Characterization of a high-temperature superconducting conductor on round core cables in magnetic fields up to 20 T
The next generation of high-ï¬eld magnets that will operate at magnetic ï¬elds substantially above 20 T, or at temperatures substantially above 4.2 K, requires high-temperature superconductors (HTS). Conductor on round core (CORC) cables, in which RE-Ba{sub 2}Cu{sub 3}O{sub 7-{delta}} (RE = rare earth) (REBCO) coated conductors are wound in a helical fashion on a flexible core, are a practical and versatile HTS cable option for low-inductance, high-field magnets. We performed the first tests of CORC magnet cables in liquid helium in magnetic fields of up to 20 T. A record critical current I{sub c} of 5021 A was measured at 4.2 K and 19 T. In a cable with an outer diameter of 7.5 mm, this value corresponds to an engineering current density J{sub e} of 114 A mm{sup -2} , the highest J{sub e} ever reported for a superconducting cable at such high magnetic fields. Additionally, the first magnet wound from an HTS cable was constructed from a 6 m-long CORC cable. The 12-turn, double-layer magnet had an inner diameter of 9 cm and was tested in a magnetic field of 20 T, at which it had an I{sub c} of 1966 A. The cables were quenched repetitively without degradation during the measurements, demonstrating the feasibility of HTS CORC cables for use in high-field magnet applications.
- Research Organization:
- Advanced Conductor Technologies LLC, Boulder, CO (United States)
- Sponsoring Organization:
- USDOE SC Office of Fusion Energy Sciences (SC-24); USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- SC0007660
- OSTI ID:
- 1076558
- Report Number(s):
- DOE/SC0007660-2
- Journal Information:
- Superconductor Science and Technology, Vol. 26, Issue 4; ISSN 0953-2048
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
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