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Dr. Michael Wolf
Dr. Michael Wolf

Tel: +49 (0)721 6082 4118

Email: michael wolfWlt3∂kit edu

HTS High Current conductor concepts

REBCO Vorschläge für HTS-Hochstromleiter

The viewgraph shows several HTS high current conductors made from the HTS material REBCO.

In particular, in the Round strand (d) by Swiss Plasma Center (SPC), a stack of REBCO tapes is encapsulated by copper half-shells to form a round conductor from flat REBCO tapes.
Based on this concept, the HTS CroCo (g) was developed. It optimizes the current density by using a cross-shaped REBCO tape arrangement and the mechanical stability by encapsulating the superconductor in a seamless copper tube. Additionally, an easy-to-use fabrication routine for the HTS CroCo core was implemented that can easily be extended to application-relevant conductor lengths.


W.H. Fietz et al., High-Current HTS Cables: Status and Actual Development", IEEE TRANS. APPL. SUPERCOND.  26(4) (2016)  4800705


(a) Twisted Stacked-Tape Conductor (TSTC)
M. Takayasu, L. Chiesa, L. Bromberg and J. V.Minervini, "Cabling method for high current conductors made of HTS tapes", IEEE Trans. Appl. Supercond. vol. 21, no. 3, pp. 2340–2344, June 2011
(b) Roebel Cable
W. Goldacker, F. Grilli, E. Pardo, A. Kario, S. I. Schlachter and M. Vojenčiak, "Roebel cables from REBCO coated conductors: a one-century-old concept for the superconductivity of the future", Supercond. Sci. Technol. 27, Aug. 2014, Art. ID. 093001
(c) HTS Conductor on Round Core (CORC)
D. C. van der Laan, P. D. Noyes, G. E. Miller, H. W. Weijers and G. P. Willering, "Characterization of a high-temperature superconducting conductor on round core cables in magnetic fields up to 20 T", Supercond. Sci. Technol. 26,  Feb. 2013, Art. ID. 045005
(d) Round Twisted Stacked Conductor
D. Uglietti, R. Wesche, and P. Bruzzone, "Design and Strand Tests of a Fusion Cable Composed of Coated Conductor Tapes", IEEE Trans. Appl. Supercond. vol. 24, no.3, June 2014, Art. ID. 4800704
(e) HTS Cable-in-Conduit Conductor
G. Celentano et al., "Design of an Industrially Feasible Twisted-Stack HTS Cable-in-Conduit Conductor for Fusion Application", IEEE Trans. Appl. Supercond. vol. 24, no.3, June 2014, Art. ID. 4601805
(f) Stacked Tapes Assembled in Rigid Structure Conductor
Y. Terazaki et al., "Measurement and Analysis of Critical Current of 100-kA Class Simply-Stacked HTS Conductors", IEEE Trans. Appl. Supercond., vol. 25, no. 3, June 2015, Art. ID. 4602905
(g) HTS-CrossConductor (HTS-CroCo) M. J. Wolf, W. H. Fietz, C. M. Bayer, S. I. Schlachter, R. Heller, and K.-P. Weiss, “HTS CroCo - A stacked HTS conductor optimized for high currents and long length production,”.
(h) Some examples of complex cable arrangements that can be realized with the proposals (a), (b), (c), (d) or (g)