Analytical Modeling of Magnetization Losses in Twisted Stacked HTS Conductors

Analytical Modeling of Magnetization Losses in Twisted Stacked HTS Conductors

The European post-ITER fusion demonstrator reactor (DEMO) design activities have been ongoing for several years in the framework of the EUROfusion Consortium. The designs proposed for the DEMOnstration Fusion Power Plants (DEMO) magnets include options based on high-temperature superconducting (HTS)...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity Vol. 33; no. 5; pp. 1 - 5
Main Authors: Macchiagodena, Antonio, Breschi, Marco, Buonafine, Deborah, De Marzi, Gianluca, Savoldi, Laura
Format: Journal Article
Language:English
Published: New York IEEE 01-08-2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
AC losses
Computational modeling
Conductors
DEMO
Fusion Magnets
High temperature
High-temperature superconductors
HTS stacks
Magnetization
Magnets
Mathematical models
Nuclear power plants
Slabs
Solenoids
Superconducting cables
Superconducting magnets
twisted stacked cable
Twisting
Two dimensional models
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Summary:The European post-ITER fusion demonstrator reactor (DEMO) design activities have been ongoing for several years in the framework of the EUROfusion Consortium. The designs proposed for the DEMOnstration Fusion Power Plants (DEMO) magnets include options based on high-temperature superconducting (HTS) technology, namely as an Insert in the Central Solenoid (CS). This work describes the development of tools for the calculation of magnetisation losses in a twisted-stacked HTS cable, which represents one of the most promising configurations of HTS fusion Cable-in-Conduit conductors (CICC). This geometry cannot be tackled with the straightforward application of 1D or 2D models, given their inability to describe the twisting of the tape stacks. However, the methodology proposed in this work allows one to treat the twisting of the conductors by discretizing them in a set of straight pieces. A set of analytical equations is developed to compute the instantaneous power losses in the slab approximation. This fast, easy-to-use, open-access tool, can be employed for the computation of AC losses in the central solenoid modules of a tokamak. In particular, we have applied the model to study the HTS insert of the DEMO central solenoid.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2023.3253063