Superconducting wire connecting case and superconducting magnet

Abstract

To prevent the floating of the filament of a superconducting material and to enhance the cooling effect of a container when the container for connecting a superconducting wire is formed.SOLUTION: A container for connecting a superconducting wire includes a superconducting wire having a superconducting raw material, a superconducting material used for electrically joining two or more superconducting wires, and a container having an outer wall holding the superconducting material and the superconducting wire and having a recess and / or a projection, and a bottom plate.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The embodiments disclosed in this specification and the drawings relate to a superconducting wire splicing container and a superconducting magnet. [Background technology]

[0002] MRI (Magnetic Resonance Imaging) devices sometimes use superconducting magnets that use superconductors. To create a superconducting magnet, it is important to connect superconducting wires. When connecting superconducting wires, it is important to minimize power loss.

[0003] Here, in connecting superconducting wires, there is a method in which the superconducting wires are soldered using a superconducting solder that exhibits superconductivity at low temperatures, the soldered superconducting wires are enclosed in a container to create a superconducting wire connection container, and the superconducting wires are connected using the created superconducting wire connection container.

[0004] However, when producing a superconducting wire connection container, the superconducting filaments may float and come into contact with the air on the surface, oxidizing and becoming an insulator, which can degrade the connection characteristics of the superconducting wire. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] U.S. Patent No. 4,744,506 Summary of the Invention [Problem to be solved by the invention]

[0006] One of the problems to be solved by the embodiments disclosed in this specification and the drawings is to create a superconducting wire connection container for connecting superconducting wires while suppressing power loss. However, the problems to be solved by the embodiments disclosed in this specification and the drawings are not limited to the above problem. Problems corresponding to the effects of each configuration shown in the embodiments described below can also be positioned as other problems. [Means for solving the problem]

[0007] A superconducting wire connection container according to an embodiment includes a superconducting wire having a superconducting material, a superconducting material used to electrically join two or more of the superconducting wires, and a container having an outer wall that holds the superconducting material and the superconducting wires, the outer wall having a recess and / or a protrusion, and a bottom plate. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating an example of a procedure for producing a superconducting wire connection container. [Figure 2] FIG. 2 is a diagram illustrating an example of a procedure for producing a superconducting wire connection container. [Figure 3] FIG. 3 is a diagram illustrating the appearance of a superconducting wire connection container according to a comparative example. [Figure 4] FIG. 4 is a cross-sectional view illustrating the configuration of a superconducting wire connection container according to a comparative example. [Figure 5] FIG. 5 is a diagram illustrating the appearance of a superconducting wire connection container according to a comparative example. [Figure 6] FIG. 6 is a cross-sectional view illustrating the configuration of a superconducting wire connection container according to a comparative example. [Figure 7] FIG. 7 is a cross-sectional view illustrating an example of the configuration of the superconducting wire connection container according to the first embodiment. [Figure 8] FIG. 8 is a cross-sectional view illustrating an example of the configuration of the superconducting wire connection container according to the first embodiment. [Figure 9]FIG. 9 is a cross-sectional view illustrating another example of the configuration of the superconducting wire connection container according to the first embodiment. [Figure 10] FIG. 10 is a cross-sectional view illustrating another example of the configuration of the superconducting wire connection container according to the first embodiment. [Figure 11] FIG. 11 is a diagram illustrating another example of the configuration of the superconducting wire connection container according to the first embodiment. [Figure 12] FIG. 12 is a cross-sectional view illustrating an example of the configuration of a superconducting wire connection container according to the second embodiment. [Figure 13] FIG. 13 is a cross-sectional view illustrating another example of the configuration of the superconducting wire connection container according to the second embodiment. [Figure 14] FIG. 14 is a cross-sectional view illustrating another example of the configuration of the superconducting wire connection container according to the second embodiment. [Figure 15] FIG. 15 is a diagram illustrating another example of the configuration of the superconducting wire connection container according to the second embodiment. [Figure 16] FIG. 16 is a cross-sectional view illustrating another example of the configuration of the superconducting wire connection container according to the second embodiment. [Figure 17] FIG. 17 is a diagram illustrating another example of the configuration of the superconducting wire connection container according to the second embodiment. [Figure 18] FIG. 18 is a cross-sectional view illustrating another example of the configuration of the superconducting wire connection container according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] (First embodiment) Hereinafter, embodiments of a superconducting wire (superconducting wire) connection container and a superconducting (superconducting) magnet will be described in detail with reference to the drawings. Note that in the embodiments, superconductivity and superconductivity are synonymous.

[0010] First, we will explain the connection of superconducting wires. For example, MRI (Magnetic Resonance Imaging) devices use superconducting magnets made of superconductors, and the connection between superconducting wires is important for creating superelectromagnets. When connecting superconducting wires, it is important to suppress power loss.

[0011] Here, one possible method for connecting superconducting wires is to solder them together using superconducting solder that exhibits superconductivity at low temperatures, and then enclose the soldered superconducting wire in a container to form a superconducting wire connection container. By connecting superconducting wires through this superconducting wire connection container, it is possible to create a superconducting magnet for, for example, an MRI.

[0012] Examples of procedures for producing a superconducting wire connection container are shown in Figures 1 and 2. Figure 1 shows an example of producing a superconducting wire connection container by a method in which a superconducting wire is immersed in concentrated nitric acid and then soldered to the filament, while Figure 2 shows an example of producing a superconducting wire connection container by a method in which a superconducting wire is tin-substituted and then soldered.

[0013] 1 shows an example of producing a superconducting wire connection container by a method of soldering a superconducting wire to a filament after immersing the wire in concentrated nitric acid. First, in step S1, a superconducting wire 9 typically includes a base material 1 containing copper or a copper compound, and a superconducting material 2 provided inside the base material 1. Examples of the superconducting material 2 include NbTi and Nb3Sn. When the superconducting wire 9 is immersed in concentrated nitric acid 10, the base material 1 made of copper or a copper compound dissolves, exposing the internal superconducting material 2 and forming a filament shape.

[0014] Subsequently, in step S2, an operation is performed to twist together the two filaments with the exposed portions of the superconducting material 2. Specifically, the filament-shaped superconducting material 2a in the superconducting wire 9a made of the base material 1a and the superconducting material 2a and the filament-shaped superconducting material 2b in the superconducting wire 9b made of the base material 1b and the superconducting material 2b are twisted together, thereby connecting the superconducting wire 9a and the superconducting wire 9b.

[0015] Subsequently, in step S3, the superconducting wire 9a and the superconducting wire 9b are placed in the container 3. The container 3 is typically made of a conductive material such as copper.

[0016] Subsequently, in step S4, two or more superconducting wires, i.e., superconducting wire 9a and superconducting wire 9b, are electrically joined by superconducting material 4. Superconducting material 4 is, for example, solder that exhibits superconductivity at low temperatures. As an example, superconducting wire 9a and superconducting wire 9b are soldered together by solder as superconducting material 4 that is in a liquid state at high temperatures (exhibiting a superconducting state at low temperatures), and superconducting material 4 solidifies at low temperatures, thereby electrically joining superconducting wire 9a and superconducting wire 9b by superconducting material 4. Since superconducting material 4 enters a superconducting state at low temperatures after further cooling, such as to the temperature of liquid helium, the electrical resistance at the connection between superconducting wire 9a and superconducting wire 9b becomes zero, thereby suppressing power loss.

[0017] FIG. 2 shows an example of producing a superconducting wire connection container by a method of soldering a filament after tin-substitution of a superconducting wire 9. First, in step S1, the superconducting wire 9 typically includes a base material 1 containing copper or a copper compound, and a superconducting material provided inside the base material 1. Examples of the superconducting material include NbTi and Nb3Sn. When the superconducting wire 9 is immersed in molten tin 11, as in step S2, the base material 1 made of copper or a copper compound dissolves and the superconducting material 2 is exposed. At this time, the surface of the superconducting material 2 is coated with tin, thereby providing tin plating. This operation is performed for each of the two superconducting wires.

[0018] Subsequently, in step S3, the tin-plated superconducting wire 9a and the superconducting wire 9b are placed in the container 3. The container 3 is typically made of a conductive material such as copper.

[0019] Subsequently, in step S4, two or more superconducting wires, i.e., superconducting wire 9a and superconducting wire 9b, are electrically joined by superconducting material 4. Specifically, superconducting material 4 is, for example, solder that exhibits superconductivity at low temperatures. As an example, superconducting wire 9a and superconducting wire 9b are soldered together by solder as superconducting material 4 that becomes liquid at high temperatures (exhibiting a superconducting state at low temperatures), and superconducting material 4 solidifies at low temperatures, thereby electrically joining superconducting wire 9a and superconducting wire 9b by superconducting material 4. Since superconducting material 4 becomes superconducting at low temperatures after further cooling, such as to the temperature of liquid helium, the electrical resistance at the connection between superconducting wire 9a and superconducting wire 9b becomes zero, thereby suppressing power loss.

[0020] As described above, as a method for producing a superconducting wire connection container for connecting superconducting wires, a case where a superconducting wire connection container is produced by a method of soldering a filament after immersing it in concentrated nitric acid, and a case where a superconducting wire connection container is produced by a method of soldering a superconducting wire after tin substitution have been described. However, the embodiments are not limited to these, and in the embodiments, superconducting wire connection may be performed by crimping bonding, solid-state bonding, or the like.

[0021] Here, crimping refers to a method of joining multiple superconducting wires by crimping. In the case of crimping, first, the processes of steps S1 and S2 in FIG. 1 are performed in the same manner. In the case of crimping, in step S3, superconducting wire 9a and superconducting wire 9b are inserted into a metal sleeve. In step S4, pressure is applied to the metal sleeve, and superconducting wire 9a and superconducting wire 9b are crimped and joined. Finally, the vicinity of the entrance of the metal sleeve is soldered.

[0022] 1 is also performed in the case of solid-state bonding. In the case of solid-state bonding, the superconducting wire 9a and the superconducting wire 9b are inserted into a compression jig in step S3. In step S4, the compression jig is pressurized and heated, and the superconducting wire 9a and the superconducting wire 9b are solid-state bonded.

[0023] The configuration of the superconducting wire splicing container will be described more specifically with reference to Fig. 3 and Fig. 4. Fig. 3 is an external view of a superconducting wire splicing container according to a comparative example, and Fig. 4 is a cross-sectional view of the superconducting wire splicing container according to the comparative example.

[0024] As shown in FIGS. 3 and 4 , the superconducting wire splicing container according to the comparative example includes superconducting wires 9a and 9b having superconducting materials 2a and 2b, a superconducting material 4 used to electrically join the two or more superconducting wires 9a and 9b, and a container 3 having an outer wall 21 and a bottom plate 22 for holding the superconducting material 4 and the superconducting wires 9a and 9b. Here, the superconducting wires 9a and 9b include base materials 1a and 1b containing copper or a copper compound, and superconducting materials 2a and 2b provided inside the base materials 1a and 1b. The superconducting material 4 is, for example, a solder that exhibits superconductivity at low temperatures. The superconducting wire splicing container according to the embodiment is used to splice superconducting wires included in the superconducting coil of a superconducting magnet, for example.

[0025] In order to control void formation during solidification and cooling of the solder and to improve the cooling efficiency of the container, the container 3 may have a cavity 5 as shown in Figures 5 and 6. Figure 5 is an external view of a superconducting wire splicing container according to a comparative example in which the container 3 has the cavity 5, and Figure 6 is a cross-sectional view of the superconducting wire splicing container according to the comparative example in which the container 3 has the cavity 5.

[0026] 5 and 6, a superconducting wire splicing container according to a comparative example includes superconducting wires 9a and 9b having superconducting materials 2a and 2b, a superconducting material 4 used to electrically join the two or more superconducting wires 9a and 9b, and a container 3 having an outer wall 21 and a bottom plate 22 for holding the superconducting material 4 and the superconducting wires 9a and 9b. As in the cases of FIGS. 3 and 4, the superconducting wires 9a and 9b include base materials 1a and 1b containing copper or a copper compound, and superconducting materials 2a and 2b provided inside the base materials 1a and 1b. The superconducting material 4 is, for example, a solder that exhibits superconductivity at low temperatures.

[0027] Here, a cavity 5 is provided from the bottom plate portion of the container 3, and the container 3 has an inner wall 31 at least partly integrated with the bottom plate 22. The inner wall 31 may be made of a conductive material to enhance thermal conductivity.

[0028] Here, by providing the cavity 5 from the bottom plate portion of the vessel 3, a difference in cooling rate occurs between the inner wall 31 and the outer wall 21, making it possible to control the occurrence of voids. In addition, by providing the cavity, the vessel 3 can be cooled efficiently when it is incorporated and operated as part of a superconducting magnet, for example.

[0029] Next, the background of the embodiment will be described.

[0030] When a container for connecting superconducting wires is produced, superconducting solder that becomes superconductive at low temperatures is filled into the container 3 as the superconducting material 4, but before the superconducting material 4 is cooled and solidified, the superconducting material 4 is in a liquid metal state. Therefore, the filaments of the superconducting material 2 may float and come into contact with air on the surface of the superconducting material 4, causing oxidation and turning into an insulator. If the filaments of the superconducting material 2 come into contact with air and oxidize, turning into an insulator, electrical resistance will occur, deteriorating the connection characteristics of the superconducting wire.

[0031] In view of this background, the superconducting wire connection container according to the embodiment includes, as shown in FIG. 7 for example, superconducting wires 9a, 9b having a superconducting material 2, a superconducting material 4 used to electrically join two or more superconducting wires 9a, 9b, and a container 3 having an outer wall 21 that holds the superconducting material 4 and the superconducting wires 9a, 9b, the outer wall 21 having recesses and / or protrusions 6, and a bottom plate 22.

[0032] Here, FIG. 7 shows a case where the recessed portion and / or protruding portion 6 is a protruding portion. In this case, the presence of the recessed portion and / or protruding portion 6 on the outer wall 21 causes the filament portion of the superconducting material 2 to mechanically contact and get caught on the recessed portion and / or protruding portion 6. This prevents the superconducting material 2 from floating up to the surface 40 and reacting with oxygen in the air to be oxidized. This prevents the connection characteristics of the superconducting wire from deteriorating. In other words, the recessed portion and / or protruding portion 6 mechanically hold down the superconducting material 2, thereby preventing the superconducting material 2 from floating up inside the container 3 when two or more superconducting materials 2a, 2b are electrically joined using the superconducting material 4.

[0033] In addition, since the recessed and / or protruding portions 6 protrude from the outer wall 21, the cooling efficiency of the container 3 can be improved.

[0034] The recessed and / or protruding portions 6 in the embodiment may be formed as recessed portions as shown in Fig. 8. In this case, the container 3 includes superconducting wires 9a, 9b having a superconducting material 2, a superconducting material 4 used to electrically join two or more superconducting wires 9a, 9b, and an outer wall 21 for holding the superconducting material 4 and the superconducting wires 9a, 9b, the outer wall 21 having the recessed and / or protruding portions 6, and a bottom plate 22.

[0035] 8, the recessed and / or protruding portions 6 are recessed portions, and the filament portions of the superconducting material 2 come into mechanical contact with and become caught in the hollow portions of the recessed and / or protruding portions 6. This prevents the superconducting material 2 from floating up to the surface and reacting with oxygen in the air to be oxidized. This prevents the connection characteristics of the superconducting wire from deteriorating.

[0036] In addition, the recessed and / or protruding portions 6 have a larger contact area with the superconducting material 4, and therefore the cooling efficiency of the container 3 can be improved.

[0037] FIG. 9 shows another example of the recessed and / or protruding portions 6. FIG. 9 illustrates an example in which the container 3 has a structure similar to that of FIG. 6 , in which the container 3 has an outer wall 21, a bottom plate 22, and an inner wall 31. The container 3 has a shape that is approximately symmetrical about a central axis and has a cavity 5 inside. The structure of a portion of such a container 3 is shown in FIG. 9. The superconducting material 2 is wound, for example, along the inner or outer wall of the container 3. Here, the recessed and / or protruding portions 6 on the outer wall 21 have a bellows structure and a shape consisting of multiple circular arcs 6x, 6y, and 6z. The recessed and / or protruding portions 6 prevent the superconducting material 2 from floating up inside the container 3 by mechanically contacting the superconducting material 2, and also ensure efficient cooling of the container 3 by maintaining a large surface area in contact with the superconducting material 4.

[0038] As another example, a cooling section that cools the container 3 through the outer wall 21 may be provided in the recessed and / or protruding portions 6. FIG. 10 shows an example of such a structure. In FIG. 10, the outer wall 21 of the container 3 has recessed and / or protruding portions 6 with a bellows structure. The container 3 comprises an adhesive layer 7 in contact with the outer wall 21 having the recessed and / or protruding portions 6, and a metal member 8 in contact with the adhesive layer 7. Here, the cooling section comprises the adhesive layer 7 in contact with the outer wall 21 having the recessed and / or protruding portions 6, and the metal member 8 in contact with the adhesive layer 7. The recessed and / or protruding portions 6 are shaped to accommodate the member to be cooled, thereby increasing the contact area between the superconducting material 4 and the cooling section. The adhesive layer 7 may be made of a metal such as indium, aluminum, solder, or an alloy used in welding rods, or a resin such as epoxy or silicone.

[0039] As another example of the cooling unit, the cooling unit may be a heat transfer material using a thermosiphon or heat pipe system. By using a heat transfer material using a thermosiphon or heat pipe system, the cooling efficiency of the container 3 can be further improved. Such an example is shown in FIG. 11.

[0040] 11, adhesive layer 7 is in contact with recessed and / or protruding portions 6 of outer wall 21, and a thermosiphon, which is cooling member 70, is arranged in contact with adhesive layer 7 and metal member 8. Recessed and / or protruding portions 6 form a gentle arc, preventing superconducting material 2 from floating up inside container 3 and enabling superconducting material 4 in contact with recessed and / or protruding portions 6 to be rapidly cooled through thermosiphon, which is cooling member 70.

[0041] The embodiment is not limited to the above-described example. In the above-described example, the recessed portion and / or protruding portion 6 is provided on the outer wall 21, but the location where the recessed portion and / or protruding portion 6 is provided is not limited to this. For example, the recessed portion and / or protruding portion 6 may be provided on the inner wall 31 or the bottom plate 22. Furthermore, the recessed portion and / or protruding portion 6 may be provided in two or more locations among the outer wall 21, the inner wall 31, and the bottom plate 22.

[0042] Furthermore, the shape of the recessed and / or protruding portions 6 is not limited to the examples given above, and may be various shapes such as round, oval, square, polygonal, etc. Furthermore, the recessed and / or protruding portions 6 may be, for example, cone-shaped (circular cone-like), so that the superconducting material 2 is less likely to get caught when being put into the container 3.

[0043] The recesses and / or protrusions 6 are not limited to being arranged symmetrically, but may be arranged asymmetrically. The shapes of the recesses and / or protrusions 6 may vary depending on the location, and may have different diameters, side lengths, areas, etc.

[0044] Furthermore, the material of the cooling portion is not limited to the above-mentioned examples, and the cooling portion may be made of, for example, copper, aluminum, SUS, ceramic, resin, polyimide, plastic material, or a refrigerant.

[0045] As described above, in the first embodiment, the outer wall 21 of the vessel 3 is provided with the recessed and / or protruding portions 6. This makes it possible to prevent the superconducting material 2 from floating up and coming into contact with the atmosphere and being oxidized due to mechanical contact between the recessed and / or protruding portions 6 and the filament portion of the superconducting material 2, and also contributes to efficient cooling of the vessel 3 by maintaining a large contact area between the superconducting material 4 and the cooling portion.

[0046] (Second embodiment) The embodiments are not limited to the above-described embodiments. As an example, the recessed portion and / or the protruding portion 6 may be a rod-shaped member. For example, as shown in FIG. 12 , in a second embodiment, a rod-shaped member 60 serves as the recessed portion and / or the protruding portion 6, and acts as a drop lid, preventing the superconducting material 2 from floating by mechanically contacting the filament portion of the superconducting material 2. Furthermore, the rod-shaped member 60 contributes to efficient cooling of the container 3 by maintaining a large contact area with the superconducting material 4.

[0047] Furthermore, the shape of the rod-shaped member is not limited to the above example, and for example, as shown in Fig. 13, the recessed portion and / or protruding portion 6 may be a rod-shaped member 63 having a U-shape. The rod-shaped member 63 having a U-shape is arranged in the container 3 so as to be hooked onto the container 3, thereby preventing the superconducting material 2 from floating up.

[0048] Furthermore, a fixing portion for fixing the rod-shaped member may be further provided. An example of the fixing portion is mechanical fixing using bolts, etc. As an example, as shown in Fig. 14, a bolt 67 for fixing a rod-shaped member 65 as the recess and / or protrusion 6 may be provided as the fixing portion.

[0049] Furthermore, in the above-described embodiment, the case where the container 3 is a cylindrical container has been described, but the embodiment is not limited to this. That is, the container 3 may be a prismatic container. An example of such an embodiment is shown in Fig. 15 and Fig. 16. Fig. 15 is an external view of a superconducting wire splicing container in which the container 3 is a prismatic container, and Fig. 16 is a cross-sectional view.

[0050] 15 and 16, a superconducting wire splicing container according to an embodiment includes superconducting wires 9a, 9b having superconducting materials 2a, 2b, a superconducting material 4 used to electrically join the two or more superconducting wires 9a, 9b, and a container 3 having outer walls 21a, 21b and a bottom plate 22 for holding the superconducting material 4 and the superconducting wires 9a, 9b. In FIG. 15, the outer wall 21a has a protrusion 68, and the outer wall 21b has a protrusion 69. The protrusion 68 is made of, for example, a thermosiphon, and the protrusion 69 is a cooling part made of copper, aluminum, SUS, ceramic, resin, polyimide, plastic, a refrigerant, or the like.

[0051] At this time, the protrusions 68 and 69 come into mechanical contact with the filament portions of the superconducting materials 2a and 2b, thereby preventing the superconducting materials 2a and 2b from floating up and coming into contact with the atmosphere and being oxidized, and the protrusions 68 and 69 maintain a large contact area with the superconducting material 4 and the cooling member, thereby contributing to efficient cooling of the vessel 3. In this way, even when the vessel 3 is a rectangular vessel, by devising the shape of the protrusions, it is possible to prevent the wire from floating up and maintain the contact area between the protrusions and the external cooling member.

[0052] Another example of the embodiment is shown in Figures 17 and 18. The method of connecting superconducting wires is not limited to soldering, and they may be connected using solid-state bonding or pressure bonding, for example. Figures 17 and 18 show such an example. Figure 17 is a diagram showing an external view, and Figure 18 is a diagram showing a cross-sectional view.

[0053] 17 and 18, a superconducting wire splicing container according to an embodiment includes superconducting wires 9a and 9b having superconducting materials 2a and 2b, a superconducting material 4 used to electrically join the two or more superconducting wires 9a and 9b, and a container 3 having outer walls 21a and 21b and a bottom plate 22 for holding the superconducting material 4 and the superconducting wires 9a and 9b. As shown in FIG. 17, the convex portion 6a of the outer wall 21a includes a cooling member 70, the convex portion 6b of the outer wall 21b includes a cooling member 71, and the convex portion 6c of the outer wall 21b includes a cooling member 72. The cooling members 70, 71, and 72 may have various shapes, such as a circle, an ellipse, a rectangle, or a polygon, in addition to the shapes shown in the figures. Furthermore, a plurality of convex portions 6b and 6c may be arranged to prevent the superconducting materials 2a and 2b from floating up.

[0054] At this time, the protrusions 6a of the outer wall 21a and the protrusions 6b, 6c of the outer wall 21b come into mechanical contact with the filament portions of the superconducting materials 2a, 2b, thereby preventing the superconducting materials 2a, 2b from floating up and coming into contact with the atmosphere and being oxidized, and these protrusions 6a, 6b, 6c maintain a large contact area with the cooling members 70, 71, and 72, respectively, thereby contributing to efficient cooling of the container 3.

[0055] According to at least one of the embodiments described above, when producing a superconducting wire connection container, it is possible to prevent the filaments of the superconducting material from floating, and also to enhance the cooling effect of the container.

[0056] Although several embodiments have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, modifications, and combinations of embodiments can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0057] 1 Base material 2. Superconducting materials 3 containers 4. Superconducting materials 5 cavities 6 Convex part 9 Superconducting wire 21 Exterior Wall 22 Bottom plate 31 Inner wall

Claims

1. a superconducting wire having a superconducting material; a superconducting material used to electrically join two or more of the superconducting wires; a container having an outer wall that holds the superconducting material and the superconducting wire, the outer wall having a recess and / or a protrusion, and a bottom plate; A container for connecting superconducting wires.

2. 2. The superconducting wire connection container according to claim 1, wherein the recessed and / or protruding portions mechanically hold down the superconducting wire, thereby preventing the superconducting wire from floating up in the container when the two or more superconducting wires are electrically joined using the superconducting material.

3. 2. The superconducting wire connection container according to claim 1, wherein a cooling section for cooling said container through said outer wall is provided in said recessed portion and / or said protruding portion.

4. 4. The superconducting wire splicing container according to claim 3, wherein said cooling section is a heat transfer body for cooling using a thermosiphon or a heat pipe system.

5. 4. The superconducting wire connection container according to claim 3, wherein said cooling part comprises an adhesive layer in contact with said outer wall and a metal member in contact with said adhesive layer.

6. 6. The superconducting wire connection container according to claim 5, wherein said adhesive layer is made of metal or resin.

7. 4. The superconducting wire connection container according to claim 3, wherein said convex portion has a shape that increases the contact area with said cooling portion.

8. 4. The superconducting wire splicing container according to claim 3, wherein said cooling portion is made of copper, aluminum, SUS, ceramic, resin, polyimide, plastic material or a refrigerant.

9. 2. The superconducting wire connection container according to claim 1, wherein said protrusion is a rod-shaped member.

10. 10. The superconducting wire connection container according to claim 9, further comprising a fixing portion for fixing said member.

11. 2. The superconducting wire connection container according to claim 1, wherein the recessed portion and / or the protruding portion has a bellows structure.

12. 2. The superconducting wire connection container according to claim 1, wherein said recessed portion and / or said protruding portion has a shape consisting of a circular arc.

13. 2. The superconducting wire splicing container according to claim 1, wherein said container is a rectangular container.

14. the superconducting wire includes a base material containing copper or a copper compound, and the superconducting material provided inside the base material, 2. The superconducting wire connection container according to claim 1, wherein said superconducting material is a solder that exhibits superconductivity at low temperatures.

15. 2. A superconducting magnet in which superconducting wires contained in a superconducting coil are connected using the superconducting wire connecting container according to claim 1.

Images