Conveners
Tue-Mo-Or8 - High Tc Wires and Cables I
- Drew Hazelton (SuperPower Inc.)
- Venkat Selvamanickam (University of Houston)
ABSTRACT BODY:
HTS tapes, because of their widths and large shape aspect ratios, have not been readily manufacturable into Rutherford or Roebel cables, even though these kinds of cables are required for many large coil applications. A type of transposed Roebel cable is under development with 2G tape, but its design flexibility is very limited, and its processing very complex, as well as...
Advanced Conductor Technologies is developing high-temperature superconducting Conductor on Round Core (CORC®) cables and wires wound from REBCO coated conductors for use in high-field magnets. Magnet applications on which the conductor development is focused on include compact fusion magnets that operate at currents between 50 and 100 kA at fields of 12 – 20 T and accelerator magnets that...
Brookhaven National Laboratory (BNL) is building a 25 T, 100 mm cold bore HTS solenoid for the Center for Axion and Precision Physics (CAPP) at the Institute for Basic Science (IBS) in Korea to be used in their search for Dark Matter Axions. The magnet is wound using - Second Generation (2G) High Temperature Superconductor (HTS) tape from SuperPower. The combination of high magnetic field (>20...
The use of REBCO inner coils is a promising option for developing high-field magnets since the coil can be designed at high-hoop stress typically at >400 MPa. Such a coil, however, sometimes suffers from the appearance of a normal voltage even at medium hoop stress such as 200 MPa, i.e., unexpected degradation [1]. We believe that those degradations are caused by strong electromagnetic forces...
Rare Earth-Barium-Copper-Oxide (REBCO) coated conductor (CC) tapes are promising conductors for high energy and high field applications. In the case of epoxy-impregnated REBCO superconducting coils, however, excessive transverse stresses generated from cooling, and Lorentz forces on the CC tapes can cause delamination, resulting in reductions in the load-carrying capacity as well as...
Recently, we developed a superconducting joint between two multi-filamentary Bi2223 tapes with the joint by incongruent melting (JIM) method [1]. During the incongruent melting process, Bi2223 phase is separated to Bi2212, Bi2201, and liquid phases. Since the Bi2212 is also high-temperature superconductor, the superconducting joint can be obtained without recrystallization of Bi2223 from the...
For realizing HTS magnets equipped with a persistent current circuit, the development of superconducting joints between HTS tapes with enough large current capacity in external magnetic fields is indispensable. On the other hand, the Ag-sheathed Bi2223 (Bi2223/Ag) commercial tapes, DI-BSCCO, show high critical current (Ic) characteristics of ~ 200 A at 77 K in self-field and...
New high temperature superconductor (HTS) technology is actively being pursued to achieve fields beyond those available with the present Nb3Sn technology (~23 T). In an effort to further drive Bi2Sr2CaCu2O8-δ (Bi 2212) round wire technology, better understanding of the performance of coils wound with this conductor is paramount. Work presented in this body demonstrates that the limiting strain...
