H. Ajikawa

TL;DR: In this article, the authors investigated the compatibility between the plasma and low activation ferritic steel, which is a candidate material for fusion demonstration reactors, and obtained a high normalized beta plasma of βN ~ 3, having both an internal transport barrier and a steady H-mode edge.

TL;DR: In this article, the authors proposed the concept of Force-Balanced Coil (FBC) which is a helically wound toroidal coil, which can minimize working stresses by selecting an optimal number of poloidal turns.

TL;DR: In this paper, a novel tokamak design with a new type of toroidal field (TF) coil and a central solenoid whose stress is reduced greatly to the theoretical limit determined by the virial theorem, has been devised, and plasma production and confinement experiments in a new small TOKAMak based on this design are presented.

TL;DR: In this paper, the authors proposed the concept of force-balanced coil (FBC) applied to superconducting magnetic energy storage (SMES) systems, which is a helical-winding torus coil that balances the centering force with the hoop force.

TL;DR: In this paper, a toroidal field (TF) coil with a central solenoid whose stress is reduced to a theoretical limit determined by the virial theorem is presented, where the helical winding is modulated in such a way that poloidal field exists only outside of a torus.