of improving performance of a midinfrared free electron laser
2019/05 - The Japan Society of Infrared Science and Technology The 5th best paper award of Journal of the Japan Society of Infrared Science and Technology Direct observation of mode-selective phonon excitation induced by mid-infrared pulse laser with separation of the sum-frequency generation component
2015/10 - The Japan Society of Infrared Science and Technology 5th Best Presentation Award of the Japan Society of Infrared Science and Technology Development of Mid-Infrared Free Electron Laser at Institute of Advanced Energy, Kyoto University
2015/08 - Particle Accelerator Society of Japan Presentation Award of the 12th Annual Meeting of Particle Accelerator Society of Japan Multi-bunch photoelectron beam generation from LaB6 cathode in an RF gun and its utilization to MIR-FEL oscillation
2008/09 - Subcommittee on Particle Accelerators and Beams Science, Atomic Energy Society of Japan Presentation Award Improvement of energy distribution of electron beam by RF amplitude control at a driver linac of MIR-FEL
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Association Membership(s) (5)：
Atomic Energy Society of Japan
, The Japan Society of Infrared Physics and Technology
, The Physical Society of Japan
, The Japanese Society of Synchrotron Radiation Research
, Particle Accelerator Society of Japan
