• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

coupling between turbulent transport and magnetic topology

Research Project

Project/Area Number 15H02336
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

Ida Katsumi  核融合科学研究所, ヘリカル研究部, 教授 (00184599)

Co-Investigator(Kenkyū-buntansha) 吉沼 幹朗  核融合科学研究所, ヘリカル研究部, 助教 (20323058)
小林 達哉  核融合科学研究所, ヘリカル研究部, 助教 (30733703)
徳沢 季彦  核融合科学研究所, ヘリカル研究部, 准教授 (90311208)
Project Period (FY) 2015-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥42,900,000 (Direct Cost: ¥33,000,000、Indirect Cost: ¥9,900,000)
Fiscal Year 2019: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2016: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Fiscal Year 2015: ¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000)
Keywordsプラズマ乱流 / 磁気流体力学不安定性 / 磁場トポロジー / 乱流輸送 / プラズマ核融合 / 乱流 / プラズマ・核融合 / 磁気島 / ビーム放射分光
Outline of Final Research Achievements

In the past, research on topology changes due to MHD instability and radial transport of heat, particles, momentum, and electric current due to electrostatic fluctuation have been treated as independent research themes. Therefore, little research has been done on the combination of the two.
In the large helical device (LHD) plasma, we have studied the coupling between magnetic field topology and turbulent transport. Through this research, the coupling between "Magneto Hydro Dynamics (MHD) instability" and "anomalous transport due to plasma turbulence" was clarified.

Academic Significance and Societal Importance of the Research Achievements

磁場閉じ込めプラズマの「磁気流体力学不安定」と「プラズマ乱流による異常輸送」の二大研究分野を結ぶ、新しいプラズマ物理の研究分野を創造した点において、学術的意義が高い研究成果である。この研究成果は、磁場閉じ込めプラズマの理解に貢献し、将来の核融合の実現を加速するという点において社会的意義が大きい。

Report

(6 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (54 results)

All 2020 2019 2018 2017 2016 2015 Other

All Int'l Joint Research (8 results) Journal Article (18 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 18 results,  Open Access: 3 results,  Acknowledgement Compliant: 4 results) Presentation (28 results) (of which Int'l Joint Research: 25 results,  Invited: 17 results)

  • [Int'l Joint Research] USTC(中国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Eindhoven University(オランダ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] General Atomics(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Eindhoven University(オランダ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] USTC(中国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] General Atomics/University of Wisconsin(U.S.A.)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] General Atomics/University of Wisconsin(U.S.A.)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] General Atomics/University of Texas/Oak Ridge National Laboratory(米国)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] On the interplay between MHD instabilities and turbulent transport in magnetically confined plasmas2020

    • Author(s)
      K. Ida
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 62 Issue: 1 Pages: 014008-014008

    • DOI

      10.1088/1361-6587/ab4827

    • NAID

      120007098361

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Transition between Isotope-Mixing and Nonmixing States in Hydrogen-Deuterium Mixture Plasmas2020

    • Author(s)
      Ida K.、Nakata M.、Tanaka K.、Yoshinuma M.、Fujiwara Y.、Sakamoto R.、Motojima G.、Masuzaki S.、Kobayashi T.、Yamasaki K.
    • Journal Title

      Physical Review Letters

      Volume: 124 Issue: 2 Pages: 052002-052002

    • DOI

      10.1103/physrevlett.124.025002

    • NAID

      120007116715

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Verification of Carbon Density Profile Measurements with Charge Exchange Spectroscopy Using Hydrogen and Deuterium Neutral Beams2019

    • Author(s)
      Katsumi IDA, Mikirou YOSHINUMA, Tatsuya KOBAYASHI, Yutaka FUJIWARAJ un CHEN, Izumi MURAKAMI, Masashi KISAKI, Masaki OSAKABE and LHD Experiment Group
    • Journal Title

      Plasma and Fusion Research

      Volume: 14 Issue: 0 Pages: 1402079-1402079

    • DOI

      10.1585/pfr.14.1402079

    • NAID

      130007655815

    • ISSN
      1880-6821
    • Year and Date
      2019-04-25
    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The isotope effect on impurities and bulk ion particle transport in the Large Helical Device2019

    • Author(s)
      K. Ida, R. Sakamoto, M. Yoshinuma, K. Yamazaki, T. Kobayashi, et. al.,
    • Journal Title

      Nuclear Fusion

      Volume: 59 Issue: 5 Pages: 056029-056029

    • DOI

      10.1088/1741-4326/ab0e41

    • NAID

      120007116729

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Measurements of radial profile of hydrogen and deuterium density in isotope mixture plasmas using bulk charge exchange spectroscopy2019

    • Author(s)
      K. Ida, M. Yoshinuma, K. Yamasaki, T. Kobayashi, Y. Fujiwara, J. Chen, I. Murakami, S. Satake, Y. Yamamoto, S. Murakami, and M. Kobayash
    • Journal Title

      Review Scientific Instruments

      Volume: 90 Issue: 9 Pages: 093503-093503

    • DOI

      10.1063/1.5097030

    • NAID

      120007116723

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Summary of the 27th IAEA Fusion Energy Conference in the categories of EX/W, EX/D and ICC2019

    • Author(s)
      K. Ida
    • Journal Title

      Nuclear Fusion

      Volume: 59 Issue: 11 Pages: 117001-117001

    • DOI

      10.1088/1741-4326/ab3811

    • NAID

      120007116724

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hysteresis Relation between Turbulence and Temperature Modulation during the Heat Pulse Propagation into a Magnetic Island in DIII-D2018

    • Author(s)
      K. Ida, T. Kobayashi, M. Ono, T. E. Evans, G. R. McKee, and M. E. Austin
    • Journal Title

      Physical Review Letters

      Volume: 120 Issue: 24 Pages: 245001-245001

    • DOI

      10.1103/physrevlett.120.245001

    • NAID

      120007116716

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Exhaust of turbulence cloud at the tongue shaped deformation event2018

    • Author(s)
      K. Ida, T. Kobayashi, T. Tokuzawa, T. Akiyama, H. Tanaka, M. Yoshinuma, K. Itoh
    • Journal Title

      Nuclear Fusion

      Volume: 58 Issue: 11 Pages: 112008-112008

    • DOI

      10.1088/1741-4326/aab971

    • NAID

      120007116728

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas2018

    • Author(s)
      Ida K.、Kobayashi T.、Yoshinuma M.、Akiyama T.、Tokuzawa T.、Tsuchiya H.、Itoh K.、Itoh S.-I.
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 2804-2804

    • DOI

      10.1038/s41598-018-21128-z

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Exhaust of turbulence cloud at the tongue shaped deformation event2018

    • Author(s)
      K. Ida T. Kobayashi, T. Tokuzawa, T. Akiyama, H. Tanaka, M. Yoshinuma, K. Itoh
    • Journal Title

      Nuclear Fusion

      Volume: 58

    • NAID

      120007116728

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Internal transport barrier in tokamak and helical plasmas2017

    • Author(s)
      K. Ida, and T Fujita
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 60 Issue: 3 Pages: 033001-033001

    • DOI

      10.1088/1361-6587/aa9b03

    • NAID

      120007116713

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observation of distorted Maxwell-Boltzmann distribution of epithermal ions in LHD2017

    • Author(s)
      Ida K.、Kobayashi T.、Yoshinuma M.、Akiyama T.、Tokuzawa T.、Tsuchiya H.、Itoh K.、LHD Experiment Group
    • Journal Title

      Physics of Plasmas

      Volume: 24 Issue: 12 Pages: 122502-122502

    • DOI

      10.1063/1.4999644

    • NAID

      120007116717

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Response of plasma toroidal flow to the transition between nested and stochastic magnetic field in LHD2017

    • Author(s)
      K. Ida, M. Yoshinuma, H. Tsuchiya, T. Kobayashi, C. Suzuki, M. Yokoyama, A. Shimizu, K. Nagaoka, S. Inagaki, K. Itoh,
    • Journal Title

      Nuclear Fusion

      Volume: 57 Issue: 7 Pages: 076032-076032

    • DOI

      10.1088/1741-4326/aa6f84

    • NAID

      120007116725

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Abrupt onset of tongue deformation and phase space response of ions in magnetically-confined plasmas2016

    • Author(s)
      K. Ida, T. Kobayashi, K. Itoh, M. Yoshinuma, T. Tokuzawa, T. Akiyama, C. Moon, H. Tsuchiya, S. Inagaki and S.-I. Itoh
    • Journal Title

      Scientific Reports

      Volume: 6 Issue: 1 Pages: 36217-36217

    • DOI

      10.1038/srep36217

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Bifurcation physics of magnetic islands and stochasticity explored by heat pulse propagation studies in toroidal plasmas2016

    • Author(s)
      K. Ida, T. Kobayashi, M. Yoshinuma1, Y. Suzuki, Y. Narushima, T.E. Evans, S. Ohdachi, H. Tsuchiya, S. Inagaki and K. Itoh
    • Journal Title

      Nuclear Fusion

      Volume: 56 Issue: 9 Pages: 092001-092001

    • DOI

      10.1088/0029-5515/56/9/092001

    • NAID

      120007116726

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Helium transport in the core and stochastic edge layer in LHD2016

    • Author(s)
      K Ida, M Yoshinuma, M Goto, O Schmitz, S Dai, A Bader, M Kobayashi, G Kawamura, C Moon, Y Nakamura1 and The LHD Experiment Group
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 58 Issue: 7 Pages: 074010-074010

    • DOI

      10.1088/0741-3335/58/7/074010

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Bifurcation physics of magnetic islands and stochasticity explored by heat pulse propagation studies in toroidal plasmas2016

    • Author(s)
      K. Ida, T. Kobayashi, M. Yoshinuma, Y. Suzuki, Y. Narushima, T.E. Evans. Ohdachi, H. Tsuchiya. Inagaki, and K. Itoh
    • Journal Title

      Nuclear Fusion

      Volume: 56 Pages: 000000-000000

    • NAID

      120007116726

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Self-regulated oscillation of transport and topology of magnetic islands in toroidal plasmas2015

    • Author(s)
      K. Ida, T. Kobayashi, T. E. Evans, S. Inagaki, M. E. Austin, M. W. Shafer, S. Ohdachi, Y. Suzuki, S.-I. Itoh, K. Itoh
    • Journal Title

      Scientific Reports

      Volume: 5 Issue: 1 Pages: 161651-10

    • DOI

      10.1038/srep16165

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Overview of 3D effects on the plasma confinement and transport in magnetically confined fusion (invited) 9th International workshop on "Stochasticity in Fusion Plasmas (SFP)" titled "3D physics in stellarators and tokamaks2019

    • Author(s)
      K. Ida
    • Organizer
      9th International workshop on "Stochasticity in Fusion Plasmas (SFP)" titled "3D physics in stellarators and tokamaks"
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Characteristics of tongue-shaped deformations in hydrogen and deuterium plasmas in the Large Helical Device2019

    • Author(s)
      K. Ida
    • Organizer
      5th UNIST- Kyoto Univ. Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Turbulence spreading and turbulence exhaust in toroidal plasma2019

    • Author(s)
      K. Ida
    • Organizer
      Asia Pacific Transport Working Group (APTWG) mini workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Interplay between MHD and turbulence in plasma2019

    • Author(s)
      K. Ida
    • Organizer
      46th European Physical Society Conference on Plasma Physics (EPS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A change of parity at the MHD collapse event of tongue in magnetically confined laboratory plasma2019

    • Author(s)
      K. Ida
    • Organizer
      9th East-Asia School and Workshop on Laboratory, Space and Astrophysical Plasmas
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of isotope separating and mixing states in isotope mixture plasmas in LHD2019

    • Author(s)
      K. Ida
    • Organizer
      22nd International Stellarator/Heliotron Workshop 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of isotope separating and mixing states in isotope mixture plasmas in LHD2019

    • Author(s)
      K. Ida
    • Organizer
      17th International Workshop on H-mode Physics and Transport Barriers
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of isotope separating and mixing states in isotope mixture plasmas in LHD2019

    • Author(s)
      K. Ida
    • Organizer
      61st Annual Meeting of the APS Division of Plasma Physics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Turbulence and transport in magnetic island2019

    • Author(s)
      K. Ida
    • Organizer
      36th JSPF Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Overview of 3D effects on the plasma confinement and transport in magnetically confined fusion2019

    • Author(s)
      K.Ida
    • Organizer
      9th International workshop on Stochasticity in Fusion Plasmas
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Isotope effect on impurity and bulk ion particle transport in the Large Helical2018

    • Author(s)
      K.Ida et. al.,
    • Organizer
      27th IAEA Fusion Energy Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of distorted Maxwell-Boltzmann distribution of epithermal ions in LHD2018

    • Author(s)
      K.Ida et. al.,
    • Organizer
      9th International Symposium of Advanced Energy Science
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pioneering work before becoming mainstream research2018

    • Author(s)
      K. Ida
    • Organizer
      8th Asia-Pacific Transport Working Group (APTWG) International Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas 2018

    • Author(s)
      K. Ida, T. Kobayashi, M. Yoshinuma, T. Tokuzawa, T. Akiyama, H. Tsuchiya
    • Organizer
      4th UNIST- Kyoto Univ. Workshop on “Physics validation and control of turbulent transport and MHD in fusion plasmas"
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bifurcation physics of magnetic islands and stochasticity explored by heat pulse propagation studies in totoidal plasmas2018

    • Author(s)
      K.Ida
    • Organizer
      KSTAR conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Magnetic island and stochastic magnetic field in toroidal plasmas2017

    • Author(s)
      K.Ida
    • Organizer
      18th International RFP Workshop
    • Place of Presentation
      Kyoto Institute of Technology, Kyoto
    • Year and Date
      2017-03-26
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Interaction between resonant and non-resonant MHD: A trigger mechanism of collapse of magnetically confined plasmas2017

    • Author(s)
      K. Ida, T. Kobayashi, M. Yoshinuma, T. Tokuzawa, T. Akiyama, H. Tsuchiya, K. Itoh, & S.-I. Itoh
    • Organizer
      The 26th International Toki Conference (ITC-26) & The 11th Asia Plasma and Fusion Association Conference (APFA-11)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Modulation method as a tool to measure three dimensional magnetic field structures in toroidal plasmas2017

    • Author(s)
      K.Ida, T.Kobayashi, W.H.Ko, H.H.Lee, Y.In, H.S.Kim
    • Organizer
      59th Annual Meeting of the APS Division of Plasma Physics
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Decoupling in Transport Channels: Impurity Transport in Stellarators/Heliotrons2017

    • Author(s)
      K. Ida
    • Organizer
      21th International Stellarator-Heliotron Workshop (ISHW 2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Abrupt onset of tongue deformation in LHD plasmas2017

    • Author(s)
      K. Ida, T. Kobayashi, M. Yoshinuma, T. Tokuzawa, T. Akiyama, C. Moon, H. Tsuchiya, K. Itoh, S. Inagaki & S.-I. Itoh
    • Organizer
      1st Asia-Pacific Conference on Plasma Physics
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Exhaust of turbulence cloud at the MHD burst triggered by tongue deformation2017

    • Author(s)
      ;K. Ida, T. Kobayashi, T.Tokuzawa, T.Akiyama, M.Yoshinuma, K.Itoh
    • Organizer
      16th International Workshop on H-mode Physics and Transport Barriers
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Transition from MHD mode to tongue deformation before the collapse events in LHD2017

    • Author(s)
      K.Ida, T. Kobayashi, M.Yoshinuma, T.Akiyama, H.Tsuchiya, K. Itoh
    • Organizer
      7th Asia-Pacific Transport Working Group (APTWG) International Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Interaction between Transport MHD and energetic particle2017

    • Author(s)
      K. Ida
    • Organizer
      643rd Wilhelm and Else Heraeus Seminar on “Impact of 3D magnetic fields on hot plasmas
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Beam Spectroscopy in Plasma2016

    • Author(s)
      K.Ida, and LHD experiment group
    • Organizer
      8th Korea-Japan Diagnostic Seminar
    • Place of Presentation
      Citadines Haeundae Busan, Korea
    • Year and Date
      2016-08-24
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Explore of a magnetic topology by heat pulse propagation method2016

    • Author(s)
      Katsumi Ida
    • Organizer
      6th East-Asia School and Workshop on Laboratory, Space, Astrophysical Plasmas
    • Place of Presentation
      International Congress Center, Epochal Tsukuba, Tuskuba
    • Year and Date
      2016-07-11
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Bifurcation physics of a magnetic island and its stochastization in totoidal plasmas2016

    • Author(s)
      K.Ida, T.Kobayashi, T.E.Evans, H. Tsuchiya, S. Inagaki, K. Itoh, M. Yoshinuma, Y. Suzuki, S. Ohdachi
    • Organizer
      6th Asia Pacific Transport Working Group
    • Place of Presentation
      Korea University Seoul Korea
    • Year and Date
      2016-06-21
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] トロイダルプラズマの磁気島における輸送とトポロジーの自励振動2015

    • Author(s)
      居田克巳、小林達哉、稲垣滋、トッド・エバンス
    • Organizer
      閉じ込め・輸送研究会
    • Place of Presentation
      核融合科学研究所・土岐
    • Year and Date
      2015-12-07
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Physics of magnetic reconnection, magnetic islands and stochasticity in fusion plasmas2015

    • Author(s)
      K.Ida, T.Tokuzawa, T.Kobayashi, S.Inagaki, K.Itoh
    • Organizer
      597th Wilhelm and Else Heraeus Seminar on ”Stochasticity in Fusion Plasmas”
    • Place of Presentation
      Physikzentrum Bad Honnef, Germany
    • Year and Date
      2015-09-10
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited

URL: 

Published: 2015-04-16   Modified: 2022-11-04  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi