Design, fabrication and test of the react and wind, Nb3Sn, LDX floating coil

Citation
Ba. Smith et al., Design, fabrication and test of the react and wind, Nb3Sn, LDX floating coil, IEEE APPL S, 11(1), 2001, pp. 2010-2013
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
1051-8223 → ACNP
Volume
11
Issue
1
Year of publication
2001
Part
2
Pages
2010 - 2013
Database
ISI
SICI code
1051-8223(200103)11:1<2010:DFATOT>2.0.ZU;2-N
Abstract
The Levitated Dipole Experiment (LDX) is an innovative approach to explore the magnetic confinement of fusion plasma. ii superconducting solenoid (flo ating coil) is magnetically levitated for up to 8 hours in the center of a 5-meter diameter vacuum vessel. The floating coil maximum field is 5.3 T, a nd a react-and-wind Nb3Sn conductor was selected to enable continued field production as the coil warms from 5 K during the experiment up to a final t emperature of about 10 K. The coil is wound using an 18-strand Rutherford c able soldered into a half-hard copper channel, and is self protected during quench. The;coil is insulated during winding and then vacuum impregnated w ith epoxy. The impregnated coil is tested with 2 kA operating current at 4. 2 K, and then a single, low resistance joint is formed at the outer diamete r of the coil. before the coil is enclosed in ifs toroidal helium vessel. T his paper presents details of the coil design and manufacturing procedures, with special attention to the techniques used to protect the coil from exc essive strain damage throughout the manufacturing process.