JP2010245511A - Superconducting magnet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a superconducting magnet capable of easily introducing a resin before reaction up to the deepest section of a channel existing between superconducting wires forming a coil and having a long distance. <P>SOLUTION: The superconducting magnet 10 includes: a substantially cylindrical spool 1 made of aluminum or stainless; plate members 2 and 3; and a coil comprising a superconducting wire (not shown). The spool 1 includes: a cylindrical member 1a; and flanges 1b and 1c formed in both ends of the cylindrical member 1a. The plate members 2 and 3 are arranged so as to be brought into contact with surfaces on sides facing the flanges 1b and 1c, respectively. Each of the plate members 2 and 3 is a ring member, and has a plurality of slits formed so as to cut in from an opening end of the outer side edge toward the inner side thereof in a radial direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention includes a winding frame having a first flange and a second flange at each end, and a coil made of a superconducting wire wound around the winding frame, and a superconducting wire between the superconducting wires. The present invention relates to a superconducting magnet in which a fixing impregnation material is permeated and solidified.

  In a superconducting magnet that generates a high magnetic field and is used at extremely low temperatures, the temperature of a part of the superconducting wire forming the coil rises and exceeds the critical temperature, and the superconducting state is broken even with a slight heat generation. There is a phenomenon called quench. The cause of the heat generation that causes this quench is mainly the frictional heat generated by the inadvertent movement of the superconducting wire due to the electromagnetic force generated by the interaction with the self-generated magnetic field. In order to avoid this frictional heat generation, the superconducting magnet should be configured to constrain the superconducting wire from moving inadvertently by allowing a filler such as epoxy resin or wax to flow into the gap between the superconducting wires and then solidifying. Is common. As a method for allowing such a filler to flow between the superconducting wires, there are an impregnation method and a coating method.

  In the impregnation method, after placing a superconducting magnet, in which a coil is formed by winding a superconducting wire, in a container (potting can) with an open top, a resin in a fluid state before reaction / solidification is poured into the container, It penetrates into the gaps between the superconducting wires. In particular, in order to maintain good permeability, the container and the superconducting magnet are housed in a vacuum container, the inside of the container is evacuated in advance, and after impregnating material is poured therein, the method of infiltrating the gap between the superconducting wires ( This is called a vacuum impregnation method (for example, see Patent Document 1 below). Then, after the permeation of the resin is completed, the temperature of the object is raised and the resin is solidified to complete the impregnation / solidification.

Japanese Patent Laid-Open No. 4-120708

  The coating method includes resin leakage in the work process, contamination of the coil winding device (winding device), etc., and is generally difficult to adopt from the viewpoint of production. In particular, the above-described vacuum impregnation method is used in order for the resin to penetrate into the gaps between the superconducting wires without voids. However, as shown in the schematic diagram of FIG. 7, for example, when the coil 104 is formed by using a superconducting wire 101 having a circular cross section and tightly winding around a winding frame 102 having flanges at both ends of a cylindrical member. The cross section of the coil 104 is shaped like a pile of ridges, and the gap between the superconducting wires 101 becomes a single spiral flow path 103 having a substantially triangular cross section. Will penetrate. There are only one opening (two locations for one superconducting magnet) at each end of the outer peripheral surface of the coil 104 in the flow path 103 communicating with the outside.

  In this way, in one spiral flow path 103 having only two openings, in order for the impregnating material to reach the deepest part (the axial center in the superconducting magnet cross section (the inner diameter side of the coil)) You have to flow in a long distance. Here, the distance was estimated using an example of a superconducting magnet.

If the diameter of the superconducting wire is d, the outer diameter of the coil is D ₁ , the inner diameter of the coil is D ₂ , and the length of the magnet is L, the number of turns per coil layer = L / d, the number of coil layers = ( D ₁ −D ₂ ) / 2d, penetration distance = [{(D ₁ −D ₂ ) / 2π} · (L / d) · {(D ₁ −D ₂ ) / 2d}] / 2. Here, for example, when the diameter d of the superconducting wire is 0.001 m (= 1 mm), the flow path has a triangular cross-sectional shape with a side of approximately 0.5 mm. Further, when D ₁ = 0.2 m, D ₂ = 0.1 m, and L = 0.2 m, the total distance of the flow path (the distance that requires the resin to permeate) is 3900 m or more.

  In this way, the resin before reaction having a significant viscosity is poured into the deepest part of one spiral flow path 103 that exists between the superconducting wires forming the coil 104 and has a long distance. In some cases, the vacuum impregnation method is not easy, and the impregnating material such as resin does not sufficiently permeate, leaving a gap in the flow path. Since the superconducting magnet having the coil 104 having such a gap has a weak fixing force of the superconducting wire, the above-described quench is frequently caused.

  The present invention has been made in view of the above-mentioned problems, and it is present between the superconducting wires forming the coil, and the resin before reaction is easily poured into the deepest part of the flow path having a long distance. An object of the present invention is to provide a superconducting magnet that can be used.

Means and effects for solving the problems

  In the present invention, the following features are provided alone or in combination as appropriate. A superconducting magnet according to the present invention for solving the above-described problems includes a winding frame having a first flange and a second flange at each end, and a coil made of a superconducting wire wound around the winding frame. A superconducting magnet in which a superconducting wire fixing impregnating material is infiltrated and solidified between the superconducting wires, and a plate member having at least one slit formed so as to cut inward from an outer edge portion Is sandwiched between the first flange and the coil.

  According to the above configuration, it is possible to use the openings of the flow path formed between the layers of the coil that have been closed in contact with the flange of the winding frame at both ends of the coil. It is possible to provide a superconducting magnet in which an impregnating material for fixing a superconducting wire such as a resin can be easily poured into the deepest part of the flow path between the superconducting wires forming the coil. In particular, it is suitable for impregnating a superconducting wire fixing impregnation material such as a resin into a flow path existing in a coil formed by being tightly wound.

  In the superconducting magnet of the present invention, a plate member having at least one slit formed so as to cut inward from the outer edge is sandwiched between the second flange and the coil. It is preferable.

  According to the above configuration, it is possible to provide a superconducting magnet capable of infiltrating the resin not only from the opening of the flow path on the one end side of the coil but also from the opening of the flow path on the other end side of the coil. As a result, it is possible to infiltrate the superconducting wire fixing impregnation material more rapidly to the deepest part of the flow path.

  In the superconducting magnet of the present invention, it is preferable that the plate member is formed of a polymer material that is difficult to adhere to the superconducting wire fixing impregnation material. Here, the hard-to-adhere polymer material is a polymer material to which an impregnating material such as resin is difficult to adhere.

  According to the said structure, since it can make it difficult to adhere to a board member, since flow resistance can be made low, the impregnation material for superconducting wire fixation can be osmose | permeated more rapidly to the deepest part of a flow path.

  Further, in the superconducting magnet of the present invention, the high conductivity of the superconducting wire fixing impregnation material is high between at least one of the first flange and the second flange and the plate member. It is preferable that a hardly-adhesive plate member made of a molecular material is sandwiched or a film of the hardly-adhesive polymer material is formed.

If the plate member is made of a material having relatively high adhesiveness (for example, fiber reinforced plastic), the hardly adhesive plate member made of a hardly adhesive polymer material between the plate member and the flange. Or forming a film of the polymer material makes it difficult for the superconducting wire fixing impregnating material to adhere to the plate member and lowers the flow resistance. As a result, the superconducting wire fixing impregnating material can be permeated more rapidly to the deepest part of the flow path.

  In the superconducting magnet of the present invention, the film of a polymer material that is difficult to adhere to the superconducting wire fixing impregnation material is a coil of at least one of the first flange and the second flange. It is preferable that the side surface is formed by a coating treatment.

  The flange whose surface is coated with a difficult-to-adhere polymer material (for example, PTFE) and the plate member are hardly bonded with an impregnating material (impregnating material for fixing a superconducting wire). That is, according to the said structure, the slipperiness between a flange and a plate member improves, and it can prevent that a superconducting wire moves carelessly. As a result, the occurrence of quenching can be prevented. In addition, the effect of improving the slipperiness can be obtained by coating the surface of the flange with a hardly adhesive polymer material. On the other hand, an impregnation material (impregnation for fixing the superconducting wire) is made between the superconducting wires by the slit of the plate member. Material), the degree of freedom in selecting the material of the plate member is increased.

  In the superconducting magnet of the present invention, the plate member is preferably made of polyethylene terephthalate or polyimide. According to this structure, the non-uniformity | non-uniformity of the slip between the flange with which the surface was coated with the polymer material (for example, PTFE) which is hard to adhere, and a board member is suppressed. As a result, the occurrence of quenching can be further prevented. According to this configuration, the plate member and the coil are bonded with the impregnating material (epoxy), but the portion where the slip occurs is limited between the flange on the side far from the coil and the plate member. That is, the occurrence of quenching is suppressed.

  In the superconducting magnet of the present invention, the plate member is preferably made of a nonmagnetic metal. In general, a metal (nonmagnetic metal) has a higher thermal conductivity than a resin. That is, according to this structure, the heat generated by the slip between the flange and the plate member can be dispersed, and as a result, the occurrence of quenching can be further prevented. According to this configuration, the plate member and the coil are bonded with the impregnating material (epoxy), but the portion where the slip occurs is limited between the flange on the side far from the coil and the plate member. That is, the occurrence of quenching is suppressed.

  In the superconducting magnet of the present invention, the plate member is preferably made of aluminum or copper. Aluminum or copper is a metal having a large thermal conductivity among many metals. That is, according to this structure, the heat generated by the slip between the flange and the plate member can be further dispersed.

In the superconducting magnet of the present invention, the hard-to-adhere polymer material may be an ethylene fluoride (partial fluoride) such as polytetrafluoroethylene (PTFE) or tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA). Ethylene copolymer) or a copolymer thereof. According to this configuration, the superconducting wire fixing impregnating material becomes difficult to adhere to the plate member, and the flow resistance is lowered. As a result, the superconducting wire fixing impregnating material can be permeated more rapidly to the deepest part of the flow path.

  Further, as fluorinated ethylene other than those exemplified above or copolymers thereof, polychlorotrifluoroethylene (PCTFE, trifluoride), tetrafluoroethylene / hexafluoropropylene copolymer (FEP, 4/6 fluoride), Tetrafluoroethylene / ethylene copolymer (ETFE), polyvinylidene fluoride (PVDF, difluoride), polychlorotrifluoroethylene (PCTFE, trifluoride), chlorotrifluoroethylene / ethylene copolymer (ECTFE), etc. Can be mentioned. The hardly adhesive polymer material is particularly preferably polytetrafluoroethylene (PTFE).

  A superconducting magnet according to the present invention for solving the above-mentioned problems is a coil comprising a winding frame having a first flange and a second flange at each end, and a superconducting wire wound around the winding frame. A superconducting magnet in which a superconducting wire fixing impregnation material is infiltrated and solidified between the superconducting wires, and at least one of the first flange and the second flange has an outer edge At least one slit formed on the coil side surface so as to cut inwardly from the portion, and the coil side surface of the flange having the slit is difficult to impregnate the superconducting wire fixing material. A film is formed of an adhesive polymer material.

  According to the above configuration, it is possible to use the openings of the flow path formed between the layers of the coil that have been closed in contact with the flange of the winding frame at both ends of the coil. It is possible to provide a superconducting magnet in which an impregnating material for fixing a superconducting wire such as a resin can be easily poured into the deepest part of the flow path between the superconducting wires forming the coil. In particular, it is suitable for impregnating a superconducting wire fixing impregnation material such as a resin into a flow path existing in a coil formed by being tightly wound.

It is the structure schematic sectional drawing which showed the winding frame and board member of the superconducting magnet which concern on embodiment of this invention. It is a top view of the plate member in the superconducting magnet concerning a 1st embodiment of the present invention. FIG. 2 is a cross-sectional view for use in explaining a process of impregnating a superconducting wire fixing impregnating material into a flow path formed between superconducting wires of a coil of the superconducting magnet shown in FIG. 1. It is a figure which shows the modification of the plate member of the superconducting magnet which concerns on embodiment of this invention. It is a figure which shows the superconducting magnet which concerns on the modification of embodiment of this invention, Comprising: (a) is sectional drawing, (b) is II sectional view taken on the line of (a). It is a figure which shows the superconducting magnet which concerns on other embodiment of this invention, Comprising: (a) is sectional drawing, (b) is the II-II sectional arrow view of (a). It is the schematic cross section which showed the conventional superconducting magnet.

  Embodiments of a superconducting magnet according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a superconducting magnet winding frame and plate member according to an embodiment of the present invention.

  A superconducting magnet 10 includes a substantially cylindrical winding frame 1 made of aluminum or stainless steel, plate members 2 and 3, and a coil 4 made of a superconducting wire. The reel 1 has a cylindrical member 1a and flanges 1b and 1c formed at both ends of the cylindrical member 1a.

  The plate members 2 and 3 are disposed so that the flanges 1b and 1c are in contact with the opposing surfaces. Each of the plate members 2 and 3 is a ring-shaped member as shown in FIG. 2, and has a plurality of slits 2a and 3a formed so as to cut in the radial direction from the opening end of the outer edge portion inward. is doing. The plate members 2 and 3 are made of a hardly-adhesive polymer material such as polytetrafluoroethylene. The thickness of the plate members 2 and 3 is about 0.5 mm to 2 mm. The widths of the slits 2a and 3a are about 0.5 mm to 2 mm (the same applies to the slits shown in FIGS. 5 and 6). In addition, although the slit has reached | attained from the outer edge part to the inner edge part only at one place, it can be easily attached to the reel 1 by shifting this part in the opposite direction.

  Further, between the plate members 2 and 3 in the winding frame 1, a coil formed by closely winding the superconducting wire as in FIG. 7 is provided.

  Next, the process of infiltrating the superconducting wire fixing impregnation material such as epoxy resin or wax into the flow path formed between the superconducting wires of the coil of the superconducting magnet will be described. When using wax as the impregnating material for fixing the superconducting wire, it is necessary to select wax that is solid at room temperature.

  First, each part in FIG. 3 will be described in detail as follows. An impregnation container 21 capable of storing the superconducting wire fixing impregnation material is disposed in the vacuum container 22. The superconducting magnet 10 is accommodated in the impregnation container 21. The vacuum vessel 22 has a pipe 23 for supplying a superconducting wire fixing impregnating material and a pipe 24 used for evacuation.

  Next, a process of infiltrating the superconducting wire fixing impregnating material into the flow path formed between the superconducting wires of the coil 4 of the superconducting magnet 10 will be described using the configuration of FIG. First, after the superconducting magnet 10 is disposed in the impregnation vessel 21, the vacuum vessel 22 is evacuated. Subsequently, a superconducting wire fixing impregnating material in a fluid state is poured into the impregnation vessel 21, the superconducting magnet 10 is immersed in the superconducting wire fixing impregnating material, and a flow path formed between the superconducting wires of the coil 4 ( The same as in the flow path 103 in FIG. FIG. 3 shows the state at this time.

  Here, the permeation of the superconducting wire fixing impregnation material into the above-described flow path will be described in more detail. As described above, when the superconducting magnet 10 is immersed in the impregnating material for fixing the superconducting wire, the plate members 2 and 3 originally have the slits 2a and 3a, respectively. The superconducting wire fixing impregnating material starts to flow into the flow path in the coil 4 from the opening (not shown), and the superconducting wire fixing impregnating material flows along the slits 2a and 3a. Subsequently, among the openings (not shown) adjacent to the slits 2a and 3a at both ends of the coil 4 (openings of the flow paths formed between the layers at both ends of the coil 4), the openings on the outer diameter side The superconducting wire fixing impregnation material flows into the flow path in the coil 4 in order. That is, from the initial stage of impregnation, the superconducting wire fixing impregnating material can be poured into the flow path on the inner diameter side in the coil 4. By these steps, the superconducting wire fixing impregnating material can be poured into the central flow path of the coil 4 easily and quickly.

  According to the above configuration, since the opening of the coil that has been closed in contact with the flange of the winding frame can be used, the deepest flow path between the superconducting wires forming the coil 4 can be used. Thus, it is possible to provide the superconducting magnet 10 capable of easily flowing the impregnating material for fixing the superconducting wire such as resin. In particular, it is suitable for impregnating a superconducting wire fixing impregnation material such as a resin into a flow path existing in the coil 4 formed by being tightly wound.

  Further, since the plate members 2 and 3 having a plurality of slits 2a and 3a formed so as to cut in the radial direction from the opening end of the outer edge portion to the inner side are provided, It is possible to provide the superconducting magnet 10 that can infiltrate the resin not only from the opening of the flow path but also from the opening of the flow path on the other end side of the coil 4. As a result, it is possible to infiltrate the superconducting wire fixing impregnation material more rapidly to the deepest part of the flow path. In addition, although any one of the plate members 2 and 3 may be sufficient, it cannot be overemphasized that an effect is inferior compared with the case where these two are provided.

  Since the plate members 2 and 3 are made of a hard-to-bond polymer material, it is difficult to bond the impregnating material for fixing the superconducting wire, and the flow resistance can be lowered. Impregnating material can be infiltrated.

  The present invention can be modified in design without departing from the scope of the claims, and is not limited to the above embodiment. For example, as a modification, instead of the plate members 2 and 3 shown in the above embodiment, the shape of each slit as shown in FIG. 4 or the direction of cutting is changed (for example, with respect to the radial direction). It is good also as the board member 22 which has a thing cut in the direction inclined by a predetermined angle. In addition, various shapes are possible without being limited to these slit shapes. Furthermore, although it is good also as a plate member which combined the slit of various shapes suitably, it is good also as a plate member which has at least 1 or more each slit.

  Moreover, in the plate members 2 and 3 shown by the said embodiment, although the number of the slits was eight, it is not restricted to this, Seven or less may be sufficient and nine or more may be sufficient. Moreover, although it provided at equal intervals, it is not restricted to this, It does not need to be equal intervals and there may be the bias | inclination of the space | interval of narrow or wide.

  Moreover, as shown to Fig.5 (a), you may provide so that the plate members 32 and 33 may be directly affixed on the coil 34 side of the flanges 31b and 31c, respectively. As shown in FIG. 5B, the plate member 33 has eight fan-shaped plate members 33a and slits 33b formed between the fan-shaped plate members 33a. The plate member 32 is the same as the plate member 33. Further, the members 30, 31, 31a, 31b, 31c, and 34 are members similar to the members 10, 1, 1a, 1b, 1c, and 4 of the above-described embodiment in order, and thus the description thereof is omitted.

  In FIG. 1, when the plate members 2 and 3 are not made of a difficult-to-adhere polymer material, but are made of a material having a relatively high adhesive property such as fiber reinforced plastic (FRP), for example, Between the members 2 and 3 and the flanges 1b and 1c (may be both sides or only one side), a hard-to-adhere plate member made of a hard-to-adhere polymer material may be further provided (sandwiched). It is preferable to form a film of a polymer material having poor adhesion. Thereby, it becomes difficult for the impregnating material for superconducting wire fixation to adhere to the plate members 2 and 3, and the flow resistance is lowered. As a result, the superconducting wire fixing impregnating material can be permeated more rapidly to the deepest part of the flow path. In addition, the thickness of an above-mentioned hardly adhesive board member (without a slit) is about 0.1 mm-1 mm. Moreover, the thickness of the film of the above-mentioned hardly adhesive polymer material is about 10 μm to 100 μm. Further, this film is formed on the surfaces of the plate members 2 and 3 and the surfaces of the flanges 1b and 1c.

  Furthermore, a superconducting magnet 40 as shown in FIG. 6 may be used. The superconducting magnet 40 of this embodiment does not have members corresponding to the plate members 2 and 3 of the superconducting magnet 1 shown in FIG. The superconducting magnet 40 has a slit 41cs formed so as to cut inward from the outer edge portion on the surface of the flange 41c of the winding frame 41 on the coil 44 side. A slit 41cs having a predetermined depth is formed on the surface of the flange 41c on the coil 44 side. That is, the slit 41cs of the present embodiment is a bottomed slit. Regarding the form of the slit 41cs, except that the slit 41cs is bottomed, it is the same form as the slits (2a, 3a, 33b) of the other embodiments (the form of the slit as shown in FIG. 4). Also good). The flange 41b also has a slit 41bs similar to the slit 41cs formed on the surface on the coil 44 side.

  Here, a polymer film (including the surfaces of the slits 41cs and the slits 41bs) is formed on the surface of the flange 41c and the flange 41b on the side of the coil 44 with a polymer material having poor adhesion such as polytetrafluoroethylene. Is preferred. The thickness of this film is about 10 μm to 100 μm. This is to reduce the flow resistance of the impregnating material for fixing the superconducting wire and improve its permeability. In addition, since the member of the code | symbol 41a is a member similar to the code | symbol 31a of the said embodiment, description is abbreviate | omitted.

  The above-described superconducting magnet 10 and the superconducting magnet 40 of the present embodiment both have slits formed so as to be cut inwardly from the outer edge portion, and therefore have a corresponding special feature that is not found in the prior art. It has technical features.

(Flange surface coating)
In the superconducting magnet 10 shown in FIG. 1, the surfaces of the flanges 1b and 1c on the side of the coil 4 are made of a polymer material (for example, polytetrafluoroethylene (PTFE)) that is difficult to adhere to the superconducting wire fixing impregnation material. It is preferable that the coating is applied (the same applies to the superconducting magnet 30 shown in FIG. 5). Only one flange 1b (or flange 1c) may be coated.

  Here, if the flanges 1b and 1c and the plate members 2 and 3 are temporarily bonded, the movement of the coil 4 is restricted, and the superconducting wire constituting the coil 4 may move carelessly. However, if the surface of the flanges 1b and 1c on the side of the coil 4 is coated with, for example, PTFE, the flanges 1b and 1c and the plate members 2 and 3 are not easily bonded with an impregnating material (impregnating material for fixing a superconducting wire). . That is, the slipperiness between the flanges 1b and 1c and the plate members 2 and 3 is improved, and the superconducting wire constituting the coil 4 can be prevented from moving carelessly. As a result, the occurrence of quenching can be prevented.

Further, the above-described slipperiness improving effect can be obtained by coating the surfaces of the flanges 1b and 1c with a hardly-adhesive polymer material such as PTFE. On the other hand, the slits 2a and 3a of the plate members 2 and 3 can As described above, since the effect of infiltrating the impregnating material (superconducting wire fixing impregnating material) between the superconducting wires is obtained, the effect of increasing the degree of freedom in selecting the material of the plate members 2 and 3 is also obtained.

(Material of plate member)
Here, for example, the plate members 2 and 3 are preferably formed of polyethylene terephthalate (PET) or polyimide. As a result, uneven slip between the flanges 1b, 1c and the plate members 2, 3 whose surfaces are coated with a hardly adhesive polymer material (for example, PTFE) can be suppressed, and the occurrence of quenching can be further prevented. .

According to this configuration, the plate members 2 and 3 and the coil 4 are bonded with the impregnating material (epoxy), but the portion where the slippage occurs is the flange on the side far from the coil 4 and the 1b and 1c plate members 2. 3 is limited. That is, the occurrence of quenching is suppressed (the same applies when the plate members 2 and 3 are formed of FRP (fiber reinforced plastic)).

On the other hand, when the plate members 2 and 3 are formed of polytetrafluoroethylene (PTFE), non-adhesiveness between the plate members 2 and 3 and the coil 4 and non-adhesion between the flanges 1b and 1c and the plate members 2 and 3 are formed. Any adhesiveness can be obtained. That is, when non-adhesiveness between the plate members 2 and 3 and the coil 4 is also obtained to suppress quenching, it is preferable to form the plate members 2 and 3 with polytetrafluoroethylene (PTFE).

  It is also preferable to form the plate members 2 and 3 with a metal having good (large) thermal conductivity such as aluminum and copper. Thereby, the heat | fever generate | occur | produced by the slip between the flanges 1b and 1c and the plate members 2 and 3 can be disperse | distributed by the plate members 2 and 3, and generation | occurrence | production of quench can be prevented more. According to this configuration, the plate members 2 and 3 and the coil 4 are bonded with the impregnating material (epoxy), but the portion where the slippage occurs is the flange on the side far from the coil 4 and the 1b and 1c plate members 2. 3 is limited. That is, the occurrence of quenching is suppressed. Aluminum includes not only pure aluminum, but also aluminum alloys from A1000 to A5000 in accordance with JIS standards. In addition to pure copper, copper includes, for example, copper in the C1000 range according to JIS standards.

  In general, since metal has higher thermal conductivity than resin, even if the plate members 2 and 3 are formed of a metal other than aluminum and copper (nonmagnetic metal), the flanges 1b and 1c and the plate members 2 and 3 It is possible to disperse heat generated by sliding between the two.

1b, 1c, 31b, 31c, 41b, 41c Flange 1a Cylindrical member 1, 102 Winding frame 2a, 3a, 33b, 41cs Slit 2, 3, 22, 32, 33 Plate member 4, 34, 44, 104 Coil 10, 30, 40 Superconducting magnet 21 Impregnation container 22 Vacuum container 23, 24 Tube 33a Fan-shaped plate member 101 Superconducting wire 103 Flow path

Claims (11)

A winding frame having a first flange and a second flange at each end, and a coil made of a superconducting wire wound around the winding frame, and an impregnating material for fixing a superconducting wire between the superconducting wires Is a superconducting magnet that penetrates and solidifies,
A superconducting magnet, wherein a plate member having at least one slit formed so as to be cut inward from an outer edge is sandwiched between the first flange and the coil.   2. A plate member having at least one slit formed so as to be cut inward from an outer edge portion is sandwiched between the second flange and the coil. The superconducting magnet described in 1.   3. The superconducting magnet according to claim 1, wherein the plate member is formed of a polymer material that hardly adheres to the impregnating material for fixing the superconducting wire.   A hard-to-adhere plate made of a polymer material hard to adhere to the superconducting wire fixing impregnation material between at least one of the first flange and the second flange and the plate member The superconducting magnet according to any one of claims 1 to 3, wherein a member is sandwiched or a film of the hardly adhesive polymer material is formed.   A film of a polymer material that is hardly adhesive to the impregnating material for fixing the superconducting wire is formed on a surface of at least one of the first flange and the second flange by a coating process. The superconducting magnet according to claim 1, wherein the magnet is a superconducting magnet.   6. The superconducting magnet according to claim 4, wherein the plate member is made of polyethylene terephthalate or polyimide.   6. The superconducting magnet according to claim 4, wherein the plate member is made of a nonmagnetic metal.   The superconducting magnet according to claim 7, wherein the plate member is made of aluminum or copper.   The superconducting magnet according to any one of claims 3 to 8, wherein the hardly adhesive polymer material is ethylene fluoride or a copolymer thereof.   The superconducting magnet according to claim 9, wherein the hardly adhesive polymer material is polytetrafluoroethylene. A winding frame having a first flange and a second flange at each end, and a coil made of a superconducting wire wound around the winding frame, and an impregnating material for fixing a superconducting wire between the superconducting wires Is a superconducting magnet that penetrates and solidifies,
At least one of the first flange and the second flange has at least one slit formed on the coil-side surface so as to cut inwardly from an outer edge,
A superconducting magnet characterized in that a polymer film having poor adhesion to the superconducting wire fixing impregnation material is formed on the surface of the winding frame.

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