Design of a high-current downlink using Bi-based superconductors

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Recent processing developments in Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 2}Cu{sub 3}0{sub x} (BSCCO-2223) bars have produced bulk BSCCO-2223 bars with properties advantageous for power applications. Cold isostatically pressed (CIP) and sinter-forged BSCCO-2223 both have low AC loss, which make them desirable for use in power devices. Thermal conductivity of the CIP bars is lower than that of the previously used sinter-forged samples by a factor of 2. CIP bars with cross-sectional areas of =0.75 cm{sup 2} and carrying 250 A RMS transport current have AC loss values of 30 pJ/cycle-cm at 50 Hz and 77 K. A pair of prototype downlinks ... continued below

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5 p.

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Fisher, B. L.; Lanagan, M. T.; Balachandran, U.; Honjo, S. & Hara, T. August 1996.

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Recent processing developments in Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 2}Cu{sub 3}0{sub x} (BSCCO-2223) bars have produced bulk BSCCO-2223 bars with properties advantageous for power applications. Cold isostatically pressed (CIP) and sinter-forged BSCCO-2223 both have low AC loss, which make them desirable for use in power devices. Thermal conductivity of the CIP bars is lower than that of the previously used sinter-forged samples by a factor of 2. CIP bars with cross-sectional areas of =0.75 cm{sup 2} and carrying 250 A RMS transport current have AC loss values of 30 pJ/cycle-cm at 50 Hz and 77 K. A pair of prototype downlinks were designed and built with sinter forged bars to deliver a continuous AC current of 1500 A over a temperature gradient of 77 to 4.2 K while delivering about -200 MW of heat to the liquid-helium-cooled end. This paper will discuss the design considerations and modeling of downlinks, which supply high AC currents over the 77 to 4.2 K temperature gradient with low thermal losses.

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5 p.

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INIS; OSTI as DE96014863

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  • Applied superconductivity conference, Pittsburgh, PA (United States), 25-30 Aug 1996

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  • Other: DE96014863
  • Report No.: ANL/ET/CP--88998
  • Report No.: CONF-960850--8
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 383006
  • Archival Resource Key: ark:/67531/metadc687760

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1996

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  • July 25, 2015, 2:20 a.m.

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  • Dec. 7, 2015, 4:41 p.m.

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Fisher, B. L.; Lanagan, M. T.; Balachandran, U.; Honjo, S. & Hara, T. Design of a high-current downlink using Bi-based superconductors, article, August 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc687760/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.