JP6033642B2 - Superconducting magnet device - Google Patents

Description

  The present invention relates to a superconducting magnet device.

  Conventionally, as a superconducting magnet device, for example, a device described in Patent Document 1 is known. This apparatus has a cylindrical vacuum vessel. A heat shield that forms an annular space is disposed in the vacuum vessel. In the annular space, two superconducting coils are arranged concentrically with the inner cylinder portion of the vacuum vessel. The two superconducting coils are arranged so as to overlap in the radial direction. Each superconducting coil is formed into a cylindrical shape by winding a superconducting wire around a winding frame, then impregnating and curing the epoxy resin, and removing the winding frame.

  A heat absorbing member made of a metal material having good thermal conductivity is bonded to the outer peripheral side of each superconducting coil. The heat absorbing member has a cylindrical portion that is bonded to the outer peripheral surface of the superconducting coil, and an annular portion that protrudes radially inward from one end of the cylindrical portion and is bonded to the end surface of the superconducting coil. The superconducting coil and the heat absorbing member are integrated and suspended within the heat shield by the support member. A cooling stage of a GM (Gifford McMahon) refrigerator is thermally connected to the annular portion of the heat absorbing member via a flexible heat conducting member. The heat conduction member is cooled to a temperature of 4K or less by the GM refrigerator.

JP-A-7-142242

  However, conventionally, in a superconducting magnet device having a plurality of superconducting coils, the arrangement of the superconducting coils, which requires a complicated force during operation, may affect the stability of the device.

  An object of the present invention is to provide a superconducting magnet device that can obtain a sufficient cooling efficiency while performing stable operation in a superconducting magnet device having a plurality of superconducting coils.

The superconducting magnet device of the present invention is arranged concentrically about the axis, is arranged on one side of the superconducting coil in the axial direction, and is superposed on one side of the superconducting coil in the axial direction and cooled by the cooling means. At least one of the heat conductive plate-like portion, the heat conductive positioning portion provided between the plate-like portion and the superconducting coil to form a block, and positioning each of the superconducting coils in the axial direction; A heat transfer member that thermally connects the outer peripheral portion and the positioning portion in the two, and has a protruding portion that protrudes in the axial direction from the superconducting coil and contacts the positioning portion, and so as to face the protruding portion a cutout portion formed in the positioning portion is disposed in the notch portion, and a fixing portion for fixing the projecting portion relative to the positioning unit, positioning unit, it and the plate-like portion It is arranged without a gap between the LES superconducting coil.

According to this superconducting magnet device, the heat conductive positioning part is provided between the plate-like part and the superconducting coil. By providing the positioning portion, each of the superconducting coils is positioned in the axial direction. Therefore, the movement of the superconducting coil in the axial direction is restricted, and stable operation is possible. Moreover, the positioning portion has heat transfer properties and is thermally connected to at least one of the superconducting coils by the heat transfer member. Therefore, the superconducting coil is cooled by the cooling means using the plate-like portion having heat conductivity, the positioning portion, and the heat transfer member as cooling paths. Therefore, sufficient cooling efficiency can be obtained. The range in which the heat transfer member abuts against the positioning portion can be increased, and the cooling efficiency can be improved. A notch portion is formed in the positioning portion, and the protruding portion is fixed by a fixing portion arranged in the notch portion. Therefore, even if it is a case where the space between a plate-shaped part and a superconducting coil is restricted, a protrusion part can be fixed without trouble.

The superconducting magnet device of the present invention includes a plurality of superconducting coils arranged concentrically about an axis, and a thermally conductive plate-like portion arranged on one side of the superconducting coil in the axial direction and cooled by cooling means. And a heat conductive positioning part that is provided between the plate-like part and the superconducting coil to form a block shape and positions each of the superconducting coils in the axial direction, and an outer peripheral part and a positioning part in at least one of the superconducting coils A heat transfer member that has a protrusion protruding in an axial direction from the superconducting coil and contacting the positioning portion, and a cut formed in the positioning portion so as to face the protrusion. A notch portion, and a fixing portion that is disposed in the notch portion and fixes the protruding portion to the positioning portion.

  Further, the protrusion is fixed from the axial direction by the fixing portion. Since the positioning portion extends in the direction perpendicular to the axial direction, it is difficult to fix the fixing portion. According to said structure, since it fixes by a fixing part from an axial direction, a protrusion part can be fixed easily.

  The fixing portion includes a connection member joined to the protruding portion and a bolt that fixes the connection member to the positioning portion. According to this configuration, the protrusion is fixed by the bolt via the connection member. Therefore, even when the heat transfer member, that is, the protruding portion is a thin plate, the connecting member can be provided with strength, and the protruding portion can be reliably fixed.

  According to the present invention, in a superconducting magnet device provided with a plurality of superconducting coils, sufficient cooling efficiency can be obtained while performing stable operation.

It is sectional drawing which shows schematic structure of one Embodiment of the superconducting magnet apparatus which concerns on this invention. It is sectional drawing which expands and shows the superconducting coil vicinity of FIG. It is the III-III sectional view taken on the line of FIG. It is typical sectional drawing which shows the attachment structure of the heat-transfer member in the superconducting coil of an inner peripheral side. It is sectional drawing which shows the fixing structure of the cooling plate with respect to a spacer.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the superconducting magnet device 1 is a device for generating a high magnetic field. The superconducting magnet device 1 includes an annular vacuum vessel 2, an annular heat shield 3 disposed in the vacuum vessel 2, and a superconducting magnet 10 disposed in the heat shield 3. The vacuum vessel 2 is also called a cryostat. In the center of the heat shield 3, for example, an aluminum cylinder 4 is provided. The inside of the cylinder 4 is a room temperature region.

  The superconducting magnet device 1 is applied to, for example, a silicon single crystal pulling device by MCZ (magnetic field application Czochralski) method. The superconducting magnet apparatus 1 may be applied to a cyclotron that accelerates charged particles and outputs a charged particle beam. The superconducting magnet device 1 can be applied to any device as long as it requires a high magnetic field.

  The superconducting magnet 10 includes four annular superconducting coils 11, 12, 13, and 14 arranged concentrically about the axis X. Superconducting coils 11, 12, 13, and 14 are multilayered coil bodies arranged so as to overlap in the radial direction. The superconducting magnet 10 generates a strong magnetic field by causing a current to flow through the superconducting coils 11, 12, 13, and 14 that are cooled by the GM refrigerator (cooling means) 6 and put into a superconducting state.

  Hereinafter, the configuration of the superconducting magnet 10 will be described in more detail. The superconducting coil 11 is formed, for example, by winding a winding around a stainless steel winding frame 15 and solidifying the winding with an adhesive such as an epoxy resin. The first coil portion A on the innermost side (that is, on the side of the axis X) is configured to include the winding frame 15 and the superconducting coil 11. Outside the first coil portion A in the radial direction, a second coil portion B, a third coil portion C, and a fourth coil portion D configured in the same manner as the first coil portion A are arranged in this order. ing. The second coil portion B has a superconducting coil 12 and a stainless steel winding frame 16. The third coil part C has a superconducting coil 13 and a stainless steel winding frame 17. The fourth coil portion D has a superconducting coil 14 and a stainless steel winding frame 18.

  In the coil portions A and B on the inner peripheral side and the coil portions C and D on the outer peripheral side, the material of the winding may be the same, or the material of the winding may be different. For example, superconducting coils 11 and 12 may use windings made of tin niobate, and superconducting coils 13 and 14 may use windings made of niobium titanium.

  The superconducting coil 11 of the first coil part A, the superconducting coil 12 of the second coil part B, the superconducting coil 13 of the third coil part C, and the superconducting coil 14 of the fourth coil part D are long in the axis X direction. That is, the height is different. The height of the superconducting coils 11 to 14 increases as it goes outward in the radial direction. In other words, the height of the superconducting coil 11 is smaller than the height of the superconducting coil 12. The height of the superconducting coil 12 is smaller than the height of the superconducting coil 13. The height of the superconducting coil 13 is smaller than the height of the superconducting coil 14. The difference in height between the superconducting coil 11 and the superconducting coil 12, the difference in height between the superconducting coil 12 and the superconducting coil 13, and the difference in height between the superconducting coil 13 and the superconducting coil 14 may be similar. And may be different.

  Further, in the superconducting coil 11, the superconducting coil 12, the superconducting coil 13, and the superconducting coil 14, the positions of the centers in the axis X direction, that is, the height direction are coincident. The center positions of the superconducting coils 11, 12, 13, 14 in the height direction coincide with a virtual plane Y orthogonal to the axis X.

  With the above configuration, one end (the upper end in FIG. 1) and the other end (the lower end in FIG. 1) of the first coil portion A, the second coil portion B, the third coil portion C, and the fourth coil portion D in the axis X direction. Is a stepped shape protruding in the direction of the axis X as it goes outward in the radial direction.

  The superconducting magnet 10 has a thermally conductive flange (plate-like portion) 20 disposed on one side (upper side in FIG. 1) of the superconducting coils 11, 12, 13, and 14 in the axis X direction. The flange 20 has a disk shape, and is made of, for example, copper. The flange 20 has a larger diameter than the outermost superconducting coil 14 and extends radially outward from the superconducting coils 11, 12, 13, 14. A cooling stage of the GM refrigerator 6 is connected to the extending portion of the flange 20 through a heat transfer plate 7 at one place in the circumferential direction. The flange 20 is cooled by the GM refrigerator 6. Note that a plurality of cooling means may be connected to the flange 20.

  As shown in FIGS. 1 and 2, annular spacers (positioning portions) 21, 22, and 23 are disposed between the flange 20 and the superconducting coils 11, 12, and 13. The spacer 21 is disposed between the first coil portion A and the flange 20. The spacer 22 is disposed between the second coil part B and the flange 20. The spacer 23 is disposed between the third coil portion C and the flange 20. Each of the spacers 21, 22, and 23 has a block shape, and is made of, for example, copper. The thermally conductive spacers 21, 22, and 23 are fixed to the flange 20 by bolts or the like. Further, the spacers 21, 22, 23 are flange portions 15 b of the winding frame 15 of the first coil portion A, flange portions 16 b of the winding frame 16 of the second coil portion B, and flange portions of the winding frame 17 of the third coil portion C. Each is fixed to 17b with a bolt or the like. The spacers 21, 22, and 23 are in contact with the flange 20 and each of the flange portions 15b, 16b, and 17b.

  A flange portion 18 b of the winding frame 18 disposed between the flange 20 and the superconducting coil 14 is in contact with the flange 20 and is fixed to the flange 20 with a bolt or the like. Regarding the superconducting coil 14, the flange 20 also serves as a positioning portion. An annular and copper spacer may be disposed between the flange 20 and the superconducting coil 14.

  The spacers 21, 22, and 23 are interposed between the flange 20 and each of the flange portions 15b, 16b, and 17b without a gap. In other words, the spacers 21, 22, and 23 are filled between the flange 20 and each of the superconducting coils 11, 12, and 13. The lower ends of the spacers 21, 22, 23 correspond to the stepped shape of one end in the axis X direction of the first coil part A, the second coil part B, the third coil part C, and the fourth coil part D, It has a staircase shape.

  An annular spacer 26 is provided at the other end in the axis X direction of the first coil part A, the second coil part B, the third coil part C, and the fourth coil part D. The spacer 26 has a stepped outer shape corresponding to the shapes of the other ends of the first coil portion A, the second coil portion B, the third coil portion C, and the fourth coil portion D. The spacer 26 has a block shape and is made of, for example, copper. The thermally conductive spacer 26 includes a flange portion 15c of the winding frame 15 of the first coil portion A, a flange portion 16c of the winding frame 16 of the second coil portion B, a flange portion 17c of the winding frame 17 of the third coil portion C, The fourth coil portion D is fixed to the flange portion 18c by bolts or the like. The spacer 26 is in contact with each of the flange portions 15c, 16c, 17c, and 18c.

  The superconducting magnet 10 integrated by the above configuration is supported by the support member 8 at a plurality of locations in the circumferential direction. In other words, the superconducting magnet 10 is suspended from the vacuum vessel 2 by the plurality of support members 8. On the side of the lower part of the superconducting magnet 10, restricting members 9 are arranged at a plurality of locations in the circumferential direction. The restricting member 9 restricts the movement of the superconducting magnet 10 in the radial direction.

  In the superconducting magnet 10, the spacers 21, 22, and 23 position the superconducting coils 11, 12, and 13 in the axis X direction. Thereby, the center positions in the height direction of the superconducting coils 11, 12, 13, 14 coincide with the virtual plane Y. Further, the first coil portion A, the second coil portion B, the third coil portion C, and the fourth coil portion D are sandwiched from both sides in the axis X direction by the flange 20, the spacers 21, 22, 23, and the spacer 26. As a result, the superconducting coils 11, 12, 13, and 14 are more reliably positioned in the axis X direction. In other words, the spacers 21, 22, 23 and the spacer 26 support the superconducting coils 11, 12, 13, 14 from the axis X direction.

  The cooling structure in the superconducting magnet 10 will be described in detail with reference to FIGS. As shown in FIGS. 2 and 3, cylindrical cooling plates (heat transfer members) 31, 32, and 33 are fixed to the outer peripheral portions of the superconducting coils 11, 12, and 13. The cooling plates 31, 32, and 33 are heat transfer plates having thermal conductivity, and are made of, for example, copper. The thickness of the cooling plates 31, 32, 33 is, for example, about 0.2 mm. A gap may be formed between the cooling plate 31 and the cylindrical portion 16a of the winding frame 16, or the cooling plate 31 and the cylindrical portion 16a of the winding frame 16 may be in close contact via an insulating material. Good. A gap may be formed between the cooling plate 32 and the cylindrical portion 17a of the winding frame 17, or the cooling plate 32 and the cylindrical portion 17a of the winding frame 17 may be in close contact via an insulating material. Good. A gap may be formed between the cooling plate 33 and the cylindrical portion 18a of the winding frame 18, and the cooling plate 33 and the cylindrical portion 18a of the winding frame 18 may be in close contact with each other via an insulating material. Good.

  The cooling plates 31, 32, 33 are provided between the superconducting coils 11, 12, 13 and the spacers 21, 22, 23 and have a function of increasing the cooling efficiency in the superconducting magnet 10. The cooling plates 31, 32, 33 suppress the occurrence of so-called quenching and enable stable operation.

  Each of the cooling plates 31, 32, 33 protrudes from the superconducting coils 11, 12, 13 in the axis X direction. More specifically, each of the cooling plates 31, 32, 33 protrudes from the first coil part A, the second coil part B, and the third coil part C in the axis X direction. That is, each of the cooling plates 31, 32, 33 has protrusions 31a, 32a, 33a protruding from the superconducting coils 11, 12, 13 in the direction of the axis X at one end (upper end in FIG. 2). Yes. The protrusions 31a, 32a, and 33a extend in the circumferential direction, and are in contact with the outer peripheral surfaces of the spacers 21, 22, and 23 in a planar shape. The cooling plates 31, 32, 33 are provided over the entire outer peripheral portion of the superconducting coils 11, 12, 13 and extend to the position of the lower end of the superconducting coils 11, 12, 13. Thus, the cooling plates 31, 32, 33 thermally connect the outer peripheral portions of the superconducting coils 11, 12, 13 and the spacers 21, 22, 23.

  With reference to FIG. 4, the attachment structure of the cooling plates 31 and 32 in the 1st coil part A and the 2nd coil part B is demonstrated. FIG. 4 is a schematic cross-sectional view showing the mounting structure of the cooling plates 31 and 32 in the superconducting coils 11 and 12. An insulating material 36 is provided between the winding frames 15 and 16 and the superconducting coils 11 and 12. An insulating material 37 is provided between the superconducting coils 11 and 12 and the cooling plates 31 and 32. The protrusions 31a and 32a, which are the upper ends of the cooling plates 31 and 32, are fixed to the spacers 21 and 22 by annular and stainless steel reinforcing plates 38 and bolts 39 provided at a plurality of locations in the circumferential direction. .

  With reference to FIG. 3 and FIG. 5, the attachment structure of the cooling plate 33 in the 3rd coil part C is demonstrated. 3 is a cross-sectional view taken along the line III-III in FIG. 1, and FIG. 5 is a cross-sectional view showing a fixing structure of the cooling plate 33 to the spacer 23. As shown in FIGS. 3 and 5, the spacer 23 is formed with notches 23 a at a plurality of locations in the circumferential direction so as to face the protrusions 33 a. The notch 23 a is formed in the upper part of the outer periphery of the spacer 23. The notch 23a is opened outward in the radial direction and upward. By forming the notch 23a, the spacer 23 has a horizontal plane 23b (a plane intersecting the axis X direction) orthogonal to the axis X. In addition, the notch part 23a is not restricted to the case where it forms in multiple numbers spaced apart in the circumferential direction (refer FIG. 3), You may form continuously in the circumferential direction.

  The protruding portion 33 a that is the upper end portion of the cooling plate 33 is fixed to the spacer 23 by the fixing portion 40. As shown in FIG. 3, a plurality of fixing portions 40 are provided in a substantially half-circumferential portion in the circumferential direction, and each fixing portion 40 is disposed in the cutout portion 23 a. The fixing portion 40 includes a plate-like connecting member 42 joined to the inner surface of the protruding portion 33 a and a bolt 41 that fixes the connecting member 42 to the spacer 23. The connection member 42 has thermal conductivity like the spacer 23 and is made of, for example, copper. The bolt 41 is screwed into the spacer 23 along the axis X direction.

  Furthermore, the inner surface of the protrusion 33a of the cooling plate 33 and the outer periphery of the connection member 42 may be joined by soldering. That is, a solder joint E may be formed between the protrusion 33a and the connection member 42. In this way, the protruding portion 33a is fixed from the direction of the axis X by the fixing portion 40. In addition, although illustration is abbreviate | omitted, also in the 3rd coil part C, an insulating material is provided between the winding frame 17 and the superconducting coil 13. FIG. An insulating material is also provided between the superconducting coil 13 and the cooling plate 33.

  Further, as shown in FIGS. 1 and 2, a cooling plate 46 that thermally connects the outer peripheral portion of the superconducting coil 14 and the flange 20 is provided. The lower end portion of the cooling plate 46 is in contact with the spacer 26, and the upper end portion of the cooling plate 46 is in contact with the flange 20. The cooling plate 46 is attached to the fourth coil part D via a bracket 47.

  According to the superconducting magnet device 1, the thermally conductive spacers 21, 22, and 23 are provided between the flange 20 and the superconducting coils 11, 12, and 13. By providing the spacers 21, 22, and 23, each of the superconducting coils 11, 12, and 13 is positioned in the axis X direction. Therefore, the movements (for example, shake and shake) of the superconducting coils 11, 12, 13 in the direction of the axis X are restricted, and stable operation is possible. In addition, the spacers 21, 22, 23 have heat conductivity, and are thermally connected to the superconducting coils 11, 12, 13 by the cooling plates 31, 32, 33. Therefore, the superconducting coils 11, 12, 13 are cooled by the GM refrigerator 6 using the flange 20 having heat conductivity, the spacers 21, 22, 23 and the cooling plates 31, 32, 33 as cooling paths. Therefore, sufficient cooling efficiency can be obtained. Thus, the spacers 21, 22, 23 having the function of positioning the superconducting coils 11, 12, 13 and the function of forming a cooling path to the superconducting coils 11, 12, 13 provide high cooling efficiency and Both high operational stability is achieved.

  Further, since the protruding portions 31a, 32a, 33a of the cooling plates 31, 32, 33 are in contact with the spacers 21, 22, 23, the cooling plates 31, 32, 33 are in contact with the spacers 21, 22, 23. The range can be increased and the cooling efficiency can be improved.

  Moreover, the notch part 23a is formed in the spacer 23, and the protrusion part 33a is fixed by the fixing | fixed part 40 arrange | positioned at this notch part 23a. Therefore, even if the space between the flange 20 and the superconducting coil superconducting coil 13 is limited, the protruding portion 33a can be fixed without hindrance.

  In particular, when there is a step between the third coil part C and the fourth coil part D, and only the winding frame 18 of the fourth coil part D exists above the outer peripheral part of the third coil part C, the spacer It is effective to form the notch portion 23 a in 23. That is, if the reel 18 is scraped, the stress is locally increased by the electromagnetic force, and the coil may be damaged. By scraping the spacer 23, it is not necessary to scrape the winding frame 18, and the risk of damage to the fourth coil portion D is avoided.

  Further, since the spacer 22 and the winding frame 18 extend in a direction perpendicular to the axis X direction, it is difficult to fix by the fixing portion, but since the fixing by the fixing portion 40 is performed from the axis X direction, the protruding portion 33a. Can be easily fixed.

  The protruding portion 33 a is fixed by the bolt 41 through the connection member 42. Therefore, even when the cooling plate 33, that is, the protruding portion 33a has a thin plate shape, the connecting member 42 can be provided with strength, and the protruding portion 33a can be securely fixed.

  Moreover, since the solder joint part E is formed by soldering between the protrusion part 33a and the connection member 42, the solder joint part E contributes to heat transfer and the cooling efficiency is improved.

  Further, since the cooling plate 46 that thermally connects the outer peripheral portion of the superconducting coil 14 and the flange 20 is provided, the cooling efficiency is further improved. In addition, a cooling path from each superconducting coil 11, 12, 13, 14 through the spacer 26 is formed by the lower end of the cooling plate 46 contacting the lower spacer 26.

  Further, on both sides of the first coil part A, the second coil part B, the third coil part C, and the fourth coil part D in the axis X direction, flanges 20, spacers 21, 22, 23, and a spacer 26 are provided. Since they are arranged, the superconducting coils 11, 12, 13, and 14 are more reliably positioned. With this configuration, the anti-shake effect is enhanced.

  In order to confirm the effect of this embodiment, thermal analysis was performed on the third coil portion C. An example in which the notch 23a is formed in the spacer 23 and the cooling plate 33 is fixed by the fixing part 40 arranged in the notch 23a, and the cooling plate 33 terminates at the position of the upper end of the superconducting coil 13. Comparative studies were conducted on the comparative examples. As a result, in the example, the outer peripheral temperature of the superconducting coil 13 was 4.92K, while in the comparative example, the outer peripheral temperature of the superconducting coil 13 was 5.17K. Thus, in the thermal analysis, it was confirmed that the configuration of the present embodiment has a cooling effect of 0.25K. Note that the temperature measurement position in the example and the comparative example is the central portion in the axis X direction of the outer peripheral portion of the superconducting coil 13.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment .

  In the first coil portion A and the second coil portion B, similarly to the third coil portion C, notches may be formed in the spacers 21 and 22 and the fixing by the fixing portion may be performed. The bolt 41 may be fixed along the radial direction without being limited to the case where the bolt 41 is fixed along the axis X direction. That is, the protruding portion may be fixed by the fixing portion from the radially outer side toward the radially inner side.

  It is not limited to the case where the connecting member is joined to the heat transfer member, and the protruding portion may be disposed in the notch by bending the protruding portion or the like. In this case, the connecting member can be omitted and the protruding portion can be directly fixed to the spacer.

  The lower ends of the cooling plates 31, 32 and 33 may be brought into contact with the spacer 26. The spacers 26 may be separated from the superconducting coils 11, 12, 13, and 14. In this case, the spacer 26 can be an annular block body arranged in a multiple manner in the radial direction, like the spacers 21, 22, and 23. The spacer 26 may be omitted.

  The superconducting coil is not limited to having a winding frame, and may be an air-core coil. In this case, only the cylindrical part of the winding frame may be removed, or the cylindrical part and the flange part may be removed.

  The GM refrigerator (cooling means) may be provided not only on one side of the superconducting coils 11, 12, 13, and 14 in the axis X direction, but may be provided on both sides. In this case, a thermally conductive flange is provided on the other side (the lower side in FIG. 1) of the superconducting coils 11, 12, 13, and 14.

  DESCRIPTION OF SYMBOLS 1 ... Superconducting magnet apparatus, 6 ... GM refrigerator (cooling means), 11, 12, 13, 14 ... Superconducting coil, 20 ... Flange (plate-shaped part), 21, 22, 23, 24 ... Spacer (positioning part), 23a ... Notch, 31, 32, 33 ... Cooling plate (heat transfer member), 31a, 32a, 33a ... Projection, 40 ... Fixing part, 41 ... Bolt, 42 ... Connection member, X ... Axis.

Claims (4)

A plurality of superconducting coils arranged concentrically about an axis and having different lengths in the axial direction;
A thermally conductive plate-like portion disposed on one side of the superconducting coil in the axial direction and cooled by cooling means;
A thermally conductive positioning portion that is provided between the plate-like portion and the superconducting coil to form a block, and positions each of the superconducting coils in the axial direction;
A heat transfer member that thermally connects an outer peripheral portion and the positioning portion in at least one of the superconducting coils, and has a protruding portion that protrudes from the superconducting coil in the axial direction and contacts the positioning portion. A thermal member;
A notch formed in the positioning portion so as to face the protruding portion;
A fixing portion that is disposed in the notch portion and fixes the protruding portion to the positioning portion;
The positioning unit is a superconducting magnet device that is arranged without a gap between the plate-like unit and each of the superconducting coils. A plurality of superconducting coils arranged concentrically about the axis;
A thermally conductive plate-like portion disposed on one side of the superconducting coil in the axial direction and cooled by cooling means;
A thermally conductive positioning portion that is provided between the plate-like portion and the superconducting coil to form a block, and positions each of the superconducting coils in the axial direction;
A heat transfer member that thermally connects an outer peripheral portion and the positioning portion in at least one of the superconducting coils, and has a protruding portion that protrudes from the superconducting coil in the axial direction and contacts the positioning portion. A thermal member;
A notch formed in the positioning portion so as to face the protruding portion;
A superconducting magnet device, comprising: a fixing portion that is disposed in the notch portion and fixes the protruding portion to the positioning portion. The projecting portion, the fixed from the axial direction by the fixing portion, the superconducting magnet apparatus according to claim 1 or 2 wherein. The fixing part is
A connecting member joined to the protruding portion;
The superconducting magnet device according to claim 1, further comprising: a bolt that fixes the connection member to the positioning portion.

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