Advanced Modeling of Electromagnetic Loading of Cable-in-Conduit Conductors for Fusion Magnets - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue IEEE Transactions on Applied Superconductivity Année : 2020

Advanced Modeling of Electromagnetic Loading of Cable-in-Conduit Conductors for Fusion Magnets

Résumé

The electrical performance degradation of Nb 3 Sn cables in the Cable-in-Conduit Conductors CICC has been well documented in literature. The Nb 3 Sn composite strands exhibit a critical current density that strongly depends on the strain state of the superconducting filaments. During a fusion magnet operation, the conductors are submitted to several electromagnetic and thermal cycles affecting the Nb 3 Sn mechanical state and consequently the capacity of the conductors to transport current. Different studies based on both a macroscopic and microscopic approaches have been performed so far to identify the mechanisms determining the conductors' behavior. Nevertheless, no theory permitting to predict the electrical performance of cyclically loaded conductors has been developed yet. Therefore, a solid electromechanical model able to tackle the analysis of CICC for fusion cables when they undergo thousands of cyclic loadings would be very useful. In this paper an advanced mechanical model to study the mechanical behavior of ITER TF CICC based on an improved version of the MULTIFIL finite element code is presented. A correction is introduced to solve the problem of the large impact of the boundary conditions in the simulation of the thermal loading, encountered in a previous work. A novel methodology to identify the value of thermal strain to be applied in cool-down simulations has also been developed. The model was adapted to take into account the Lorentz force cumulative effect of the other petals on the one under analysis. An assessment of the electromagnetic behavior based on the mechanical analysis is also presented.
Fichier principal
Vignette du fichier
Riccioli2020.pdf (244.74 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02909285 , version 1 (08-09-2020)

Licence

Paternité

Identifiants

Citer

Rebecca Riccioli, Alexandre Torre, Damien Durville, Marco Breschi, Frédéric Lebon, et al.. Advanced Modeling of Electromagnetic Loading of Cable-in-Conduit Conductors for Fusion Magnets. IEEE Transactions on Applied Superconductivity, 2020, 30 (4), pp.1-5. ⟨10.1109/TASC.2020.2978463⟩. ⟨hal-02909285⟩
126 Consultations
147 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More