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Title: Stability and normal zone propagation in YBCO CORC cables

In this study, a two layer conductor on round core cable was tested for stability and normal zone propagation at 77 K in a liquid nitrogen bath. The cable was instrumented with voltage taps and wires on each strand over the cable’s central portion (i.e. excluding the end connections of the cable with the outside world). A heater was placed in the central zone on the surface of the cable, which allowed pulses of various powers and durations to be generated. Shrinking (recovering) and expanding (not recovering) normal zones have been detected, as well as stationary zones which were in thermal equilibrium. Such stationary thermal equilibrium zones did not expand or contract, and hit a constant upper temperature while the heater current persisted; they are essentially a form of Stekly stability. Overall, the cable showed a high degree of stability. Notably, it was able to carry a current of 0.45I c cable with maximum temperature of 123 K for one minute without damage.
 [1] ;  [1] ;  [1] ;  [2]
  1. The Ohio State Univ., Columbus, OH (United States)
  2. Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Grant/Contract Number:
SC0011721; SC0007891; SC0014009
Accepted Manuscript
Journal Name:
Superconductor Science and Technology
Additional Journal Information:
Journal Volume: 29; Journal Issue: 4; Journal ID: ISSN 0953-2048
IOP Publishing
Research Org:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
36 MATERIALS SCIENCE; YBCO; cables; stability; quench; normal zone; CORC; coated conductor
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1241434