Hiroki Hasegawa

Profile Information

Affiliation: Assistant Professor, Meta-hierarchy Dynamics Unit, Department of Research, National Institute for Fusion Science
: Assistant Professor, Fusion Science Program, Department of Advanced Studies, Graduate Institute for Advanced Studies, The Graduate University for Advanced Studies, SOKENDAI

Degree: Ph. D in Science(Nagoya University)
Master of Science(Nagoya University)

J-GLOBAL ID: 200901041190988666
researchmap Member ID: 1000368794

External link: https://unit.nifs.ac.jp/research/en/theme_eng/unit01_eng?paper=unit01

I am studying topics about the multi-hierarchy simulation of magnetic confinement fusion or other plasmas phenomena. In plasmas, we find the microscopic phenomena by particle motions, etc., and the macroscopic (hydrodynamic) phenomena as collective behavior. In order to understand complex processes in plasma phenomena, we have to investigate dynamics between microscopic and macroscopic hierarchies. Multi-Hierarchy Simulation is one of the methods for the investigation. Particularly, I now study multi-hierarchy dynamics on non-diffusive radial plasma transport (called blob and hole) and detached plasmas in fusion boundary layer plasmas. Furthermore, I promote cross-disciplinary studies through the simulation science.

Research Interests

Research Areas

Research History

Apr, 2023 - Present

Assistant Professor, Fusion Science Program, Department of Advanced Studies, Graduate Institute for Advanced Studies, The Graduate University for Advanced Studies, SOKENDAI
Apr, 2023 - Present

Assistant Professor, Meta-hierarchy Dynamics Unit, Department of Research, National Institute for Fusion Science
Apr, 2013 - Mar, 2023

Assistant Professor, Department of Fusion Science, School of Physical Sciences, The Graduate University for Advanced Studies, SOKENDAI
May, 2010 - Mar, 2023

Assistant Professor, Fundamental Physics Simulation Research Division, Department of Helical Plasma Research, National Institute for Fusion Science
Apr, 2009 - Apr, 2010

Scientist, Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology
Jun, 2005 - Mar, 2009

Scientist, The Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology
Apr, 2004 - Jun, 2005

Postdoctoral Fellow, Theory and Computer Simulation Center, National Institute for Fusion Science

Education

Apr, 2001 - Mar, 2004

Division of Particle and Astrophysical Science (Doctoral Program), Graduate School of Science, Nagoya University
Apr, 1999 - Mar, 2001

Division of Particle and Astrophysical Science (Master's Program), Graduate School of Science, Nagoya University
Apr, 1995 - Mar, 1999

Department of Physics, School of Science, Nagoya University

Committee Memberships

Major Papers

High heat flux reduction to materials using current filaments

Trang Le, Yasuhiro Suzuki, Hiroki Hasegawa, Toseo Moritaka, Hiroaki Ohtani

Scientific Reports, 13(1) 8300-1-8300-9, May 23, 2023 Peer-reviewed
Linear analysis of cross-field dynamics with feedback instability on detached divertor plasmas

Hiroki Hasegawa, Hirohiko Tanaka, Seiji Ishiguro

Nuclear Fusion, 61(12) 126005-1-126005-8, Oct 20, 2021 Peer-reviewedLead authorCorresponding author
Three-dimensional effect of particle motion on plasma filament dynamics

Hiroki Hasegawa, Seiji Ishiguro

Physics of Plasmas, 26(6) 062104-1-062104-5, Jun 4, 2019 Peer-reviewedLead authorCorresponding author
Ion Inertial Effects on Three-dimensional Filament Dynamics

Hiroki Hasegawa, Seiji Ishiguro

Preprints of 27th IAEA Fusion Energy Conference, TH/P7-12, Oct, 2018 Peer-reviewedLead authorCorresponding author
Microscopic Effect on Filamentary Coherent Structure Dynamics in Boundary Layer Plasmas

Hiroki Hasegawa, Seiji Ishiguro

Plasma, 1 61-67, Mar 22, 2018 Peer-reviewedLead authorCorresponding author
Development and Verification of the Three-dimensional Electrostatic Particle Simulation Code for the Study of Blob and Hole Propagation Dynamics

Hiroki Hasegawa, Seiji Ishiguro

Plasma and Fusion Research, 12 1401044-1-1401044-9, Nov 13, 2017 Peer-reviewedInvitedLead authorCorresponding author
Impurity transport caused by blob and hole propagations

Hiroki Hasegawa, Seiji Ishiguro

Nuclear Fusion, 57(11) 116008-1-116008-8, Aug 1, 2017 Peer-reviewedLead authorCorresponding author
Study of self-consistent particle flows in a plasma blob with particle-in-cell simulations

Hiroki Hasegawa, Seiji Ishiguro

Physics of Plasmas, 22(10) 102113-1-102113-8, Oct 21, 2015 Peer-reviewedLead authorCorresponding author
Response of the Magnetosphere to Microscopic Effects in Auroral Arc Formation

Hiroki Hasegawa, Nobuaki Ohno, Tetsuya Sato

Plasma and Fusion Research, 6 2401128-1-2401128-4, Aug 26, 2011 Peer-reviewedLead authorCorresponding author
Simulation of feedback instability in the coupled magnetosphere-ionosphere system

Hiroki Hasegawa, Nobuaki Ohno, Tetsuya Sato

Journal of Geophysical Research: Space Physics, 115(8) A08304-1-A08304-10, Aug 4, 2010 Peer-reviewedLead authorCorresponding author
Improved Open Boundary Model for Plasma Particle Simulations

Hiroki Hasegawa, Tetsuya Sato

Plasma and Fusion Research, 5 020-1-020-7, Jun 4, 2010 Peer-reviewedLead authorCorresponding author
Macro-micro interlocked simulation algorithm: An exemplification for aurora arc evolution

Tetsuya Sato, Hiroki Hasegawa, Nobuaki Ohno

Computational Science and Discovery, 2(1) 015007-1-015007-9, Dec 11, 2009 Peer-reviewed
Particle acceleration by a large-amplitude wave associated with an ion beam in a magnetized plasma

Hiroki Hasegawa, Seiji Ishiguro, Masao Okamoto

Journal of Plasma Physics, 72(6) 941-944, Dec 20, 2006 Peer-reviewedLead authorCorresponding author
Development of the Efficient Electromagnetic Particle Simulation Code with High Performance Fortran on a Vector-Parallel Supercomputer

Hiroki Hasegawa, Seiji Ishiguro, Masao Okamoto

IPSJ Transactions on Advanced Computing Systems, 46(No.SIG16 (ACS12)) 144-152, Dec 15, 2005 Peer-reviewedLead authorCorresponding author
Persistent acceleration of positrons in a nonstationary shock wave

H Hasegawa, K Kato, Y Ohsawa

Physics of Plasmas, 12(8) 082306-1-082306-6, Aug 12, 2005 Peer-reviewedLead author
Position acceleration to ultrarelativistic energies by an oblique magnetosonic shock wave in an electron-positron-ion plasma

H Hasegawa, Y Ohsawa

Physics of Plasmas, 12(1) 012312-1-012312-7, Dec 14, 2004 Peer-reviewedLead author
Low-frequency oblique waves in magnetized electron-positron-ion plasmas

Hiroki Hasegawa, Yukiharu Ohsawa

Journal of the Physical Society of Japan, 73(7) 1764-1774, Jul, 2004 Peer-reviewedLead author
Magnetohydrodynamic Waves and Positron Acceleration in an Electron-Positron-Ion Plasma

Hiroki Hasegawa

Doctoral Thesis (Nagoya University), Mar, 2004 Lead authorCorresponding author
Positron acceleration to ultrarelativistic energies by a shock wave in a magnetized electron-positron-ion plasma

H Hasegawa, S Usami, Y Ohsawa

Physics of Plasmas, 10(9) 3455-3458, Aug 21, 2003 Peer-reviewedLead author
Perpendicular nonlinear waves in an electron-positron-ion plasma

Hiroki Hasegawa, Shinsuke Irie, Shunsuke Usami, Yukiharu Ohsawa

Physics of Plasmas, 9(6) 2549-2561, May 21, 2002 Peer-reviewedLead author

Books and Other Publications

Plasma Simulation - for revealing multi-scale complex phenomena -

The Japan Society of Plasma Science and Nuclear Fusion Research (ed.), Fumimichi Sano (supervision), Yasuaki Kishimoto, Ritoku Horiuchi, Seiji Ishiguro, Hideo Sugama, Masatoshi Yagi, Kenji Imadera, Hideo Nagatomo, Hiroshi Naitou, Tomohiko Watanabe, Hideaki Miura, Yasushi Todo, Tomonori Takizuka, Atsushi Fukuyama, Hiroki Hasegawa, Atsushi M. Ito (Role: Contributor, 7.3.2 Aurora Simulation)

Kyoto University Press, Dec 20, 2018 (ISBN: 9784814001835)

Major Misc.

Project Review: Numerical Simulation Reactor Research Project at the National Institute for Fusion Science 3. Progress in Simulation Study of Fundamental Physics and Visualization Technology 3.1 Simulation Study of Fundamental Physics

Seiji ISHIGURO, Atsushi ITO, Shunsuke USAMI, Hiroaki OHTANI, Hitoshi SAKAGAMI, Mieko TOIDA, Hiroki HASEGAWA, Toseo MORITAKA, Ritoku HORIUCHI, Hideaki MIURA

Journal of plasma and fusion research, 96(10) 614-626, Oct, 2020
Project Review: Simulation Research Projects Using the High-Performance Computer System Helios at IFERC-CSC

Edited by QST BA Project Planning and Coordination Group, IFERC Project Team, IFERC-CSC Home Team

Journal of Plasma and Fusion Research, 95(2) 57-98, Feb, 2019
Project Review: Numerical Simulation Reactor Research Project at the National Institute for Fusion Science3. Sophistication of Computational Science and Fundamental Physics Simulations

Seiji Ishiguro, Atsushi Ito, Shunsuke Usami, Hiroaki Ohtani, Hitoshi Sakagami, Mieko Toida, Hiroki Hasegawa, Ritoku Horiuchi, Hideaki Miura

Journal of Plasma and Fusion Research, 92(11) 821-830, Nov, 2016
Special Topic Articles: Space Climatology 1. Preface

Kanya Kusano, Hiroki Hasegawa

Journal of Plasma and Fusion Research, 90(2) 105-106, Feb, 2014 Invited
Holistic Simulation of Auroral Arc Formation

Hiroki Hasegawa, Nobuaki Ohno, Tetsuya Sato

Nagare (Journal of Japan Society of Fluid Mechanics), 30(5), Oct, 2011 Invited
Column: Create an aurora in a computer

Kanya Kusano, Nobuaki Ohno, Hiroki Hasegawa

Mathematical Sciences, 46(1) 50-51, Jan, 2008

Major Presentations

122

Analysis of plasma particle orbits in boundary layers with the efficient electrostatic particle-in-cell simulation code

Hiroki Hasegawa, Seiji Ishiguro

42nd JSST Annual Conference: International Conference on Simulation Technology (JSST2023), Aug 29, 2023, Japan Society for Simulation Technology
Three-Dimensional Particle-in-Cell Simulations for Study of Filamentary Plasma Structure Formations

Hiroki Hasegawa, Seiji Ishiguro

31st International Toki Conference on Plasma and Fusion Research (ITC31), Nov 9, 2022, National Institute for Fusion Science, National Institutes of Natural Sciences
Improvement of the efficient electrostatic plasma particle simulation code for the investigation of boundary layer plasmas

Hiroki Hasegawa, Seiji Ishiguro

41st JSST Annual Conference: International Conference on Simulation Technology (JSST2022), Sep 1, 2022, Japan Society for Simulation Technology
Macro-Micro Interlocked Simulations and Drastic Change Phenomena

Hiroki Hasegawa

The Symposium on Hierarchy and Holism in Natural Sciences, Jan 6, 2022, National Institutes of Natural Sciences Invited
3D-PIC simulation for a filamentary plasma structure ended by tilted plates

Hiroki HASEGAWA, Seiji ISHIGURO

30th International Toki Conference on Plasma and Fusion Research (ITC30), Nov 16, 2021, National Institute for Fusion Science, National Institutes of Natural Sciences
Development of the efficient electrostatic plasma particle simulation code for the study of fusion boundary layer plasmas

Hiroki Hasegawa, Seiji Ishiguro

40th JSST Annual Conference: International Conference on Simulation Technology (JSST2021), Sep 1, 2021, Japan Society for Simulation Technology
Linear Analysis of Cross-field Dynamics with Feedback Instability on Detached Divertor Plasmas

Hiroki Hasegawa, Hirohiko Tanaka, Seiji Ishiguro

28th IAEA Fusion Energy Conference (IAEA-FEC 2020), May 12, 2021, International Atomic Energy Agency (IAEA)
Particle-in-Cell Plasma Simulation of Filamentary Coherent Structures

Seiji Ishiguro, Hiroki Hasegawa

31st Workshop on Sustained Simulation Performance (WSSP), Mar 17, 2021, Cyberscience Center at Tohoku University, High Performance Computing Center Stuttgart (HLRS), and NEC Corporation Invited
Three-dimensional Kinetic Effects on Plasma Filament Dynamics

Hiroki Hasegawa, Seiji Ishiguro

24th International Conference on Plasma Surface Interaction in Fusion Devices (PSI-24), Jan 26, 2021, KOREA NUCLEAR SOCIETY
Study of Detached Plasma Dynamics with Coupling Model between Magnetized Plasmas Characterized by Different Current Mechanisms

Hiroki Hasegawa, Hirohiko Tanaka, Seiji Ishiguro

17th International Workshop on Plasma Edge Theory in Fusion Devices (PET17), Aug 19, 2019, University of California, San Diego (UCSD)
Multi-Hierarchy Physics Simulations in Plasma Science - Aurora and Boundary Layer in Fusion Plasma -

Hiroki Hasegawa

The Symposium on Hierarchy and Holism in Natural Sciences, Jan 10, 2019, National Institutes of Natural Sciences Invited
Ion Inertial Effects on Three-dimensional Filament Dynamics

Hiroki Hasegawa, Seiji Ishiguro

27th IAEA Fusion Energy Conference (IAEA-FEC), Oct 22, 2018, The International Atomic Energy Agency (IAEA)
Impurity Ion Transport by Filamentary Plasma Structures

Hiroki Hasegawa, Seiji Ishiguro

23rd International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI-23), Jun 17, 2018, Princeton University and Princeton Plasma Physics Laboratory (PPPL)
Investigation of Multiscale Dynamics on Coherent Structure in Peripheral Plasmas

Hiroki Hasegawa, Seiji Ishiguro

US-Japan Joint Institute for Fusion Theory Workshop on Multiscale Methods in Plasma Physics, Aug 22, 2017, University of Colorado Boulder
Particle-in-cell simulation of non-diffusive plasma transport in scrape-off layer

Hiroki Hasegawa, Seiji Ishiguro

7th Asia Pacific Transport Working Group International Conference (APTWG2017), Jun 5, 2017, Nagoya University
Progress of Study of Microscopic Dynamics in Plasma Coherent Structures

Hiroki Hasegawa, Seiji Ishiguro

33th Annual Meeting of the Japan Society of Plasma Science and Nuclear Fusion Research, Nov 29, 2016, The Japan Society of Plasma Science and Nuclear Fusion Research Invited
Configuration of Self-consistent Flows in a Hole Structure

Hiroki Hasegawa, Seiji Ishiguro

58th Annual Meeting of the APS (American Physical Society) Division of Plasma Physics, Nov 3, 2016, The American Physical Society
Impurity Transport Caused by Blob and Hole Propagations

Hiroki Hasegawa, Seiji Ishiguro

26th IAEA Fusion Energy Conference (IAEA-FEC 2016), Oct 20, 2016, International Atomic Energy Agency (IAEA)
Kinetic Physics in Peripheral Plasmas - Blobs and Detachments

Seiji Ishiguro, Hiroki Hasegawa, Theerasarn Pianpani

10th West Lake International Symposium on Magnetic Fusion and 12th Asia Pacific Plasma Theory Conference, May, 2016 Invited
Response of magnetosphere to microscopic effects in auroral arcs formation

Hiroki Hasegawa, Nobuaki Ohno, Tetsuya Sato

20th International Toki Conference on the Next Twenty Years in Plasma and Fusion Science, Dec 10, 2010, National Institute for Fusion Science, National Institutes of Natural Sciences

Professional Memberships

Jul, 2000 - Present

The Physical Society of Japan
Feb, 2007 - Present

Japan Geoscience Union
Jun, 2010 - Present

The Japan Society of Plasma Science and Nuclear Fusion Research
Jun, 2023 - Present

Japan Society for Simulation Technology

Research Projects

Investigation of Radial Dynamics on Detached Divertor Plasma with Coupling Model between Magnetized Plasmas Characterized by Different Current Mechanisms

Grants-in-Aid for Scientific Research (KAKENHI) (C), Japan Society for the Promotion of Science, Apr, 2019 - Mar, 2024

Hiroki Hasegawa, Hirohiko Tanaka
Research, Development, and Application of Real Particle Simulations for Plasma Interdisciplinary Science

Joint Usage/Research Center for Interdisciplinary Large-scale Information Infrastructures: Joint Research Projects (General Joint Research Projects), Joint Usage/Research Center for Interdisciplinary Large-scale Information Infrastructures (JHPCN), Apr, 2023

Hiroaki Ohtani, Shunsuke Usami, Hiroki Hasegawa, Toseo Moritaka, Masanori Nunami, Mieko Toida, Hideaki Miura, Seiji Ishiguro, Ritoku Horiuchi, Nobuaki Ohno, Shintaro Kawahara, Hideyuki Usui, Yohei Miyake, Mitsue Den, Tomoya Ogawa, Keiichiro Fukazawa, Takahiro Katagiri, Hiroyuki Takizawa
Development of massively parallelized particle simulation code for fusion plasma research and visualization of the simulation results

Joint Usage/Research Center for Interdisciplinary Large-scale Information Infrastructures: Joint Research Projects (General Joint Research Projects), Joint Usage/Research Center for Interdisciplinary Large-scale Information Infrastructures (JHPCN), Apr, 2015 - Mar, 2023

Hiroaki Ohtani
Evolution of Fusion Plasma Research with Macro-Micro Interlocked Simulation Model

Grants-in-Aid for Scientific Research (KAKENHI) (Grant-in-Aid for Young Scientists (B)), Japan Society for the Promotion of Science, Apr, 2011 - Mar, 2016

Hiroki Hasegawa
Investigation of Multi-Physics Plasma Dynamics with Macro-Micro Interlocked Simulation

Grant-in-Aid for Scientific Research (KAKENHI) (B), Japan Society for the Promotion of Science, Apr, 2007 - Mar, 2010

Kanya Kusano
Self-Orgnization and Particle Acceleration on Large Amplitude Plasma Waves and Applications of them.

Grants-in-Aid for Scientific Research (KAKENHI) (Grant-in-Aid for Young Scientists (B)), The Ministry of Education, Culture, Sports, Science and Technology, Apr, 2005 - Mar, 2008

Hiroki Hasegawa

Social Activities

Multiple Approach to Fusion Energy - Simulations and Expansion of them -

Lecturer

The Institute of Electrical Engineers of Japan, Tokai-branch, Academic Lecture of the Institute of Electrical Engineers of Japan, Tokai-branch, Nagoya University, Higashiyama-campus, Chikusa-ku, Nagoya, Japan, Dec 12, 2019

Other

One of figures in a paper appears in the front cover of J. Plasma Fusion Res. Vol. 93 Num. 12

Dec, 2017 - Dec, 2017

One of figures in a paper [Hiroki Hasegawa and Seiji Ishiguro, Plasma Fusion Res. 12, 1401044 (2017)] appears in the front cover of Journal of Plasma and Fusion Research Vol. 93 Num. 12 and the top page of Plasma and Fusion Research website. http://www.jspf.or.jp/journal/93.html (in Japanese)
ITER Newsline 09 January 2017

Jan, 2017 - Jan, 2017

Supercomputer in Japan used for plasma edge simulation https://www.iter.org/whatsnew/134 https://www.iter.org/of-interest/680
EurekAlert!

Dec, 2016 - Dec, 2016

Calculating One Billion Plasma Particles in a Supercomputer: Clarifying the Movements of a Plasma Blob at the Particle Level https://www.eurekalert.org/news-releases/839653
Press Release (National Institute for Fusion Science)

Dec, 2016 - Dec, 2016

Calculating One Billion Plasma Particles in a Supercomputer: Clarifying the Movements of a Plasma Blob at the Particle Level https://www.nifs.ac.jp/news/press-o/161213.html (in Japanese)
One of figures in a paper appears in the front cover of J. Plasma Fusion Res. Vol. 86 Num. 7

Jul, 2010 - Jul, 2010

One of figures in a paper [Hiroki Hasegawa and Tetsuya Sato, Plasma Fusion Res. 5, 020 (2010)] appears in the front cover of Journal of Plasma and Fusion Research Vol. 86 Num. 7. http://www.jspf.or.jp/journal/86.html (in Japanese)