The new W7-X logbook – A software for effective experiment documentation and collaborative research at Wendelstein 7-X

A New Dispersion Interferometer for the Stellarator Wendelstein 7-X

Wendelstein 7-X and fusion

Design and Calibration of a Polychromator for the Thomson Scattering at Wendelstein 7-X

On Wendelstein 7-X, electron density and electron temperature profiles are planned to be measured by Thomson scattering. The specific system employs fiber bundles for the scattered light which is detected by means of a five-channel polychromator system. The detection system is assembled and its components are characterized. A calibration technique employing a super-continuum light source is ass...

The construction of the Wendelstein 7-X stellarator

The construction status of the large superconducting stellarator Wendelstein 7-X is reported. The manufacturing and tests of the main components are reviewed and major design tasks during the device assembly phase are summarized. The assembly is currently proceeding on three out of five assembly stands. Four out of ten magnet half-modules are completed. Major work packages are the electric and ...

Wall Conditioning by ECRH and GDC at the Wendelstein 7-X Stellarator

Wall conditioning in magnetic controlled fusion devices is a common tool to improve plasma performance and discharge reproducibility [1]. It will be relied upon in the next W7-X operation phases (OP1.2 in 2017-2018 and OP2 starting in 2020) to control the surface state of the plasmafacing components (PFC) with the eventual aim of providing access to continuous discharge operation [2]. The super...