Superconducting wire with low AC losses

Process for manufacturing a multilayer superconducting wire comprising the steps of:

• 1) forming a planar tape into a tube-shaped tape;
• 2) twisting the obtained tube-shaped tape of step 1;
• 3) providing a superconductor layer onto the outer surface of the tube-shaped tape;
• and
• 4) structuring the superconductor layer into lanes running spirally along the lengths of the superconductor wire, wherein subsequent to step 1 and prior to step 2 or subsequent to step 2 and prior to step 3 one or more buffer layer(s) are provided or wherein both subsequent to step 1 and prior to step 2 and subsequent to step 2 and prior to step 3 one or more buffer layer(s) are provided.

Process for preparing a multilayer superconducting wire comprising the steps of:

• coating a planar tape with at least one buffer layer;
• structuring at least the uppermost buffer layer into parallel lanes;
• forming the planar tape into a tubular tape with the surface with the buffer layer(s) being directed outward;
• twisting the resulting tubular tape;
• optionally providing one or more further buffer layer(s);
• and
• coating with superconductor, wherein said multilayer superconducting wire is provided with an essentially round cross sectional area.

Process for preparing a multilayer superconducting wire comprising the steps of:

• 1) coating a planar tape with at least one buffer layer;
• 2) coating with superconductor layer;
• 3) forming the resulting coated planar tape into a tubular tape with the coatings being directed outward;
• 4) twisting the resulting tubular tape, wherein either subsequent to step 2 or subsequent to step 4 at least the superconductor layer is structured into lanes wherein said multilayer superconducting wire is provided with an essentially round cross sectional area.

Process for preparing a multilayer superconducting wire comprising the steps of:

• optionally coating a planar tape with at least one buffer layer;
• forming the planar tape into a tubular tape;
• coating with one or more buffer layer(s);
• coating with superconductor layer;
• and
• structure at least the superconductor layer into twisted lanes wherein said multilayer superconducting wire is provided with an essentially round cross sectional area.