A High Performance Insulated REBCO Pancake With Conductive Cooling Capability

Julien Vialle, Arnaud Joel Badel, Kohki Takahashi, Satoshi Awaji, Pascal Tixador

Research output: Contribution to journalArticlepeer-review


REBCO Coated Conductors have high tensile strength along their length. They are however sensitive to delamination when traction force is applied on the tape surface, which in a pancake winding corresponds to radial tensile stress. For this reason, most REBCO magnets are dry-wound (not impregnated). One of the drawbacks of dry winding is that conduction cooling to low temperature (below 20 K) would be inefficient. Edge impregnation structures were developed to mitigate this problem but retaining a soft non-stick insulating layer in between the turn. In this paper, we propose an improved pancake structure with the benefits of edge-impregnation but using Hastelloy tape with thin insulation coating to reinforce the winding. The mechanical behavior of such structure is first estimated then validated with high current tests under large background magnetic field. The insulation performance is then tested by rapid ramping and fast discharge.

Original languageEnglish
Article number4600405
JournalIEEE Transactions on Applied Superconductivity
Issue number5
Publication statusPublished - 2023 Aug 1


  • co-winding
  • conduction cool capability
  • high magnetic field
  • impregnation
  • insulated REBCO magnet
  • Superconducting magnet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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