During the last decade, significant progress has been made in the field of pellet injection
with (1) the identification of the drift of the deposited material in the inhomogeneous …

In the first four years of the LHD experiment, several encouraging results have emerged, the
most significant of which is that MHD stability and good transport are compatible in the …

In this chapter, we consider generic issues affecting the implementation of diagnostics in a
burning plasma experiment (BPX). These are, directly or indirectly, caused by the radiation …

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) …

This paper assesses the three-dimensional (3D) effects of the edge magnetic field structure
on divertor/scrape-off layer transport, based on an inter-machine comparison of …

Control of the radial electric field, E r, is considered to be important in helical plasmas,
because the radial electric field and its shear are expected to reduce neoclassical and …

The ability to exhaust helium as the fusion born plasma impurity is a critical requirement for
burning plasmas. We demonstrate in this paper that resonant magnetic perturbation (RMP) …

In order to understand particle transport systematically in toroidal plasmas, electron density
profiles were compared in JT-60U tokamak and LHD helical plasmas with low collisionality …

Using the island divertors (IDs) of W7-AS and W7-X and the helical divertor (HD) of LHD as
examples, the paper presents a comparative divertor transport study for three typical helical …

With the ITER construction approaching, fusion devices have started to tackle the
technological and physical challenges associated with steady state operation. Significant …