Superconducting coil and manufacturing method for superconducting coil
AssigneeCanon Medical Systems Corporation
InventorsKota Nomura, Shoichi Yokoyama, Tetsuya Matsuda
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Abstract
In a superconducting coil used in an MRI apparatus, it is necessary to arrange a superconducting wire at a desired position to obtain a desired coil shape in order to obtain a temporally stable static electromagnetic field with high strength and high uniformity. A superconducting coil includes a winding frame, a spacer disposed on an outer periphery of winding frame and including a winding groove having a spiral shape and a communication groove provided between winding grooves, and includes a coil group having a superconducting wire wound in winding groove. It is therefore possible to obtain superconducting coil having a desired coil shape.
Claims10
A superconducting coil comprising:
- a winding frame;
- a first spacer disposed on an outer periphery of the winding frame and including
- a first winding groove having a spiral shape and disposed in a peripheral direction of the winding frame,
- a second winding groove having a spiral shape and disposed apart from the first winding groove, and
- a first communication groove provided between the first winding groove and the second winding groove;
- a second spacer disposed on an upper layer of the first spacer and including
- a third winding groove having a spiral shape and disposed above the first winding groove,
- a fourth winding groove having a spiral shape and disposed apart from the third winding groove and above the second winding groove, and
- a second communication groove provided between the third winding groove and the fourth winding groove;
- a first coil group including
- a first layer of a superconducting wire having the superconducting wire wound in the first winding groove, and
- a second layer of the superconducting wire having the superconducting wire wound in the third winding groove;
- and
- a second coil group communicated with the first coil group by the superconducting wire on the first communication groove and the second communication groove and including
- a first layer of the superconducting wire having the superconducting wire wound in the second winding groove, and
- a second layer of the superconducting wire having the superconducting wire wound in the fourth winding groove.
A manufacturing method for a superconducting coil comprising:
- a first spacer arrangement step of arranging, on an outer periphery of a winding frame, a first spacer including
- a first winding groove having a spiral shape and disposed on the outer periphery of the winding frame,
- a second winding groove having a spiral shape and disposed apart from the first winding groove, and
- a first communication groove to communicate the first winding groove with the second winding groove;
- a first layer formation step of forming a first layer of a first coil group by winding a superconducting wire in the first winding groove and
- forming a first layer of a second coil group by winding the superconducting wire in the first communication groove and the second winding groove;
- a second spacer arrangement step of arranging, on the first spacer, a second spacer including a third winding groove disposed on the first spacer and having a spiral shape, a fourth winding groove disposed apart from the third winding groove and having a spiral shape, and a second communication groove communicating the third winding groove with the fourth winding groove such that the third winding groove is disposed above the first winding groove, and the fourth winding groove is disposed above the second winding groove;
- and
- a second layer formation step of forming a second layer of the second coil group by winding the superconducting wire in the fourth winding groove and
- forming a second layer of the first coil group by winding the superconducting wire in the second communication groove and the third winding groove.
Dependencies are inferred from the claim text.