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US 5,394,130 AGranted
Persistent superconducting switch for conduction-cooled superconducting magnet
AssigneeGeneral Electric Company
InventorsBu-Xin Xu, Raghavan Jayakumar, John J. Wollan
Life of this patent
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Abstract
A stable superconducting switch suitable for use in a conduction-cooled superconducting magnet includes a tape wound in a coil with the tape including an Nb.sub.3 Sn conductor sandwiched between stabilizing layers of copper, bronze or brass and wound in layers, with groups of layers separated by a partial layer of electrically conductive material.
Claims16
A superconducting switch stabilized against flux-jumping in a conduction-cooled superconducting magnet assembly including main magnet coils, said superconducting switch comprising;
- a coil form;
- a superconducting tape wound in layers on said coil form;
- said coil form positioned adjacent to said main magnet coils of said superconducting magnet assembly;
- said superconducting tape including Nb.sub.3 Sn conductor with metallic stabilizing layers on opposite sides of said Nb.sub.3 Sn conductor;
- the provision of conduction cooling to said superconducting magnet assembly and said superconducting switch for superconducting operation;
- wherein said metallic layers are selected from the group consisting of bronze or brass and copper
- whereby the selection of bronze or brass is utilized to provide a superconducting switch with a higher resistance and higher inductance than the selection of copper and whereby said superconducting switch resists flux jumping;
- and
- wherein partial layers of an electrically conducting material without electrical closure separate groups of layers of said superconductor tape.
6 more elements
A superconducting magnet assembly including a superconducting switch and superconducting main magnet coils comprising:
- a plurality of said main magnet coils of different axial widths and similar diameters;
- a superconducting switch stabilized against flux-jumping including a coil positioned between the main magnet coil having the greatest axial width and its adjacent main magnet coil and further comprising;
- a coil form;
- a superconducting tape of Nb.sub.3 Sn sandwiched between stabilizing layers wound in layers on said coil form;
- said coil form positioned adjacent to said superconducting magnet;
- said superconducting switch and said superconducting magnet being of substantially the same diameter;
- and
- the provision of conduction cooling to said superconducting magnet assembly for superconducting operation;
- whereby said superconducting switch resists flux-jumping.
6 more elements
A superconducting magnet assembly comprising:
- a plurality of magnet coils of different axial widths and similar diameters;
- a superconducting switch stabilized against flux-jumping including a coil mounted between the widest magnet coil and its adjacent magnet coil and further comprising;
- a coil form;
- a superconducting tape of Nb.sub.3 Sn sandwiched between stabilizing layers wound in layers on said coil form;
- said coil form positioned adjacent to said superconducting magnet;
- said superconducting switch and said superconducting magnet being of substantially the same diameter;
- and
- the provision of conduction cooling to said superconducting magnet assembly for superconducting operation;
- whereby said superconducting switch resists flux-jumping;
- and
- wherein the superconductor tape is wound in a bi-filar winding.
8 more elements
A superconducting magnet assembly comprising:
- a plurality of magnet coils of different axial widths and similar diameters;
- a superconducting switch stabilized against flux-jumping including a coil mounted between the widest magnet, coil and its adjacent magnet coil and further comprising;
- a coil form;
- a superconducting tape of Nb.sub.3 Sn sandwiched between stabilizing layers wound in layers on said coil form:
- said coil form positioned adjacent to said superconducting magnet;
- said superconducting switch and said superconducting magnet being of substantially the same diameter;
- and
- the provision of conduction cooling to said superconducting magnet assembly for superconducting operation:
- whereby said superconducting switch resist flux-jumping;
- and
- wherein said stabilizing layers of said superconducting tape are selected from the group consisting of bronze or brass, approximately 0.075 mm thick;
- and copper approximately 0.025 mm thick.
9 more elements
A superconducting magnet assembly comprising:
- a plurality of magnet coils of different axial widths and similar diameters;
- a superconducting switch stabilized against flux-jumping including a coil mounted between the widest magnet coil and its adjacent magnet coil and further comprising;
- a coil form;
- a superconducting tape of Nb.sub.3 Sn sandwiched between stabilizing layers wound in layers on said coil form;
- said coil form positioned adjacent to said superconducting magnet;
- said superconducting switch and said superconducting magnet being of substantially the same diameter;
- and
- the provision of conduction cooling to said superconducting magnet assembly for superconducting operation;
- whereby said superconducting switch resists flux-jumping;
- and
- wherein said stabilizing layers of said superconducting tape are copper providing a low resistance, small mass superconducting switch with an inductance of less than 50 H.
8 more elements
A superconducting magnet assembly comprising:
- a plurality of magnet coils of different axial widths and similar diameters;
- a superconducting switch Stabilized against flux-jumping including a coil mounted between the widest magnet coil and its adjacent magnet coil and further comprising:
- a coil form;
- a superconducting tape of Nb.sub.3 Sn sandwiched between stabilizing layers wound in layers on said coil form;
- said coil form positioned adjacent to said superconducting magnet;
- said superconducting switch and said superconducting magnet being of substantially the same diameter;
- and
- the provision of conduction cooling to said superconducting magnet assembly for superconducting operation;
- whereby said superconducting switch resists flux-jumping;
- and
- wherein said stabilizing layers of said superconducting tape are selected from the group consisting of bronze and brass to provide a high resistance, small mass, superconducting switch.
8 more elements
Dependencies are inferred from the claim text.