27 August 2017 to 1 September 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Development of small diameter HTS Cross Conductors for Fusion Magnet Application

29 Aug 2017, 13:15
1h 45m
Postera Area

Postera Area

Poster Presentation of 1h45m F4 - ReBCO Wires and Cables Tue-Af-Po2.08

Speaker

Walter H. Fietz (Karlsruhe Institute of Technology, Institute for Technical Physics, Karlsruhe, Germany)

Description

Karlsruhe Institute of Technology (KIT) developed the HTS Cross Conductor (CroCo), a round twisted stacked REBCO strand with outer Cu envelope, optimized for high current density and easy long length fabrication. First generation of HTS CroCos were built from 6 mm and 4 mm wide REBCO tapes with critical currents Ic ~ 3 kA (77 K / s.f.) and Ic > 8 kA (4.2 K, 12 T). Due to the continuously increasing REBCO tape performance, Ic of HTS CroCo is now > 10 kA at 4.2 K / 12 T. This HTS CroCo diameter will be used for a high current power transmission cable demonstrator with LN2 cooling in the 35 kA range. For the planned use in large fusion magnets, smaller HTS CroCos would be preferable, because improved bending properties are beneficial. Therefore, the HTS CroCo fabrication technique was extended to smaller HTS CroCos.
HTS CroCos were fabricated from 3 mm and 2 mm wide REBCO tapes. Straight samples were measured at 4.2 K / 12 T in the FBI facility and bending experiments at 77 K, s.f. were performed with similar samples, too. First results from measurements of straight and bended HTS CroCos will be presented and compared with expectations.

Submitters Country Germany

Primary author

Walter H. Fietz (Karlsruhe Institute of Technology, Institute for Technical Physics, Karlsruhe, Germany)

Co-authors

Nadja Bagrets (Karlsruhe Institute of Technology, Institute for Technical Physics, Karlsruhe, Germany) Reinhard Heller (Karlsruhe Institute of Technology, Institute for Technical Physics, Karlsruhe, Germany) Christian Lange (Karlsruhe Institute of Technology, Institute for Technical Physics, Karlsruhe, Germany) Alan Preuss (Karlsruhe Institute of Technology, Institute for Technical Physics, Karlsruhe, Germany) Klaus-Peter Weiss (Karlsruhe Institute of Technology, Institute for Technical Physics, Karlsruhe, Germany) Michael J. Wolf (Karlsruhe Institute of Technology, Institute for Technical Physics, Karlsruhe, Germany)

Presentation Materials