Title :
High T/sub c/ wire design and power losses on cycling SMES devices
Author_Institution :
General Atomics, San Diego, CA, USA
Abstract :
The present state of the art in high T/sub c/ superconductors is projected to the kilometer-long wires needed for a superconducting magnetic energy storage (SMES) device. It is concluded that silver-clad-bismuth-based superconductor is the only form which is likely to be available in the near future. This wire should have a cross-section of approximately 1 cm/sup 2/ and carry 10 kA in fields up to 10 T. For satisfactory performance it must be made in the form of twisted multifilaments rather than the flat tape form which is presently receiving the most attention. In addition, detailed measurements of J/sub c/ as a function of field and temperature of the wire form as well as thermal conductivity and heat capacity are required in order to properly calculate the stability limits of the wire.<>
Keywords :
bismuth compounds; calcium compounds; composite superconductors; critical current density (superconductivity); eddy current losses; high-temperature superconductors; silver; strontium compounds; superconducting magnet energy storage; superconducting magnets; 10 T; 10 kA; Ag clad; BiSrCaCuO-Ag; critical current density; eddy current losses; heat capacity; high T/sub c/ superconductors; multifilamentary wires; power losses; stability limits; superconducting magnetic energy storage; thermal conductivity; twisted multifilaments; wire design; Conductivity measurement; Magnetic field measurement; Samarium; Superconducting devices; Superconducting magnetic energy storage; Superconductivity; Temperature; Thermal conductivity; Thermal stability; Wire;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
