Title :
Considerations for practical conductor design of Chevrel phase wires
Author :
Seeber, B. ; Herrmann, P. ; Schellenberg, L. ; Zuccone, J.
Author_Institution :
Inst. of Appl. Phys., Geneva Univ., Switzerland
fDate :
3/1/1991 12:00:00 AM
Abstract :
It is noticed that the application of PbMo6S8 (PMS) wires for the generation of steady-state magnetic fields in excess of 20 T requires that several conditions be fulfilled in order to be realistic. Practical design considerations for PbMo6S8 wires are reported. Besides the availability of wires with sufficient lengths and uniform high critical current density Jc, thermal and mechanical stability have to be achieved. The most severe criterion for thermal stability is based on the prevention of flux jumps in the presence of screening currents in the adiabatic limit. This results in filament diameters between 710 μm and 90 μm for critical current densities of 5×108 A/m2 and 2×109 A/m2, respectively. A dynamic stabilization of a PMS wire in an epoxy-impregnated coil is not very efficient. The behavior of the Jc of PbMo6S8 wires under tensile and compressive stress is discussed
Keywords :
critical current density (superconductivity); lead compounds; molybdenum compounds; superconducting magnets; type II superconductors; 710 to 90 micron; Chevrel phase wires; PbMo6S8; compressive stress; critical current density; dynamic stabilization; epoxy-impregnated coil; filament diameters; flux jumps; mechanical stability; practical conductor design; screening currents; steady-state magnetic fields; tensile stress; thermal stability; Availability; Coils; Compressive stress; Conductors; Critical current density; Magnetic fields; Stability criteria; Steady-state; Thermal stability; Wires;
Journal_Title :
Magnetics, IEEE Transactions on
