New capabilities including radio-frequency (RF) powers and diagnostics have been
developed since the last IAEA meeting. Divertor performance has been systematically …

A significant improvement of plasma parameters in the optimized stellarator W7-X is found
after injections of frozen hydrogen pellets. The ion temperature in the post-pellet phase …

A quasiperiodic Er oscillation at a frequency of< 4 kHz, much lower than the geodesic-
acoustic-mode frequency, with a modulation in edge turbulence preceding and following the …

The fundamental behavior of the W7-X island divertor under detached conditions, which has
been theoretically predicted with the EMC3-Eirene code, is re-examined here under the …

An electrostatic coherent mode near the electron diamagnetic frequency (20–90 kHz) is
observed in the steep-gradient pedestal region of long pulse H-mode plasmas in the …

With theoretical prediction and experimental validation, we propose a novel approach to
significantly enhance the conversion efficiency of thermoacoustic (TA) imaging by using an …

Abstract Wendelstein 7-X (W7-X) is currently under commissioning in preparation for its
initial plasma operation phase, operation phase 1.1 (OP1. 1). This first phase serves …

The kinetic energy transfer between shear flows and the ambient turbulence is investigated
in the Experimental Advanced Superconducting Tokamak during the LH transition. As the …

Nonlinear simulations based on multiple NSTX discharge scenarios have progressed to
help differentiate unique instability mechanisms and to validate with experimental …

During the two most recent experimental campaigns in the advanced stellarator Wendelstein
7-X (W7-X)(Klinger et al 2017 Plasma Phys. Control. Fusion 59 014018; Bosch et al 2017 …