List of selected papers

  1. Collisional-energy-cascade model for nonthermal velocity distributions of neutral atoms in plasmas
    Keisuke Fujii
    Physical Review E 108, 025204 (2023)
    10.1103/PhysRevE.108.025204

  2. Power-Law Intensity Distribution of γ-Decay Cascades: Nuclear Structure as a Scale-Free Random Network
    Keisuke Fujii, Julian C. Berengut
    Physical Review Letters 126, 102502 (2021)
    10.1103/PhysRevLett.126.102502

  3. Simple Explanation for the Observed Power Law Distribution of Line Intensity in Complex Many-Electron Atoms
    Keisuke Fujii, Julian C. Berengut
    Physical Review Letters 124, 185002 (2020)
    10.1103/physrevlett.124.185002

  4. Study of neutral hydrogen transport in LHD core plasmas based on high dynamic-range Balmer-αspectroscopy
    K. Fujii, M. Goto, S. Morita, The LHD Experiment Group
    Nuclear Fusion 55, 063029 (2015)
    10.1088/0029-5515/55/6/063029

  5. Development of a high dynamic range spectroscopic system for observation of neutral hydrogen atom density distribution in Large Helical Device core plasma
    K. Fujii, S. Atsumi, S. Watanabe, T. Shikama, M. Goto, S. Morita, M. Hasuo
    Review of Scientific Instruments 85, 023502 (2014)
    10.1063/1.4863650

List of papers (first- and corresponding-author)

  1. Experimental validation of a collision-radiation dataset for molecular hydrogen in plasmas
    Keisuke Fujii, Keiji Sawada, Arseniy Kuzmin, Motoshi Goto, Masahiro Kobayashi, Liam H. Scarlett, Dmitry V. Fursa, Igor Bray, Mark C. Zammit, Theodore M. Biewer
    Physics of Plasmas 31, 092512 (2024)
    10.1063/5.0220933

  2. Conceptual design of a Doppler spectrometer for 102 m/s cross-field flows in tokamak divertors
    K. Fujii, R. Sano, T. Nakano, G. Ronchi, J.-S. Park, J. D. Lore, M. Shafer, T. M. Biewer
    Review of Scientific Instruments 95, 073527 (2024)
    10.1063/5.0219456

  3. Plasma-parameter dependence of ro-vibrational temperatures for H2 in LHD divertor
    Keisuke Fujii, Tsubasa Oshioka, Atsushi Niihama, Arseniy Kuzmin, Taiichi Shikama, Masahiro Kobayashi, Masahiro Hasuo
    Journal of Quantitative Spectroscopy and Radiative Transfer 310, 108751 (2023)
    10.1016/j.jqsrt.2023.108751

  4. Collisional-energy-cascade model for nonthermal velocity distributions of neutral atoms in plasmas
    Keisuke Fujii
    Physical Review E 108, 025204 (2023)
    10.1103/PhysRevE.108.025204

  5. A simple data-driven level finding method of many-electron atoms and heavy nuclei based on statistical outlier detection
    Kazuaki Hongu, Keisuke Fujii
    Journal of Physics D: Applied Physics 56, 244002 (2023)
    10.1088/1361-6463/acc66f

  6. Power-Law Intensity Distribution of γ-Decay Cascades: Nuclear Structure as a Scale-Free Random Network
    Keisuke Fujii, Julian C. Berengut
    Physical Review Letters 126, 102502 (2021)
    10.1103/PhysRevLett.126.102502

  7. Population kinetics of many-electron atoms in ionizing plasmas studied using a continuous collisional radiative model
    Akira Nishio, Julian C. Berengut, Masahiro Hasuo, Keisuke Fujii
    Physical Review E 102, 053211 (2020)
    10.1103/PhysRevE.102.053211

  8. Simple Explanation for the Observed Power Law Distribution of Line Intensity in Complex Many-Electron Atoms
    Keisuke Fujii, Julian C. Berengut
    Physical Review Letters 124, 185002 (2020)
    10.1103/physrevlett.124.185002

  9. Robust Regression for Automatic Fusion Plasma Analysis Based on Generative Modeling
    K. Fujii, C. Suzuki, M. Hasuo
    IEEE Transactions on Plasma Science 47, 3305-3314 (2019)
    10.1109/TPS.2019.2921073

  10. Machine Learning of Noise in LHD Thomson Scattering System
    Keisuke Fujii, Ichihiro Yamada, Masahiro Hasuo
    Fusion Science and Technology 74, 57-64 (2018)
    10.1080/15361055.2017.1396179

  11. Experimental evaluation of fractional abundance data for W23+–W28+
    Keisuke Fujii, Daiji Kato, Nobuyuki Nakamura, Motoshi Goto, Shigeru Morita, Masahiro Hasuo
    Journal of Physics B: Atomic, Molecular and Optical Physics 50, 055004 (2017)
    10.1088/1361-6455/50/5/055004

  12. Data-driven sensitivity inference for Thomson scattering electron density measurement systems
    Keisuke Fujii, Ichihiro Yamada, Masahiro Hasuo
    Review of Scientific Instruments 88, 013508 (2017)
    10.1063/1.4974344

  13. Inversion Methods of the Balmer-α Line Profile for Hydrogen Atom Density Evaluation in High-Temperature Plasmas
    Keisuke Fujii, Motoshi Goto, Shigeru Morita, Masahiro Hasuo
    Fusion Science and Technology 69, 514-525 (2016)
    10.13182/FST15-168

  14. Visible emission spectroscopy of highly charged tungsten ions in LHD: I. Survey of new visible emission lines
    M Shinohara, K Fujii, D Kato, N Nakamura, M Goto, S Morita, M Hasuo
    Physica Scripta 90, 125402 (2015)
    10.1088/0031-8949/90/12/125402

  15. Visible emission spectroscopy of highly charged tungsten ions in LHD: II. Evaluation of tungsten ion temperature
    K Fujii, Y Takahashi, Y Nakai, D Kato, M Goto, S Morita, M Hasuo
    Physica Scripta 90, 125403 (2015)
    10.1088/0031-8949/90/12/125403

  16. Study of neutral hydrogen transport in LHD core plasmas based on high dynamic-range Balmer-αspectroscopy
    K. Fujii, M. Goto, S. Morita, The LHD Experiment Group
    Nuclear Fusion 55, 063029 (2015)
    10.1088/0029-5515/55/6/063029

  17. Development of a high dynamic range spectroscopic system for observation of neutral hydrogen atom density distribution in Large Helical Device core plasma
    K. Fujii, S. Atsumi, S. Watanabe, T. Shikama, M. Goto, S. Morita, M. Hasuo
    Review of Scientific Instruments 85, 023502 (2014)
    10.1063/1.4863650

  18. Hydrogen transport diagnostics by atomic and molecular emission line profiles simultaneously measured for large helical device
    K. Fujii, T. Shikama, M. Goto, S. Morita, M. Hasuo
    Physics of Plasmas 20, 012514 (2013)
    10.1063/1.4789454

  19. A Collisional-Radiative Model for Hydrogen Atom Including Velocity Changing Collisions
    Keisuke FUJII, Taiichi SHIKAMA, Keiji SAWADA, Motoshi GOTO, Shigeru MORITA, Masahiro HASUO
    Plasma and Fusion Research 6, 2401125-2401125 (2011)
    10.1585/pfr.6.2401125

  20. Kinetic energy measurement of hydrogen in LHD peripheral plasma with a multi-wavelength-range fine-resolution spectrometer
    Keisuke Fujii, Keisuke Mizushiri, Tomomi Nishioka, Taiichi Shikama, Atsushi Iwamae, Motoshi Goto, Shigeru Morita, Masahiro Hasuo
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 623, 690-692 (2010)
    10.1016/j.nima.2010.02.100

  21. Development of multiwavelength-range fine-resolution spectrometer for hydrogen emissions and its application to large helical device periphery plasmas
    K. Fujii, K. Mizushiri, T. Nishioka, T. Shikama, A. Iwamae, M. Goto, S. Morita, S Kado, K. Sawada, M. Hasuo
    Review of Scientific Instruments 81, 033106 (2010)
    10.1063/1.3356730

List of published papers

  1. Machine learning aided line intensity ratio method for helium–hydrogen mixed recombining plasmas
    Shin Kajita, Daisuke Nishijima, Keisuke Fujii, Hirohiko Tanaka, Jordy Vernimmen, Hennie van der Meiden, Ivo Classen, Noriyasu Ohno
    Plasma Physics and Controlled Fusion 66, 105005 (2024)
    10.1088/1361-6587/ad6a81

  2. Application of machine learning for optical emission spectroscopy data in NAGDIS-II
    Shin Kajita, Takehiro Sakakibara, Hideki Kaizawa, Hiroki Natsume, Hirohiko Tanaka, Keisuke Fujii, Noriyasu Ohno
    Fusion Engineering and Design 196, 114012 (2023)
    10.1016/j.fusengdes.2023.114012

  3. Atomic and ionic hydrogen flux probe for quantitative in-situ monitoring of hydrogen recycling
    A. Kuzmin, K. Miura, M. Kobayashi, K. Hanada, K. Fujii, T. Shikama, M. Hasuo, H. Zushi
    Fusion Engineering and Design 189, 113462 (2023)
    10.1016/j.fusengdes.2023.113462

  4. Use of machine learning for a helium line intensity ratio method in Magnum-PSI
    Shin Kajita, Sho Iwai, Hirohiko Tanaka, Daisuke Nishijima, Keisuke Fujii, Hennie van der Meiden, Noriyasu Ohno
    Nuclear Materials and Energy 33, 101281 (2022)
    10.1016/j.nme.2022.101281

  5. Modeling the wavelength of unresolved transition arrays in the extreme ultraviolet region from Sn to Hf ions by combining theoretical and experimental spectral data
    A. Sasaki, K. Fujii, I. Murakami, H. A. Sakaue, T. Nishikawa, H. Ohashi, N. Nakamura
    AIP Advances 12, 025309 (2022)
    10.1063/5.0077130

  6. Ro-vibrational population distribution in the ground state of hydrogen isotopologues in LHD peripheral plasmas deduced from emission spectroscopy
    Hiroki Ishihara, Arseniy Kuzmin, Masahiro Kobayashi, Taiichi Shikama, Keiji Sawada, Seiki Saito, Hiroaki Nakamura, Keisuke Fujii, Masahiro Hasuo
    Journal of Quantitative Spectroscopy and Radiative Transfer 267, 107592 (2021)
    10.1016/j.jqsrt.2021.107592

  7. Comprehensive Laboratory Measurements Resolving the LMM Dielectronic Recombination Satellite Lines in Ne-like Fe xvii Ions
    Filipe Grilo, Chintan Shah, Steffen Kühn, René Steinbrügge, Keisuke Fujii, José Marques, Ming Feng Gu, José Paulo Santos, José R. Crespo López-Urrutia, Pedro Amaro
    The Astrophysical Journal 913, 140 (2021)
    10.3847/1538-4357/abf737

  8. Application of multiple regression for sensitivity analysis of helium line emissions to the electron density and temperature in Magnum-PSI
    Shin Kajita, Daisuke Nishijima, Keisuke Fujii, Gijs Akkermans, Hennie van der Meiden
    Plasma Physics and Controlled Fusion 63, 055018 (2021)
    10.1088/1361-6587/abf36e

  9. On the triad transfer analysis of plasma turbulence: symmetrization, coarse graining, and directional representation
    S Maeyama, M Sasaki, K Fujii, T Kobayashi, R O Dendy, Y Kawachi, H Arakawa, S Inagaki
    New Journal of Physics 23, 043049 (2021)
    10.1088/1367-2630/abeffc

  10. Compressing the time series of five dimensional distribution function data from gyrokinetic simulation using principal component analysis
    Yuuichi Asahi, Keisuke Fujii, Dennis Manuel Heim, Shinya Maeyama, Xavier Garbet, Virginie Grandgirard, Yanick Sarazin, Guilhem Dif-Pradalier, Yasuhiro Idomura, Masatoshi Yagi
    Physics of Plasmas 28, 012304 (2021)
    10.1063/5.0023166

  11. Observation of strong two-electron–one-photon transitions in few-electron ions
    M. Togawa, S. Kühn, C. Shah, P. Amaro, R. Steinbrügge, J. Stierhof, N. Hell, M. Rosner, K. Fujii, M. Bissinger, R. Ballhausen, M. Hoesch, J. Seltmann, S. Park, F. Grilo, F. S. Porter, J. P. Santos, M. Chung, T. Stöhlker, J. Wilms, T. Pfeifer, G. V. Brown, M. A. Leutenegger, S. Bernitt, J. R. Crespo López-Urrutia
    Physical Review A 102, 052831 (2020)
    10.1103/PhysRevA.102.052831

  12. Plasma Spectroscopy on an Aluminum-Pellet Ablation Cloud in an LHD Plasma with an Echelle Spectrometer
    Hirotaka Tanaka, Keisuke Fujii, Taiichi Shikama, Shigeru Morita, Motoshi Goto, Masahiro Hasuo
    Atoms 8, 81 (2020)
    10.3390/atoms8040081

  13. High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem
    Steffen Kühn, Chintan Shah, José R. Crespo López-Urrutia, Keisuke Fujii, René Steinbrügge, Jakob Stierhof, Moto Togawa, Zoltán Harman, Natalia S. Oreshkina, Charles Cheung, Mikhail G. Kozlov, Sergey G. Porsev, Marianna S. Safronova, Julian C. Berengut, Michael Rosner, Matthias Bissinger, Ralf Ballhausen, Natalie Hell, SungNam Park, Moses Chung, Moritz Hoesch, Jörn Seltmann, Andrey S. Surzhykov, Vladimir A. Yerokhin, Jörn Wilms, F. Scott Porter, Thomas Stöhlker, Christoph H. Keitel, Thomas Pfeifer, Gregory V. Brown, Maurice A. Leutenegger, Sven Bernitt
    Physical Review Letters 124, 225001 (2020)
    10.1103/PhysRevLett.124.225001

  14. Emission spectroscopy of He lines in high-density plasmas in Magnum-PSI
    Shin Kajita, Gijs Akkermans, Keisuke Fujii, Hennie van der Meiden, M. C. M. van de Sanden
    AIP Advances 10, 025225 (2020)
    10.1063/1.5143481

  15. Isotope Effect on Energy Confinement Time and Thermal Transport in Neutral-Beam-Heated Stellarator-Heliotron Plasmas
    H. Yamada, K. Tanaka, R. Seki, C. Suzuki, K. Ida, K. Fujii, M. Goto, S. Murakami, M. Osakabe, T. Tokuzawa, M. Yokoyama, M. Yoshinuma, LHD Experiment Group
    Physical Review Letters 123, 185001 (2019)
    10.1103/PhysRevLett.123.185001

  16. Atomic kinetics calculations of complex highly-charged ions in plasmas in non-local thermodynamic equilibrium by using a Monte-Carlo approach
    Akira Sasaki, Richard M. More, Keisuke Fujii, Daiji Kato, Izumi Murakami
    High Energy Density Physics 32, 1-7 (2019)
    10.1016/j.hedp.2019.04.005

  17. The isotope effect on impurities and bulk ion particle transport in the Large Helical Device
    K. Ida, R. Sakamoto, M. Yoshinuma, K. Yamazaki, T. Kobayashi, Y. Fujiwara, C. Suzuki, K. Fuji, J. Chen, I. Murakami, M. Emoto, R. Mackenbach, H. Yamada, G. Motojima, S. Masuzaki, K. Mukai, K. Nagaoka, H. Takahashi, T. Oishi, M. Goto, S. Morita, N. Tamura, H. Nakano, S. Kamio, R. Seki, M. Yokoyama, S. Murakami, M. Nunami, M. Nakata, T. Morisaki, M. Osakabe, the LHD Experiment Group
    Nuclear Fusion 59, 056029 (2019)
    10.1088/1741-4326/ab0e41

  18. Spatially resolved laser absorption spectroscopy on a micro-hollow cathode He plasma
    Keisuke Ueno, Kenta Kamebuchi, Jiro Kakutani, Leo Matsuoka, Shinichi Namba, Keisuke Fujii, Taiichi Shikama, Masahiro Hasuo
    Japanese Journal of Applied Physics 58, SAAB03 (2019)
    10.7567/1347-4065/aaec19

  19. Analysis of the impurity flow velocity in a wide plasma parameter range for deuterium and hydrogen plasmas in the divertor legs of the stochastic layer in LHD
    A. Kuzmin, M. Kobayashi, T. Nakano, G. Kawamura, M. Hasuo, K. Fujii, T. Morisaki
    Nuclear Materials and Energy 17, 217-221 (2018)
    10.1016/j.nme.2018.11.009

  20. Laser absorption spectroscopy for measurement of He metastable atoms of a microhollow cathode plasma
    Keisuke Ueno, Kenta Kamebuchi, Jiro Kakutani, Leo Matsuoka, Shinichi Namba, Keisuke Fujii, Taiichi Shikama, Masahiro Hasuo
    Japanese Journal of Applied Physics 57, 01AA03 (2018)
    10.7567/jjap.57.01aa03

  21. Spatially Resolved Measurements of Metastable Atom Density and Electric Field Strength in a Microhollow Cathode Helium Plasma by Laser Absorption Spectroscopy
    Keisuke UENO, Kenta KAMEBUCHI, Jiro KAKUTANI, Leo MATSUOKA, Shinichi NAMBA, Keisuke FUJII, Taiichi SHIKAMA, Masahiro HASUO
    Plasma and Fusion Research 13, 3406070-3406070 (2018)
    10.1585/pfr.13.3406070

  22. Measurements of the Impurity Flow Velocity and Temperature in Deuterium and Hydrogen Plasmas in the Divertor Legs of the Stochastic Layer in LHD
    Arseniy KUZMIN, Masahiro KOBAYASHI, Tomohide NAKANO, Masahiro HASUO, Keisuke FUJII, Motoshi GOTO, Taiichi SHIKAMA, Tomohiro MORISAKI, the LHD Experiment Group
    Plasma and Fusion Research 13, 3402058-3402058 (2018)
    10.1585/pfr.13.3402058

  23. Extension of the operational regime of the LHD towards a deuterium experiment
    Y. Takeiri, T. Morisaki, M. Osakabe, M. Yokoyama, S. Sakakibara, H. Takahashi, Y. Nakamura, T. Oishi, G. Motojima, S. Murakami, K. Ito, A. Ejiri, S. Imagawa, S. Inagaki, M. Isobe, S. Kubo, S. Masamune, T. Mito, I. Murakami, K. Nagaoka, K. Nagasaki, K. Nishimura, M. Sakamoto, R. Sakamoto, T. Shimozuma, K. Shinohara, H. Sugama, K.Y. Watanabe, J.W. Ahn, N. Akata, T. Akiyama, N. Ashikawa, J. Baldzuhn, T. Bando, E. Bernard, F. Castejón, H. Chikaraishi, M. Emoto, T. Evans, N. Ezumi, K. Fujii, H. Funaba, M. Goto, T. Goto, D. Gradic, Y. Gunsu, S. Hamaguchi, H. Hasegawa, Y. Hayashi, C. Hidalgo, T. Higashiguchi, Y. Hirooka, Y. Hishinuma, R. Horiuchi, K. Ichiguchi, K. Ida, T. Ido, H. Igami, K. Ikeda, S. Ishiguro, R. Ishizaki, A. Ishizawa, A. Ito, Y. Ito, A. Iwamoto, S. Kamio, K. Kamiya, O. Kaneko, R. Kanno, H. Kasahara, D. Kato, T. Kato, K. Kawahata, G. Kawamura, M. Kisaki, S. Kitajima, W.H. Ko, M. Kobayashi, S. Kobayashi, T. Kobayashi, K. Koga, A. Kohyama, R. Kumazawa, J.H. Lee, D. López-Bruna, R. Makino, S. Masuzaki, Y. Matsumoto, H. Matsuura, O. Mitarai, H. Miura, J. Miyazawa, N. Mizuguchi, C. Moon, S. Morita, T. Moritaka, K. Mukai, T. Muroga, S. Muto, T. Mutoh, T. Nagasaka, Y. Nagayama, N. Nakajima, Y. Nakamura, H. Nakanishi, H. Nakano, M. Nakata, Y. Narushima, D. Nishijima, A. Nishimura, S. Nishimura, T. Nishitani, M. Nishiura, Y. Nobuta, H. Noto, M. Nunami, T. Obana, K. Ogawa, S. Ohdachi, M. Ohno, N. Ohno, H. Ohtani, M. Okamoto, Y. Oya, T. Ozaki, B.J. Peterson, M. Preynas, S. Sagara, K. Saito, H. Sakaue, A. Sanpei, S. Satake, M. Sato, T. Saze, O. Schmitz, R. Seki, T. Seki, I. Sharov, A. Shimizu, M. Shiratani, M. Shoji, C. Skinner, R. Soga, T. Stange, C. Suzuki, Y. Suzuki, S. Takada, K. Takahata, A. Takayama, S. Takayama, Y. Takemura, Y. Takeuchi, H. Tamura, N. Tamura, H. Tanaka, K. Tanaka, M. Tanaka, T. Tanaka, Y. Tanaka, S. Toda, Y. Todo, K. Toi, M. Toida, M. Tokitani, T. Tokuzawa, H. Tsuchiya, T. Tsujimura, K. Tsumori, S. Usami, J.L. Velasco, H. Wang, T.-H. Watanabe, T. Watanabe, J. Yagi, M. Yajima, H. Yamada, I. Yamada, O. Yamagishi, N. Yamaguchi, Y. Yamamoto, N. Yanagi, R. Yasuhara, E. Yatsuka, N. Yoshida, M. Yoshinuma, S. Yoshimura, Y. Yoshimura
    Nuclear Fusion 57, 102023 (2017)
    10.1088/1741-4326/aa7fc2

  24. Behavior of 23S metastable state He atoms in low-temperature recombining plasmas
    Shin Kajita, Tadashi Tsujihara, Mitsutoshi Aramaki, Hennie van der Meiden, Hiroshi Oshima, Noriyasu Ohno, Hirohiko Tanaka, Ryo Yasuhara, Tsuyoshi Akiyama, Keisuke Fujii, Taiichi Shikama
    Physics of Plasmas 24, 073301 (2017)
    10.1063/1.4990077

  25. Comparison of Ion Internal Transport Barrier Formation between Hydrogen and Helium Dominated Plasmas
    Kenichi NAGAOKA, Hiromi TAKAHASHI, Kenji TANAKA, Masaki OSAKABE, Sadayoshi MURAKAMI, Shogo MAETA, Masayuki YOKOYAMA, Keisuke FUJII, Haruhisa NAKANO, Hiroshi YAMADA, Yasuhiko TAKEIRI, Katsumi IDA, Mikiro YOSHINUMA, the LHD Experiment Group
    Plasma and Fusion Research 11, 2402106-2402106 (2016)
    10.1585/pfr.11.2402106

  26. Integrated discharge scenario for high-temperature helical plasma in LHD
    K. Nagaoka, H. Takahashi, S. Murakami, H. Nakano, Y. Takeiri, H. Tsuchiya, M. Osakabe, K. Ida, M. Yokoyama, M. Yoshinuma, S. Morita, M. Goto, T. Oishi, N. Pablant, K. Fujii, K. Tanaka, N. Tamura, Y. Nakamura, X. Du, T. Ido, A. Shimizu, S. Kubo, H. Igami, R. Seki, C. Suzuki, Y. Suzuki, K. Tsumori, K. Ikeda, M. Kisaki, Y. Yoshimura, T. Shimozuma, T. Seki, K. Saito, H. Kasahara, S. Kamio, T. Mutoh, O. Kaneko, H. Yamada, A. Komori
    Nuclear Fusion 55, 113020 (2015)
    10.1088/0029-5515/55/11/113020

  27. Overview of transport and MHD stability study: focusing on the impact of magnetic field topology in the Large Helical Device
    K. Ida, K. Nagaoka, S. Inagaki, H. Kasahara, T. Evans, M. Yoshinuma, K. Kamiya, S. Ohdach, M. Osakabe, M. Kobayashi, S. Sudo, K. Itoh, T. Akiyama, M. Emoto, A. Dinklage, X. Du, K. Fujii, M. Goto, T. Goto, M. Hasuo, C. Hidalgo, K. Ichiguchi, A. Ishizawa, M. Jakubowski, G. Kawamura, D. Kato, S. Morita, K. Mukai, I. Murakami, S. Murakami, Y. Narushima, M. Nunami, N. Ohno, N. Pablant, S. Sakakibara, T. Seki, T. Shimozuma, M. Shoji, K. Tanaka, T. Tokuzawa, Y. Todo, H. Wang, M. Yokoyama, H. Yamada, Y. Takeiri, T. Mutoh, S. Imagawa, T. Mito, Y. Nagayama, K.Y. Watanabe, N. Ashikawa, H. Chikaraishi, A. Ejiri, M. Furukawa, T. Fujita, S. Hamaguchi, H. Igami, M. Isobe, S. Masuzaki, T. Morisaki, G. Motojima, K. Nagasaki, H. Nakano, Y. Oya, C. Suzuki, Y. Suzuki, R. Sakamoto, M. Sakamoto, A. Sanpei, H. Takahashi, H. Tsuchiya, M. Tokitani, Y. Ueda, Y. Yoshimura, S. Yamamoto, K. Nishimura, H. Sugama, T. Yamamoto, H. Idei, A. Isayama, S. Kitajima, S. Masamune, K. Shinohara, P.S. Bawankar, E. Bernard, M. von Berkel, H. Funaba, X.L. Huang, T. Ii, T. Ido, K. Ikeda, S. Kamio, R. Kumazawa, T. Kobayashi, C. Moon, S. Muto, J. Miyazawa, T. Ming, Y. Nakamura, S. Nishimura, K. Ogawa, T. Ozaki, T. Oishi, M. Ohno, S. Pandya, A. Shimizu, R. Seki, R. Sano, K. Saito, H. Sakaue, Y. Takemura, K. Tsumori, N. Tamura, H. Tanaka, K. Toi, B. Wieland, I. Yamada, R. Yasuhara, H. Zhang, O. Kaneko, A. Komori, Collaborators
    Nuclear Fusion 55, 104018 (2015)
    10.1088/0029-5515/55/10/104018

  28. Effect of the RF wall conditioning on the high performance plasmas in the Large Helical Device
    H. Takahashi, M. Osakabe, K. Nagaoka, H. Nakano, M. Tokitani, K. Fujii, S. Murakami, Y. Takeiri, T. Seki, K. Saito, H. Kasahara, R. Seki, S. Kamio, S. Masuzaki, T. Mutoh
    Journal of Nuclear Materials 463, 1100-1103 (2015)
    10.1016/j.jnucmat.2014.11.131

  29. Flow damping due to stochastization of the magnetic field
    K. Ida, M. Yoshinuma, H. Tsuchiya, T. Kobayashi, C. Suzuki, M. Yokoyama, A. Shimizu, K. Nagaoka, S. Inagaki, K. Itoh, the LHD Experiment Group, T. Akiyama, M. Emoto, T. Evans, A. Dinklage, X. Du, K. Fujii, M. Goto, T. Goto, M. Hasuo, C. Hidalgo, K. Ichiguchi, A. Ishizawa, M. Jakubowski, K. Kamiya, H. Kasahara, G. Kawamura, D. Kato, M. Kobayashi, S. Morita, K. Mukai, I. Murakami, S. Murakami, Y. Narushima, M. Nunami, S. Ohdach, N. Ohno, M. Osakabe, N. Pablant, S. Sakakibara, T. Seki, T. Shimozuma, M. Shoji, S. Sudo, K. Tanaka, T. Tokuzawa, Y. Todo, H. Wang, H. Yamada, Y. Takeiri, T. Mutoh, S. Imagawa, T. Mito, Y. Nagayama, K. Y. Watanabe, N. Ashikawa, H. Chikaraishi, A. Ejiri, M. Furukawa, T. Fujita, S. Hamaguchi, H. Igami, M. Isobe, S. Masuzaki, T. Morisaki, G. Motojima, K. Nagasaki, H. Nakano, Y. Oya, Y. Suzuki, R. Sakamoto, M. Sakamoto, A. Sanpei, H. Takahashi, M. Tokitani, Y. Ueda, Y. Yoshimura, S. Yamamoto, K. Nishimura, H. Sugama, T. Yamamoto, H. Idei, A. Isayama, S. Kitajima, S. Masamune, K. Shinohara, P. S. Bawankar, E. Bernard, M. von Berkel, H. Funaba, X. L. Huang, T. Ii, T. Ido, K. Ikeda, S. Kamio, R. Kumazawa, C. Moon, S. Muto, J. Miyazawa, T. Ming, Y. Nakamura, S. Nishimura, K. Ogawa, T. Ozaki, T. Oishi, M. Ohno, S. Pandya, R. Seki, R. Sano, K. Saito, H. Sakaue, Y. Takemura, K. Tsumori, N. Tamura, H. Tanaka, K. Toi, B. Wieland, I. Yamada, R. Yasuhara, H. Zhang, O. Kaneko, A. Komori
    Nature Communications 6, 5816 (2015)
    10.1038/ncomms6816

  30. Development of the Heating Scenarios to Achieve High-Ion Temperature Plasma in the Large Helical Device<sup> </sup>
    Yasuhiko TAKEIRI, Osamu KANEKO, Masaki OSAKABE, Kenichi NAGAOKA, Sadayoshi MURAKAMI, Hiromi TAKAHASHI, Haruhisa NAKANO, Katsumi IDA, Shigeru MORITA, Masayuki YOKOYAMA, Mikiro YOSHINUMA, Keisuke FUJII, Motoshi GOTO, Chihiro SUZUKI, Ryosuke SEKI, Katsuyoshi TSUMORI, Katsunori IKEDA, Masashi KISAKI, Takashi MUTOH, Hiroshi YAMADA, Akio KOMORI, the LHD Experiment Group
    Plasma and Fusion Research 10, 1402001-1402001 (2015)
    10.1585/pfr.10.1402001

  31. Extension of operation regimes and investigation of three-dimensional currentless plasmas in the Large Helical Device
    O. Kaneko, H. Yamada, S. Inagaki, M. Jakubowski, S. Kajita, S. Kitajima, Kobayashi, K. Koga, T. Morisaki, S. Morita, T. Mutoh, S. Sakakibara, Y. Suzuki, H. Takahashi, K. Tanaka, K. Toi, Y. Yoshimura, T. Akiyama, Y. Asahi, N. Ashikawa, H. Chikaraishi, A. Cooper, D.S. Darrow, E. Drapiko, P. Drewelow, X. Du, A. Ejiri, M. Emoto, T. Evans, N. Ezumi, K. Fujii, T. Fukuda, H. Funaba, M. Furukawa, D.A. Gates, M. Goto, T. Goto, W. Guttenfelder, S. Hamaguchi, M. Hasuo, T. Hino, Y. Hirooka, K. Ichiguchi, K. Ida, H. Idei, T. Ido, H. Igami, K. Ikeda, S. Imagawa, T. Imai, M. Isobe, M. Itagaki, T. Ito, K. Itoh, S. Itoh, A. Iwamoto, K. Kamiya, T. Kariya, H. Kasahara, N. Kasuya, D. Kato, T. Kato, K. Kawahata, F. Koike, S. Kubo, R. Kumazawa, D. Kuwahara, S. Lazerson, H. Lee, S. Masuzaki, S. Matsuoka, H. Matsuura, A. Matsuyama, C. Michael, D. Mikkelsen, O. Mitarai, T. Mito, J. Miyazawa, G. Motojima, K. Mukai, A. Murakami, I. Murakami, S. Murakami, T. Muroga, S. Muto, K. Nagaoka, K. Nagasaki, Y. Nagayama, N. Nakajima, H. Nakamura, Y. Nakamura, H. Nakanishi, H. Nakano, T. Nakano, K. Narihara, Y. Narushima, K. Nishimura, S. Nishimura, M. Nishiura, Y.M. Nunami, T. Obana, K. Ogawa, S. Ohdachi, N. Ohno, N. Ohyabu, T. Oishi, M. Okamoto, A. Okamoto, M. Osakabe, Y. Oya, T. Ozaki, N. Pablant, B.J. Peterson, A. Sagara, K. Saito, R. Sakamoto, H. Sakaue, M. Sasao, K. Sato, M. Sato, K. Sawada, R. Seki, T. Seki, V. Sergeev, S. Sharapov, I. Sharov, A. Shimizu, T. Shimozuma, M. Shiratani, M. Shoji, S. Sudo, H. Sugama, C. Suzuki, K. Takahata, Y. Takeiri, Y. Takemura, M. Takeuchi, H. Tamura, N. Tamura, H. Tanaka, T. Tanaka, M. Tingfeng, Y. Todo, M. Tokitani, K. Tokunaga, T. Tokuzawa, H. Tsuchiya, K. Tsumori, Y. Ueda, L. Vyacheslavov, K.Y. Watanabe, T. Watanabe, T.H. Watanabe, B. Wieland, I. Yamada, S. Yamada, S. Yamamoto, N. Yanagi, R. Yasuhara, M. Yokoyama, N. Yoshida, S. Yoshimura, T. Yoshinaga, M. Yoshinuma, A. Komori
    Nuclear Fusion 53, 104015 (2013)
    10.1088/0029-5515/53/10/104015

  32. Effective screening of iron impurities in the ergodic layer of the Large Helical Device with a metallic first wall
    S. Morita, C.F. Dong, M. Kobayashi, M. Goto, X.L. Huang, I. Murakami, T. Oishi, E.H. Wang, N. Ashikawa, K. Fujii, M. Hasuo, H. Kasahara, D. Kato, F. Koike, S. Masuzaki, H.A. Sakaue, T. Shikama, N. Yamaguchi, the LHD Experiment Group
    Nuclear Fusion 53, 093017 (2013)
    10.1088/0029-5515/53/9/093017

  33. Development of a compact thermal lithium atom beam source for measurements of electron velocity distribution function anisotropy in electron cyclotron resonance plasmas
    T. Nishioka, T. Shikama, S. Nagamizo, K. Fujii, H. Zushi, M. Uchida, A. Iwamae, H. Tanaka, T. Maekawa, M. Hasuo
    Review of Scientific Instruments 84, 073509 (2013)
    10.1063/1.4815721

  34. Evaluation of particle source rate and its influence on particle transport in fusion plasma
    M Goto, K Sawada, K Fujii, M Hasuo, S Morita
    Journal of Physics: Conference Series 397, 012023 (2012)
    10.1088/1742-6596/397/1/012023

  35. Wideband High-Resolution Spectroscopy on Al-pellet Ablation Plasmas in Large Helical Device
    M Hasuo, K Fujii, T Shikama, S Morita, M Goto, H Tanaka
    Journal of Physics: Conference Series 397, 012016 (2012)
    10.1088/1742-6596/397/1/012016

  36. A simultaneous measurement of polarization-resolved spectra of neutral helium 23P–33D, 21P–31D and 23P–33S emissions from the periphery of a Large Helical Device plasma
    K Mizushiri, K Fujii, T Shikama, A Iwamae, M Goto, S Morita, M Hasuo
    Plasma Physics and Controlled Fusion 53, 105012 (2011)
    10.1088/0741-3335/53/10/105012

  37. Plasma polarization spectroscopy of atomic and molecular emissions from magnetically confined plasmas1This review is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas.
    T. Shikama, K. Fujii, S. Kado, H. Zushi, M. Sakamoto, A. Iwamae, M. Goto, S. Morita, M. Hasuo
    Canadian Journal of Physics 89, 495-501 (2011)
    10.1139/p10-118

  38. Evaluation of hydrogen atom density in the plasma core region based on the Balmer-𝛂 line profile
    M. Goto, K. Sawada, K. Fujii, M. Hasuo, S. Morita
    Nuclear Fusion 51, 023005 (2011)
    10.1088/0029-5515/51/2/023005

  39. Calculation of a magnetic field effect on emission spectra of light diatomic molecules for diagnostic application to fusion edge plasmas
    T Shikama, K Fujii, K Mizushiri, M Hasuo, S Kado, H Zushi
    Plasma Physics and Controlled Fusion 51, 122001 (2009)
    10.1088/0741-3335/51/12/122001

  40. Edge and Core Impurity Transport Study with Spectroscopic Instruments in LHD
    Shigeru Morita, Motoshi Goto, Masahiro Kobayashi, Sadatsugu Muto, Malay Bikas Chowdhuri, Dong Chunfeng, Zhou Hangyu, Cui Zhengying, Keisuke Fujii, Akihiro Furuzawa, Masahiro Hasuo, Atsushi Iwamae, Jie Yinxian, Mohammed Koubiti, Ikuya Sakurai, Yuzuru Tawara, Wan Baonian, Wu Zhenwei, Naohiro Yamaguchi
    Plasma Science and Technology 11, 402-408 (2009)
    10.1088/1009-0630/11/4/07

  41. Gene transfer device utilizing micron-spiked electrodes produced by the self-organization phenomenon of Fe-alloy
    Naoki Miyano, Yuuki Inoue, Yuji Teramura, Keisuke Fujii, Fujio Tsumori, Hiroo Iwata, Hidetoshi Kotera
    Lab on a Chip 8, 1104 (2008)
    10.1039/b718655j