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
- A. Ito and N. Nakajima:
Magnetic flux coordinates in equilibrium with flow, submitted to Physics of Plasmas.
- 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).
- A. Ito and J. J. Ramos:
Two-fluid tearing mode instability in cylindrical geometry, Physics of Plasmas Vol.24, 072102 (2017).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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
- 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).
- 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
- 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
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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).
- 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.
- 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
- 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
- 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.
- 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.
- 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.
- 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.
- 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.
- A. Ito:
Kelvin-Helmholtz instability in Beltrami fields
Workshop on Theoretical Plasma Astrophysics, 11-22 November 2002,
ICTP, Trieste, Italy.
- 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.
- A. Ito:
Stability of a plasma with strong shear flow
Autumn College on Plasma Physics,
8 October - 2 November 2001, ICTP, Trieste, Italy.
- 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