Fabrication and characteristics of a test magnet from HTS Bi-2223 silver-clad tapes

Conference · Thu Jul 01 00:00:00 EDT 1993

OSTI ID:10179050

Haldar, P; Hoehn, Jr, J G ^[1]; Motowidlo, L R ^[2]; Balachandran, U ^[3]; Iwasa, Y ^[4]

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1. Intermagnetics General Corp., Guilderland, NY (United States)
2. IGC/Advanced Superconductors, Inc., Waterbury, CT (United States)
3. Argonne National Lab., IL (United States)
4. Massachusetts Inst. of Technology, Cambridge, MA (United States). Francis Bitter National Magnet Lab.

Critical currents of powder-in-tube processed silver-clad Bi-2223 short tape samples and coils have been measured at liquid nitrogen (77 K), liquid neon (27 K) and liquid helium (4.2 K) temperatures. The short samples have been characterized in fields up to 20 T and indicate a large anisotropy at 27 K with resistive behavior above 15 T in the worst field direction. A test magnet consisting of pancake coils generated magnetic fields greater than 1.0, 0.7 and 0.11 T at 4.2 K, 27 K and 77 K respectively. The ctest magnet generates significant self-fields in background fields up to 14.5 T at 4.2 K and 27 K. Optimization of thermo-mechanical process parameters have yielded J{sub c}`s in the superconducting core > 4.0 {times} 10{sup 4} A/cm{sup 2} at 77 K, zero field and > 2.0 {times} 10{sup 5} A/cm{sup 2} at 4.2 K, zero field for short tape samples. Long lengths (>30 m) of silver-clad tape superconductors have also been fabricated and tested to carry significant amounts of current (J{sub c} core > 10,000 A/cm{sup 2}) at 77 K. Overall J{sub c} of short and long samples and characteristics of the test magnet are reported.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10179050
• Report Number(s): ANL/ET/CP--80302; CONF-930703--19; ON: DE93018624
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601
360606
665412
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
CURRENT DENSITY
FABRICATION
HIGH-TC SUPERCONDUCTORS
LEAD OXIDES
MAGNETIC FIELDS
MATERIALS TESTING
PERFORMANCE TESTING
PHYSICAL PROPERTIES
PREPARATION AND MANUFACTURE
SILVER
STRONTIUM OXIDES
SUPERCONDUCTING COILS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS