Plasmas are created by heating gases through the absorption of ionizing radiation in the
visible through the ultraviolet part of the electromagnetic spectrum and through collisional …

Two-dimensional phase contrast imaging (2D) installed on the large helical device (LHD) is
a unique diagnostic for local turbulence measurements. A 10.6 μ m infrared CO 2 laser and …

High-power negative and positive ion-based neutral beam injectors (NBIs) are operated with
high reliability in the Large Helical Device (LHD). The total injection power is> 20 MW, and …

Remarkable progress in the physical parameters of net-current free plasmas has been made
in the Large Helical Device (LHD) since the last Fusion Energy Conference in Chengdu …

Feasibility studies on applying high-temperature superconductors (HTS) to the heliotron-
type fusion energy reactor FFHR are being carried out. Using HTS, we consider that the …

Recent activities on optimizing the base design of the large helical device (LHD)-type helical
reactor FFHR (force free helical reactor) are presented. Three candidates to secure the …

We present a topical review of the detailed experimental investigations of the Electron
Temperature Gradient (ETG) instability-induced turbulence and associated transport that …

An attractive high-density operational regime which is a so-called internal diffusion barrier
(IDB) has been discovered in a helical divertor configuration on the Large Helical Device …

A relatively simple dynamic model of low-frequency plasma convection is proposed to
simulate turbulent cross-field transport in the tokamak core. The model is based on a special …

This study deals with the equilibrium beta limit for high-beta plasmas of the Large Helical
Device using a 3D equilibrium calculation code, HINT, which is an initial value solver based …