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Progressing in cable-in-conduit for fusion magnets: From ITER to low cost, high performance DEMO
- Source :
- Superconductor Science and Technology
- Publication Year :
- 2018
- Publisher :
- Institute of Physics Publishing, 2018.
-
Abstract
- The performance of ITER toroidal field (TF) conductors still have a significant margin for improvement because the effective strain between -0.62% and -0.95% limits the strands' critical current between 15% and 45% of the maximum achievable. Prototype Nb3Sn cable-in-conduit conductors have been designed, manufactured and tested in the frame of the EUROfusion DEMO activities. In these conductors the effective strain has shown a clear improvement with respect to the ITER conductors, reaching values between -0.55% and -0.28%, resulting in a strand critical current which is two to three times higher than in ITER conductors. In terms of the amount of Nb3Sn strand required for the construction of the DEMO TF magnet system, such improvement may lead to a reduction of at least a factor of two with respect to a similar magnet built with ITER type conductors; a further saving of Nb3Sn is possible if graded conductors/windings are employed. In the best case the DEMO TF magnet could require fewer Nb3Sn strands than the ITER one, despite the larger size of DEMO. Moreover high performance conductors could be operated at higher fields than ITER TF conductors, enabling the construction of low cost, compact, high field tokamaks. © 2018 IOP Publishing Ltd.
- Subjects :
- Tokamak
Materials science
Nuclear engineering
7. Clean energy
01 natural sciences
010305 fluids & plasmas
law.invention
Electrical conduit
law
ITER
0103 physical sciences
cable in conduit
DEMO
fusion magnet
Materials Chemistry
Electrical and Electronic Engineering
010306 general physics
Electrical conductor
Fusion
Metals and Alloys
Condensed Matter Physics
Electromagnetic coil
Magnet
Ceramics and Composites
High field
Critical current
Subjects
Details
- Language :
- English
- ISSN :
- 09532048 and 17426596
- Database :
- OpenAIRE
- Journal :
- Superconductor Science and Technology
- Accession number :
- edsair.doi.dedup.....c62e3b4fd86c12f69a3fe3690ada4741
- Full Text :
- https://doi.org/10.1088/1361-6668/aab3bf&partnerID=40&md5=934a05702e7f28a223aa557347b7d9cc