JP4906182B2 - Conduit type forced cooling superconducting conductor and superconducting magnet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a forced cooling superconducting conductor, particularly a conduit-type forced cooling superconducting conductor used in a large-capacity superconducting coil used for component analysis using high magnetic fields, for energy storage, and for induction capacitors such as transformers and inductors. The present invention relates to a superconducting magnet using this.
[0002]
[Prior art]
In recent years, with the improvement of the refrigeration capacity of refrigerators, the development of superconducting magnet devices using a superconducting coil attached to a superconducting coil and cooling the superconducting coil with a cryogenic refrigerant generated in the refrigerator has been actively promoted. .
[0003]
FIG. 7 is a cross-sectional view schematically showing a basic configuration of a conventional refrigerator-cooled superconducting magnet device, and shows a cross section passing through the central axis of a superconducting magnet device having a high-temperature space at room temperature at the center. It is. In FIG. 7, 1 is a superconducting coil formed by winding a superconducting wire in a solenoid shape, 2 is arranged around the superconducting coil 1, and a radiation shield that shields and insulates heat radiation from the outside. It is a vacuum vessel that keeps the inside of the enclosure in a vacuum to insulate it. Reference numeral 7 denotes a refrigerator that cools the superconducting coil 1, 8 a compressor that supplies compressed helium gas to the refrigerator 7 and includes an operation control system for the refrigeration cycle, and 9 supplies current to the superconducting coil 1 from a power source (not shown). Current leads to be excited.
[0004]
As shown in FIG. 7, the refrigerator 7 is connected to one cooling flange 4 and the radiation shield 2 that support the superconducting coil 1 wound in layers on a cooling bobbin 5 as a winding frame from the side, The superconducting coil 1 is cooled to a predetermined cryogenic temperature (about 20 to 80 K), and the radiation shield 2 is cooled to a predetermined cryogenic temperature (about 80 to 100 K).
[0005]
By the way, when the superconducting coil 1 receives a fluctuating magnetic field and is operated so as to generate AC loss, AC loss is generated inside the coil and heat is generated. If the coil temperature rises above the critical temperature due to this heat generation, the superconducting wire may transition from the superconducting state to the normal conducting state, causing a normal conducting transition (quenching), so it is necessary to remove this heat generation. .
[0006]
FIG. 8 shows a configuration example of a superconducting coil proposed in order to suppress the risk of such normal conducting dislocations. The superconducting coils described in Japanese Patent Laid-Open Nos. 10-116725 and 11-135318 are disclosed. It is sectional drawing. In this configuration, a highly heat conductive ceramic material which also serves as a heat conductive material such as copper or copper alloy or an interlayer insulation between layers of the superconducting wire 10 wound in layers on a cooling bobbin 5 as a winding frame. A heat conduction cooling plate 11 is incorporated, and both ends of the heat conduction cooling plate 11 are inserted into grooves provided in the cooling flange 4C and the cooling flange 4D. Therefore, according to this configuration, the inside of the superconducting coil is cooled to a predetermined temperature not higher than the critical current by heat transfer through the heat conduction cooling plate 11, so that it can be operated without causing normal conduction dislocation.
[0007]
However, even in the above configuration, when the superconducting coil is enlarged, the heat conduction cooling plate 11 becomes longer, and the temperature of the central part of the superconducting coil may be much higher than the temperature of the cooling flange. As a result, there is a possibility that a large AC loss occurs and the temperature rise cannot be suppressed.
Furthermore, in the case of a large superconducting coil, the electromagnetic force increases, and thus high strength is required. However, there is a possibility that a material having a low strength such as ceramics cannot be used for the heat conduction cooling plate. As a result, the temperature of the superconducting coil cannot be maintained at a predetermined temperature, and there is a possibility that stable operation cannot be performed.
[0008]
On the other hand, forced cooling superconducting conductors have been developed in recent years. Especially in superconducting coils or superconducting magnets that require large size, high magnetic field, and high precision, multiple superconducting stranded wires are built into the metal tube. A so-called conduit type forced cooling superconductor (hereinafter also referred to as a conduit superconductor) has been developed. The configuration of this conduit superconductor is described in, for example, JP-A-7-45137, JP-A-8-17264, and JP-A-11-329114.
[0009]
FIG. 9 shows an example of a schematic cross-sectional structure of the conduit superconductor described in Japanese Patent Laid-Open No. 7-45137. The conduit superconductor is formed by twisting superconducting wires wrapped in a stabilizing material. In addition, a primary stranded wire 14 formed by twisting a plurality of superconducting stranded wires 13 and a refrigerant 15 are built in a metal conduit 12 so that the refrigerant 15 can flow in the conduit 12. As a result, the stability against disturbances such as magnetic field fluctuations is improved compared to the prior art. Even in the above-mentioned JP-A-8-17264 and JP-A-11-329114, although different from the gist of the invention described in JP-A-7-45137, a superconducting stranded wire is used and the refrigerant flows in the conduit. A similar configuration that has been made possible is described.
[0010]
[Problems to be solved by the invention]
However, the conventional conduit superconductor configuration also has the following problems when the size of the superconducting coil is further increased.
[0011]
First, the first problem is that there is a risk that a superconducting conductor made of a superconducting stranded wire may move in a conduit due to an electromagnetic force that increases as the size of the conductor increases, resulting in a risk of causing a normal conducting transition (quenching). Get higher.
[0012]
The second problem of the conventional device is an increase in AC loss due to non-uniform current shunting. Even in the configuration using the conventional stranded wire, it is theoretically possible to make the current shunt uniform. However, since the superconducting strands are arranged inside and outside the circular cross section, However, it is practically difficult to twist the current shunt so that the current shunt becomes uniform, and the current shunting must be uniform.
[0013]
For this reason, in the high-capacity superconducting coil in which the AC loss is particularly large, if the above-described twisted conductor configuration is adopted, a circulating current flows due to non-uniform current shunting, and there is a problem that the AC loss further increases due to the drift. .
[0014]
The present invention has been made to solve the above-described problems. The object of the present invention is to provide a good support for a large electromagnetic force acting on a superconducting conductor and an AC loss even in a large coil. It is an object of the present invention to provide a conduit-type forced cooling superconducting conductor capable of effectively removing the accompanying heat generation and making the current shunt uniform, and a superconducting magnet using the same.
[0015]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a conduit-type forced cooling superconducting conductor having a plurality of superconducting conductors and a refrigerant flow path inside a conduit. A superconducting conductor assembly spirally wound in the longitudinal direction; at least one electromagnetic force support member disposed between the inner surface of the conduit and the outer surface of the superconducting conductor assembly; and the inner surface of the conduit and the superconducting conductor. A high-temperature superconducting conductor having a coolant flow path formed by the outer surface of the assembly and the outer surface of the electromagnetic force support member and having a rectangular cross-sectional shape is used as the superconducting conductor, and the superconducting conductor assembly has a uniform current distribution In order to reduce the number of superconducting conductors, the position of each superconducting conductor is changed and the position of each superconducting conductor is changed. It is allowed and shall such to (invention of claim 1).
[0016]
As described above, even when the superconducting coil is enlarged and the AC loss is increased, the superconducting conductor can be effectively cooled by supplying an appropriate amount of refrigerant into the conduit.
Further, the electromagnetic force acting on the superconducting conductor is transmitted to the conduit via the electromagnetic force supporting member, and can be suitably supported by using a high strength member for the conduit. Note that, from the viewpoint of improving the cooling efficiency, the molded tape is desirably wound spirally with a gap in the longitudinal direction of the conductor, or wound using a perforated tape.
[0017]
Further, in the invention described in claim 1, wherein the superconducting conductor assemblies, since it made by rearrangement multiple superconducting conductors for equalizing the current shunt, thereby, the superconducting conductor of a conventional twisted line structure Unlike the aggregate, the current shunt can be made more uniform. With regard to this dislocation, a structure has been proposed in which, when a parallel superconducting conductor is wound as a superconducting coil, a dislocation is performed at an interlayer connection portion or the like (for example, Japanese Patent Application Laid-Open No. 10-172824, Japanese Patent Application No. 11-78819). However, in the first aspect of the invention, the superconducting conductor assembly itself displaces the superconducting conductor to make the current distribution uniform, so that it is easy to form a large capacity coil.
[0018]
In JP-A-10-172824, as a dislocation configuration of a superconducting conductor suitable for a superconducting transformer coil, a plurality of superconducting wires change their radial positions at at least one dislocation location in the coil axial direction. A dislocation configuration is described in which the difference in induced voltage due to the difference in the radial position of each superconducting wire is canceled, that is, the proportion of all the superconducting wires in the radial direction is equal.
Japanese Patent Application No. 11-78819 describes a dislocation configuration of a superconducting wire suitable for a pancake superconducting coil.
[0019]
As described above, in the invention of claim 1, by rearrangement superconducting conductor in superconducting conductor assembly itself in a conduit are a structure made uniform current distribution, details of which will be described later. Further, by making the superconducting conductor rectangular, the dislocation configuration is facilitated as will be described later.
[0020]
Furthermore, in the first aspect of the present invention, the superconducting conductor is a high-temperature superconducting conductor, but in recent years, a high-temperature superconducting conductor having a critical temperature of 110K has been put into practical use. Using such a high-temperature superconducting conductor having a high critical temperature and using, for example, 20K helium gas as a refrigerant, a large temperature difference between the temperature of the refrigerant and the critical temperature causes quenching even if heat is generated. Since the heat capacity of the superconducting conductor is increased, it can be operated more safely.
[0021]
In addition, as the embodiments of the invention relating to the electromagnetic force support or the refrigerant flow path, the inventions of the following claims 2 to 5 are suitable.
[0022]
First, the in those claims 1 Symbol placement, the Konji' The reserve and electromagnetic force supporting member sectional shape of a rectangular (invention of claim 2). Thereby, electromagnetic force support becomes more reliable .
[0023]
The electromagnetic force support member according to claim 2 , wherein the electromagnetic force support member includes an inner surface of the conduit corresponding to three sides and an outer surface of the superconducting conductor assembly among four sides forming a rectangle of the conduit having the rectangular cross section. disposed between the and to dispose at a predetermined distance in the longitudinal direction of the superconducting conductor assembly (invention of claim 3). Thereby, as will be described later, when the coil is formed, both the electromagnetic force support of the superconducting conductor assembly in the radial direction of the coil and the electromagnetic force support in the axial direction are ensured.
[0024]
Furthermore, in the above-described third aspect , at least one of the electromagnetic force support members is provided with a refrigerant flow path in the support member (invention of the fourth aspect ). Thereby, the cross-sectional area of the refrigerant flow path is increased, and the pressure loss of the refrigerant is reduced.
[0025]
Furthermore, in the above-described third or fourth aspect, the refrigerant flow path in the longitudinal direction of the superconducting conductor assembly corresponds to the three sides so that the refrigerant flow is alternately (zigzag) vertically or horizontally. Of the inner surface of the conduit, the arrangement of the electromagnetic force support member disposed between the inner surface of the conduit corresponding to two opposing sides and the outer surface of the superconducting conductor assembly is vertically or horizontally in the longitudinal direction of the superconducting conductor assembly. Alternately (the invention of claim 5 ). Thereby, the cooling efficiency of the superconducting conductor assembly can be further improved.
[0026]
Further, the invention of claim 6 is suitable as a superconducting magnet to which the conduit type forced cooling superconducting conductor is applied. That is, the conduit type forced cooling superconducting conductor according to any one of claims 1 to 5 is disposed in such a direction that the electromagnetic force supporting member supports at least the radial direction of the coil in the electromagnetic force acting on the superconducting conductor assembly. A superconducting coil wound in layers on a winding frame, and a vacuum vessel that insulates and stores the superconducting coil, and passes a cryogenic refrigerant generated in the refrigerator into the conduit of the conduit type forced cooling superconducting conductor. flowed it configured to cool the superconducting coil.
[0027]
In the above, the electromagnetic force is disposed in the direction in which the electromagnetic force support member supports at least in the radial direction of the coil , details will be described later, but with the above configuration, good support of the large electromagnetic force acting on the superconducting conductor, A large superconducting magnet can be obtained which effectively removes heat generated due to AC loss and further ensures uniform current shunting.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0029]
FIG. 1 shows a sectional view of an embodiment of a conduit type forced cooling superconducting conductor according to the present invention, and FIG. 2 shows a perspective view of an example of a superconducting conductor assembly.
[0030]
In the conduit type forced cooling superconducting conductor of this embodiment, a superconducting conductor assembly 20 in which a dislocated superconducting conductor 21 described later is integrated with a molding tape 24 is installed inside the conduit 25. In the conduit 25, electromagnetic force support members 23a, 23b, and 23c are arranged at a predetermined interval in the longitudinal direction of the superconducting conductor assembly 20 in order to fix the superconducting conductor 21. The conduit, the electromagnetic force support member, and the superconducting conductor 21 have a rectangular cross section in FIG. 1, but the shape is not limited. However, in view of electromagnetic force support and dislocation structure, a rectangular cross section is preferred. The conduit 25 has, for example, a split structure and is divided into a U-shape and a cover plate, and the superconducting conductor assembly 20 and the electromagnetic force support members 23a, 23b, and 23c are arranged and integrated by welding.
[0031]
In this configuration, the superconducting conductor 21 is cooled by flowing the refrigerant through the refrigerant flow path 22. As shown in FIG. 1, the refrigerant flow path 22 is arranged at the location where the electromagnetic force support members 23 a, 23 b, and 23 c are disposed in the longitudinal direction of the superconducting conductor assembly 20. It is formed by the outer surfaces of the support members 23a, 23b, and 23c, and is formed by the inner surface of the conduit 25 and the outer surface of the superconducting conductor assembly 20 at places where the electromagnetic force support members 23a, 23b, and 23c are not disposed. The
Heat generated by AC loss can be cooled by appropriately setting the flow rate and temperature of the refrigerant.
Therefore, since the refrigerator operation according to the calorific value is possible, it is possible to reduce the refrigerator operating power by adjusting the refrigerant flow rate according to the coil operating conditions.
[0032]
When the conduit type forced cooling superconducting conductor of this embodiment is formed into a superconducting coil, the coil is wound around the superconducting conductor 21 so that the electromagnetic force in the radial direction of the coil acts upward in FIG. The electromagnetic force in the radial direction of the coil acts on the conduit 25 via the electromagnetic force support member 23a, and the final electromagnetic force support is performed by the conduit.
Accordingly, the material of the conduit and the electromagnetic force support member is a high-strength material, and generally stainless steel or titanium is used.
[0033]
The electromagnetic force support in the coil axis direction when the superconducting coil is formed is supported by the conduit 25 via the electromagnetic force support members 23b and 23c. However, in some cases, the electromagnetic force support members 23b and 23c can be omitted.
[0034]
Further, the electromagnetic force supporting members 23a, 23b, and 23c are disposed at the same position in the longitudinal direction of the superconducting conductor assembly 20 as the arrangement positions in the longitudinal direction of the superconducting conductor assembly 20. The electromagnetic force support members 23 a, 23 b, and 23 c may be arranged at different positions in the longitudinal direction of the superconducting conductor assembly 20.
[0035]
As described above, the superconducting conductor 21 is preferably a high-temperature superconducting conductor, which is dislocated as described later to form the superconducting conductor assembly 20.
[0036]
For high-temperature superconducting conductors, (1) Bi2212 (Bi ₂ Sr ₂ Ca ₁ Cu ₂ O ₈ ): critical temperature 80K, (2) Bi2223 (Bi ₂ Sr ₂ Ca ₂ Cu) ₃ O ₁₀ ): critical temperature 110K, (3) Y123 (YBa ₂ Cu ₃ O _x ): critical temperature 90K, etc. Currently, Bi2223 is industrially produced, and a rectangular one having a cross-sectional shape is produced, which is particularly suitable for the configuration of the present invention.
[0037]
FIG. 2 is an enlarged view of the dislocated high-temperature superconducting conductor portion of the present embodiment. For example, a molding tape 24 made of stainless steel or the like is wound around the high-temperature superconducting conductor 21 and integrated. As in this embodiment, by winding the molding tape 24 with a gap in the longitudinal direction of the high-temperature superconducting conductor 21, the high-temperature superconducting conductor 21 and the refrigerant can be in direct contact with each other, and the cooling is improved. Moreover, by providing a through-hole in the molding tape 24, the area in contact with the refrigerant can be increased and cooling can be performed effectively. In this case, the gap can be narrowed or absent. In addition, the shaping | molding tape inclination part of FIG. 2 was simplified in FIG. 1, and was shown with the straight line.
[0038]
Next, the dislocation structure of the superconducting conductor of the superconducting conductor assembly 20 according to the embodiment of the present invention will be described with reference to FIG. Fig.3 (a) shows the typical perspective view of the dislocation part of the superconducting conductor in a superconducting conductor assembly. FIG. 3B is a diagram for explaining the principle of dislocation when five superconducting conductors are used for convenience of explanation.
[0039]
As shown in FIG. 3 (b), the superconducting conductors of Nos. 1 to 5 are sequentially displaced from the initial state and changed their positions so that the five conductors experience all positions in the cross-sectional configuration; Therefore, the inductance is the same for the five conductors. Therefore, when the dislocation conductor as described above is formed into a coil, as described above, the difference in induced voltage due to the difference in the radial position of the superconducting wire can be canceled (see Japanese Patent Laid-Open No. 10-172824). Although FIG. 3 shows an example in which the conductors have two stages on the left and right, in principle, the conductors may have three stages and four stages. However, considering the ease of manufacture, two stages are desirable.
[0040]
FIG. 4 shows a cross-sectional view of a different embodiment of a conduit-type forced cooling superconducting conductor according to the present invention. The difference between FIG. 1 and FIG. 4 is that in FIG. 4, the electromagnetic force support members 123 a, 123 b, and 123 c have a plurality of in-support-member refrigerant flow paths 26. With this configuration, the cross-sectional area of the refrigerant channel is increased, and the pressure loss of the refrigerant is reduced. Therefore, the burden on the refrigeration equipment can be reduced and the size can be reduced.
[0041]
FIG. 5 is a conceptual cross-sectional view of a further different embodiment of the conduit-type forced cooling superconducting conductor according to the present invention, and shows a cross-sectional view along the AA arrow in FIG. In FIG. 5, the arrows indicate the flow of the refrigerant. In this embodiment, the refrigerant flow path in the longitudinal direction of the superconducting conductor assembly 20 is formed on the inner surface of the conduit 25 so as to flow alternately (zigzag) vertically or horizontally (shown vertically in FIG. 5). The electromagnetic force supporting members 23b and 23c provided on the two opposite sides are alternately arranged vertically or horizontally (up and down in FIG. 5) in the longitudinal direction of the superconducting conductor assembly 20. In this case, each of the electromagnetic force support members 23a, 23b, and 23c may have a support member refrigerant flow path. With this configuration, the cooling efficiency of the superconducting conductor is further improved.
[0042]
Next, an embodiment of a superconducting magnet to which the conduit type forced cooling superconducting conductor is applied will be described. FIG. 6 is a schematic cross-sectional view relating to the configuration of the embodiment of the superconducting magnet.
[0043]
In FIG. 6, the conduit type forced cooling superconducting conductor 100 is wound around the winding frame 30. In FIG. 6, the arrow indicates the direction in which the electromagnetic force acts. For example, in the case of the conduit type forced cooling superconducting conductor indicated by the number 1, the direction in which the lower side of the conduit type forced cooling superconducting conductor in FIG. Thus, the electromagnetic force support member 23a can optimally support the electromagnetic force in the radial direction.
[0044]
Moreover, in order to insulate between turns and rares, the outer surface of a conduit is insulation-coated with a resin material, for example. Furthermore, the flow of the refrigerant, for example, in the case of cylinder winding, the refrigerant flows in the order of the conduit type forced cooling superconducting conductor numbers 1, 2,..., 10 and is connected in the refrigerant pipe connection device 40 and flows to the adjacent conduit. Similarly, the refrigerant flow path is configured. In the case of pancake winding, the refrigerant flows in the order of the conduit type forced cooling superconducting conductor numbers 1, 11,..., 20 and is similarly connected in the refrigerant pipe connecting device 40 and flows to the adjacent conduit.
[0045]
By configuring the superconducting magnet as described above, it is possible to provide a superconducting magnet that is optimized such as support of electromagnetic force acting on the superconducting conductor, effective removal of heat generation, and uniform current shunting.
[0046]
【Effect of the invention】
According to the present invention, as described above, in the conduit type forced cooling superconducting conductor provided with a plurality of superconducting conductors and a refrigerant flow path inside the conduit, the outer peripheral surface of the plurality of superconducting conductors is formed in the longitudinal direction of the conductor with the molding tape. A superconducting conductor assembly wound in a spiral manner, at least one electromagnetic force support member disposed between the inner surface of the conduit and the outer surface of the superconducting conductor assembly, and the inner surface of the conduit and the superconducting conductor assembly. A high-temperature superconducting conductor having a refrigerant flow path formed by an outer surface and an outer surface of the electromagnetic force support member and having a rectangular cross-sectional shape is used as the superconducting conductor, and the superconducting conductor assembly has a uniform current distribution. In order to allow each superconducting conductor to experience all the positions in the cross-sectional configuration by sequentially transposing a plurality of superconducting conductors and changing their positions. With shall, even when the superconducting coil is AC losses in size is increased, by supplying a coolant to the interior conduit, it can be suitably cooled superconducting conductor. Further, the electromagnetic force acting on the superconducting conductor can be suitably supported in the conduit via the electromagnetic force support member.
[0047]
In addition, the superconducting conductor assembly is formed by transposing a plurality of superconducting conductors to make the current shunting uniform, so that the current shunting is made uniform, unlike a conventional superconducting conductor assembly having a stranded wire configuration. Since the superconducting conductor assembly itself displaces the superconducting conductor to make the current distribution uniform, it is easy to form a large-capacity coil.
[0048]
Further, when the above-described conduit type forced cooling superconducting conductor is applied to a superconducting magnet, the electromagnetic force acting on the superconducting conductor assembly is arranged in a direction in which the electromagnetic force supporting member supports at least the radial direction of the coil , A superconducting coil wound in layers, and a vacuum container for insulating and storing the superconducting coil, and passing the cryogenic refrigerant generated in the refrigerator through the conduit of the conduit type forced cooling superconducting conductor By adopting a configuration that cools the coil, it is possible to achieve optimization such as support of electromagnetic force acting on the superconducting conductor, effective removal of heat generation, and uniform current shunting.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an embodiment of a conduit-type forced cooling superconducting conductor of the present invention. FIG. 2 is a perspective view of an example of the superconducting conductor assembly of the present invention. FIG. 4 is a cross-sectional view of an embodiment of a conduit-type forced cooling superconducting conductor different from FIG. 1 of the present invention. FIG. 5 is an embodiment of a conduit-type forced cooling superconducting conductor different from that of FIG. FIG. 6 is a schematic cross-sectional view related to the configuration of an embodiment of the superconducting magnet of the present invention. FIG. 7 is a cross-sectional view schematically showing the basic configuration of a conventional superconducting magnet. Fig. 9 is an enlarged cross-sectional view of a superconducting coil portion showing a configuration example of a magnet. Fig. 9 is a diagram showing an example of a schematic cross-sectional structure of a conventional conduit superconductor.
20: Superconducting conductor assembly, 21: Superconducting conductor, 22: Refrigerant flow path, 23a, 23b, 23c, 123a, 123b, 123c: Electromagnetic force support member, 24: Molding tape, 25: Conduit, 26: Refrigerant in support member Flow path, 30: reel, 40: refrigerant pipe connection device, 100: conduit type forced cooling superconducting conductor.

Claims (6)

In a conduit type forced cooling superconducting conductor having a plurality of superconducting conductors and a refrigerant flow path inside the conduit, the superconducting conductor is formed by spirally winding the outer peripheral surface of the plurality of superconducting conductors over the longitudinal direction of the conductor with a molding tape. Formed by an assembly, at least one electromagnetic force support member disposed between the inner surface of the conduit and the outer surface of the superconducting conductor assembly, and the inner surface of the conduit, the outer surface of the superconducting conductor assembly, and the outer surface of the electromagnetic force support member A high-temperature superconducting conductor having a rectangular cross-sectional shape as the superconducting conductor, and the superconducting conductor assembly sequentially displaces a plurality of superconducting conductors in order to make current shunting uniform. Te, by changing its position, and wherein the Rukoto such by experiencing all positions in the cross-sectional configuration to each superconductor conduit Forced cooling superconducting conductor. In those claims 1 Symbol placement, the Konji' The reserve and electromagnetic force supporting member is a conduit type forcibly cooled superconductor, characterized by the cross-sectional shape as the rectangle. 3. The electromagnetic force support member according to claim 2 , wherein the electromagnetic force support member is disposed between the inner surface of the conduit corresponding to three sides and the outer surface of the superconducting conductor assembly among the four sides forming the rectangle of the conduit having the rectangular cross section. arranged to, and the conduit type forcibly cooled superconductor, characterized by arranging at a predetermined distance in the longitudinal direction of the superconducting conductor assemblies. 4. The conduit type forced cooling superconducting conductor according to claim 3 , wherein at least one of the electromagnetic force support members includes a refrigerant flow path in the support member. 5. The thing of Claim 3 or 4 WHEREIN: The refrigerant | coolant flow path in the longitudinal direction of a superconducting conductor assembly turns into the flow path which flows alternately up and down or right and left (zigzag) of the inner surface of the conduit corresponding to the said 3 sides. The arrangement of the electromagnetic force support members disposed between the inner surface of the conduit corresponding to the two opposite sides and the outer surface of the superconducting conductor assembly is alternated vertically or horizontally in the longitudinal direction of the superconducting conductor assembly. Conduit type forced cooling superconducting conductor. A conduit-type forced cooling superconducting conductor according to any one of claims 1 to 5 , wherein the electromagnetic force acting on the superconducting conductor assembly is arranged in a direction in which the electromagnetic force supporting member supports at least the radial direction of the coil . A superconducting coil wound in layers on a frame; and a vacuum container that insulates and stores the superconducting coil, and passes a cryogenic refrigerant generated in the refrigerator through the conduit type forced cooling superconducting conductor. A superconducting magnet characterized in that the superconducting coil is cooled.

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