RYOSUKE SEKI

助教/Assistant Professor

核融合科学研究所/National Institute for Fusion Science

Japan

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About

Ryosuke Seki is an Assistant Professor at the National Institute for Fusion Science in Japan. His research focuses on energetic particle dynamics in plasma confinement, particularly in tokamak and helical devices. Recent studies include kinetic estimations of tritium and neutron yields, and investigations into Alfvén eigenmodes and their effects on fast-ion transport in the Large Helical Device. Professor Seki contributes to advancing the understanding of plasma physics through innovative diagnostics and experimental methodologies.

Articles (19)

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2025

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2021

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2021

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2021

Collaborators (15)

Hideo Nuga

助教/Assistant Professor

核融合科学研究所/National Institute for Fusion Science

JAPAN

RYOSUKE SEKI

Research Interests

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About

Articles (19)

Ion cyclotron range of frequencies plasma production and heating in the large helical device

Energetic particle driven Alfvén eigenmodes and associated energetic particle redistribution in a tokamak burning plasma

Kinetic estimation of tritium and neutron yields in all LHD deuterium experiment campaigns

Core density profile control by energetic ion anisotropy in LHD

First experiments on RF plasma production at relatively low magnetic fields in the LHD

Isotope effects on transport characteristics of edge and core plasmas heated by neutral beam injection (NBI) in an inward shifted configuration at the Large Helical Device

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

Orbit-following simulations of fast-ion transport and losses due to the Alfvén eigenmode burst in the Large Helical Device

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

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

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

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

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

Characteristics of neutron emission profile from neutral beam heated plasmas of the Large Helical Device at various magnetic field strengths

Precession drift reversal and rapid transport of trapped energetic particles due to an energetic particle driven instability in the Large Helical Device

Magnetohydrodynamic hybrid simulation model with kinetic thermal ions and energetic particles

Characterization of isotope effect on ion internal transport barrier and its parameter dependence in the Large Helical Device

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

Analysis of the Motional Stark Effect (MSE) diagnostic to measure the rotational transform and current profile in the Large Helical Device

Collaborators (15)

Hideo Nuga

Jialei Wang

正樹 西浦

Tokihiko Tokuzawa

Makoto Kobayashi

Kunihiro OGAWA

Satoshi Odachi

Suguru Masuzaki

毅 井戸

Sadayoshi Murakami

Yasushi Todo

Andreas Dinklage

Kenichi Nagaoka

Tatsuya Kobayashi

Dirk Hartmann

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正樹西浦

毅井戸