Yamamoto Masahiro

ヤマモトマサヒロ | Yamamoto Masahiro

Affiliation and department：
Job title： Assistant Professor
Other affiliations (1)：

筑波大学数理物質科学研究科准教授

Research field (2)： Quantum beam science , Particle, nuclear, cosmic-ray, and astrophysics - experiment

Research keywords (12)： Electron microscope , Energy Recovery Linac , Extreme high vacuum , Negative electron affinity , Field emission dark current , Accelerator , High voltage , Low emittance electron source , photocathode , Ultra high vacuum , スピン偏極電子源 , polarized electron source

Research theme for competitive and other funds (8)：

2020 - 2023 Demonstration of a low energy dispersion beam using a superconducting RF cavity and its application to a transmission electron microscope
2016 - 2020 Basic research on vacuum gap insulation for ultra-high voltage devices
2015 - 2018 Feasibility study of compact high-voltage TEM using a superconducting RF cavity
2005 - 2005 リニアコライダー用スピン偏極電子源の開発
2003 - 2005 Development of ultra-low-emittance electron source

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Papers (66)：

H. Sakai, K. Harada, N. Higashi, Y. Honda, Y. Kamiya, Y. Morikawa, N. Nakamura, H. Shimizu, O. Tanaka, K. Umemori, et al. Conceptual design of the high-power electron beam irradiator using niobium-tin superconducting cavity. Journal of Physics: Conference Series. 2024. 2687. 092013
Lei Guo, Fangze Liu, Kazuki Koyama, Nolan Regis, Anna M. Alexander, Gaoxue Wang, Jeffrey DeFazio, James A. Valdez, Anju Poudel, Masahiro Yamamoto, et al. Rugged bialkali photocathodes encapsulated with graphene and thin metal film. Scientific Reports. 2023. 13. 1
Fangze Liu, Lei Guo, Jeffrey DeFazio, Vitaly Pavlenko, Masahiro Yamamoto, Nathan A. Moody, Hisato Yamaguchi. Photoemission from Bialkali Photocathodes through an Atomically Thin Protection Layer. ACS Applied Materials & Interfaces. 2021. 14. 1. 1710-1717
R. Kato, M. Adachi, S. Eguchi, K. Harada, N. Higashi, Y. Honda, T. Miyajima, S. Nagahashi, N. Nakamura, K.N. Nigorikawa, et al. Construction of an Infrared FEL at the Compact ERL. Proceedings of IPAC2021. 2021. 1608-1611
Feng Qiu, Takako Miura, Dai Arakawa, Nao Higashi, Yosuke Honda, Eiji Kako, Toshihiro Matsumoto, Shinichiro Michizono, Tsukasa Miyajima, Takashi Obina, et al. Application of disturbance observer-based control on pulsed superconducting radio frequency cavities. Physical Review Accelerators and Beams. 2021. 24. 1

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MISC (44)：

Guo Lei, Yamaguchi Hisato, Yamamoto Masahiro, Matsui Fumihiko, Wang Gaoxue, Liu Fangze, Moody Nathan A., Takashima Yoshifumi, Katoh Masahiro. Graphene as Reusable Substrate for Thin Film Photocathodes. Journal of the Particle Accelerator Society of Japan. 2021. 18. 3. 134-142
T. Konomi, Y. Honda, E. Kako, Y. Kobayashi, S. Michizono, T. Miyajima, H. Sakai, K. Umemori, S. Yamaguchi, M. Yamamoto. Development of High Intensity, High Brightness, CW SRF Gun with Bi-Alkali Photocathode. Proceedings of SRF2019, Dresden, Germany. 2019. 1219-1222
Yu Morikawa, Kaiichi Haga, Masayuki Hagiwara, Kentaro Harada, Nao Higashi, Tohru Honda, Yosuke Honda, Mitsugu Hosumi, Yukihide Kamiya, Ryukou Kato, et al. New Industrial Application Beamline for the cERL in KEK. Proceedings of IPAC2019, Melbourne, Australia. 2019. 3475-3477
T. Konomi, Y. Honda, E. Kako, Y. Kobayashi, S. Michizono, T. Miyajima, H. Sakai, K. Umemori, S. Yamaguchi, M. Yamamoto. Design and fabrication of Kek superconducting RF gun #2. Proceedings of LINAC2018, Beijing, China. 2018. 510-512
T. Konomi, Y. Honda, E. Kako, Y. Kobayashi, S. Michizono, T. Miyajima, H. Sakai, K. Umemori, S.Yamaguchi, M.Yamamoto, et al. Development of SRF Gun Applying New Cathode Idea using a Transparent Superconducting Layer. Proceedings of ERL2017, Geneva, Switzerland. 2017. 1-3

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Lectures and oral presentations (11)：

Relation between electron stimulated desorption and dc high voltage discharge under ultra-high vacuum
(International Vacuum Congress (IVC-20) 2016)
Effective pumping speed measurement of a cryopump under XHV using a standard conductance element
(The 77th IUVSTA Workshop 2016)
大電流CWビーム運転前後の半導体フォトカソードQE分布測定
(第13回日本加速器学会年会 2016)
超高真空における電子刺激脱離と直流放電現象の関係
(第13回日本加速器学会年会 2016)
Development of a 500 kV DC Gun with Narrow Gap
(Workshop on Energy Recovery Linacs (ERL2015) 2015)

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Works (2)：

低エミッタンス電子源の開発
2007 - 現在
Development of polarized electron source
2000 - 現在

Professional career (1)：

理学博士 (名古屋大学)

Work history (4)：

2019/04 - 現在 High Energy Accelerator Research Organization (KEK) Accelerator Laboratory Associate Professor
2010/04 - 2019/03 High Energy Accelerator Research Organization (KEK) Accelerator Laboratory Assistant professor
2009/04 - 2010/03 High Energy Accelerator Research Organization (KEK) Accelerator Laboratory Assistant professor
2004/11 - 2009/03 Nagoya University Graduate School of Science Assistant professor

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