N. Umeda

1.8k total citations
80 papers, 733 citations indexed

About

N. Umeda is a scholar working on Aerospace Engineering, Nuclear and High Energy Physics and Electrical and Electronic Engineering. According to data from OpenAlex, N. Umeda has authored 80 papers receiving a total of 733 indexed citations (citations by other indexed papers that have themselves been cited), including 74 papers in Aerospace Engineering, 54 papers in Nuclear and High Energy Physics and 51 papers in Electrical and Electronic Engineering. Recurrent topics in N. Umeda's work include Particle accelerators and beam dynamics (72 papers), Magnetic confinement fusion research (53 papers) and Plasma Diagnostics and Applications (35 papers). N. Umeda is often cited by papers focused on Particle accelerators and beam dynamics (72 papers), Magnetic confinement fusion research (53 papers) and Plasma Diagnostics and Applications (35 papers). N. Umeda collaborates with scholars based in Japan, United States and France. N. Umeda's co-authors include M. Kashiwagi, K. Watanabe, H. Tobari, M. Taniguchi, M. Hanada, Takashi Inoue, L. Grisham, M. Dairaku, A. Kojima and Minoru Takahashi and has published in prestigious journals such as Review of Scientific Instruments, Nuclear Fusion and IEEE Transactions on Dielectrics and Electrical Insulation.

In The Last Decade

N. Umeda

77 papers receiving 685 citations

Peers

Countries citing papers authored by N. Umeda

Since Specialization

Citations

This map shows the geographic impact of N. Umeda'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 N. Umeda with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites N. Umeda more than expected).

Fields of papers citing papers by N. Umeda

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by N. Umeda. 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 N. Umeda. The network helps show where N. Umeda may publish in the future.

Co-authorship network of co-authors of N. Umeda

This figure shows the co-authorship network connecting the top 25 collaborators of N. Umeda. A scholar is included among the top collaborators of N. Umeda based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with N. Umeda. N. Umeda is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Achievement of stable negative ion production with Cs-seeded for long pulse beam operation in the prototype of Cs-seeded negative ion source for JT-60SA 2020 ·Review of Scientific Instruments ·Masahiro Ichikawa, A. Kojima, J. Hiratsuka, M. Yoshida, N. Umeda, (unknown), K. Watanabe, H. Tobari, M. Kashiwagi	5
2	Experimental investigation of the Cs behavior in the cesiated H− ion source during high power long beam operation 2020 ·Review of Scientific Instruments ·(unknown), J. Hiratsuka, Masahiro Ichikawa, N. Umeda, A. Kojima, K. Watanabe, H. Tobari, M. Kashiwagi	2
3	Achievement of high power and long pulse negative ion beam acceleration for JT-60SA NBI 2020 ·Review of Scientific Instruments ·J. Hiratsuka, M. Kashiwagi, Masahiro Ichikawa, N. Umeda, (unknown), H. Tobari, K. Watanabe, A. Kojima, M. Yoshida	13
4	Progress on design and manufacturing of dc ultra-high voltage component for ITER NBI 2017 ·Fusion Engineering and Design ·H. Tobari, M. Kashiwagi, K. Watanabe, Tetsuya Maejima, A. Kojima, N. Umeda, M. Dairaku, (unknown), H. Yamanaka	4
5	Investigation of Oxygen-Induced-Arcing in Cs-Seeded Negative Ion Source 2016 ·Plasma and Fusion Research ·Masahiro Ichikawa, M. Yoshida, A. Kojima, (unknown), M. Kashiwagi, K. Watanabe, N. Umeda, H. Tobari, (unknown), J. Hiratsuka, (unknown)	4
6	Time evolution of negative ion profile in a large cesiated negative ion source applicable to fusion reactors 2015 ·Review of Scientific Instruments ·M. Yoshida, M. Hanada, Akira Kojima, M. Kashiwagi, N. Umeda, J. Hiratsuka, Masahiro Ichikawa, K. Watanabe, L. Grisham, K. Tsumori, M. Kisaki	12
7	Development of negative ion extractor in the high-power and long-pulse negative ion source for fusion application 2014 ·Review of Scientific Instruments ·M. Kashiwagi, N. Umeda, H. Tobari, A. Kojima, M. Yoshida, M. Taniguchi, M. Dairaku, Tetsuya Maejima, H. Yamanaka, K. Watanabe, Takashi Inoue, M. Hanada	22
8	Compensations of beamlet deflections for 1 MeV accelerator of ITER NBI 2013 ·AIP conference proceedings ·M. Kashiwagi, M. Taniguchi, N. Umeda, M. Dairaku, H. Tobari, H. Yamanaka, (unknown), Takashi Inoue, H.P.L. de Esch, L. Grisham, D. Boilson, R. Hemsworth, Masanobu Tanaka	11
9	Long-pulse production of the negative ion beams for JT-60SA 2013 ·Fusion Engineering and Design ·Akira Kojima, M. Hanada, M. Yoshida, Takashi Inoue, K. Watanabe, M. Taniguchi, M. Kashiwagi, N. Umeda, H. Tobari, L. Grisham	5
10	Analysis of electron temperature distribution by Kinetic modeling of electron energy distribution function in JAEA 10 ampere negative ion source 2013 ·AIP conference proceedings ·Takemasa Shibata, (unknown), M. Kashiwagi, Takashi Inoue, M. Dairaku, M. Taniguchi, H. Tobari, N. Umeda, K. Watanabe, (unknown), A. Hatayama	7
11	Voltage holding study of 1 MeV accelerator for ITER neutral beam injector 2012 ·Review of Scientific Instruments ·M. Taniguchi, M. Kashiwagi, N. Umeda, M. Dairaku, (unknown), H. Tobari, Koji Tsuchida, H. Yamanaka, K. Watanabe, A. Kojima, M. Hanada, K. Sakamoto, Takashi Inoue	14
12	Design of a −1 MV dc UHV power supply for ITER NBI 2009 ·Nuclear Fusion ·K. Watanabe, Masahiro Yamamoto, (unknown), Yasuo Yamashita, M. Dairaku, M. Kashiwagi, M. Taniguchi, H. Tobari, N. Umeda, K. Sakamoto, Takashi Inoue	25
13	Compensation of beamlet repulsion in a large negative ion source with a multi aperture accelerator 2009 ·AIP conference proceedings ·M. Kashiwagi, Takashi Inoue, L. R. Grisham, M. Hanada, Masaki Kamada, M. Taniguchi, N. Umeda, K. Watanabe, Elizabeth Surrey, Alain Simonin	6
14	Development of 1 MeV H[sup −] Accelerator at JAEA for ITER NB 2009 ·AIP conference proceedings ·M. Taniguchi, H.P.L. de Esch, Lennart Svensson, N. Umeda, M. Kashiwagi, Kouji Watanabe, H. Tobari, M. Dairaku, Keisuke Sakamoto, Teruo Inoue, Elizabeth Surrey, Alain Simonin	10
15	Acceleration of ampere class H− ion beam by MeV accelerator 2008 ·Review of Scientific Instruments ·M. Taniguchi, Takashi Inoue, N. Umeda, M. Kashiwagi, K. Watanabe, H. Tobari, M. Dairaku, K. Sakamoto	11
16	R&D progress at JAEA towards production of high power and large-area negative ion beams for ITER 2007 ·Nuclear Fusion ·M. Hanada, Takashi Inoue, M. Kashiwagi, M. Taniguchi, H. Tobari, K. Watanabe, N. Umeda, M. Dairaku, Yoshitaka Ikeda, K. Sakamoto	3
17	Production of High Power and Large-Area Negative Ion Beams for ITER 2006 ·M. Hanada, Takashi Inoue, M. Kashiwagi, M. Taniguchi, H. Tobari, K. Watanabe, N. Umeda, M. Dairaku, (unknown), K. Sakamoto	1
18	Recent progress of negative ion based neutral beam injector for JT-60U 2005 ·Fusion Engineering and Design ·N. Umeda, T. Yamamoto, M. Hanada, L. Grisham, M. Kawai, T. Ohga, N. Akino, Takashi Inoue, M. Kazawa, Kenji Kikuchi, K. Mogaki, (unknown), K. Watanabe, Y. Ikeda	6
19	Experimental Validation of Beam Particle Self Interaction in JT-60U by Use of N-NB 2005 ·Journal of Plasma and Fusion Research ·Kunihiko Okano, T. Suzuki, N. Umeda, Ryoji Hiwatari, K. Masaki, K. Tobita, Takao Fujita	1
20	Improvement of JT-60U negative ion source performance 2001 ·Nuclear Fusion ·L. Grisham, M. Kuriyama, M. Kawai, Toshio Itoh, N. Umeda, (unknown)	9

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