Manufacture and test of the non-planar coils for WENDELSTEIN 7-X

摘要

The stellarator WENDELSTEIN 7-X, a superconducting fusion experiment, is presently under construction at the Greifswald branch of the Max-Planck-lnstitut fuer Plasmaphysik (IPP). The standard magnetic configuration of WENDELSTEIN 7-X (W7-X) is formed by 50 non-planar superconducting coils. Twenty additional planar superconducting coils can modify the magnetic configuration. This paper describes the production of the non-planar coils including the production of the winding packs, the cases and the assembly procedure of the coils. Five coils are already finished and tested at room temperature at the manufacturer's site. All coils will also be tested under cryogenic conditions. The main tests are at nominal current, a quench test by increasing the temperature of the helium, a high voltage test, a pressure and a helium leak test, the measurement of the shrinkage during cool down and the deformations due to electromagnetic forces. The test procedure and the results of the first tests of the coils are also presented.