First evaluation of cryogenic performance of Wendelstein 7-X cryostat

Wendelstein 7-X and fusion

The Set of Diagnostics for the First Operation Campaign of the Wendelstein 7-X Stellarator

Wendelstein 7-X (W7-X) is a large optimized stellarator (B=2.5T, V=30m) aiming at demonstrating the reactor relevance of the optimized stellarators. In summer this year (2015) W7-X will begin its first operation phase (OP1.1) with five inertially cooled inboard limiters made of graphite. Assuming the heat loads can be spread out evenly between the limiters, 1 second discharges at 2 MW of heatin...

Commissioning of the magnetic diagnostics during the first operation phase at Wendelstein 7-X

during the first operation phase at Wendelstein 7-X K. Rahbarnia1, T. Andreeva1, A. Cardella2, B.B. Carvalho3, M. Endler1, D. Hathiramani1, J. Geiger1, O. Grulke1, S. Lazerson4, U. Neuner1, J. Svensson1, H. Thomsen1, A. Werner1 and Wendelstein 7-X Team 1 Max-Planck Institute for Plasma Physics, Wendelsteinstr. 1, 17489 Greifswald, Germany 2 Fusion for Energy, Boltzmannstr. 2, 85748 Garching, Ge...

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 ...

Key results from the first plasma operation phase and outlook for future performance in Wendelstein 7-X

The first physics operation phase on the stellarator experiment Wendelstein 7-X was successfully completed in March 2016 after about 10 weeks of operation. Experiments in this phase were conducted with five graphite limiters as the primary plasma-facing components. Overall, the results were beyond the expectations published shortly before the start of operation [Sunn Pedersen et al., Nucl. Fusi...