Unspliced superconducting coil device with high stability

A tightly wound superconducting coil device comprising:

• a cooling medium vessel;
• a coil winding disposed in the cooling medium vessel, the coil winding including a superconducting wire and having a configuration such that a cooling medium disposed in the cooling medium vessel does not contact the superconducting wire;
• and
• an insulating member disposed between the coil winding and the cooling medium vessel;
• wherein a portion of the superconducting wire forming outer portions of the coil winding on two opposite sides of the coil winding includes a copper stabilizer and is covered with aluminum, thereby causing a stability margin of the outer portions of the coil winding to be greater than a stability margin of a remaining portion of the coil winding;
• and
• wherein the superconducting wire is an unspliced superconducting wire.

A tightly wound superconducting coil device comprising:

• a cooling medium vessel;
• a coil winding disposed in the cooling medium vessel, the coil winding including an unspliced superconducting wire and having a configuration such that a cooling medium disposed in the cooling medium vessel does not contact the unspliced superconducting wire;
• and
• an insulating member disposed between the coil winding and the cooling medium vessel;
• wherein a portion of the unspliced superconducting wire forming outer portions of the coil winding on all sides of the coil winding has a composition which causes a stability margin of the outer portions of the coil winding to be greater than a stability margin of a remaining portion of the coil winding.

A tightly wound superconducting coil device comprising:

• a cooling medium vessel;
• a coil winding disposed in the cooling medium vessel, the coil winding including a superconducting wire and having a configuration such that a cooling medium disposed in the cooling medium vessel does not contact the superconducting wire;
• and
• an insulating member disposed between the coil winding and the cooling medium vessel;
• wherein a portion of the superconducting wire forming outer portions of the coil winding on all sides of the coil winding includes a copper stabilizer and is covered with aluminum, thereby causing a stability margin of the outer portions of the coil winding to be greater than a stability margin of a remaining portion of the coil winding;
• and
• wherein the superconducting wire is an unspliced superconducting wire.