SANPEI Akio

FacultyElectrical Engineering and Electronics
PositionAssociate Professor
Last Updated :2021/06/14

Profile

Degree

  • 2001/03
  • 2004/03

Campus Career

  • 2004/04-2007年03月, Kyoto Institute of Technology, Research Associate
  • 2007/04-2014年01月, Kyoto Institute of Technology, Assistant Professor
  • 2014/02-2019年01月, Kyoto Institute of Technology, Junior Associate Professor
  • 2019/02-, Kyoto Institute of Technology, Associate Professor
  • Educational Activities

    Classes

    • Quantum Mechanics
    • Laboratory Work in Basic Physics
    • Mathematical Methods in Electronics Engineering
    • PhysicsⅠ
    • Plasma Analysis
    • Plasma Diagnostic Technology

    Syllabus

    Display

    Research Activities

    Research Field

    Association Memberships

      Institute of Electrical and Electronics Engineers

    Papers

    • A Data-Assimilation Based Method for Equilibrium Reconstruction of Magnetic Fusion Plasma and Its Application to Reversed Field Pinch
      Author : Akio Sanpei, Takayuki Okamoto, Sadao Masamune, and Yasuaki Kuroe
      Journal : IEEE Access
      Publication Date : 2021/05
      Volume,Number,Page : Vol.9, pp.74739-74751
    • Collection of microorganisms levitating in a radio-frequency discharge
      Author : Yasutaka Kawade, Akio Sanpei, Keita Akamatsu, Ryotaro Ochiai, Toshikazu Okada, Yasuaki Hayashi, and Haruhiko Himura
      Journal : Japanese Journal of Applied Physics
      Publication Date : 2021/03
      Volume,Number,Page : vol.60, No.4, 046002
    • Removal of ghost particles from the reconstruction of dusty plasma in integral photography by three-dimensional deconvolution
      Author : Akio Sanpei, Eisaku Kai, and Yasutaka Kawade
      Journal : Optics Express
      Publication Date : 2020/12
      Volume,Number,Page : Vol.28, pp.37743-37751
    • Active Control System for Stabilization of Resistive Wall Mode in the Low-aspect-ratio RFP RELAX
      Author : Tomoyuki Nagano, Sadao Masamune, Akio Sanpei
      Journal : IEEJ Transactions on Fundamentals and Materials
      Publication Date : 2020/06
      Volume,Number,Page : vol.140, No.6 pp.340-341
    • Effects of reconnection downstream conditions on electron parallel acceleration during the merging start-up of a spherical tokamak
      Author : M. Inomoto, T. Ushiki, X. Guo, T. Sugawara, K. Kondo, T. Mihara, Y. Minami, Y. Inai, H. Kaneko, R. Yanai, Y. Takahata, H. Tanabe, Y. Ono, A. Sanpei and S. Kamio
      Journal : Nuclear Fusion
      Publication Date : 2019/07
      Volume,Number,Page : Volume 59, Number 8, 086040
    • First Observation of Crystallike Configuration of Microorganisms in an RF Plasma
      Author : Akio Sanpei, Tomohito Kigami, Yasuaki Hayashi, Haruhiko Himura, Sadao Masamune, Mai Sampei
      Journal : IEEE Transactions on Plasma Science
      Publication Date : 2019/07
      Volume,Number,Page : Vol.47, Issue7, pp.3074-3078
    • Cylindrical vs toroidal Single Helical states in the low aspect- ratio RELAX device
      Author : R. Paccagnella, S. Masamune, N. Mizuguchi, I. Predebon, A. Sanpei
      Journal : in the proceedings of the 46th EPS Conference on Plasma Physics
      Publication Date : 2019/07
      Volume,Number,Page : P5.1103
    • Controlling the Diameter of a Pure Electron Plasma to Produce an Exact Two-Fluid Plasma State in a Nested Trap
      Author : Toshiki KATO, Haruhiko HIMURA, Shinji SOWA and Akio SANPEI
      Journal : Plasma and Fusion Research
      Publication Date : 2019/02
      Volume,Number,Page : 14・1201039
    • Relaxation models for single helical reversed field pinch plasmas at low aspect ratio
      Author : R. Paccagnella, S. Masamune, A. Sanpei
      Journal : Physics of Plasmas
      Publication Date : 2018/07
      Volume,Number,Page : vol.25, 072507
    • Repeatable Intense Beam Generation of Micro-Particles Attached with 10^7 Electrons
      Author : Akihiro MOHRI and Akio SANPEI
      Journal : Plasma and Fusion Research
      Publication Date : 2018/05
      Volume,Number,Page : vol.13, 1406042
    • Levitation of Microorganisms in the Sheath of an RF Plasma
      Author : A. Sanpei, T. Kigami, H. Kanaya, Y. Hayashi, M. Sampei
      Journal : IEEE Transactions on Plasma Science
      Publication Date : 2018/04
      Volume,Number,Page : Vol.46, Issue4, pp.718-722
    • Two-dimensional macroscopic shapes of lithium ion and electron plasmas after elapse of two-fluid plasma state
      Author : S. Yamada, H. Himura, T. Kato, S. Okada, A. Sanpei, S. Masamune
      Journal : Non-Neutral Plasma Physics
      Publication Date : 2018/01
      Volume,Number,Page : 10・020016
    • Observation of macroscopic stability of weakly magnetized Li+ ion beams near the Brillouin density limit
      Author : K. Furukawa, H. Himura, S. Okada, A. Sanpei, S. Masamune
      Journal : Non-Neutral Plasma Physics
      Publication Date : 2018/01
      Volume,Number,Page : 10・020002
    • Design of an open-ended plenoptic camera for three-dimensional imaging of dusty plasmas
      Author : Akio Sanpei, Kazuya Tokunaga, Yasuaki Hayashi
      Journal : Japanese Journal of Applied Physics
      Publication Date : 2017/08
      Volume,Number,Page : Vol.56, No.8, 080305
    • Extension of the operational regime of the LHD towards a deuterium experiment
      Author : 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, and Y. Yoshimura
      Journal : Nuclear Fusion
      Publication Date : 2017/08
      Volume,Number,Page : Vol.56, No.8, 102023
    • Features of the Electron-Temperature Distribution in a Low-Aspect-Ratio Reversed Field Pinch Plasmas
      Author : Akio Sanpei, Kanae Nishimura, Yusuke Aoki, Sadao Masamune, Haruhiko Himura, Satoshi Ohdachi, Naoki Mizuguchi
      Journal : Journal of the Physical Society of Japan
      Publication Date : 2017/06
      Volume,Number,Page : Vol.86, No.6, 063501
    • Permutation entropy and statistical complexity in characterising low-aspect-ratio reversed-field pinch plasma
      Author : T Onchi, A Fujisawa, A Sanpei, H Himura, S Masamune and RELAX team
      Journal : Physica Scripta
      Publication Date : 2017/04
      Volume,Number,Page : vol.92, 055601
    • Applicability of micro-channel plate followed by phosphor screen to charged particles
      Author : H. Himura, S. Nakata, A. Sanpei
      Journal : Rev. Sci. Instrum.
      Publication Date : 2016/06
      Volume,Number,Page : vol.87, p.063306
    • Mie-Scattering Ellipsometry System for Analysis of Dust Formation Process in Large Plasma Device
      Author : Yasuaki Hayashi, Masahiro Kawano, Akio Sanpei, and Suguru Masuzaki
      Journal : IEEE TRANSACTIONS ON PLASMA SCIENCE
      Publication Date : 2016/05
      Volume,Number,Page : vol.44, No.6, p.1032
    • Initial result of three-dimensional reconstruction of dusty plasma through integral photography technique
      Author : Akio Sanpei, Naoki Takao, Yusuke Kato, Yasuaki Hayashi
      Journal : IEEE Transactions on Plasma Science
      Publication Date : 2016/04
      Volume,Number,Page : Vol.44, Issue4, pp.558-561
    • Overview of transport and MHD stability study: focusing on the impact of magnetic field topology in the Large Helical Device
      Author : 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. Pablant1, 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. Furukawa1, T. Fujita, S. Hamaguchi, H. Igami, M. Isobe, S. Masuzaki, T. Morisaki, G. Motojima, K. Nagasaki, H. Nakano, Y. Oya1, C. Suzuki, Y. Suzuki, R. Sakamoto, M. Sakamoto, A. Sanpei, H. Takahashi, H. Tsuchiya, M. Tokitani, Y. Ueda, Y. Yoshimura, S. Yamamoto1, K. Nishimura, H. Sugama, T. Yamamoto, H. Idei, A. Isayama, S. Kitajima, S. Masamune1, 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
      Journal : Nuclear Fusion
      Publication Date : 2015/07
      Volume,Number,Page : vol.55, 104018
    • Phase space analysis for dynamics of three vortices of pure electron plasma trapped with Penning trap
      Author : A. Sanpei, Y. Soga, K. Ito, H. Himura
      Journal : AIP Conf. Proc.
      Publication Date : 2015/06
      Volume,Number,Page : vol.1668, 030002
    • Improvement of confinement times of lithium ion and electron plasmas in BX-U
      Author : H. Himura, T. Noichi, S. Nakata, A. Sanpei, S. Kawai
      Journal : AIP Conf. Proc.
      Publication Date : 2015/06
      Volume,Number,Page : vol.1668, 050004
    • A Prototype Diagnostics System to Detect Ultraviolet Emission for Plasma Turbulence
      Author : T. Onchi, A. Fujisawa, A. Sanpei
      Journal : Rev. Sci. Instrum
      Publication Date : 2014/11
      Volume,Number,Page : 85・113502
    • Reconstruction of the Eddy Current Profile on the Vacuum Vessel in a Fusion Device using only the External Magnetic Sensor Signals
      Author : Masafumi ITAGAKI, Akio Sanpei, Sadao Masamune, Kiyomasa WATANABE
      Journal : WIT Transactions on Modelling and Simulation
      Publication Date : 2014/10
      Volume,Number,Page : Volume 57, pp.149-162
    • Effect on Plasma Performance of a Single MHD Mode Feedback
      Author : Hiroyuki Tanaka, Sadao Masamune, Seiya Nakaki, Akio Sanpei, Kanae Nishimura, Ryosuke Kodera, Go Ishii, Ryota Ueba, Haruhiko Himura, Paccagnella, Roberto
      Journal : Plasma and Fusion Research
      Publication Date : 2014/06
      Volume,Number,Page : Volume 9, 1302057-1 - 1302057-4
    • Measurement and evaluation of 3-D structure in low-aspect-ratio RFP RELAX with dual SXR imaging system
      Author : A. Sanpei, K. Nishimura, S. Masamune, H. Tanaka, H. Himura, S. Ohdachi, N. Mizuguchi, T. Akiyama
      Journal : JPS Conf. Proc.
      Publication Date : 2014/04
      Volume,Number,Page : 1・015027
    • Formation process of non-neutral plasmas by multiple electron beams on BX-U
      Author : A. Sanpei, H. Himura, S. Masamune
      Journal : JPS Conf. Proc.
      Publication Date : 2014/04
      Volume,Number,Page : 1・015039
    • Feasibility of growth of ZnO cluster in penning trap
      Author : H. Himura, A. Sanpei, Y. Nishioka, S. Masamune
      Journal : JPS Conf. Proc.
      Publication Date : 2014/04
      Volume,Number,Page : 1・015067
    • Analysis of orbital E x B rotation of non-neutral plasmas formed in BX-U
      Author : S. Nishioka, H. Himura, A. Sanpei, S. Masamune
      Journal : JPS Conf. Proc.
      Publication Date : 2014/04
      Volume,Number,Page : 1・015041
    • Effects of rotating electric field on simultaneous confinement of lithium and electron plasmas
      Author : H. Shimomura, H. Himura, A. Sanpei, S. Masamune
      Journal : JPS Conf. Proc.
      Publication Date : 2014/04
      Volume,Number,Page : 1・015040
    • 2-D electron temperature diagnostic using soft-x ray imaging technique
      Author : K. Nishimura, A. Sanpei, H. Tanaka, G. Ishi, R. Kodera, R. Ueba, H. Himura, S. Masamune, S. Ohdachi, N. Mizuguchi
      Journal : Rev. Sci. Instrum
      Publication Date : 2014/03
      Volume,Number,Page : 85・033502
    • Reconstruction of the Eddy Current Distribution on the Vacuum Vessel in a Reversed Field Pinch Device based on the External Magnetic Sensor Signals
      Author : Masafumi Itagaki, Akio Sanpei, Sadao Masamune, Kiyomasa Watanabe
      Journal : Plasma and Fusion Research
      Publication Date : 2014/03
      Volume,Number,Page : Volume 9, 1402046-1 - 1402046-13
    • Electron temperature measurement by Thomson scattering in a low-aspect-ratio RFP RELAX
      Author : R. Ueba, S. Masamune, A. Sanpei, K. Uchiyama, H. Tanaka, K. Nishimura, G. Ishi, R. Kodera, H. Himura, D. J. Den Hartog, H. Koguchi
      Journal : Plasma and Fusion Rsearch
      Publication Date : 2014/02
      Volume,Number,Page : 9・(2)・1302009
    • Dependence of properties of quasi-single-helicity states of field reversal parameter in a low-aspect-ratio reversed field pinch
      Author : K. Oki, A. Sanpei, H. Himura, S. Masamune
      Journal : Transactions of Fusion Science and Technology
      Publication Date : 2013/06
      Volume,Number,Page : 63・386
    • Initial results on simultaneous confinement of pure lithium ion and electron plasmas
      Author : H. Himura, H. Shimomura, T. Nakase, A. Sanpei, S. Masamune
      Journal : Plasma and Fusion Research
      Publication Date : 2013/04
      Volume,Number,Page : 8・2401017
    • Not only independently producing but simultaneously confining of lithium and electron plasmas
      Author : H. Shimomura, H. Himura, T. Ohta, T. Nakase, S. Nishioka, A. Sanpei, S. Masamune, A. Mohri
      Journal : Plasma and Fusion Research (Rapid Communications)
      Publication Date : 2013/02
      Volume,Number,Page : 8・1201003
    • Asymmetric toroidal flux generation due to phase locking of internally resonant tearing modes in the RELAX reversed-field pinch
      Author : R. Ikezoe, S. Masamune, K. Oki, A. Sanpei, H. Himura, T. Onchi, A. Hirose
      Journal : Plasma Physics and Controlled Fusion
      Publication Date : 2013/01
      Volume,Number,Page : 55・015005
    • Phase Locking and Unlocking Associated with Transition to Quasi-Single Helicity State in the RELAX Reversed-Field Pinch
      Author : R. Ikezoe, S. Masamune, K. Oki, A. Sanpei, H. Himura, T. Onchi, A. Hirose
      Journal : Journal of the Physical Society of Japan
      Publication Date : 2012/10
      Volume,Number,Page : 81・115001
    • Modeling of Formation of Helical Structures in Reversed-Field Pinch
      Author : N. Mizuguchi, A. Sanpei, S. Fujita, K. Oki, H. Himura, S. Masamune, K. Ichiguchi
      Journal : Plasma and Fusion Research
      Publication Date : 2012/07
      Volume,Number,Page : 7・2403117
    • Design and Initial Result of Time-Resolved Vertical Soft X-Ray Imaging System in Low-A RFP
      Author : A. Sanpei, K. Oki, D. Fukahori, K. Deguchi, S. Nakaki, K. Nishimura, H. Himura, S. Masamune, S. Ohdachi, N. Nishino, T. Onchi
      Journal : Plasma and Fusion Research
      Publication Date : 2012/06
      Volume,Number,Page : 7・ 2402052
    • Characterization of Quasi-Single-Helicity States in a Low-Aspect-Ratio RFP
      Author : K. Oki, D. Fukahori, K. Deguchi, S. Nakaki, A. Sanpei, R. Paccagnella, H. Himura, S. Masamune
      Journal : Plasma and Fusion Research
      Publication Date : 2012/04
      Volume,Number,Page : 7・ 1402028
    • Tangential Image of Helical SXR Emissivity Structure in Low-Aspect-Ratio RFP
      Author : A. Sanpei, K. Oki, M. Nakamura, A. Higashi, H. Motoi, D. Fukahori, H. Himura, S. Masamune, S. Ohdachi, N. Nishino, T. Onchi, R. Ikezoe
      Journal : IEEE Transactions on Plasma Science
      Publication Date : 2011/11
      Volume,Number,Page : 39・11・ 2410
    • Observation of helical structure by imaging diagnostics in a low-aspect-ratio reversed field pinch
      Author : T. Onchi, R. Ikezoe, K Oki, A. Sanpei, H. Himura, S. Masamune, N. Nishino, H. Koguchi
      Journal : J. Phys. Soc. Jpn.
      Publication Date : 2011/11
      Volume,Number,Page : 80・(11)・114501
    • Initial Result of Successive SXR Imaging Measurement in Low-A RFP
      Author : A. Sanpei, K. Oki, M. Nakamura, A. Higashi, H. Motoi, D. Fukahori, H. Himura, S. Masamune, S. Ohdachi, N. Nishino, T. Onchi, R. Ikezoe
      Journal : Plasma and Fusion Research
      Publication Date : 2011/07
      Volume,Number,Page : 6・ 2406096
    • Extended operational regimes and MHD behavior in a low-aspect-ratio reversed field pinch in RELAX
      Author : R. Ikezoe, K. Oki, T. Onchi, Y. Konishi, M. Sugihara, S. Fujita, A. Sanpei, H. Himura, S. Masamune
      Journal : Plasma Phys. Control. Fusion
      Publication Date : 2011/02
      Volume,Number,Page : 53・2・025003
    • Density Regimes of Low-Aspect-Ratio RFP Plasmas in RELAX
      Author : M. Sugihara, K. Oki, R. Ikezoe, T. Onchi, A. Sanpei, H. Himura, S. Masamune, T. Akiyama, A. Ejiri, K. Sakamoto, K. Nagasaki, V. Zhuravlev
      Journal : Plasma and Fusion Research
      Publication Date : 2010/12
      Volume,Number,Page : 5・S2061
    • Recent Progress in Low-A RFP Plasma Research in RELAX
      Author : A. Sanpei, R. Ikezoe, T. Onchi, K. Oki, M. Sugihara, Y. Konishi, S. Fujita, M. Nakamura, A. Higashi, H. Motoi, H. Himura, S. Masamune
      Journal : Plasma and Fusion Research
      Publication Date : 2010/12
      Volume,Number,Page : 5・S2063
    • Tangential soft-x ray imaging for three-dimensional structural studies in a reversed field pinch
      Author : T. Onchi, R. Ikezoe, K. Oki, A. Sanpei, H. Himura, S. Masamune
      Journal : Rev. Sci. Instrum.
      Publication Date : 2010/07
      Volume,Number,Page : 81・7・073502
    • Characterization of MHD behavior in a low-aspect ratio RFP
      Author : R. Ikezoe, T. Onchi, K. Oki, A. Sanpei, H. Himura, S. Masamune
      Journal : Journal of Plasma and Fusion Research Series
      Publication Date : 2009/12
      Volume,Number,Page : 8・1031-1035
    • Characterization of equilibria in a low-aspect-ratio RFP
      Author : A. Sanpei, K. Oki, R. Ikezoe, T. Onchi, H. Shimazu, T. Yamashita, H. Himura, S. Masamune
      Journal : Journal of Plasma and Fusion Research Series
      Publication Date : 2009/12
      Volume,Number,Page : 8・1066-1069
    • Numerical Investigation of Velocity Map of Outward Electrons Penetrating in Helical Magnetic Surfaces
      Author : K. Nakamura, H. Himura, M. Isobe, A. Sanpei, S. Masamune
      Journal : Journal of Plasma and Fusion Research Series
      Publication Date : 2009/12
      Volume,Number,Page : 8・955-958
    • Change in Spectrum of Ionic Liquids Exposed to 2.45GHz Surface Wave Plasmas
      Author : M. Miyagishi, A. Irie, H. Himura, S. Masamune, A. Sanpei, N. Hasuike, N. Ichinose, T. Wakasugi
      Journal : Journal of Plasma and Fusion Research Series
      Publication Date : 2009/12
      Volume,Number,Page : 8・608-611
    • MHD Properties of Low-aspect Ratio RFP in RELAX
      Author : S. Masamune, A. Sanpei, R. Ikezoe, T. Onchi, K. Oki, T. Yamashita, H. Shimazu, H. Himura, R. Paccagnella
      Journal : Journal of Fusion Energy
      Publication Date : 2009/04
      Volume,Number,Page : 28・2・187
    • Recent progress on toroidal nonneutral plasmas confined on heliotron magnetic surfaces
      Author : H. Himura, K. Nakamura, D. Sugimoto, A. Sanpei, S. Masamune, M. Isobe, F. Sano
      Journal : AIP Conf. Proceedings
      Publication Date : 2008/12
      Volume,Number,Page : 1114・p.47-54
    • Numerical study on formation process of helical nonneutral plasmas using electron injection from outside magnetic surfaces
      Author : K. Nakamura, H. Himura, M. Isobe, S. Masamune, A. Sanpei
      Journal : in the proceedings of the 18th international toki conference
      Publication Date : 2008/12
      Volume,Number,Page : 462-465
    • Studies on nonneutral plasmas confined on helical magnetic surfaces of Heliotron J
      Author : D. Sugimoto, H. Himura, K. Nakamura, S. Masamune, A. Sanpei, H. Okada, S. Yamamoto, S. Kobayashi, T. Mizuuchi, F. Sano
      Journal : in the proceedings of the 18th international toki conference
      Publication Date : 2008/12
      Volume,Number,Page : 466-469
    • Observation of large-scale profile change of magnetic field in a low-aspect ratio reversed field pinch
      Author : K. Oki, R. Ikezoe, T. Onchi, A. Sanpei, H. Himura, S. Masamune, R. Paccagnella
      Journal : Journal of the Physical Society of Japan
      Publication Date : 2008/07
      Volume,Number,Page : 77・7・075005-1 - 075005-2
    • Characterization of Initial Low-Aspect Ratio RFP Plasmas in "RELAX"
      Author : S. Masamune, A. Sanpei, R. Ikezoe, T. Onchi, K. Murata, K. Oki, H. Shimazu, T. Yamashita, H. Himura
      Journal : Journal of the Physical Society of Japan
      Publication Date : 2007/12
      Volume,Number,Page : 76 (No.12), 123501
    • Design of soft-X ray imaging system for magnetic islands of RFP plasmas
      Author : Akio SANPEI, T. Onchi, R. Ikezoe, H. Himura, S. Masamune
      Journal : Plasma and Fusion Research
      Publication Date : 2007/11
      Volume,Number,Page : vol.2 S1064
    • Electron current measurement of helical nonneutral plasmas for investigating plasma disruption observed in CHS experiments
      Author : H. Himura, Y. Yamamoto, Akio SANPEI, S. Masamune, M. Isobe, S. Okamura, K. Matsuoka
      Journal : Plasma and Fusion Research
      Publication Date : 2007/11
      Volume,Number,Page : vol.2 S1089
    • Development of phosphor screen having gridded energy analyzer for two-fluid nonneutral plasma experiments
      Author : K. Morita, H. Himura, Akio SANPEI, S. Masamune
      Journal : Plasma and Fusion Research
      Publication Date : 2007/11
      Volume,Number,Page : vol.2 S1127
    • Application of a soft-X ray imaging system to the STE-2 RFP
      Author : T. Onchi, Akio SANPEI, R. Ikezoe, H. Himura, S. Masamune
      Journal : Plasma and Fusion Research
      Publication Date : 2007/11
      Volume,Number,Page : vol.2 S1063
    • Probing of toroidal electron plasmas confined on helical magnetic surfaces
      Author : Y. Yamamoto, H. Himura, Akio SANPEI, S. Masamune, M. Isobe, S. Okamura, K. Matsuoka
      Journal : Plasma and Fusion Research
      Publication Date : 2007/11
      Volume,Number,Page : vol.2 S1093
    • Hot electron plasmas trapped in helical magnetic surfaces
      Author : H. Himura, Y. Yamamoto, A. Sanpei, S. Masamune, M. Isobe, S. Okamura, K. Matsuoka
      Journal : Hyperfine Interact
      Publication Date : 2007/09
      Volume,Number,Page : 174, pp.83-88
    • Formation of a symmetric vortex configuration in a pure electron plasma trapped with a penning trap
      Author : Akio Sanpei, Kiyokazu Ito, Yukihiro Soga Jun Aoki and Yasuhito Kiwamoto
      Journal : Hyperfine Interactions
      Publication Date : 2007/08
      Volume,Number,Page : vol.174 pp.71-76
    • Research plans for low-aspect ratio Reversed Field Pinch (RFP)
      Author : S. Masamune, A. Sanpei, H. Himura, R. Ikezoe, T. Onchi, M. Nagata, H. Hiramatsu, D. Ishijima
      Journal : Transactions of Fusion Science and Technology
      Publication Date : 2007/04
      Volume,Number,Page : 51 (No. 2T) pp.197-199
    • Experimental verification of non-constant potential and density on magnetic surfaces of helical nonneutral plasmas
      Author : H. Himura, H. Wakabayashi, Y. Yamamoto, M. Isobe, S. Okamura, K. Matsuoka, A. Sanpei, S. Masamune
      Journal : Physics of Plasmas
      Publication Date : 2007/02
      Volume,Number,Page : 14, p.022507-1 ? 022507-7
    • Recent results of helical nonneutral plasmas on Compact Helical System (CHS)
      Author : H. Himura, Y. Yamamoto, A. Sanpei, S. Masamune, H. Wakabayashi, M. Isobe
      Journal : AIP Conf. Proceedings
      Publication Date : 2006/12
      Volume,Number,Page : 862・p.51-55
    • Mode‐analytical Examination of Vortex Dynamics of a Pure Electron Plasma in the Relaxation to a Meta‐equilibrium Distribution
      Author : Yosuke Kawai, Yasuhito Kiwamoto, Kiyokazu Ito, Akio Sanpei, Yukihiro Soga, Jun Aoki, Kimitaka Itoh
      Journal : AIP Conference Proceedings
      Publication Date : 2006/11
      Volume,Number,Page : vol.82 p.39
    • Relaxation of Azimuthal Flow Pattern from Ring to Bell Shape through Two-Dimensional Turbulence Triggered by Diocotron Instability
      Author : Y. Kawai, Y. Kiwamoto, K. Ito, A. Sanpei, Y. Soga, J. Aoki, and K. Itoh
      Journal : J. Phys. Soc. Jpn.
      Publication Date : 2006/10
      Volume,Number,Page : Vol.75 No.10
    • Optimized method of producing washers of titanium hydride for plasma gun using occluded hydrogen gas
      Author : HIMURA Haruhiko, SAITO Yuya, SANPEI Akio, MASAMUNE Sadao, TAKEUCHI Nobuyuki, SHIONO Takeshi
      Journal : Review of Scientific Instruments
      Publication Date : 2006/07
      Volume,Number,Page : 77・7・073506 1-5
    • Controlled experiments on self-organization of ordered structures in a pure electron plasma
      Author : Y. Kiwamoto, J. Aoki, Y. Soga, and A. Sanpei
      Journal : Plasma Phys. Controlled Fusion
      Publication Date : 2005/05
      Volume,Number,Page : Vol.47, A41-51
    • High-Fidelity Optical Transfer System for Two Dimensional Imaging of Density Distribution of a Pure Electron Plasma
      Author : *J. Aoki, Y. Kiwamoto, Y. Soga, A. Sanpei
      Journal : Jpn. J. Appl. Phys.
      Publication Date : 2004/00
      Volume,Number,Page : Vol43, No.10 pp.7267-7270
    • Novel Application of Electron Vortex Dynamics to the Alignment of Magnetic and Cylinder Axes
      Author : *J. Aoki, Y. Kiwamoto, Y. Soga, A. Sanpei
      Journal : Jpn. J. Appl. Phys.
      Publication Date : 2004/00
      Volume,Number,Page : Vol43, No.11A pp.7777-7781
    • Merger and binary structure formation of two discrete vortices in a background vorticity distribution of a pure electron plasma
      Author : *Y. Soga, Y. Kiwamoto, A. Sanpei, J. Aoki
      Journal : Phys. Plasmas
      Publication Date : 2003/10
      Volume,Number,Page : Vol.10, No.10 pp.3922-3926
    • Formation of a Vortex Crystal Cell Assisted by a Background Vorticity Distribution
      Author : *A. Sanpei, Y. Kiwamoto, K. Ito, Y. Soga
      Journal : Phys. Rev. E.
      Publication Date : 2003/07
      Volume,Number,Page : Vol.68, No.1-2, 016404 (6 pages)
    • Mechanisms of merger and binary structure formation of two discrete vortices in a nonneutral plasma
      Author : *Yukihiro Soga, Yasuhito Kiwamoto, Akio Sanpei, Jun Aoki
      Journal : in Non-neutral Plasma Physics V
      Publication Date : 2003/00
      Volume,Number,Page : pp.112-117
    • Formation of a Triangle Vortex Configuration Assisted by a Background Vorticity Distribution
      Author : *Akio Sanpei, Yasuhito Kiwamoto, Yukihiro Soga, Jun Aoki
      Journal : in Non-neutral Plasma Physics V
      Publication Date : 2003/00
      Volume,Number,Page : pp.106-111
    • Strong Effects of Background Vorticity Distribution on theDynamics of Coerent Vortices in Electron Plasma
      Author : *Y. Kiwamoto, K. Ito, A. Sanpei, Y. Soga
      Journal : Physica Scripta
      Publication Date : 2002/00
      Volume,Number,Page : T98, pp.34-37
    • Bifurcation in the evolution of vortex structure in a magnetized pure electron plasma
      Author : *Y. Kiwamoto, A. Sanpei, K. Ito
      Journal : in Bifurcation Phenomena in Plasmas
      Publication Date : 2002/00
      Volume,Number,Page : pp.114-127
    • Generation of Vorticity Hole Surrounding a Point Vortex
      Author : *A. Sanpei, Y. Kiwamoto, K. Ito
      Journal : J. Phys. Soc. Jpn. (Lett.)
      Publication Date : 2001/10
      Volume,Number,Page : Vol.70, pp.2813-2816
    • Field Analysis of Two-Dimensional Dynamics of Nonneutral Plasma with Imaging Diagnostics and Examination of Sector-Probing
      Author : *K. Ito, Y. Kiwamoto, A. Sanpei
      Journal : Jpn. J. Appl. Phys.
      Publication Date : 2001/04
      Volume,Number,Page : Vol.40, pp.2558-2565
    • Two-dimensional Vortex Dynamics in a Potential-Confined Electron Plasma
      Author : *Y. Kiwamoto, K. Ito, A. Sanpei, A. Mohri
      Journal : Transactions of Fusion Technology
      Publication Date : 2001/00
      Volume,Number,Page : Vol. 39, pp.119-126
    • Controlled Experiment of Two-Dimensional Vortex Dynamics
      Author : *Y. Kiwamoto, K. Ito, A. Sanpei
      Journal : J. Plasma Fusion Research
      Publication Date : 2001/00
      Volume,Number,Page : SERIES 4, pp.124-130
    • Vorticity Hole Surrounding a Point Vortex
      Author : *A. Sanpei, Y. Kiwamoto, K. Ito
      Journal : J. Plasma Fusion Research
      Publication Date : 2001/00
      Volume,Number,Page : SERIES 4, pp.545-549
    • Determination of Stream Function of 2D Vortex in Nonneutral Plasma and Testing Sector Probe Signals
      Author : *K. Ito, Y. Kiwamoto, A. Sanpei
      Journal : J. Plasma Fusion Research
      Publication Date : 2001/00
      Volume,Number,Page : SERIES 4, pp.550-554
    • Interaction of Electron vortices under the Influence of Background Vorticity Distribution
      Author : *Y. Kiwamoto, K. Ito, A. Sanpei, Y. Soga, T. Yuyama, T. Michishita
      Journal : in Non-neutral Plasma Physics IV (AIP Conference Proceedings 606)
      Publication Date : 2001/00
      Volume,Number,Page : pp.464-473
    • Characteristics and Generation Mechanism of Holes in an Extended Electron Vortex
      Author : *Akio Sanpei, Kiyokazu Ito, Yukihiro Soga, Yasuhito Kiwamoto
      Journal : in Non-neutral Plasma Physics IV (AIP Conference Proceedings 606)
      Publication Date : 2001/00
      Volume,Number,Page : pp480-485
    • Electron Vortex Dynamics and Two-Dimensional Field Analysis
      Author : *K. Ito, Y. Kiwamoto, A. Sanpei
      Journal : in Non-neutral Plasma Physics IV (AIP Conference Proceedings 606)
      Publication Date : 2001/00
      Volume,Number,Page : pp.474-479
    • Dynamics of Electron-Plasma Vortex in Background Vorticity Distribution
      Author : *Y. Kiwamoto, K. Ito, A. Sanpei, A. Mohri
      Journal : Phys. Rev. Lett
      Publication Date : 2000/08
      Volume,Number,Page : Vol.85, 3173
    • Accelerated Merging of Electron Vortices in Background Vorticity
      Author : Yasuhito Kiwamoto, Kiyokazu Ito, Akio Sanpei, Akihiro Mohri, Tetsumori Yuyama, Toshinori Michishita
      Journal : J. Phys. Soc. Jpn.
      Publication Date : 1999/12
      Volume,Number,Page : vol.68, pp.3766-3769


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