M
Masafumi Azumi
Researcher at Japan Atomic Energy Agency
Publications - 113
Citations - 2631
Masafumi Azumi is an academic researcher from Japan Atomic Energy Agency. The author has contributed to research in topics: Tokamak & Plasma. The author has an hindex of 29, co-authored 113 publications receiving 2538 citations. Previous affiliations of Masafumi Azumi include Japan Atomic Energy Research Institute & Kyushu University.
Papers
More filters
Journal ArticleDOI
Effect of Toroidal Field Ripple on Fast Ion Behavior in a Tokamak
TL;DR: In this article, the authors performed computational studies for fast ion behavior in a Tokamak with toroidal field ripple and classified the fast ion loss associated with ripple into two groups; ripple-trapped loss and banana-drift loss.
Journal ArticleDOI
Physics of energetic ions
J. Jacquinot,S. Putvinski,G. Bosia,Atsushi Fukuyama,R. Hemsworth,Sergey Konovalov,Yoshihiko Nagashima,W. M. Nevins,K. Rasumova,Francesco Romanelli,Kenji Tobita,Kenkichi Ushigusa,J. W. Van Dam,V. Vdovin,Herbert L Berk,D. N. Borba,Boris Breizman,R.V. Budny,Jeff Candy,Chio-Zong Cheng,C. D. Challis,Ambrogio Fasoli,Guoyong Fu,W. W. Heidbrink,Raffi Nazikian,G. Martin,Francesco Porcelli,M. H. Redi,Marshall N. Rosenbluth,G.J. Sadler,S. E. Sharapov,Donald A. Spong,Ryan M. White,Fulvio Zonca,F. W. Perkins,Douglass E. Post,Nermin A. Uckan,Masafumi Azumi,David Campbell,N. Ivanov,N. R. Sauthoff,Masahiro Wakatani,M. Shimada,J. Van Dam +43 more
TL;DR: In this paper, a review of the physics knowledge relevant to design of a reactor scale tokamak is presented, and projections for ITER are provided in this Chapter of the ITER Physics Basis.
Journal ArticleDOI
Numerical analysis of 2D MHD equilibrium with non-inductive plasma current in tokamaks
TL;DR: In this paper, the authors developed a numerical code to investigate steady state neutral-beam-driven, ohmic and bootstrap currents which are consistent with MHD equilibrium, which can describe the effects of mirror trapping, energy diffusion, and bounce motion of fast ions on the beam-driven current.
Journal ArticleDOI
Structure-driven nonlinear instability of double tearing modes and the abrupt growth after long-time-scale evolution.
TL;DR: The new nonlinear destabilization process is found in the nonlinear phase of the double tearing mode (DTM) and causes the abrupt growth of DTM and subsequent collapse after long-time-scale evolution in the Rutherford-type regime.
Journal ArticleDOI
Bootstrap current during perpendicular neutral injection in JT-60
TL;DR: In this paper, the experimental resistive loop voltages are compared with the calculations, using the neoclassical resistivity, with and without the bootstrap current, and the Spitzer resistivity for a wide range of plasma current.