Spatial homogeneity is one of the most important requirements of REBCO coated conductors (CCs) for practical applications. We demonstrated automatic detection of local obstacles in a PLD processed long length REBCO CC by introducing image classification based on machine learning into reel-to-reel scanning Hall-probe magnetic microscopy [1, 2]. This allows us to classify magnetic images...
High magnetic fields of up to 20 T in tokamak-type fusion devices, such as in Central Solenoids of European DEMO and the Chinese BEST fusion reactors, require High-Temperature Superconductors (HTS). Among the potential candidates, ReBCO tape has emerged as a promising choice. However, the substantial Lorentz forces in these environments can lead to localized mechanical stress, which can...
Characterizing Second-Generation High-Temperature Superconductors (2G-HTS) or REBCO Coated Conductors (CC) (RE = Rare Earth, Barium, Copper Oxide) requires multi-modal approaches to evaluate critical current density (Jc), chemical and structural uniformity, and defect distribution. Laboratory-scale methods are often limited in speed and throughput, limiting their viability for quality control...
Previous simulations have shown that the current sharing level decreases with increasing defect density in the middle layer of a three-layer stack cable. Earlier studies focused on a five-layer YBCO tape structure composed of copper, silver, YBCO, Hastelloy, and copper. However, in real-world applications, the buffer layer exists between YBCO and Hastelloy, which has not been accounted for in...
GdBCO, EuBCO and YBCO tapes were irradiated at Japan Research Reactor #3. The samples were bundled and wrapped with cadmium foil with 25 m thick. The first bundle was wrapped with aluminum foil and no cadmium foil. The second bundle was wrapped with three turns (75 m) of cadmium foil and the third was wrapped with five turns (125 m) of cadmium foil. The maximum thermal neutron and the fast...
