Research and Development of the High Stable Magnetic Field ReBCO Coil System Fundamental Technology for MRI

Engineering current density over 5 kA mm−2 at 4.2 K, 14 T in thick film REBCO tapes

“…Rare earth barium copper oxide (REBCO) coated conductors (CC) have a tremendous potential for numerous applications such as fusion reactor magnets, high energy particle accelerators, generators, motors, superconducting magnetic energy storage, and magnetic resonance imaging over a broad temperature range of 4-77 K in high magnetic fields of 2-30 T, due to their high critical temperature, high irreversibility field and high critical current density [1][2][3][4][5][6][7][8][9][10]. Several research and development projects are ongoing to develop high-field magnets with insert coils of REBCO, due to its high current carrying capability in high background fields [11][12][13][14].…”

Efficient Numerical Modeling of the Magnetization Loss on a Helically Wound Superconducting Tape in a Ramped Magnetic Field

“…The Dirichlet boundary condition g(ξ = ±w 0 /2, ζ) = 0 is imposed on g(ξ, ζ) along the long edges of the SC tape, whereas the periodic boundary condition g(ξ, ζ) = g(ξ, ζ + L tape ) is imposed at the terminals of the SC tape with a full pitch. Herein, the field sweep rate is set to β = 3 mT/s because the typical field sweep rate of an MRI magnet is of the order of milliteslas per second [16], [17].…”

First magnetic resonance imaging under three tesla magnetic field [News From Japan]

“…Furthermore, the SC coil was vacuum impregnated with anti-cryogenic-cracking epoxy resin in order to increase the mechanical toughness. Table 1 shows the specifications of the REBCO wire used for the coil [7].…”

“…An external view and the specification of the assembled SC model coil are shown in Figure 3 and Table 2, respectively [7]. The magnetic field at the center of the bore or area where a patient is scanned is 2.9 T, the same as general 3-T MRI systems.…”