Characterization of multifilamentary Nb{sub 3}Sn superconducting wires for use in the 45-T hybrid magnet

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:426005

Summers, L T ^[1]; Goldfarb, R B ^[2]; Gregory, E ^[3]

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1. National High Magnetic Field Laboratory, Tallahassee, FL (United States)
2. National Institute for Standards and Technology, Boulder, CO (United States)
3. Intermagnetics General Corporation, Waterbury, CT (United States); and others

The National High Magnetic Field Laboratory (NHMFL), in collaboration with the Francis Bitter National Magnet Laboratory, is constructing a 45-T hybrid magnet system. Here the authors report the results of studies to characterize candidate Nb{sub 3}Sn superconductors for use in the superconducting outsert coils. They have determined the effects of strain and magnetic field on critical current, measured a.c. losses, and measured residual resistivity ratios (RRR) as a function of heat treatment. Critical currents in excess of 1000 A/mm{sup 2} non-Cu have been measured in sample wires at 12 T and 4.2K combined with a hysteresis loss of less than 500mJ/cm{sup 3}. RRR has been found to be highly dependent of heat treatment and can exceed 400 in combination with high J{sub c}. The authors will also present predicted 1.8 K performance, based on empirical models, for the wires investigated.

• OSTI ID: 426005
• Report Number(s): CONF-9505186--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
AC LOSSES
CRITICAL CURRENT
ELECTRIC CONDUCTIVITY
HEAT TREATMENTS
MAGNETIC FIELDS
NIOBIUM BASE ALLOYS
SUPERCONDUCTING WIRES
TITANIUM ALLOYS