Bulk magnet structure and bulk magnet system for NMR

Patent metadata

Field	Value
Publication number	US-10712411-B2
Application number	US-201716320703-A
Country	US
Kind code	B2
Filing date	Jul 27, 2017
Priority date	Jul 27, 2016
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

The purpose of the present invention is to make it possible to use a wider uniform magnetic field space and to achieve an additional use mode for a bulk magnet structure. A bulk magnet structure according to the present invention is provided with a plurality of oxide superconducting bulk bodies arranged so that the central axes thereof are on the same line and at least one outer circumferential reinforcing ring fitted to the bulk magnet structure so as to cover the outer circumferential surfaces of the plurality of oxide superconducting bulk bodies. The plurality of oxide superconducting bulk bodies includes a columnar oxide superconducting bulk body and/or a ring-shaped oxide superconducting bulk body. At least one set of adjacent oxide superconducting bulk bodies are spaced apart from each other in the direction of the central axes thereof. The interior of the bulk magnet structure includes a space through which the central axes pass.

First claim

The invention claimed is:

1. A bulk magnet structure comprising
a plurality of oxide superconducting bulk bodies arranged such that their central axes are on the same line, and
at least one outer circumferential reinforcing ring fitted to cover the outer circumferential surfaces of the plurality of oxide superconducting bulk bodies,
wherein the plurality of oxide superconducting bulk bodies comprise at least a columnar oxide superconducting bulk body or a ring-shaped oxide superconducting body,
wherein at least one pair of adjacent oxide superconducting bulk bodies are spaced apart from each other in the central axis direction and the bulk magnet structure has a space inside thereof through which the central axis passes, and
wherein the space penetrates from a portion of a lateral circumferential portion of the bulk magnet structure to another portion of the lateral circumferential portion, in a direction perpendicular to the central axis.

2. A bulk magnet structure comprising
a plurality of oxide superconducting bulk bodies, and
at least one outer circumferential reinforcing ring fitted to cover the outer circumferential surfaces of the plurality of layered oxide superconductive bulk bodies,
a spacer layered together with the oxide superconducting bulk bodies,
wherein the plurality of oxide superconducting bulk bodies comprise at least a columnar oxide superconducting bulk body or a ring-shaped oxide superconducting bulk body,
wherein the spacer has a space formed so as to penetrate from a portion of the lateral circumferential portion to another portion of the lateral circumferential portion, and the spacer is layered so that at least the central axis of the bulk magnet structure passes through the space, and
wherein the space penetrates from a portion of the lateral circumferential portion of the bulk magnet structure to another portion of the lateral circumferential portion, in a direction perpendicular to the layering direction of the layered oxide superconducting bulk bodies.

3. A bulk magnet structure comprising
a plurality of oxide superconducting bulk bodies,
at least one outer circumferential reinforcing ring fitted to cover the outer circumferential surfaces of the plurality of layered oxide superconducting bulk bodies, and
a space,
wherein the plurality of oxide superconducting bulk bodies comprise a ring-shaped oxide superconducting bulk body, and
wherein the space is capable of forming a magnetic field space by the bulk magnet structure, placing a sample and/or device and communicating with the outside of the bulk magnet structure, in two directions of a direction perpendicular to the layering direction and the layering direction.

4. The bulk magnet structure according to claim 1 , wherein the plurality of oxide superconducting bulk bodies comprise a ring-shaped oxide superconducting body, and the space is capable of communicating with the outside of the bulk magnet structure, in a direction perpendicular to the central axis.

5. The bulk magnet structure according to claim 1 , wherein the space may be disposed in a central portion in the layering direction of the bulk magnet structure.

6. The bulk magnet structure according to claim 2 , wherein the spacer is formed by a non-superconducting bulk body, and the non-superconducting bulk body has a thermal conductivity of 20 W/(m K) or more.

7. The bulk magnet structure according to claim 1 , wherein at least one of the oxide superconducting bulk bodies adjacent to the space in the layering direction of the bulk magnet structure is the ring-shaped oxide superconducting bulk body.

8. The bulk magnet structure according to claim 1 , wherein at least one of the columnar oxide superconducting bulk bodies is a stack in which a columnar oxide superconducting bulk body and a planar reinforcing plate are alternately arranged.

9. The bulk magnet structure according to claim 1 , wherein at least one of the ring-shaped oxide superconducting bulk bodies is a stack in which a ring-shaped oxide superconducting bulk body and a planar ring are alternately arranged.

10. The bulk magnet structure according to claim 9 , wherein the ring-shaped oxide superconducting bulk body has an inner circumferential reinforcing ring inside the body.

11. The bulk magnet structure according to claim 10 , wherein a second inner circumferential reinforcing ring is provided between the ring-shaped oxide superconducting bulk body and the inner circumferential reinforcing ring.

12. The bulk magnet structure according to claim 1 , wherein a second outer circumferential reinforcing ring is provided between the oxide superconducting bulk body and the outer circumferential reinforcing ring.

13. The bulk magnet structure according to claim 1 , wherein the oxide superconducting bulk body contains an oxide having a structure in which RE 2 BaCuO 5 is dispersed in a monocrystalline REBa 2 Cu 3 O y , wherein RE is one or two or more elements selected from rare earth elements, and 6.8≤y≤7.1.

14. A magnet system for NMR comprising
a bulk magnet structure according to claim 1 housed in a vacuum container,
a cooling device for cooling the bulk magnet structure, and
a temperature controller for adjusting a temperature of the bulk magnet structure.

15. The magnet system for NMR according to claim 14 , wherein the oxide superconducting bulk body constituting the bulk magnet structure is in a magnetized state.

16. The bulk magnet structure according to claim 2 , wherein the plurality of oxide superconducting bulk bodies comprise a ring-shaped oxide superconducting body, and the space is capable of communicating with the outside of the bulk magnet structure, in the layering direction.

17. The bulk magnet structure according to claim 3 , wherein the space penetrates from a portion of the lateral circumferential portion of the bulk magnet structure to another portion of the lateral circumferential portion.

18. The bulk magnet structure according to claim 2 , wherein the space may be disposed in a central portion in the layering direction of the bulk magnet structure.

19. The bulk magnet structure according to claim 3 , wherein the space may be disposed in a central portion in the layering direction of the bulk magnet structure.

20. The bulk magnet structure according to claim 4 , wherein the space may be disposed in a central portion in the layering direction of the bulk magnet structure.

Assignees

• Nippon Steel & Sumitomo Metal Corp
• Nippon Steel Corp

Inventors

• Morita Mitsuru

Classifications

• A61B5/055

  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title

• H01F6/00 Primary

  Superconducting magnets; Superconducting coils {(magnetic resonance assemblies using superconducting coil systems G01R33/3815)} · CPC title

• H01F7/20

  without armatures (cores H01F3/00; coils H01F5/00 {; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381}) · CPC title

• G01R33/38

  Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field · CPC title

• G01R33/3815

  with superconducting coils, e.g. power supply therefor · CPC title