Project objectives
The SF-Cond project aims to develop high-current conductors based on high-temperature superconductors (HTS) for magnetic confinement fusion applications. The aim is to design, prototype, test and qualify multi-strand conductors capable of carrying currents of up to 80 kA in their entirety under high magnetic fields (20 T), while guaranteeing high mechanical strength and efficient cryogenic cooling, for safe and stable operation.
Scientific background
Until now, applications using High Temperature Superconductors (HTS) have mainly used one- or two-strip windings, enabling the transport of a few hundred to a thousand amperes.
However, to achieve high magnetic fields, and in particular for large magnets for magnetic fusion, the use of a single ribbon becomes insufficient and inadequate.
Scientific and technological challenges
Improving the transport of high currents
Develop HTS conductors capable of carrying tens of thousands of amperes, essential for fusion magnets.
Creating multi-strand coils
Design multi-strand architectures to distribute current and limit local failures.
Validate drivers under real-life conditions
Test conductors in environments simulating the extreme stresses of fusion: intense magnetic fields, high currents, cryogenic cooling.
Developing industrial applications
Ensure reliable, cost-effective industrial production for applications such as fusion reactors, high-performance MRIs and superconducting power grids.
Partners involved
This project is being carried out in collaboration with several laboratories and research centers
CEA (IRFM, IRFU)
General coordination, conductor design and prototyping, expertise in fusion magnets and cryogenic testing.
CNRS (NEEL, LNCMI)
Study and modeling of HTS ribbons, analysis of quench phenomena. Tests of conductors and ribbons under high magnetic fields up to 20 T.
AMU (LMA)
Multi-scale modeling and mechanical testing of composite conductors and structures.
CentraleSupélec (LMPS)
Numerical simulation and modeling of the mechanical behavior of superconducting cables.
University of Lorraine (GREEN)
AC loss modeling and experimental testing of HTS conductors
ENSI-Caen
Study of materials and non-destructive testing (NDT) techniques to ensure that the HTS conductors developed meet stringent performance and safety requirements.
Project challenges
From small to large scale
From high fields on small prototypes to large magnets (1-2 m) with 100 MJ, overcoming the challenges of Lorentz forces and thermomechanical constraints.
Controlling cumulative effects
Manage potential defects such as delamination of REBCO ribbons, weak points due to heat treatment and mechanical assembly stresses.
Technology industrialization
Ensure compatibility with industrial tools, produce reliable conductor lengths and guarantee rigorous quality control.
Methodology and approach
01
Review and analysis
Study existing conductors, define key performances and identify specific needs for fusion magnets.
02
Innovations and tests
Propose innovative designs, build prototypes and test them under real-life conditions (high fields, cryogenics).
03
Synergy with SupraFusion projects
Collaborate with other program projects to integrate advances in materials, magnet protection and fusion system design.