Atsushi Ito

Assistant Professor
Fundamental Physics Simulation Research Division
Department of Helical Plasma Research
National Institute for Fusion Science, Japan
E-mail:
[In Japanese]

Research

Theoretical plasma physics (equilibrium, waves, instabilities, and shear flows).

Peer-Reviewed Journal Articles

  1. A. Ito and J. J. Ramos: Numerical analysis of two-fluid tearing mode instability in a finite aspect ratio cylinder, Physics of Plasmas Vol.25, 012117 (2018).
  2. A. Ito and J. J. Ramos: Two-fluid tearing mode instability in cylindrical geometry, Physics of Plasmas Vol.24, 072102 (2017).
  3. A. Ito and H. Miura: Parameter dependence of two-fluid and finite Larmor radius effects on the Rayleigh-Taylor instability in finite beta plasmas, Physics of Plasmas Vol.23, 122123 (2016).
  4. R. Goto, H. Miura, A. Ito, M. Sato and T. Hatori: Formation of large-scale structures with sharp density gradient through Rayleigh-Taylor growth in a two-dimensional slab under the two-fluid and finite Larmor radius effects, Physics of Plasmas Vol.22, 032115 (2015).
  5. R. Goto, H. Miura, A. Ito, M. Sato and T. Hatori: Hall and Gyro-Viscosity Effects on the Rayleigh-Taylor Instability in a 2D Rectangular Slab, Plasma and Fusion Research Vol.9, 1403076 (2014).
  6. A. Ito and N. Nakajima: Analytic Equilibria of High-Beta Tokamaks with Toroidal and Poloidal Flows and Pressure Anisotropy Associated with Parallel Heat Flux, Journal of the Physical Society of Japan Vol.82, 064502 (2013).
  7. A. Ito and N. Nakajima: Equilibria of toroidal plasmas with toroidal and poloidal flow in high-beta reduced magnetohydrodynamic models, Nuclear Fusion Vol.51, 123006-1 - 123006-11 (2011).
  8. A. Ito and N. Nakajima: Analytic high-beta tokamak equilibria with poloidal-sonic flow, Plasma Physics and Controlled Fusion Vol.51, 035007-1 - 035007-18 (2009).
  9. A. Ito, J. J. Ramos, and N. Nakajima: High-Beta Axisymmetric Equilibria with Flow in Reduced Single-Fluid and Two-Fluid Models, Plasma and Fusion Research Vol.3, 034-1 - 034-7 (2008).
  10. T. Kaneko, S. Tamura, A. Ito, and R. Hatakeyama: Drift-Wave Instabilities Modified by Parallel and Perpendicular Flow Velocity Shears in Magnetized Plasmas, Plasma and Fusion Research Vol.3, S1011-1 - S1011-5 (2008).
  11. A. Ito, J. J. Ramos, and N. Nakajima: Ellipticity of axisymmetric equilibria with flow and pressure anisotropy in single-fluid and Hall magnetohydrodynamics, Physics of Plasmas Vol.14, Iss.6, 062502-1 - 062502-8 (2007).
  12. Y. Todo and A. Ito: Construction of a Gyrokinetic Plasma Simulation Model for Electromagnetic Phenomena, Plasma and Fusion Research Vol.2, 020-1 - 020-5 (2007).
  13. A. Ito, A. Hirose, S. M. Mahajan, and S. Ohsaki: Remarks on the discrete Alfven wave spectrum induced by the Hall current, Physics of Plasmas Vol.11, Iss.12, pp.5643-5647 (2004).
  14. A. Hirose, A. Ito, S. M. Mahajan, and S. Ohsaki: Relation between Hall-magnetohydrodynamics and the kinetic Alfven wave, Physics Letters A Vol.330, Iss.6, pp.474-480 (2004).
  15. A. Ito and A. Hirose: Eigenmode of ion acoustic instability in the presence of sheared parallel flow, Physics of Plasmas Vol.11, Iss.1, pp.23-27 (2004).
  16. T. Suzuki, A. Ito, and Z. Yoshida: Statistical model of current filaments in a turbulent plasma, Fluid Dynamics Research Vol.32, Iss.6, pp.247-260 (2003).
  17. Z. Yoshida, S. Ohsaki, A. Ito and S. M. Mahajan: Stability of Beltrami flows, Journal of Mathematical Physics Vol.44, Iss.5, pp.2168-2178 (2003).
  18. A. Ito, Z. Yoshida, T. Tatsuno, S. Ohsaki, and S. M. Mahajan: Kelvin-Helmholtz instability in Beltrami fields, Physics of Plasmas Vol.9, Iss.12, pp.4856-4862 (2002).
  19. A. Ito and Z. Yoshida: Resonant production of secondary electrons generating a discrete energy structure in a magnetized electron beam system, Physical Review E Vol.63, 026502, pp.1-5 (2001).

Conference Proceedings

  1. A. Ito and N. Nakajima: Equilibrium and Stability of High-beta Toroidal Plasmas with Toroidal and Poloidal Flow in Reduced Magnetohydrodynamic Models, Proceedings of 23rd IAEA Fusion Energy Conference, THC/P5-03 (2010).
  2. A. Ito and N. Nakajima: Effects of finite Larmor radius on equilibria with flow in reduced two-fluid models, Theory of Fusion Plasmas, AIP Conference Proceedings Vol.1069, pp.121-132 (2008).

Invited Talks

  1. A. Ito, J. J. Ramos, and N. Nakajima: Effects of Finite Larmor Radius on Equilibria with Flow in Reduced Two-Fluid Models
    Joint Varenna - Lausanne International Workshop on "Theory of Fusion Plasmas", Villa Monastero, Varenna, Italy, August 25-29, 2008.

Conference Contributions

  1. A. Ito and J. J. Ramos: Two-fluid tearing mode instability in cylindrical geometry
    JpGU-AGU Joint Meeting 2017, May 20-25, 2017, Chiba, Japan.
  2. A. Ito, R. Goto, T. Hatori, H. Miura and M. Sato: Parameter dependence of two-fluid and finite Larmor radius effects on Rayleigh-Taylor and Kelvin-Helmholtz instabilities in finite beta plasmas
    2015 International Sherwood Fusion Theory Conference, March 16-18, 2015, New York, U.S.
  3. A. Ito and J. J. Ramos: Effect of parallel heat flux in the gyroviscous tensor on tearing mode instability in two-fluid magnetohydrodynamic model
    56th Annual Meeting of the APS Division of Plasma Physics, October 27-31, 2014, New Orleans, Louisiana, U.S.
  4. A. Ito and N. Nakajima: Magnetic flux coordinates for high-beta tokamak equilibria with flow
    56th Annual Meeting of the APS Division of Plasma Physics, October 27-31, 2014, New Orleans, Louisiana, U.S.
  5. A. Ito and N. Nakajima: Stability analysis of toroidal equilibria with flow in the high-beta reduced magnetohydrodynamic model
    23rd International Toki Conference, November 18-21, 2013, Toki, Gifu, Japan.
  6. A. Ito and N. Nakajima: Toroidal Equilibria with Flow in High-Beta Reduced Magnetohydrodynamic Models
    12th Asia Pacific Physics Conference of AAPPS, July 14-19, 2013, Chiba, Japan.
  7. A. Ito, R. Goto, T. Hatori, H. Miura and M. Sato: Eigenmode analysis of Rayleigh-Taylor and Kelvin-Helmholtz instabilities in the extended MHD model
    2013 International Sherwood Fusion Theory Conference, April 15-17, 2013, La Fonda on the Plaza, Santa Fe, NM, U.S.
  8. A. Ito, R. Goto, T. Hatori, H. Miura and M. Sato: Eigenmode analysis of Kelvin-Helmholtz/Rayleigh- Taylor instability based on the extended MHD model
    22nd International Toki Conference, November 19-22, 2012, Toki, Japan.
  9. A. Ito and N. Nakajima: Numerical analysis of axisymmetric toroidal equilibria with flow in single-fluid and two-fluid MHD models
    21th International Toki Conference, November 28-December 1, 2011, Toki, Japan.
  10. A. Ito and N. Nakajima: Equilibria with flow and pressure anisotropy in high-beta reduced MHD models
    20th International Toki Conference, December 7-10, 2010, Toki, Japan.
  11. A. Ito and N. Nakajima: Toroidal equilibria with flow and pressure anisotropy in high-beta reduced MHD models
    The 52nd Annual Meeting of the Division of Plasma Physics, the American Physical Society, November 8-12, 2010, Chicago, IL, U.S.
  12. A. Ito and N. Nakajima: Equilibrium and Stability of High-beta Toroidal Plasmas with Toroidal and Poloidal Flow in Reduced Magnetohydrodynamic Models
    23rd IAEA Fusion Energy Conference, October 11-16, 2010, Daejeon, Korea.
  13. A. Ito and N. Nakajima: Equilibrium and stability of toroidal plasmas with poloidal sonic flow
    19th International Toki Conference, December 8-11, 2009, Toki, Japan.
  14. A. Ito and N. Nakajima: Equilibria based on reduced two-fluid equations with flow and finite ion temperature
    7th General Scientific Assembly of the Asia Plasma and Fusion Association and Asia-Pacific Plasma Theory Conference, October 27-30, 2009, Aomori, Japan.
  15. A. Ito and N. Nakajima: Analytic high-beta tokamak equilibria with poloidal-sonic flow and their stability
    4th IAEA Technical Meeting on the Theory of Plasma Instabilities, Kyoto, Japan, May 18-20, 2009.
  16. A. Ito and N. Nakajima: High-beta toroidal equilibria with flow in reduced fluid models
    18th International Toki Conference, Toki, Japan, December 9-12, 2008 (Proceedings, p.184-187).
  17. A. Ito, J. J. Ramos, and N. Nakajima: Axisymmetric equilibria with flow in reduced two-fluid models
    Joint Conference of 17th International Toki Conference on Physics of Flows and Turbulence in Plasmas and 16th International Stellarator/Heliotron Workshop, Toki, Japan, October 15-19, 2007 (Proceedings, p.611-614).
  18. A. Ito, J. J. Ramos, N. Nakajima: Axisymmetric equilibrium with flow and pressure anisotropy in Hall MHD
    The 48th Annual Meeting of the Division of Plasma Physics, the American Physical Society, October30-November 3, 2006, Philadelphia, PA, U.S.
  19. A. Ito: Toroidal Hall MHD equilibrium with flow and anisotropic pressure
    US-Japan Workshop on Physics of Sustainment and Self-organization of Compact Torus Plasmas, September 14-16, 2005, Himeji, Japan
  20. A. Ito: Kinetic effects on Hall MHD waves
    19th International Conference an Numerical Simulation of Plasmas and 7th Asia Pacific Plasma Theory Conference, July 12-15, 2005, Nara, Japan
  21. A. Ito, A. Hirose, S.M. Mahajan, and S. Ohsaki: Kinetic Alfven wave in Hall magnetohydrodynamics
    2005 Transport Task Force Meeting, April 6-9, 2005, Napa, CA, U.S.
  22. A. Ito, A. Hirose, S.M. Mahajan, and S. Ohsaki: The discrete Alfven wave induced by the Hall current
    The 46th Annual Meeting of the Division of Plasma Physics, the American Physical Society, November 15-19, 2004, Savannah, GA, U.S.
  23. A. Ito, A. Hirose, S. Ohsaki, and S.M. Mahajan: Discrete Alfven wave spectra due to Hall current
    The 59th Canadian Association of Physicists Annual Congress, June 13-16, 2004, Winnipeg, MB, Canada.
  24. A. Ito and A. Hirose: Eigenmode of ion acoustic instability in the presence of sheared parallel flow
    The 45th Annual Meeting of the Division of Plasma Physics, the American Physical Society, 27-31 October 2003, Albuquerque, NM, U.S.
  25. A. Ito and A. Hirose: Nonlocal analysis of ion acoustic instability with sheared parallel flow
    The 58th Canadian Association of Physicists Annual Congress, June 8-11 2003, University of Prince Edward Island, Charlottetown, PEI, Canada.
  26. A. Ito: Kelvin-Helmholtz instability in Beltrami fields
    Workshop on Theoretical Plasma Astrophysics, 11-22 November 2002, ICTP, Trieste, Italy.
  27. A. Ito: Stability of a plasma with strong shear flow
    US-Japan Workshop on Sheared Flows, 8-11 January 2002, Univ. of Texas at Austin, Austin, Texas, U.S.
  28. A. Ito: Stability of a plasma with strong shear flow
    Autumn College on Plasma Physics, 8 October - 2 November 2001, ICTP, Trieste, Italy.
  29. A. Ito: Discrete Structure in the Energy Spectrum of Electron Beam Propagating in a Magnetic Field
    Autumn College on Plasma Physics, 25 October - 19 November 1999, ICTP, Trieste, Italy.

Fundamental Physics Research Division, NIFS