Fabrication and evalution of a cryostable Nb/sub 3/Sn superconductor for the Mirror Fusion Test Facility (MFTF-B)
The MFTF-B magnet system requires two 12.5T, 36 cm bore, insert coils. These coils are being constructed with a cryostable Nb/sub 3/Sn conductor manufactured by Furukawa Electric Co. The conductor consists of a core soldered into a cold-worked copper housing, which provides strength. The Nb/sub 3/Sn core is made by a triple extrusion bronze process. A total of 57 lengths, each 295 m long, have been made and tested. We have made extensive tests on this conductor; these tests include critical current, ambient and 4.2 K mechanical property measurements, critical current as a function of tensile strain, and bending tolerance tests. The critical current density was found to be quite anisotropic in this conductor, with J/sub c/(12T) = 650A/mm/sup 2/ for field perpendicular to the conductor wide face, and J/sub c/(12T) = 500A/mm/sup 2/ for field parallel to the conductor wide face. These values of current density are among the highest reported for a production lot of Nb/sub 3/Sn conductor.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA); General Dynamics Corp., San Diego, CA (USA). Convair Div.; Furukawa Electric Co. Ltd., Tokyo (Japan)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6211934
- Report Number(s):
- UCRL-90582; CONF-840937-14; ON: DE85000849
- Resource Relation:
- Conference: Applied superconductivity conference, San Diego, CA, USA, 9 Sep 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MFTF DEVICES
SUPERCONDUCTING MAGNETS
FABRICATION
CRITICAL CURRENT
MAGNET COILS
NIOBIUM ALLOYS
PERFORMANCE
STRAINS
TIN ALLOYS
ALLOYS
CURRENTS
ELECTRIC COILS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNETIC MIRRORS
MAGNETS
OPEN PLASMA DEVICES
SUPERCONDUCTING DEVICES
THERMONUCLEAR DEVICES
700202* - Fusion Power Plant Technology- Magnet Coils & Fields
420201 - Engineering- Cryogenic Equipment & Devices