Wendelstein 7-X-Commissioning of the Superconducting Magnet System

The Wendelstein 7-X stellarator (W7-X), one of the largest stellarator fusion experiments, is presently being taken into operation at the Max Planck Institute for Plasma Physics in Greifswald. The main objective of the experiment is to prove the reactor relevance of the optimized stellarator concept...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2016-06, Vol.26 (4), p.1-4
Main Authors: Risse, Konrad, Birus, Dietrich, Bosch, Stephan, Bykov, Victor, Carls, Andre, Dhard, Chandra P., Fellinger, Joris, Monnich, Thomas, Nagel, Michael, Otte, Matthias, Rummel, Thomas, Schneider, Matthias
Format: Article
Language:English
Subjects:
Buses (vehicles)
Circuits
Coils
Commissioning
Discharges (electric)
High-temperature superconductors
Magnetic circuits
Magnetic fields
Magnetism
Safety
Stellarator
Stellarators
Superconducting coils
Superconducting magnets
Superconductivity
Temperature gradient
Wendelstein 7-X
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Wendelstein 7-X stellarator (W7-X), one of the largest stellarator fusion experiments, is presently being taken into operation at the Max Planck Institute for Plasma Physics in Greifswald. The main objective of the experiment is to prove the reactor relevance of the optimized stellarator concept. The W7-X experiment has a superconducting magnet system with 50 nonplanar and 20 planar coils grouped in five equal modules, which are electrically connected in 7 circuits with 10 coils of each type. The connections between the coils are made by superconducting the bus bars using the same NbTi Cable-in-Conduit Conductor as used for the superconducting coils. Particularly developed high-temperature superconducting current leads feed the current into the cryostat by bridging the temperature gradient from room temperature down to the 4-K level. Seven power supplies provide individual currents in the seven circuits. The quench detection system permanently checks the superconducting system regarding the occurrence of a quench. In case of a quench, the magnet safety system has to be activated, and a set of switches lead the current into the dump resistors. The commissioning of the magnet system was successfully performed until July 2015 with tests of the complete magnet system functionality needed for plasma operation at a magnetic field of 2.5 T.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2016.2527245