Tokuzawa Tokihiko

Affiliation and department：

Research field (1)： Nuclear fusion

Research theme for competitive and other funds (24)：

2023 - 2028 Quantitative analysis of impurity effects on turbulent transport in magnetically-confined high-temperature plasmas
2021 - 2026 Research for new paradigm of transport due to phase space fluctuations in fusion plasma
2019 - 2023 立体造形アレイアンテナを用いた周波数走査型ミリ波散乱計測によるプラズマ乱流研究
2017 - 2020 Developments of meta-material based phased-array antenna for millimeter-wave Doppler radar
2015 - 2020 coupling between turbulent transport and magnetic topology

2015 - 2020 Observation of fine structure in magnetized plasma

2016 - 2018 Verification of real-time polarization-controlled microwave reflectometry for magnetic field vector profile measurement

2014 - 2017 Development of gradient-curvature measurements and study of spatio-temporal structure

2013 - 2017 Study of the non-linear behavior of interchange MHD instability and its effect on the helical plasma confinement

2013 - 2016 Investigation of negative ion extraction mechanism from a high-density ionic plasma

2012 - 2015 MHD Spectroscopy using energetic particle driven global instabilities in toroidal plasmas

2012 - 2014 Experimental evaluation of bulk-ion heating by energetic particle driven instabilities

2010 - 2012 Developments of Terahertz time-domain spectroscopy for hightemperature and high-density plasma diagnostics

2010 - 2011 ミリ波を用いた核燃焼プラズマ中のD/T燃料比計測法の開発

2009 - 2011 Effects of energetic-ion-driven MHD instabilities in a reversed magnetic shear plasma on energetic ion transport

2008 - 2009 時空相関法によるアルヴェン固有モード内部構造計測

2004 - 2009 Development of Interferometry/Polarimetry for Burning Plasma Control

2006 - 2008 Development of multi-band microwave reflectometer system using an ultrashort pulse

2006 - 2007 周波数ホッピングマイクロ波反射計を用いたアルベン固有モード計測

2003 - 2005 ズーム機能付超短パルスマイクロ波反射計を用いた電子密度揺動計測

2003 - 2005 Development of 2 color short-wavelength FIR laser interferometer and its application to the Large Helical Device

2002 - 2004 Microwave Imaging Diagnostics in LHD

2000 - 2002 Development of O-mode/X-mode selected Reflectometry and its application to the Large Helical Device

1999 - 2001 Measurement of Electron Temperature of Divertor Plasma

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Papers (169)：

K. Ida, M. Yoshinuma, M. Kobayashi, T. Kobayashi, N. Kenmochi, F. Nespoli, R.M. Magee, F. Warmer, A. Dinklage, A. Matsuyama, et al. Overview of Large Helical Device experiments of basic plasma physics for solving crucial issues in reaching burning plasma conditions. Nuclear Fusion. 2024. 64. 11. 112009-112009
T. Nasu, T. Tokuzawa, M. Nakata, K. Ida, S. Inagaki, M. Nishiura, Y. Yoshimura, R. Yanai, K. Tanaka, M. Yoshinuma, et al. Electron-scale turbulence characteristics with varying electron temperature gradient in LHD. Nuclear Fusion. 2024. 64. 9. 096008-096008
T. Kinoshita, K. Tanaka, A. Ishizawa, H. Sakai, M. Nunami, Y. Ohtani, H. Yamada, M. Sato, M. Nakata, T. Tokuzawa, et al. Turbulence Transition in Magnetically Confined Hydrogen and Deuterium Plasmas. Physical Review Letters. 2024. 132. 23
Naoki Kenmochi, Katsumi Ida, Tokihiko Tokuzawa, Yoshinori Mizuno, Ryo Yasuhara, Hisamichi Funaba, Hiyori Uehara, Daniel J. Den Hartog, Mikirou Yoshinuma, Yuki Takemura, et al. Fast nondiffusive response of heat and turbulence pulse propagation. Scientific Reports. 2024. 14. 1
D. Moseev, M. Zanini, H. Kasahara, H.P. Laqua, H. Funaba, W.H.J. Hayashi, W. Heidbrink, K. Ida, H. Igami, Y. Kawamoto, et al. Influence of sawtooth oscillations on fast ions in a stellarator. Nuclear Fusion. 2024. 64. 6. 066028-066028

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MISC (108)：

H. Yamada, K. Tanaka, T. Tokuzawa, R. Seki, C. Suzuki, K. Ida, M. Yokoyama, M. Yoshinuma, K. Fujii, S. Murakami. Characterization of isotope effect on confinement of NBI-heated plasmas on LHD. 45th EPS Conference on Plasma Physics, EPS 2018. 2018. 2018-July. 429-432
S. Sakakibara, K. Y. Watanabe, H. Funaba, Y. Suzuki, S. Ohdachi, K. Ida, K. Tanaka, T. Tokuzawa, T. Morisaki, M. Osakabe, et al. Extension of high-beta plasma operation to low-collisionality regime. Nuclear Fusion. 2017. 57
S. Sakakibara, K. Y, Watanabe, Y. Takemura, M. Okamoto, S. Ohdachi, Y. Suzuki, Y. Narushima, K. Ida, M. Yoshinuma, et al. Characteristics of MHD instabilities limiting the beta value in LHD. Nuclear Fusion. 2015. 55
Tokihiko Tokuzawa, Shigeru Inagaki, Akira Ejiri, Ryota Soga, Ichihiro Yamada, Shin Kubo, Mikiro Yoshinuma, Katsumi Ida, Chihiro Suzuki, Kenji Tanaka, et al. Ka-band microwave frequency comb doppler reflectometer system for the large helical device. Plasma and Fusion Research. 2014. 9
S. Kitajima, H. Takahashi, K. Ishii, Y. Sato, M. Kanno, J. Tachibana, A. Okamoto, M. Sasao, S. Inagaki, M. Takayama, et al. Transition of poloidal viscosity by electrode biasing in the Large Helical Device. Nuclear Fusion. 2013. 53

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