K. Usui

473 citations

12 papers · 134 indexed · h-index 5

Impact in

Nuclear and High Energy Physics top 10%
- Magnetic confinement fusion research
Aerospace Engineering top 10%
- Particle accelerators and beam dynamics

Papers in ⓘ

Nuclear and High Energy Physics 9
- Magnetic confinement fusion research 9
Aerospace Engineering 7
- Particle accelerators and beam dynamics 7

Co-authors: K. Watanabe (6 shared papers)M. Kawai (5 shared papers)K. Mogaki (7 shared papers)Y. Okumura (5 shared papers)M. Kuriyama (4 shared papers)T. Ohga (4 shared papers)L. Grisham (6 shared papers)M. Kazawa (5 shared papers)
Journals: Journal of Nuclear Science and Technology (2 papers)Review of Scientific Instruments (2 papers)Fusion Science & Technology (1 paper)IEEE Transactions on Dielectrics and Electrical Insulation (1 paper)Human Reproduction (1 paper)
Partner nations: Japan United States China

In The Last Decade

K. Usui

8 papers receiving 129 citations

Peers

Countries citing papers authored by K. Usui

Since Specialization

Citations

This map shows the geographic impact of K. Usui's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by K. Usui with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K. Usui more than expected).

Fields of papers citing papers by K. Usui

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by K. Usui. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by K. Usui. The network helps show where K. Usui may publish in the future.

Co-authors

The 25 scholars most cited alongside K. Usui, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with K. Usui Line = papers co-authored together K. Usui links everyone, so they are left out of the graph.

All Works

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12 of 12 papers shown

#	Work
1	Operation and Development of the 500-keV Negative-Ion-Based Neutral Beam Injection System for JT-60U Fusion Science & Technology ·M. Kuriyama, N. Akino, N. Ebisawa, L. Grisham, Akira Honda, Toshio Itoh, M. Kawai, M. Kazawa, K. Mogaki, Y. Ohara, T. Ohga, Y. Okumura, H. Oohara, N. Umeda, K. Usui, K. Watanabe, Masahiro Yamamoto, Takahisa Yamamoto	2002	39
2	Development of Negative-Ion Based NBI System for JT-60 Journal of Nuclear Science and Technology ·M. Kuriyama, N. Akino, N. Ebisawa, L. Grisham, Hu Liquen, Atsushi Honda, Takaò Itoh, M. Kawai, M. Kazawa, K. Mogaki, Yoshihiro Ohara, T. Ohga, K. Ohmori, Y. Okumura, H. Oohara, K. Usui, K. Watanabe	1998	30
3	Development of Negative-Ion Based NBI System for JT-60. Journal of Nuclear Science and Technology ·M. Kuriyama, N. Akino, N. Ebisawa, L. Grisham, Hu Liquen, Atsushi Honda, Takaò Itoh, M. Kawai, M. Kazawa, K. Mogaki, Yoshihiro Ohara, T. Ohga, K. Ohmori, Y. Okumura, H. Oohara, K. Usui, K. Watanabe	1998	21
4	Development of a 500 keV, 22 A D− ion source for the neutral beam injector for JT-60U Review of Scientific Instruments ·Y. Okumura, Yukio Fujiwara, Akiko Honda, Takashi Inoue, M. Kuriyama, K. Miyamoto, Naoki Miyamoto, K. Mogaki, A. Nagase, Y. Ohara, K. Usui, K. Watanabe	1996	20
5	High voltage power supply of negative-ion based NBI for JT-60U T. Ohga, K. Usui, K. Ohmori, K. Watanabe, K. Ohshima, Toshio Itoh, M. Kawai, M. Kuriyama	2002	16
6	Correlation between voltage holding capability and light emission in a 500 keV electrostatic accelerator utilized for fusion application IEEE Transactions on Dielectrics and Electrical Insulation ·Masaya Hanada, Yoshitaka Ikeda, Masaki Kamada, Katsumi Kikuchi, M. Komata, K. Mogaki, N. Umeda, K. Usui, L. Grisham, Shinichi Kobayashi	2007	4
7	Breakdown Phenomena in the Negative Ion Source of 500 keV Negative-Ion Based NBI System on JT-60U Masaya Hanada, Yoshitaka Ikeda, Masaki Kamada, Katsumi Kikuchi, M. Komata, K. Mogaki, N. Umeda, K. Usui, L. Grisham, Shinichi Kobayashi	2006	2
8	Long pulse production of high current D− ion beams in the JT-60 negative ion source Review of Scientific Instruments ·M. Hanada, Masaki Kamada, N. Akino, N. Ebisawa, Akiko Honda, M. Kawai, M. Kazawa, Kenji Kikuchi, M. Komata, K. Mogaki, K. Noto, K. Ohshima, T. Takenouchi, Y. Tanai, K. Usui, H. Yamazaki, Yoshitaka Ikeda, L. Grisham	2008	2
9	Energization Result of JT-60SA Poloidal Field Coil TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) ·Haruyuki Murakami, Katsuhiko Tsuchiya, K. Usui, Y. Kashiwa, Minoru Sato, H. Ichige, Atsushi Honda, Masahide Iguchi, K. Kawano, Yoshihiro Ônishi, K. Fukui, Kazuya Hamada, S. Davis, M. Wanner, Valerio Tomarchio, L. Zani, G. Phillips, Louzguiti ALEXANDRE	2024	0
10	Overview of first plasma operation results of the JT-60SA superconducting magnet Journal of Physics Conference Series ·Haruyuki Murakami, Katsuhiko Tsuchiya, K. Usui, Y. Kashiwa, Minoru Sato, H. Ichige, K. Kawano, Yoshihiro Ônishi, Kazuma Fukui, K. Hamada, G. Matsunaga, Koji Takahashi, (unknown), S. Davis, Manfred Wanner, Valerio Tomarchio, L. Zani, G. Phillips, Alexandre Louzguiti	2025	0
11	Development of negative ion beam accelerators for high power neutral beam systems K. Watanabe, N. Ebisawa, Yukio Fujiwara, Akiko Honda, Takashi Inoue, M. Kazawa, M. Kuriyama, K. Miyamoto, Naoki Miyamoto, K. Mogaki, A. Nagase, Y. Ohara, Y. Okumura, T. Takayasu, H. Usami, K. Usui	2002	0
12	P-419 Relevance of intravenous immunoglobulins in patients with unexplained recurrent pregnancy loss that occurred at the same gestational weeks every time Human Reproduction ·K. Usui, Hiroyuki Matsubayashi, Shigeru Saito, Yoshio Ishibashi, Aya Karino, Yasuhiro Ohara, M Doshida, Takumi Takeuchi, Takahisa Ishikawa	2024	0

About K. Usui

K. Usui is a scholar working on Nuclear and High Energy Physics, Aerospace Engineering, Electrical and Electronic Engineering, Computational Mechanics and Biomedical Engineering, having authored 12 papers that have together received 134 indexed citations. Recurring topics across this work include Magnetic confinement fusion research (9 papers), Particle accelerators and beam dynamics (7 papers), Plasma Diagnostics and Applications (7 papers), Superconducting Materials and Applications (4 papers), Ion-surface interactions and analysis (2 papers), Fusion materials and technologies (1 paper), Semiconductor materials and devices (1 paper) and Metal and Thin Film Mechanics (1 paper). The work is most often cited by research in Nuclear and High Energy Physics (93 citations), Aerospace Engineering (126 citations), Electrical and Electronic Engineering (84 citations), Biomedical Engineering (35 citations) and Materials Chemistry (22 citations). K. Usui has collaborated with scholars based in Japan, United States and China. Frequent co-authors include K. Watanabe, M. Kawai, K. Mogaki, Y. Okumura, M. Kuriyama, T. Ohga, L. Grisham, M. Kazawa, N. Ebisawa and H. Oohara. Their work appears in journals such as Journal of Nuclear Science and Technology, Review of Scientific Instruments, Fusion Science & Technology, IEEE Transactions on Dielectrics and Electrical Insulation and Human Reproduction.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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