28 June 2015 to 2 July 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Current sharing, quench, and normal zone propagation in YBCO CORC and Roebel cables

30 Jun 2015, 14:00
2h
Exhibit Hall (Arizona Ballroom) ()

Exhibit Hall (Arizona Ballroom)

Poster Presentation ICMC-09 - HTS Cables M2PoC - Superconductor Cables II: HTS

Speaker

Milan Majoros (The Ohio State University)

Description

A two layer CORC (Cable on Round Conductor) cable, 156 cm long, was tested for stability and normal zone propagation at 77 K in liquid nitrogen bath. The cable was instrumented with potential taps and wires on each strand covering its central portion (i.e. excluding the end connections of the cable with the outside world). A heater was placed on top of the cable which allowed pulses of various powers and durations to be generated. DC transport currents of some percentage of the cable critical current were applied. During and after the heat pulse NZP was measured by a high speed data acquisition card (DAQ) controlled via LabView software. Shrinking as well as expanding normal zones have been detected. The cable showed a high degree of stability. It was able to carry a current of 0.58Ic with maximum temperature of 250 K for nearly 6 minutes and 0.635Ic with maximum temperature of 300 K for 1 minute without damage. The cable had relatively low current sharing, even with uninsulated strands. These results were compared to a Roebel cable measured for quench at 4.2 K in liquid helium and 10 T. It was mounted on a u-shaped holder and instrumented with voltage taps and a heater. This cable had intentional solder connections between the strands.

Primary author

Milan Majoros (The Ohio State University)

Co-authors

Danko van der Laan (Advanced Conductor Technologies) Prof. Edward Collings (The Ohio State University) Prof. Michael Sumption (The Ohio State University)

Presentation Materials

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