R. Seki

Research interests

Publications

• LHD lhdfida6_prep #162914.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.162914.1

• LHD lhdfida6_prep #151563.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.151563.1

• LHD lhdfida6_prep #157613.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.157613.1

• LHD lhdfida6_prep #156545.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.156545.1

• LHD lhdfida6_prep #153706.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.153706.1

• LHD lhdfida6_prep #168043.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.168043.1

• LHD lhdfida6_prep #161604.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.161604.1

• LHD lhdfida6_prep #153910.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.153910.1

• LHD lhdfida6_prep #152240.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.152240.1

• LHD lhdfida6_prep #151388.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.151388.1

• LHD lhdfida6_prep #168726.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.168726.1

• LHD lhdfida6_prep #157943.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.157943.1

• LHD lhdfida6_prep #151154.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.151154.1

• LHD lhdfida6_prep #165744.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.165744.1

• LHD lhdfida6_prep #164729.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.164729.1

• LHD lhdfida6_prep #162640.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.162640.1

• LHD lhdfida6_prep #165045.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.165045.1

• LHD lhdfida6_prep #165929.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.165929.1

• LHD lhdfida6_prep #160815.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.160815.1

• LHD lhdfida6_prep #154854.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.154854.1

• LHD lhdfida6_prep #165426.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.165426.1

• LHD lhdfida6_prep #168758.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.168758.1

• LHD lhdfida6_prep #151049.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.151049.1

• LHD lhdfida6_prep #152730.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.152730.1

• LHD lhdfida6_prep #151189.1 (analyzed)

  NIFS · 2026 · 10.57451/lhd.a.lhdfida6_prep.151189.1

• High Power Long Pulse Experiment by ICRF Heating in LHD

  Journal of Fusion Energy · 2025 · 10.1007/s10894-025-00536-w

• Degradation of fast-ion confinement depending on the neutral beam power in MHD quiescent LHD plasmas

  Nuclear Fusion · 2024 · 10.1088/1741-4326/ad3971

• Core density profile control by energetic ion anisotropy in LHD

  Physics of Plasmas · 2024 · 10.1063/5.0201440

• First application of data assimilation-based control to fusion plasma

  Scientific Reports · 2024 · 10.1038/s41598-023-49432-3

• Observation of energetic ion anisotropy using neutron diagnostics in the Large Helical Device

  Nuclear Fusion · 2024 · 10.1088/1741-4326/ad4909

• Collective Thomson scattering diagnostic with in situ calibration system for velocity space analysis in large helical device

  Review of Scientific Instruments · 2022 · 10.1063/5.0079296

• Particle control in long-pulse discharge using divertor pumping in LHD

  Physica Scripta · 2022 · 10.1088/1402-4896/ac5269

• Evaluation of Alpha Particle Emission Rate Due to the p-11B Fusion Reaction in the Large Helical Device

  Fusion Science & Technology · 2022 · 10.1080/15361055.2021.1973294

• Observation of significant Doppler shift in deuterium-deuterium neutron energy caused by neutral beam injection in the large helical device

  AAPPS bulletin · 2022 · 10.1007/s43673-022-00036-5

• Studies of energetic particle transport induced by multiple Alfvén eigenmodes using neutron and escaping energetic particle diagnostics in Large Helical Device deuterium plasmas

  Nuclear Fusion · 2022 · 10.1088/1741-4326/ac6f66

• Studies of energetic particle transport induced by multiple Alfvén eigenmodes using neutron and escaping energetic particle diagnostics in Large Helical Device deuterium plasmas

  Nuclear Fusion · 2022 · 10.1088/1741-4326/ac6f66

• Direct observation of the non-locality of non-diffusive counter-gradient electron thermal transport during the formation of hollow electron-temperature profiles in the Large Helical Device

  Physics of Plasmas · 2022 · 10.1063/5.0074351

• Observation of significant Doppler shift in deuterium-deuterium neutron energy caused by neutral beam injection in the large helical device

  AAPPS bulletin · 2022 · 10.1007/s43673-022-00036-5

• Isotope effects on transport in LHD

  Plasma Physics and Controlled Fusion · 2021 · 10.1088/1361-6587/abffb6

• Study of ion cyclotron range of frequencies heating characteristics in deuterium plasma in the Large Helical Device

  Nuclear Fusion · 2021 · 10.1088/1741-4326/ac359d

• A study of beam ion and deuterium–deuterium fusion-born triton transports due to energetic particle-driven magnetohydrodynamic instability in the large helical device deuterium plasmas

  Nuclear Fusion · 2021 · 10.1088/1741-4326/ac0d8a

• A study of beam ion and deuterium–deuterium fusion-born triton transports due to energetic particle-driven magnetohydrodynamic instability in the large helical device deuterium plasmas

  Nuclear Fusion · 2021 · 10.1088/1741-4326/ac0d8a

• Neutron energy spectrum measurement using CLYC7-based compact neutron emission spectrometer in the Large Helical Device

  Journal of Instrumentation · 2021 · 10.1088/1748-0221/16/12/c12025

• Characterization of the New Vertical Neutron Camera Designed for the Low Neutron Emission Rate Plasma in Large Helical Device

  Plasma and Fusion Research · 2021 · 10.1585/pfr.16.1402039

• Characterization of the New Vertical Neutron Camera Designed for the Low Neutron Emission Rate Plasma in Large Helical Device

  Plasma and Fusion Research · 2021 · 10.1585/pfr.16.1402039

• Collective Thomson scattering with 77, 154, and 300 GHz sources in LHD

  Journal of Instrumentation · 2020 · 10.1088/1748-0221/15/01/c01002

• Energetic particle transport and loss induced by helically-trapped energetic-ion-driven resistive interchange modes in the Large Helical Device

  Nuclear Fusion · 2020 · 10.1088/1741-4326/ab6da0

• Enhancement of an E parallel B type neutral particle analyzer with high time resolution in the Large Helical Device

  Journal of Instrumentation · 2020 · 10.1088/1748-0221/15/02/c02021

• Performance of the newly installed vertical neutron cameras for low neutron yield discharges in the Large Helical Device

  Review of Scientific Instruments · 2020 · 10.1063/5.0010302

• Observation of clump structure in transported particle orbit using an upgraded neutral particle analyzer during TAE burst in LHD

  Nuclear Fusion · 2020 · 10.1088/1741-4326/ab7890

• Performance of the newly installed vertical neutron cameras for low neutron yield discharges in the Large Helical Device

  Review of Scientific Instruments · 2020 · 10.1063/5.0010302

• Studies of the fast ion confinement in the Large Helical Device by using neutron measurement and integrated codes

  Journal of Plasma Physics · 2020 · 10.1017/s0022377820000525

• Feasibility Study of Neutral Beam Injection on Chinese First Quasi-Axisymmetric Stellarator (CFQS)

  Plasma and Fusion Research · 2019 · 10.1585/pfr.14.3402067

• Energetic ion confinement studies using comprehensive neutron diagnostics in the Large Helical Device

  Nuclear Fusion · 2019 · 10.1088/1741-4326/ab14bc

• Isotope Effect on Energy Confinement Time and Thermal Transport in Neutral-Beam-Heated Stellarator-Heliotron Plasmas

  Physical Review Letters · 2019 · 10.1103/physrevlett.123.185001

• Isotope effects on energy, particle transport and turbulence in electron cyclotron resonant heating plasma of the Large Helical Device

  Nuclear Fusion · 2019 · 10.1088/1741-4326/ab4237

• Analysis of Energetic Particle Confinement in LHD Using Neutron Measurement and Simulation Codes

  Plasma and Fusion Research · 2019 · 10.1585/pfr.14.3402075

• Evaluation of Neutron Emission Rate with FIT3D-DD Code in Large Helical Device

  Plasma and Fusion Research · 2019 · 10.1585/pfr.14.3402126

• The isotope effect on impurities and bulk ion particle transport in the Large Helical Device

  Nuclear Fusion · 2019 · 10.1088/1741-4326/ab0e41

• Development of NPA array using single crystal CVD diamond detectors

  Journal of Instrumentation · 2019 · 10.1088/1748-0221/14/08/c08002

• Evaluation of an Energetic Particle Profile Using a Tangential-FIDA Diagnostic in the Large Helical Device

  Plasma and Fusion Research · 2019 · 10.1585/pfr.14.3402129

• Observation of enhanced radial transport of energetic ion due to energetic particle mode destabilized by helically-trapped energetic ion in the Large Helical Device

  Nuclear Fusion · 2018 · 10.1088/1741-4326/aaab18

• Time-resolved triton burnup measurement using the scintillating fiber detector in the Large Helical Device

  Nuclear Fusion · 2018 · 10.1088/1741-4326/aaa585

• Analysis of beam slowing-down process in large helical device based on Fokker–Planck operator including beam–beam Coulomb collision effect

  Nuclear Fusion · 2018 · 10.1088/1741-4326/aaeaf4

• Time dependent neutron emission rate analysis for neutral-beam-heated deuterium plasmas in a helical system and tokamaks

  Plasma Physics and Controlled Fusion · 2018 · 10.1088/1361-6587/aad4b7

• Study of first orbit losses of 1 MeV tritons using the Lorentz orbit code in the LHD

  Plasma Science and Technology · 2018 · 10.1088/2058-6272/aaeba8

• Carbon impurities behavior and its impact on ion thermal confinement in high-ion-temperature deuterium discharges on the Large Helical Device

  Plasma Physics and Controlled Fusion · 2018 · 10.1088/1361-6587/aac06c

• Fusion neutron production with deuterium neutral beam injection and enhancement of energetic-particle physics study in the large helical device

  Nuclear Fusion · 2018 · 10.1088/1741-4326/aabcf4

• Realization of high T i plasmas and confinement characteristics of ITB plasmas in the LHD deuterium experiments

  Nuclear Fusion · 2018 · 10.1088/1741-4326/aad87e

• Extended capability of the integrated transport analysis suite, TASK3D-a, for LHD experiment

  Nuclear Fusion · 2017 · 10.1088/1741-4326/aa800a

• Suppression of Trapped Energetic Ions Driven Resistive Interchange Modes with Electron Cyclotron Heating in a Helical Plasma

  Physical Review Letters · 2017 · 10.1103/physrevlett.118.125001

• Extension of operational regime in high-temperature plasmas and effect of ECRH on ion thermal transport in the LHD

  Nuclear Fusion · 2017 · 10.1088/1741-4326/aa754b

• Performance of Impedance Transformer for High-Power ICRF Heating in LHD

  Journal of Physics Conference Series · 2017 · 10.1088/1742-6596/823/1/012007

• Comprehensive magnetohydrodynamic hybrid simulations of fast ion driven instabilities in a Large Helical Device experiment

  Physics of Plasmas · 2017 · 10.1063/1.4997529

• Upgrades and application of FIT3D NBI–plasma interaction code in view of LHD deuterium campaigns

  Plasma Physics and Controlled Fusion · 2016 · 10.1088/0741-3335/58/12/125008

• Investigation of ion and electron heat transport of high- T e ECH heated discharges in the large helical device

  Plasma Physics and Controlled Fusion · 2016 · 10.1088/0741-3335/58/4/045004

• Resistive Interchange Modes Destabilized by Helically Trapped Energetic Ions in a Helical Plasma

  Physical Review Letters · 2015 · 10.1103/physrevlett.114.155003

• Feedback control of plasma density and heating power for steady state operation in LHD

  Fusion Engineering and Design · 2015 · 10.1016/j.fusengdes.2015.09.012

• ICRF Heating Experiment on LHD in Foreseeing a Future Fusion Device

  Plasma and Fusion Research · 2015 · 10.1585/pfr.10.3405046

• Field-aligned-impedance-transforming ICRF antenna in the LHD

  Fusion Engineering and Design · 2015 · 10.1016/j.fusengdes.2015.01.051

• Studies of dust transport in long pulse plasma discharges in the large helical device

  Nuclear Fusion · 2015 · 10.1088/0029-5515/55/5/053014

• Resistive interchange mode destabilized by helically trapped energetic ions and its effects on energetic ions and bulk plasma in a helical plasma

  Nuclear Fusion · 2015 · 10.1088/0029-5515/56/1/016002

• Integrated discharge scenario for high-temperature helical plasma in LHD

  Nuclear Fusion · 2015 · 10.1088/0029-5515/55/11/113020

• Development and application of a ray-tracing code integrating with 3D equilibrium mapping in LHD ECH experiments

  Nuclear Fusion · 2015 · 10.1088/0029-5515/55/12/123019

• Development of steady-state operation using ion cyclotron heating in the Large Helical Device

  Physics of Plasmas · 2014 · 10.1063/1.4884363

• Extension of high Te regime with upgraded electron cyclotron resonance heating system in the Large Helical Device

  Physics of Plasmas · 2014 · 10.1063/1.4884365

• Impact of carbon impurities on the confinement of high-ion-temperature discharges in the Large Helical Device

  Plasma Physics and Controlled Fusion · 2014 · 10.1088/0741-3335/56/9/095011

• Spectrum response and analysis of 77 GHz band collective Thomson scattering diagnostic for bulk and fast ions in LHD plasmas

  Nuclear Fusion · 2014 · 10.1088/0029-5515/54/2/023006

• Extension of the operational regime in high-temperature plasmas and the dynamic-transport characteristics in the LHD

  Nuclear Fusion · 2013 · 10.1088/0029-5515/53/7/073034

• Steady-state operation using a dipole mode ion cyclotron heating antenna and 77 GHz electron cyclotron heating in the Large Helical Device

  Nuclear Fusion · 2013 · 10.1088/0029-5515/53/6/063017

Current projects

No projects listed.