Abstract The Large Helical Device (LHD) Thomson scattering system measures electron
temperature and density profiles of LHD plasmas along the LHD major radius at a …

Wendelstein 7-X is a highly optimized stellarator that went into operation in 2015. With a 30
cubic meter volume, a superconducting coil system operating at 2.5 T, and steady-state …

This paper generally compares the essential features between tokamaks and stellarators,
based on previous review work individually made by authors on several specific topics, such …

Abstract The Large Helical Device (LHD) is a heliotron-type device employing large-scale
superconducting magnets to enable advanced studies of net-current-free plasmas. The …

The large helical device (LHD) is one of the world's largest superconducting helical system
fusion-experiment devices. Since the start of experiments in 1998, LHD has extended its …

In stellarators, increasing the density is beneficial for the energy confinement. While there is
no single reason for this observation, it is still very robust across different devices and this is …

Abstract The Large Helical Device (LHD) and Wendelstein 7-X (W7-X, under construction)
are experiments specially designed to demonstrate long-pulse (quasi steady state) …

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 …

The physical understanding of net-current-free helical plasmas has progressed in the Large
Helical Device (LHD) since the last Fusion Energy Conference in Geneva, 2008. The …

Particle confinement processes are studied in detail on the Large Helical Device (LHD).
Diffusion coefficients (D) and convection velocities (V) are estimated from density …