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CICC manufacturing technology as a factor affecting Tcs stability during full-size testing

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posted on 12.05.2020 by Denis Kaverin

The test results of the ITER toroidal field conductors demonstrated a decrease of the current sharing temperature (Tcs) with an increase in the number of electromagnetic cycles in general. This is associating with several factors. One of them is the superconducting Nb3Sn filaments cracking and another one is the redistribution of the relative deformation of the Nb3Sn strands under Lorentz forces. Despite these factors, some conductors have shown the absence or significantly less degradation of Tcs during electromagnetic cycling. This article considers another possible reason for a more stable conductors Tcs behavior, namely, the local compression of Nb3Sn wires in the cross section of a conductor. In this article presents the results of a quantitative analysis Nb3Sn superconducting filaments cracking of strands extracted from a conductor that has passed electromagnetic cycling and the model of a conductor compaction, as well as calculation results based on this model are presented also.

Funding

Russian Science Foundation (project №19-79-00193)

History

Email Address of Submitting Author

kaverinds@gmail.com

ORCID of Submitting Author

0000-0003-4014-7202

Submitting Author's Institution

All-Russian Scientific R&D Cable Institute (JSC “VNIIKP”)

Submitting Author's Country

Russian Federation

Licence

Exports

Licence

Exports