Research on magnetic confinement of high-temperature plasmas has the ultimate goal of
harnessing nuclear fusion for the production of electricity. Although the tokamak is the …

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 …

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 …

The neoclassical transport optimization of the Wendelstein 7-X stellarator has not resulted in
the predicted high energy confinement of gas fueled electron-cyclotron-resonance-heated …

Pulsed injections of boron carbide granules into Wendelstein 7-X stellarator (W7-X) plasmas
transiently increase the plasma stored energy and core ion temperatures above the …

The Charge Exchange Recombination Spectroscopy (CXRS) diagnostic has become a
routine diagnostic on almost all major high temperature fusion experimental devices. For the …

The island divertor concept is an innovative and promising idea to handle heat and particle
exhaust in stellarators. At the Wendelstein 7-X (W7-X) stellarator, this divertor concept plays …

The transport of heavy impurities has been investigated at the Wendelstein 7-X stellarator
during core electron root confinement (CERC) experiments. Iron atoms were injected via the …

The magnetic diagnostic system at the Wendelstein 7-X stellarator includes three
diamagnetic loops to measure magnetic flux changes in the plasma. Their signals are …

Abstract In the Wendelstein 7-X (W7-X) stellarator, turbulence is the dominant transport
mechanism in most discharges. This leads to a'clam**'of ion temperature over a wide …