JP2020021901A - Superconducting electromagnet - Google Patents

Abstract

To provide a superconducting electromagnet in which the reliability of fixing of a flange portion and an outer peripheral portion of a support member is improved.SOLUTION: A superconducting electromagnet 7 includes a pair of coils 30A in which a superconducting wire is wound around the axis, and arranged so as to be opposite to the axial direction D1 along the axis, and a support member 40 that supports the pair of coils 30A, and the support member 40 includes, in one coil 30A, a flange portion 41 that supports the facing surface 31 in which the one coil 30A faces the other coil, an outer peripheral portion 42 supporting the outer peripheral surface 32 of the one coil 30A, and a fastening portion 43 that fastens the flange portion 41 and the outer peripheral portion 42. The flange portion 41 and the outer peripheral portion 42 have locking portions 41A and 42A that lock, respectively.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a superconducting electromagnet.

  BACKGROUND ART Conventionally, as a particle accelerator for accelerating charged particles, for example, a cyclotron described in Patent Document 1 is described. This cyclotron includes a coil and a holding member that holds the coil. The holding member has a flange portion provided for each of the two axial end surfaces of the coil, and an outer peripheral portion connecting the flange portions.

JP 2014-241217 A

  By the way, in a coil used in a particle accelerator as disclosed in Patent Document 1, a strong electromagnetic force is generated in both the radial direction and the axial direction of the coil. In order to withstand this electromagnetic force, it is necessary to fix the flange portion and the outer peripheral portion of the support member that supports the coil.

  As a method of fixing the flange portion and the outer peripheral portion, for example, welding can be considered, but when the coil is a superconducting wire, there is a possibility that the superconducting wire is deteriorated by heat during welding. Therefore, when the coil is a superconducting wire, it is necessary to fix the flange portion and the outer peripheral portion using a fastening portion such as a bolt. However, a fastening portion such as a bolt has low durability against a force in a direction intersecting the axis of the fastening portion, and the strength of the fastening portion may be insufficient. Therefore, it is required to improve the reliability of fixing the flange portion and the outer peripheral portion of the support member.

  The present invention has been made to solve the above-described problem, and has as its object to provide a superconducting electromagnet in which the reliability of fixing a flange portion and an outer peripheral portion of a support member is improved.

  A superconducting electromagnet according to one embodiment of the present invention, a superconducting wire is wound around an axis, and a pair of coils arranged in an axial direction along the axis, and a supporting member that supports the pair of coils, The support member includes, in one coil, a flange portion that supports an opposing surface in which the one coil faces the other coil, an outer peripheral portion that supports an outer peripheral surface of the one coil, and a radial direction of the coil. The outer peripheral portion has a protruding portion that protrudes radially inward from the outer peripheral surface and enters the flange portion.

  The support member of the superconducting electromagnet has a flange portion that supports the opposing surface of one of the coils, an outer peripheral portion that supports the outer peripheral surface of the coil, and extends in the radial direction of the coil to fasten the flange portion and the outer peripheral portion. The outer peripheral portion has a protruding portion that protrudes radially inward from the outer peripheral surface and enters the flange portion. Since the outer peripheral portion has such a protrusion, the electromagnetic force generated in the axial direction of the coil is dispersed not only in the flange portion but also in the outer peripheral portion. Thereby, the force applied to the fastening portion in the direction intersecting the axis of the fastening portion (that is, the axial direction of the coil) is reduced. Therefore, the reliability of fixing the flange portion and the outer peripheral portion of the support member can be improved.

  A superconducting electromagnet according to one embodiment of the present invention includes a pair of coils in which a superconducting wire is wound around an axis and arranged in an axial direction along the axis, and a support member that supports the pair of coils. The support member includes, in one coil, a flange portion that supports an opposing surface of the one coil facing the other coil, an outer peripheral portion that supports an outer peripheral surface of the one coil, and an axial direction of the coil. And a fastening portion for fastening the flange portion and the outer peripheral portion. The flange portion has a protruding portion that protrudes toward the one coil side in the axial direction from the opposing surface and enters the outer peripheral portion.

  The support member of the superconducting electromagnet includes a flange portion that supports the opposing surface of one of the coils, an outer peripheral portion that supports the outer peripheral surface of the coil, and a fastening that extends in the axial direction of the coil and fastens the flange portion and the outer peripheral portion. The flange portion has a protruding portion that protrudes toward the one coil side in the axial direction from the opposing surface and enters the outer peripheral portion. Since the flange portion has such a protrusion, the electromagnetic force generated in the radial direction of the coil is dispersed not only in the outer peripheral portion but also in the flange portion. Thereby, the force applied to the fastening portion in the direction intersecting the axis of the fastening portion (that is, the radial direction of the coil) is reduced. Therefore, the reliability of fixing the flange portion and the outer peripheral portion of the support member can be improved.

  A superconducting electromagnet according to one embodiment of the present invention includes a pair of coils in which a superconducting wire is wound around an axis and arranged in an axial direction along the axis, and a support member that supports the pair of coils. The supporting member includes, in one of the coils, a flange portion that supports an opposing surface of the one coil facing the other coil; an outer peripheral portion that supports an outer peripheral surface of the one coil; The flange portion and the outer peripheral portion each have a locking portion that locks each other.

  The support member of the superconducting electromagnet has a flange portion that supports the opposing surface of one of the coils, an outer peripheral portion that supports the outer peripheral surface of the coil, and a fastening portion that fastens the flange portion to the outer peripheral portion. Each of the portion and the outer peripheral portion has a locking portion that locks each other. Since each of the flange portion and the outer peripheral portion has such a locking portion, the electromagnetic force generated in the axial direction of the coil is dispersed not only in the flange portion but also in the outer peripheral portion. Similarly, the electromagnetic force generated in the radial direction of the coil is distributed not only to the outer peripheral portion but also to the flange portion. Thereby, the force applied to the fastening portion in the direction intersecting the axis of the fastening portion is reduced. Therefore, the reliability of fixing the flange portion and the outer peripheral portion of the support member can be improved.

  In one embodiment, the locking portion may be provided inside the outer peripheral surface. According to this configuration, the size of the support member in the radial direction of the coil can be reduced, so that the size of the superconducting electromagnet can be reduced.

  In one embodiment, a locking surface where the locking portion of the flange portion and the locking portion of the outer peripheral portion face each other may be inclined with respect to the axial direction when viewed from a direction intersecting with the axial direction. Since the locking surface is inclined in this manner, when an axial electromagnetic force is applied to the flange portion, a force inward in the radial direction is applied to the outer peripheral portion by the locking portion. Similarly, when a radial electromagnetic force is applied to the outer peripheral portion, a force toward the coil side in the axial direction is applied to the flange portion by the locking portion. That is, when an electromagnetic force is generated due to the slanted paper surface, the flange portion and the outer peripheral portion are more firmly locked. Therefore, the flange portion and the outer peripheral portion can be more firmly fixed.

  According to the present invention, there is provided a superconducting electromagnet in which the reliability of fixing the flange portion and the outer peripheral portion of the support member is improved.

1 is a schematic cross-sectional view illustrating a particle accelerator on which a superconducting electromagnet according to an embodiment of the present invention is mounted. FIG. 1 is a schematic sectional view showing a superconducting electromagnet according to one embodiment of the present invention. FIG. 3 is a plan view schematically showing the superconducting electromagnet of FIG. 2. It is a schematic sectional drawing which shows the fastening structure of a flange part and an outer peripheral part. It is a schematic sectional drawing which shows the fastening structure of the flange part and outer peripheral part in the superconducting electromagnet which concerns on a modification. It is a schematic sectional drawing which shows the fastening structure of the flange part and outer peripheral part in the superconducting electromagnet which concerns on another modification. It is a schematic sectional drawing which shows the fastening structure of the flange part and outer peripheral part in the superconducting electromagnet which concerns on another modification. It is a schematic sectional drawing which shows the fastening structure of the flange part and outer peripheral part in the superconducting electromagnet which concerns on another modification.

  Hereinafter, various embodiments will be described in detail with reference to the drawings. In each of the drawings, the same or corresponding portions are denoted by the same reference characters, and redundant description will be omitted.

  FIG. 1 is a schematic sectional view showing a particle accelerator on which a superconducting electromagnet according to the present embodiment is mounted. The particle accelerator 1 shown in FIG. 1 is, for example, a neutron capture therapy system that performs a cancer treatment using boron neutron capture therapy (BNCT: Boron Neutron Capture Therapy). This is a cyclotron used to accelerate particles to generate and emit charged particle beams. The charged particles include, for example, protons, heavy particles (heavy ions), electrons, and the like. Further, the particle accelerator 1 can also be used as a cyclotron for PET, a cyclotron for RI production, a cyclotron for nuclear experiments, and the like. As shown in FIG. 1, the particle accelerator 1 includes a yoke 2, a superconducting electromagnet 3, a pair of magnetic poles 4A and 4B, and a vacuum vessel 5.

  The yoke 2 supports the superconducting electromagnet 3, the pair of magnetic poles 4A and 4B, the vacuum vessel 5, and the like. The yoke 2 is a hollow disk-shaped block, in which a pair of magnetic poles 4A and 4B for forming a magnetic field necessary for accelerating charged particles are provided. The magnetic poles 4A and 4B have a circular shape in plan view, and are arranged to face each other across a median plane MP (an acceleration plane where charged particles are accelerated). Superconducting electromagnet 3 is arranged around magnetic poles 4A and 4B. The detailed configuration of the superconducting electromagnet 3 will be described later.

  The superconducting electromagnet 3 is housed in a vacuum vessel 5. A cryostat capable of cooling the coil of the superconducting electromagnet 3 to a superconducting state is constituted by the vacuum vessel 5 and a cooler (not shown). As the refrigerator, for example, a GM refrigerator (Gifford-McMhon cooler) can be used. The type of refrigerator is not limited to the GM refrigerator, but may be another refrigerator such as a Stirling refrigerator. In the particle accelerator 1, a strong magnetic field is formed by applying a current to the coil of the superconducting electromagnet 3, which has been brought into a superconducting state by a cooler, after the inside of the vacuum vessel 5 is evacuated. Charged particles supplied from an ion source (not shown) are accelerated by the influence of a magnetic field on the median plane MP in the space between the magnetic poles 4A and 4B, and are emitted as charged particle beams.

Next, the configuration of the superconducting electromagnet 3 will be described in detail with reference to FIGS. FIG. 2 is a schematic sectional view showing the superconducting electromagnet according to the present embodiment. FIG. 3 is a plan view schematically showing the superconducting electromagnet of FIG. As shown in FIGS. 2 and 3, the superconducting electromagnet 3 has a cylindrical shape as a whole, and includes a pair of coils 30A and 30B and a support member 40 that supports the pair of coils 30A and 30B. I have. Each of the coils 30A and 30B is annular, and is formed by winding a superconducting wire around an axis A. In a cross section along the axis A, the coils 30A and 30B are rectangular. The coils 30A and 30B are arranged to face each other in the axial direction D1 along the axis A. The coil 30A is arranged so as to surround the magnetic pole 4A, and the coil 30B is arranged so as to surround the magnetic pole 4B (see FIG. 1). Each of the coils 30A and 30B has an opposing surface 31 facing each other and an outer peripheral surface 32 located outside the radial direction D2 of the coils 30A and 30B. The facing surface 31 is a plane extending along a direction intersecting (perpendicular to) the axial direction D1 (the axis A), and the outer peripheral surface 32 is a surface extending along the axial direction D1 and extending in the radial direction D2 of the coils 30A and 30B. is there. The superconducting wire constituting the coil 30A, the 30B, for example, an oxide superconductor (e.g. Bi-2223-based, Bi2212, Y123), can be used a high-temperature superconducting wire of MgB _2, or the like. Note that a low-temperature superconducting wire may be used as the superconducting wire.

  The support member 40 includes, in each of the coils 30A and 30B, a flange portion 41 that supports the facing surface 31 in which one coil 30A (coil 30B) faces the other coil 30B (coil 30A), and an outer periphery of the coils 30A and 30B. It has an outer peripheral portion 42 that supports the surface 32, and a later-described fastening portion 43 (see FIG. 4) that fastens the flange portion 41 and the outer peripheral portion 42. The flange portion 41 is an annular plate-shaped member extending along a direction intersecting the axial direction D1 (that is, a direction along the facing surface 31). The outer peripheral portion 42 is a cylindrical member along the outer peripheral surface 32. In the present embodiment, the flange portion 41 and the facing surface 31 are in contact with each other. Further, the outer peripheral portion 42 and the outer peripheral surface 32 are also in contact with each other. The flange portion 41 and the outer peripheral portion 42 are fastened so as to be substantially perpendicular to each other. The flange portion 41 supporting the coil 30A and the flange portion 41 supporting the coil 30B are connected by a cylindrical connection portion C. As a material for forming the flange portion 41, the outer peripheral portion 42, and the connection portion C, a non-magnetic material such as stainless steel can be used to reduce the influence on the magnetic field. Further, from the viewpoint of weight reduction, titanium or the like may be used.

  Next, a fastening structure between the flange portion 41 and the outer peripheral portion 42 will be described with reference to FIG. FIG. 4 is a schematic cross-sectional view showing a fastening structure between the flange portion and the outer peripheral portion. Although FIG. 4 shows only a part of the flange portion 41 supporting the coil 30A and a part of the outer peripheral portion 42, the fastening structure between the flange portion 41 supporting the coil 30B and the outer peripheral portion 42 is the same. As shown in FIG. 4, the outer peripheral portion 42 has a protruding portion 44 that protrudes inward in the radial direction D2 from the outer peripheral surface 32 of the coil 30 </ b> A and enters the flange portion 41. The protruding portion 44 is provided at one end of the outer peripheral portion 42 on the flange portion 41 side over the entire circumference in the radial direction D2. The flange 41 is provided with a notch 45 corresponding to the protrusion 44. Here, the notch portion 45 is a portion whose thickness is smaller than the thickness of the flange portion 41 (that is, the dimension in the axial direction D1). In the present embodiment, the notch 45 is provided at the end of the flange 41 on the side opposite to the coil 31A in the axial direction D1. The notch 45 may be provided at the center of the flange 41 in the axial direction D1. The flange portion 41 and the outer peripheral portion 42 are fastened by a fastening portion 43 such as a bolt extending in the radial direction D2 of the coil 30A in a state where the protrusion portion 44 and the notch portion 45 are fitted. The fastening portion 43 penetrates the outer peripheral portion 42 at a portion where the protrusion 44 is not provided. Here, the “projection” of the protrusion 44 into the flange 41 includes a portion where the flange 41 and the protrusion 44 overlap each other when viewed from the axial direction D1, and the flange 44 when viewed from the radial direction D2. This is a state where there is a portion where the projection 41 and the projection 44 overlap. That is, in the present embodiment, the “entrance” of the protruding portion 44 into the flange portion 41 refers to a state where at least a part of the protruding portion 44 is fitted into the cutout portion 45 of the flange portion 41 of the flange portion 41. In addition, the protrusion part 44 does not need to be provided over the entire circumference in the radial direction D2, and may be provided only at a portion corresponding to the fastening part 43, for example.

  As described above, the support member 40 of the superconducting electromagnet 3 includes the flange portion 41 that supports the facing surface 31 of the coils 30A and 30B, the outer peripheral portion 42 that supports the outer peripheral surface 32 of the coils 30A and 30B, and the coil 30A. , 30B extending in the radial direction D2 to fasten the flange portion 41 and the outer peripheral portion 42. The outer peripheral portion 42 projects more inward than the outer peripheral surface 32 in the radial direction D2, and the flange portion 41 is provided. It has a projecting portion 44 that enters. In the superconducting electromagnet 3, as shown in FIG. 4, when the coil 30A and the coil 30B attract each other, a strong electromagnetic force F1 is generated in the axial direction D1. Further, the wound superconducting wire of the coils 30A and 30B tends to spread outward due to the influence of the magnetic field, and as a result, a strong electromagnetic force F2 is generated in the radial direction D2 of the coils 30A and 30B. However, the fastening portion 43 such as a bolt has low durability against a force in a direction intersecting the shaft 43A of the fastening portion 43, and the strength of the fastening portion 43 may be insufficient.

  On the other hand, in the superconducting electromagnet 3, since the outer peripheral portion 42 has the protruding portion 44, the electromagnetic force F1 generated in the axial direction D1 of the coils 30 </ b> A and 30 </ b> Is also distributed. Thereby, the force F1 'of the fastening portion 43 in the direction intersecting the axis 43A of the fastening portion 43 (i.e., the axial direction D1) is reduced. Therefore, the reliability of fixing the flange portion 41 and the outer peripheral portion 42 of the support member 40 can be improved. In addition, the reduction of the force F <b> 1 ′ related to the fastening portion 43 makes it possible to reduce the size of the fastening portion 43 and reduce the number of the fastening portions 43. Therefore, the size of the superconducting electromagnet 3 can be reduced.

  Next, a superconducting electromagnet 6 according to a modification will be described with reference to FIG. FIG. 5 is a schematic sectional view showing a fastening structure between a flange portion and an outer peripheral portion in a superconducting electromagnet according to a modification. As shown in FIG. 5, the superconducting electromagnet 6 includes a pair of coils 30A and 30B and a support member 40 that supports the pair of coils 30A and 30B, like the superconducting electromagnet 3. The support member 40 has a flange portion 41 and an outer peripheral portion 42. The superconducting electromagnet 6 is different from the superconducting electromagnet 3 in that a projecting portion 44 is provided on a flange portion 41, a notch portion 45 is provided on an outer peripheral portion 42, and a fastening portion 43 is formed in the axial direction D1. It is a point that is stretched. The protruding portion 44 is provided at one end on the radially outer side of the flange portion 41 over the entire circumference in the radial direction D2. It projects toward the coil 30 </ b> A side in the axial direction D <b> 1 and enters the outer peripheral portion 42. The fastening portion 43 penetrates through the flange portion 41 at a portion where the protrusion 44 is not provided.

  In the above-described superconducting electromagnet 6, the flange portion 41 has a protruding portion 44 that protrudes from the opposing surface 31 toward the one coil 30A (or the coil 30B) in the axial direction D1 and enters the outer peripheral portion 42. Since the flange portion 41 has such a protrusion 44, the electromagnetic force F2 generated in the radial direction D2 of the coil 30A is dispersed not only in the outer peripheral portion 42 but also in the flange portion 41. Thereby, the force F2 'applied to the fastening portion 43 in the direction intersecting the axis 43A of the fastening portion 43 (that is, the radial direction D2) is reduced. Therefore, similarly to the superconducting electromagnet 3, the reliability of fixing the flange portion 41 and the outer peripheral portion 42 of the support member 40 can be improved.

  Next, a superconducting electromagnet 7 according to another modification will be described with reference to FIG. FIG. 6 is a schematic sectional view showing a fastening structure between a flange portion and an outer peripheral portion in a superconducting electromagnet according to another modification. As shown in FIG. 6, the superconducting electromagnet 7 includes a pair of coils 30A and 30B and a support member 40 that supports the pair of coils 30A and 30B, like the superconducting electromagnet 3. The support member 40 has a flange portion 41 and an outer peripheral portion 42. The superconducting electromagnet 7 differs from the superconducting electromagnet 3 in that each of the flange portion 41 and the outer peripheral portion 42 has locking portions 41A and 42A that lock each other. The locking portion 41A of the flange portion 41 and the locking portion 42A of the outer peripheral portion 42 are provided inside the outer peripheral surface 32 of the coil 30A. When viewed from a direction intersecting with the axial direction D1, a locking surface 46 where the locking portion 41A of the flange portion 41 and the locking portion 42A of the outer peripheral portion 42 face each other is inclined with respect to the axial direction D1. The inclination angle of the locking surface 46 can be, for example, about 30 ° to 60 °. In the present embodiment, the locking portion 41A and the locking portion 42A are in contact with each other on the respective locking surfaces 46, and the inclination angle of the locking surface 46 is about 45 °. The fastening portion 43 extends along the axial direction D1 so as to pass through the locking portion 41A and the locking portion 42A. In addition, the fastening portion may extend along the radial direction D2.

  In the superconducting electromagnet 7 described above, each of the flange portion 41 and the outer peripheral portion 42 has locking portions 41A and 42A that lock with each other. Since each of the flange portion 41 and the outer peripheral portion 42 has such locking portions 41A and 42A, the electromagnetic force F1 generated in the axial direction D1 of the coils 30A and 30B is not limited to the flange portion 41 but to the outer periphery. It is also distributed to the unit 42. Similarly, the electromagnetic force F2 generated in the radial direction D2 of the coils 30A and 30B is dispersed not only in the outer peripheral portion 42 but also in the flange portion 41. Thereby, the force applied to the fastening portion 43 in the direction intersecting the shaft 43A of the fastening portion 43 is reduced. Therefore, similarly to the superconducting electromagnet 3, the reliability of fixing the flange portion 41 and the outer peripheral portion 42 of the support member 40 can be improved.

  The locking portions 41A and 42A are provided inside the outer peripheral surface 32. Thus, the size of the support member 40 in the radial direction D2 of the coils 30A and 30B can be reduced, so that the size of the superconducting electromagnet 7 can be reduced. Further, the size of the vacuum vessel 5 containing the superconducting electromagnet 7 can be reduced.

  When viewed from a direction intersecting with the axial direction D1, the locking surface 46 where the locking portion 41A of the flange portion 41 and the locking portion 42A of the outer peripheral portion 42 face each other is inclined with respect to the axial direction D1. I have. Accordingly, when the electromagnetic force F1 in the axial direction D1 is applied to the flange portion 41, a force F3 inward in the radial direction D2 is applied to the outer peripheral portion 42 by the locking portions 41A and 42A. Similarly, when an electromagnetic force F2 in the radial direction D2 is applied to the outer peripheral portion 42, a force F4 toward the coil 30A in the axial direction D1 is applied to the flange portion 41 by the locking portions 41A and 42A. That is, when the locking surfaces 46 are inclined and the electromagnetic forces F1 and F2 are generated, the flange portion 41 and the outer peripheral portion 42 are more firmly locked. Therefore, the flange portion 41 and the outer peripheral portion 42 can be more firmly fixed.

  Next, a superconducting electromagnet 8 according to a modification of the superconducting electromagnet 7 shown in FIG. 6 will be described with reference to FIG. FIG. 7 is a schematic sectional view showing a fastening structure between a flange portion and an outer peripheral portion in a superconducting electromagnet according to another modification. As shown in FIG. 7, the superconducting electromagnet 8 differs from the superconducting electromagnet 7 in that the superconducting electromagnet 8 further includes a connection plate 47 for connecting the flange portion 41 and the outer peripheral portion 42. The connection plate 47 is an annular plate-shaped member, and is disposed outside the flange portion 41. The fastening portion 43 extends through the connection plate 47 along the axial direction D <b> 1. The fastening portion 43 fastens the flange portion 41 to the connection plate 47 and the outer peripheral portion 42 to the connection plate 47. And the outer peripheral portion 42 are fastened.

  In the superconducting electromagnet 8 described above, similarly to the superconducting electromagnet 7, the flange portion 41 and the outer peripheral portion 42 have locking portions 41A and 42A that lock each other. The locking surfaces 46 of the locking portions 41A and 42A are inclined with respect to the axial direction D1. Therefore, the same effect as the superconducting electromagnet 7 can be obtained also in the superconducting electromagnet 8. In addition, since the flange portion 41 and the outer peripheral portion 42 are fastened via the connection plate 47, the fastening portion 43 is attached to the locking portions 41A and 42A where displacement between the flange portion 41 and the outer peripheral portion 42 is likely to occur. Since it is not necessary to arrange, the force applied to the fastening portion 43 can be further reduced.

  Next, a superconducting electromagnet 9 according to a modification of the superconducting electromagnet 7 shown in FIG. 6 will be described with reference to FIG. FIG. 8 is a schematic sectional view showing a fastening structure between a flange portion and an outer peripheral portion in a superconducting electromagnet according to another modification. As shown in FIG. 8, superconducting electromagnet 9 differs from superconducting electromagnet 7 in that locking surfaces 46 of locking portions 41A and 42A are not inclined. When viewed from a direction intersecting with the axial direction D1, the locking surface 46 where the locking portion 41A of the flange portion 41 and the locking portion 42A of the outer peripheral portion 42 face each other has a stepped shape. Also in this case, since the electromagnetic forces F1 and F2 are dispersed similarly to the superconducting electromagnet 7, the force applied to the fastening portion 43 in the direction intersecting the axis 43A of the fastening portion 43 is reduced. Therefore, the reliability of fixing the flange portion 41 and the outer peripheral portion 42 of the support member 40 can be improved.

  The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various changes can be made. For example, in the above-described embodiment, an example in which the particle accelerator 1 includes the superconducting electromagnet 3 has been described, but the device using the superconducting electromagnet 3 is not limited to the particle accelerator. As an example, the superconducting electromagnet 3 may be applied to an MRI apparatus.

  Further, in the above embodiment, the example in which the protrusions 44 are provided on both the flange portion 41 or the outer peripheral portion 42 that supports the coil 30A and the coil 30B has been described, but one of the coils 30A (or the coil 30B) is provided. The protruding portion may be provided only on the supporting flange portion 41 or the outer peripheral portion 42. Similarly, in superconducting electromagnet 7 shown in FIG. 6, only flange portion 41 and outer peripheral portion 42 that support one coil 30A (or coil 30B) may have locking portions 41A and 42A. .

  3, 6, 7, 8, 9 ... superconducting electromagnet, 30A, 30B ... coil, 31 ... facing surface, 32 ... outer peripheral surface, 40 ... support member, 41 ... flange portion, 41A ... locking portion, 41A, 42A ... Locking portion, 42: outer peripheral portion, 43: fastening portion, 44: projecting portion, 46: locking surface, A: axis, D1: axial direction, D2: radial direction.

Claims (5)

A pair of coils in which a superconducting wire is wound around an axis, and arranged in an axial direction along the axis,
A supporting member for supporting the pair of coils,
The support member,
In one of the coils, a flange portion in which the one coil supports a facing surface facing the other coil,
An outer peripheral portion supporting the outer peripheral surface of the one coil,
Extending in the radial direction of the coil, having a fastening portion for fastening the flange portion and the outer peripheral portion,
The superconducting electromagnet, wherein the outer peripheral portion has a protruding portion that protrudes inward in the radial direction from the outer peripheral surface and enters the flange portion. A pair of coils in which a superconducting wire is wound around an axis, and arranged in an axial direction along the axis,
A supporting member for supporting the pair of coils,
The support member,
In one of the coils, a flange portion in which the one coil supports a facing surface facing the other coil,
An outer peripheral portion supporting the outer peripheral surface of the one coil,
A fastening portion extending in the axial direction of the coil and fastening the flange portion and the outer peripheral portion,
The superconducting electromagnet, wherein the flange portion has a protruding portion that protrudes from the facing surface toward the one coil side in the axial direction and enters the outer peripheral portion. A pair of coils in which a superconducting wire is wound around an axis, and arranged in an axial direction along the axis,
A supporting member for supporting the pair of coils,
The support member,
In one of the coils, a flange portion in which the one coil supports a facing surface facing the other coil,
An outer peripheral portion supporting an outer peripheral surface of one of the coils,
Having a fastening portion for fastening the flange portion and the outer peripheral portion,
A superconducting electromagnet, wherein each of the flange portion and the outer peripheral portion has a locking portion that locks each other.   The superconducting electromagnet according to claim 3, wherein the locking portion is provided inside the outer peripheral surface.   When viewed from a direction intersecting with the axial direction, a locking surface where the locking portion of the flange portion and the locking portion of the outer peripheral portion face each other is inclined with respect to the axial direction. Item 5. A superconducting electromagnet according to item 3 or 4.

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