Progress in fabrication of second generation high temperature superconducting tape at Shanghai Superconductor Technology

Abstract

The development and application of second generation high temperature superconducting (2G-HTS) tapes have attracted much attention in China recently. Progress in upscaling high performance 2G-HTS tape production at Shanghai Superconductor Technology (SST) is reported in this paper. With ion beam assisted deposition, biaxially textured buffer layers with a configuration of CeO 2 /LaMnO 3 /MgO/Y 2 O 3 /Al 2 O 3 /C-276 have successfully been fabricated. In-plane and out-ofplane texture degrees of CeO 2 films achieve 2°-4°and 2°, respectively. A multi-plume multi-turn pulsed laser deposition (PLD) system combined with the so-called 'radiation assisted conductive heater' has been proposed and further developed for REBCO layer deposition. Our effort was focused on minimizing the temperature variations in the deposition region by modifying the heating shield that assists the conductive heater of the drum-like cylinder. A tape travelling speed of 100-180 m h −1 can be achieved with a steady temperature profile when passing through the deposition zone, which is very beneficial for the growth of the REBCO layer. Taking advantage of the liquid phase growth mode, several compositions of superconducting films with a thickness in the range of 1-2.5 μm have been grown with high growth rates of over 40 nm s −1 . Furthermore, the microstructures and superconducting performance were investigated in detail. Based on these studies, superconducting tapes with piece lengths of up to 500 meters have been developed. High I c values at 77 K, self-field (over 520 A cm −1 width) or at low temperature, high magnetic field conditions (over 560 A/4 mm width at 4.2 K, 10 T, perpendicular field) have been achieved. Lamination and jointing techniques have also been developed by SST for power and magnet applications.

AMS-100: The next generation magnetic spectrometer in space – An international science platform for physics and astrophysics at Lagrange point 2

“…A typically 20 µm thick copper stabilizer completes the HTS tapes (for more details, see for example Refs. [22][23][24]) which can be easily soldered for joints. It has been shown in Ref.…”

Progress on Second-Generation High-Temperature Superconductor Tape Targeting Resistive Fault Current Limiter Application

“…There are two types of superconducting current limiters: saturated iron core current limiter and resistive current limiter. As the second-generation HTS tapes enter the commercialization stage, more and more enterprises can mass-produce the second-generation HTS tapes [6][7][8][9][10][11][12][13]. Compared with the first-generation tapes, 70% of which were made from silver, the second-generation tapes have higher structural strength, greater room-temperature resistance, and higher quench recovery speed, which has attracted research interest to be applied for resistive current limiters [14].…”

Electromagnetic modelling using T‐A formulation for high‐temperature superconductor (RE)Ba 2 Cu 3 O x high field magnets

“…Current superconducting magnets are based on low‐temperature superconductors (LTS) like NbTi and Nb3Sn, and their fields are limited to 23.5 T, which is the critical fields of Nb3Sn. The second generation (2G) high‐temperature superconductor (HTS), (RE)Ba 2 Cu 3 O x (REBCO), shows significant advantages on high critical fields and high current density, which has been improved in recent two decades [5, 6]. It has a great potential to generate extra high magnetic fields up to 100 T at low temperature far exceeding the possible field range of LTS can reach [7].…”