Conveners
FRI-OR6-603 High Tc Wires and Cables II
- Naoyuki Amemiya
- Danko van der Laan (Advanced Conductor Technologies)
Cuprate high-temperature superconductors (HTS), such as RE-Ba2Cu3O7-d (REBCO, RE=rare earth) coated conductors, (Bi,Pb)2Sr2Ca2Cu3O10-x tapes and Bi2Sr2CaCu2O8-x wires, have enabled the development of high-field superconducting magnets. The brittle nature of HTS requires elaborate means to protect them against the high stresses associated with high-field magnet operation, which so far have...
Superconducting magnets designed for high energy physics and nuclear fusion require mechanical stabilization and electrical insulation to perform at high currents and magnetic fields. Vacuum pressure impregnation (VPI), a process of curing epoxy in and around the superconducting wires, is most commonly used to support and consolidate a magnet. However, the heat and mechanical stresses...
High current Rare-Earth Barium-Copper Oxides High Temperature Superconductor (HTS) Cable-In-Conduit (CIC) Conductor conceived for large fusion magnet applications based on aluminum slotted-core incorporating HTS tape stacks has been successfully proposed in the last years [1]. In this work, the activity carried out for designing and manufacturing CIC samples aimed at the investigations of...
As the high critical current at high field, the representative second-generation high-temperature superconductor (2G HTS) ReBCO serves as a good candidate for future fusion devices, i.e. the Chinese fusion engineering test reactor (CFETR), the Demonstration Power Station (DEMO) with magnet field higher than 15T. The main goal of CFETR is to build a fusion engineering tokamak reactor with a...
After more than 20 years of development, the manufacturing of high-temperature superconducting (2G-HTS) wire has been quite well established: a thin (1-2 microns) layer of YBCO superconductor epitaxially deposited on a biaxially aligned metal substrate. Such a conductor is very susceptible to current blocking defects. These defects are typically caused by mishandling of the tape between the...
Recent progress in superconducting joint technologies connecting coated conductors (RE123) [1] had triggered reconsideration of development of superconducting joints connecting Bi2223 tapes.
Through the systematic studies on polycrystalline Bi2223 thick films [2,3] and establishment of polishing technology with very low angle to expose most of the filaments in Bi2223 tapes, we succeeded in...
We have succeeded in measuring critical current, Ic, in multi-filamentally Bi-2223 tapes at extremely low electric-field criterion down to at around 10^-13 V/m, at 5 K and external magnetic fields up to 4.5 T perpendicular to the tape surface which is comparable to the operation condition of Bi-2223 based insert magnet for 30 T-class NMR magnet in persistent mode operation. While the Ic of the...
MgB$_2$ superconducting wires hold the advantage over traditional NbTi wires of higher temperature operation, at lower cost than REBCO tapes, and allowing the use of existing winding techniques. The adoption of MgB$_2$ wires into large-scale applications such as MRI solenoid magnets, long-length power cables, wind turbine generators or industrial magnets requires a robust production process...
