Low-aspect ratio superconductor wire

A single oxide superconductor filament wire arranged in an elongated wire structure, said wire structure having a low-aspect ratio in a plane transverse to a longitudinal axis of said wire structure, the low-aspect ratio being preserved along a working length of said wire,

• said filament following a longitudinal axis substantially parallel to said wire axis and having a low-aspect ratio in a plane transverse to said longitudinal axis of said filament, the low-aspect ratio of said filament being preserved along the working length of said wire, and
• said filament being textured such that a crystallographic c direction of said filament is perpendicular to the longitudinal axis of said wire structure.

A multi-filament supercondutor wire having a plurality of oxide superconductor filaments arranged in an elongated wire structure having a generally rectangular cross section, said wire structure having a low aspect ratio in a plane transverse to a longitudinal axis of said wire, the low-aspect ratio being preserved along a working length of said wire,

• each said filament following a longitudinal axis substantially parallel to said wire axis and having a low-aspect ratio in a plane transverse to said longitudinal axis of each said filament, the low-aspect ratio of each said filament being preserved along the working length of said wire, and
• said wire having Jc anisotropy with respect to two orthogonal magnetic field orientations perpendicular to the longitudinal axis of said wire structure in a 0.2 Tesla field DC at 77 Kelvin of at least 2:1.

A multi-filament superconductor wire having a plurality of oxide superconductor filaments arranged in an elongated wire structure having a generally rectangular cross section, said wire structure having a low aspect ratio in a plane transverse to a longitudinal axis of said wire,

• each said filament having a low-aspect ratio in a plane transverse to a longitudinal axis of each said filament, each filament longitudinal axis being substantially parallel to said wire axis,
• said wire being capable of carrying a current density of at least 1000 A/cm2 at 77 Kelvin.

An amalgamated superconducting wire formed by planetary winding of a plurality of multi-filament superconductor wires,

• each said multi-filament superconductor wire having in the range of about 2 to 100 oxide superconductor filaments arranged in an elongated wire structure having a generally rectangular cross section, each said wire structure having a low-aspect ratio in a plane transverse to a longitudinal axis of said wire structure, the low-aspect ratio being preserved along a working length of said wire, each said filament following a longitudinal axis substantially parallel to said wire axis and having a low-aspect ratio in a plane transverse to said longitudinal axis of each said filament, the low-aspect ratio of each said filament being preserved along the working length of said wire, each said multi-filament superconductor wire further including a high resistance wire surface coating of 10−2 to 10−5 Ω-cm.

An amalgamated superconducting wire formed by planetary winding of a plurality of single oxide superconductor filament wires,

• each said single filament wire being arranged in an elongated wire structure having a generally rectangular cross section, each said wire structure having a low-aspect ratio in a plane transverse to a longitudinal axis of said wire structure, the low-aspect ratio being preserved along a working length of said wire, said filament in each said single filament wire following a longitudinal axis substantially parallel to said wire axis, each said single filament wire further including a high resistance wire surface coating with an average resistivity of 10−2 to 10−5 Ω-cm.

A superconducting cable comprising a plurality of multi-filament supercondutor wires wound in a planetary winding,

• each multi-filament superconductor wire having in the range of about 2 to 106 filaments arranged in an elongated wire structure having a generally rectangular cross section and a low-aspect ratio in a plane transverse to a longitudinal axis of said wire structure, the low-aspect ratio being preserved along a working length of said wire, each said filament following a longitudinal axis substantially parallel to said wire axis and having a low-aspect ratio in a plane transverse to said longitudinal axis of each said filament, the low-aspect ratio of each said filament being preserved along the working length of said wire.

A multi-filament superconductor wire having a plurality of oxide superconductor filaments arranged in an elongated wire structure, said wire structure having a low-aspect ratio in a plane transverse to a longitudinal axis of said wire structure, the transverse plane defining a width dimension and a height dimension, the low-aspect ratio being preserved along a working length of said wire,

• each said filament following a longitudinal axis substantially parallel to said wire axis and having a low-aspect ratio in a plane transverse to said longitudinal axis of each said filament, the low-aspect ratio of each said filament being preserved along the working length of said wire, and
• said filaments being textured such that a crystallographic c direction of each filament is aligned with a crystallographic c direction of all other filaments, the crystallographic c directions being perpendicular to the longitudinal axis of said wire structure and substantially aligned along the height dimension.