World's Best Scientists 2026 revealed!
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Engineering and Technology
Japan
2025

D-Index & Metrics

Engineering and Technology

D-Index
66
Citations
15035
World Ranking
1431
National Ranking
11

Katsumi Ida publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where Katsumi Ida sits on this spectrum.

38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 135 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 118 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 60 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38 publications 804+

This scientist: 827 publications — 99th percentile

99% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

Katsumi Ida D-index placement in Engineering and Technology in 2026

The chart shows the D-index (discipline H-index) distribution of Engineering and Technology scientists ranked by Research.com in 2026. The highlighted bar marks where Katsumi Ida sits on this spectrum.

30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 129 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 348 scientists 41 D-Index: 362 scientists 42 D-Index: 426 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 95 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 25 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 66 D-Index — 86th percentile

86% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

Research.com Recognitions

  • 2025 - Research.com Engineering and Technology in Japan Leader Award

Overview

What is he best known for?

The fields of study he is best known for:

  • Electron
  • Plasma
  • Optics

His scientific interests lie mostly in Atomic physics, Plasma, Large Helical Device, Tokamak and Electron. Katsumi Ida interconnects Electron temperature, Magnetohydrodynamics, Magnetic confinement fusion, Neutral beam injection and Beta in the investigation of issues within Atomic physics. Plasma connects with themes related to Beam in his study.

The various areas that Katsumi Ida examines in his Large Helical Device study include Magnetic flux, Convection, Nuclear magnetic resonance and Scaling. His work is dedicated to discovering how Tokamak, Pinch are connected with Plasma diagnostics and other disciplines. His study in the field of Ambipolar diffusion also crosses realms of Doppler effect.

His most cited work include:

  • Identification of zonal flows in a toroidal plasma. (271 citations)
  • Edge electric-field profiles of H-mode plasmas in the JFT-2M tokamak. (248 citations)
  • Overview of the large helical device project (217 citations)

What are the main themes of his work throughout his whole career to date?

Plasma, Atomic physics, Large Helical Device, Tokamak and Electron are his primary areas of study. His study in the fields of Toroid, Electron temperature, Electron density and Divertor under the domain of Plasma overlaps with other disciplines such as Maple. His Atomic physics study incorporates themes from Cyclotron, Beam, Magnetohydrodynamics, Magnetic confinement fusion and Neutral beam injection.

His Large Helical Device research integrates issues from Computational physics, Optics, Plasma diagnostics, Condensed matter physics and Beta. His Tokamak study combines topics from a wide range of disciplines, such as Turbulence and Stellarator. His studies in Electron integrate themes in fields like Thermal diffusivity and Collisionality.

He most often published in these fields:

  • Plasma (68.66%)
  • Atomic physics (61.51%)
  • Large Helical Device (39.33%)

What were the highlights of his more recent work (between 2015-2021)?

  • Plasma (68.66%)
  • Atomic physics (61.51%)
  • Large Helical Device (39.33%)

In recent papers he was focusing on the following fields of study:

Katsumi Ida mostly deals with Plasma, Atomic physics, Large Helical Device, Electron and Mechanics. His work carried out in the field of Plasma brings together such families of science as Deuterium, Kinetic isotope effect and Turbulence. His Turbulence research is multidisciplinary, incorporating elements of Electron temperature, Tokamak, Curvature and Condensed matter physics.

His work on Helium as part of general Atomic physics study is frequently linked to Spectroscopy, bridging the gap between disciplines. His work deals with themes such as Computational physics, Beam, Neutral beam injection, Analytical chemistry and Electron density, which intersect with Large Helical Device. His work investigates the relationship between Electron and topics such as Thermal transport that intersect with problems in Transient.

Between 2015 and 2021, his most popular works were:

  • Major results from the first plasma campaign of the Wendelstein 7-X stellarator (83 citations)
  • Overview of first Wendelstein 7-X high-performance operation (71 citations)
  • Extension of the operational regime of the LHD towards a deuterium experiment (61 citations)

In his most recent research, the most cited papers focused on:

  • Electron
  • Optics
  • Plasma

The scientist’s investigation covers issues in Plasma, Atomic physics, Large Helical Device, Deuterium and Turbulence. His Plasma study combines topics in areas such as Condensed matter physics and Kinetic isotope effect. The study incorporates disciplines such as Thermal diffusivity, Electron, Transport barrier and Collisionality in addition to Atomic physics.

Much of his study explores Large Helical Device relationship to Neutral beam injection. His studies examine the connections between Deuterium and genetics, as well as such issues in Electron density, with regards to Isotope, Beam and Particle. His research in Toroid intersects with topics in Electron temperature, Modulation and Lissajous curve.

Best Publications

  • Edge electric-field profiles of H-mode plasmas in the JFT-2M tokamak.

    Ida K;Hidekuma S;Miura Y;Fujita T

  • Overview of the large helical device project

    A. Iiyoshi;A. Komori;A. Ejiri;M. Emoto

  • Experimental studies of the physical mechanism determining the radial electric field and its radial structure in a toroidal plasma

    Katsumi Ida

  • Electron thermal transport barrier and density fluctuation reduction in a toroidal helical plasma

    A. Fujisawa;H. Iguchi;T. Minami;Y. Yoshimura

  • Initial physics achievements of large helical device experiments

    O. Motojima;H. Yamada;A. Komori;N. Ohyabu

  • Overview of first Wendelstein 7-X high-performance operation

    T. Klinger;T. Klinger;T. Andreeva;S. Bozhenkov;C. Brandt

  • Major results from the first plasma campaign of the Wendelstein 7-X stellarator

    R.C. Wolf;A. Ali;A. Alonso;J. Baldzuhn

  • Observation of plasma flow at the magnetic island in the large helical device.

    K. Ida;N. Ohyabu;T. Morisaki;Y. Nagayama

  • Goal and Achievements of Large Helical Device Project

    A. Komori;H. Yamada;S. Imagawa;O. Kaneko

  • Characteristics of electron heat transport of plasma with an electron internal-transport barrier in the large helical device.

    K. Ida;T. Shimozuma;H. Funaba;K. Narihara

  • Extension of the operational regime of the LHD towards a deuterium experiment

    Y. Takeiri;Y. Takeiri;T. Morisaki;T. Morisaki;M. Osakabe;M. Osakabe;M. Yokoyama;M. Yokoyama

  • Core electron-root confinement (CERC) in helical plasmas

    M. Yokoyama;H. Maassberg;C. D. Beidler;V. Tribaldos

  • Spatiotemporal structures of edge limit-cycle oscillation before L-to-H transition in the JFT-2M tokamak.

    T. Kobayashi;K. Itoh;T. Ido;K. Kamiya

  • Configuration flexibility and extended regimes in Large Helical Device

    H Yamada;A Komori;N Ohyabu;O Kaneko

  • Neoclassical plasma viscosity and transport processes in non-axisymmetric tori

    K.C. Shaing;K. Ida;S.A. Sabbagh

  • Energetic ion driven MHD instabilities observed in the heliotron/torsatron devices Compact Helical System and Large Helical Device

    K. Toi;K. Toi;M. Takechi;M. Isobe;N. Nakajima

  • Observation of an impurity hole in a plasma with an ion internal transport barrier in the Large Helical Device

    K. Ida;M. Yoshinuma;M. Osakabe;K. Nagaoka

  • Observation of reduced heat transport inside the magnetic island O point in the large helical device.

    S. Inagaki;N. Tamura;K. Ida;Y. Nagayama

  • Space‐ and time‐resolved measurements of ion temperature with the CVI 5292‐Å charge‐exchange recombination line after subtracting background radiation

    K. Ida;S. Hidekuma

  • Charge-Exchange Spectroscopy with Pitch-Controlled Double-Slit Fiber Bundle on LHD

    M. Yoshinuma;K. Ida;M. Yokoyama;M. Osakabe

  • Edge poloidal rotation profiles of H-mode plasmas in the JFT-2M tokamak

    K. Ida;S. Hidekuma;M. Kojima;Y. Miura

  • Rotation and momentum transport in tokamaks and helical systems

    K. Ida;J.E. Rice

  • Formation of electron internal transport barriers by highly localized electron cyclotron resonance heating in the large helical device

    T Shimozuma;S Kubo;H Idei;Y Yoshimura

  • An Overview of the Large Helical Device Project

    A. "Iiyoshi;A. Komori;A. Ejiri;M. Emoto

Frequent Co-Authors

Satoshi Morita
Satoshi Morita Kyoto University
Ken Matsuoka
Ken Matsuoka Kyushu University

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