Advances in large scale applications of superconductors

Abstract

Most applications are still relying on LTS use as the magnet systems for large accelerators and for magnetic fusion devices. NMR spectrometers are approaching the 1000 MHz class (23.5 T in the magnet bore), a challenge to most advanced LTSs as well as to HTSs. In MRI trends for HTS use have successfully been demonstrated, as well as for cryogen-free magnets, SMES and magnetic separation. However economy will depend on HTS wire cost reductions. Already well in use are HTS current leads, contributing to advantages for magnets in many areas.

Superconducting Materials — A Topical Overview

“…Another well-investigated experimental T c trend is the slight increase of the optimized T c of the RE-123 HTS with increasing distance between the two CuO 2 layers in the active block 23 . It has been explained in terms of a higher effective charge transfer to the CuO 2 layers [68,70].…”

“…Today, NbTi and Nb 3 Sn conductors are the basis of a billion Euro SC wire industry which delivers magnets that cannot be realized by means of conventional metal wire conductors, e. g., for Magnetic Resonance Imaging (MRI) systems and High-Energy Physics (HEP) particle accelerators 7 [1,22,23]. The enormously high critical fields H c2~ 100 T of HTS [24] indicate their potential for extremely high-field applications.…”

“…Based on these experimental results, a reasonable theoretical description of T c (n) has recently been modeled in a phenomenological Ginzburg-Landau free energy approach [120]. 23 On hydrostatic pressure application, dT c /dP shows the same trend which further increases the T c differences of the RE-123 [68]. On uniaxial pressure application, T c increases if the pressure effect is to reverse the tetragonal-to orthorhombic lattice distortion [122].…”

Advanced electromagnetic modeling of large-scale high-temperature superconductor systems based on H and T-A formulations

“…In a T-A densified model the densified tapes are onedimensional objects along which the J distributions are computed by means of the current density potential T, and its only non-zero component T y , as given in equation (5). The resistivity of the HTS material is defined by means of equations ( 10) and (11). Unlike the H densified strategy, here the critical current density is not modified.…”

Electric Field Behavior with Current for Bipbsrcacuznxo Thin Film System

“…Research is being carried out to develop superconductors for high temperatures [2], via: Energy and electricity field such as power transmission wire, SMES, transformer industry and transportations field such as maglev, motor, magnet used for growth of superconductor [3]. Diagnosis and medical field such as accelerator, magnetic resonance imaging (MRI) [3] [4].…”