JP3050425B2 - Superconducting coil, manufacturing method thereof and superconducting magnet device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting coil, a method of manufacturing the same, and a superconducting magnet apparatus, and more particularly to a structure for supporting and fixing a superconducting coil in an inner container and a method of manufacturing the same.

[0002]

2. Description of the Related Art A large number of superconducting materials, such as Nb-Ti wires, which are cooled by liquid helium and exhibit a superconducting phenomenon, are generally embedded as fine wires in a stabilizing substrate made of copper or aluminum having a high thermal conductivity. Thereby, it is used as a superconducting material of a multi-core composite material. The superconducting coil is formed by winding this superconducting material in multiple layers, impregnating it with an epoxy resin or the like as an adhesive, and integrating the superconducting material into, for example, a race track shape. When such a superconducting coil is used as a superconducting magnet device, for example, Japanese Unexamined Patent Publication No.
The structure is as described in JP-A-7-63809.

[0003] This conventional example will be described with reference to FIGS. 14 and 15.

FIG. 14 is a plan view showing a main part of a conventional superconducting magnet device, and FIG. 15 is a sectional view taken along line AA of FIG. The superconducting coil main body 1 is disposed in a container containing a cryogenic refrigerant such as liquid helium, that is, in an inner container 2 via a support fixing member 3 arranged at a predetermined interval in the length direction of the superconducting coil main body 1. It is supported and fixed in an electrically insulated state. The inner container 2 containing the superconducting coil main body 1 is not shown, but is contained in a heat-insulating outer container to constitute a superconducting magnet device. The supporting and fixing member 3 is made of a superconducting coil using an insulating cloth 5 and a heat insulating member 4 formed by coating an insulating material such as tetrafluoroethylene having a small wear coefficient and thermal conductivity on a part of a metal plate such as stainless steel or aluminum. It is attached to the outer periphery of the main body 1, is impregnated with a synthetic resin 6 such as an epoxy resin, and is integrally formed, so that the coated insulating material of the heat insulating member 4 comes into contact with the inner wall surface of the inner container 2.

[0005] Since the conventional superconducting magnet device has the above-described configuration, when the superconducting coil main body 1 is energized and tries to deform due to its own electromagnetic force or the like, the heat insulating member 4 is coated. Insulation material and inner container 2
Slip occurs during the heat generation and frictional heat is generated. However, the coated insulating material has a small friction coefficient, so that the amount of frictional heat generated is reduced. It is said that there is an advantage that it can be prevented from entering the side.

[0006]

However, copper, aluminum, stainless steel and the like and epoxy resin are used as shown in FIG.
As shown in FIG. 3, since the thermal contraction amount is largely different due to the difference in the linear expansion coefficient, the heat load repeatedly applied between normal temperature and cryogenic temperature causes the heat insulating member 4 to be made of stainless steel, copper, or the like. There is a risk that peeling may occur between the metal plate and the synthetic resin 6 such as an impregnated epoxy resin, or between the synthetic resin 6 and the exposed surface of the stabilizing base made of copper or aluminum of the superconducting coil body 1. . When this peeling occurs, slipping occurs at the peeling portion, and the frictional heat generated by the slipping is caused by the coating insulating material of the heat insulating member 4 having a small thermal conductivity at a position in contact with the inner wall surface of the inner container 2. As a result, the superconducting coil body 1 is not diffused into the inner container 2 but penetrates into the superconducting coil main body 1 to increase the temperature thereof. When the temperature of the superconducting coil main body 1 exceeds the critical temperature, its superconducting state is impaired. Would.

Therefore, the object of the present invention is to
It is an object of the present invention to provide a superconducting coil capable of reducing the frictional heat penetrating into a superconducting coil main body, a method for manufacturing the same, and a superconducting magnet device.

[0008]

According to the present invention, in order to achieve the above object, a supporting and fixing member provided on an outer periphery of a superconducting coil body at a predetermined interval in a longitudinal direction thereof is provided with a heat insulating member.
The heat insulating member provided with the spacer is impregnated with an adhesive, for example, an epoxy resin or the like, to a core material made of an electrical insulating material having a low thermal conductivity and excellent abrasion resistance, such as a polyimide tape, an aramid fiber tape, and a glass tape. And integrated on the outer periphery of the superconducting coil body,
Characterized in that the pacer is provided on the outer periphery of the heat insulating member, and
The spacer includes a plurality of divided pieces,
These divided pieces are superposed on the outer periphery of the heat insulating member.
While pressing the heat insulation member to compress the heat insulation member.
And a masking tape is applied to both sides of a portion where the heat insulating member is provided on the outer periphery of the superconducting coil body, and then a core material made of an electric insulating material is superconducted. A superconducting coil is manufactured by providing an outer periphery of a coil main body, impregnating it with an adhesive and integrating the same to form a heat insulating member, and then removing a masking tape.

[0009]

According to the present invention, as described above, as the core material of the heat insulating member constituting the support and fixing member of the superconducting coil body, an electric insulating material whose heat shrinkage is not so different from that of the impregnated adhesive is used. The use of a metal plate such as stainless steel or copper, which has a large difference in heat shrinkage, prevents the heat insulation member from peeling even when a thermal load is applied, and prevents the generation of frictional heat due to sliding in this area. At the same time, since the electrical insulating material used as the core material of the heat insulating member has a low thermal conductivity, it is closer to the storage container than the heat insulating member , for example,
Even if frictional heat due to sliding occurs between the
The heat of friction can be prevented from entering the superconducting coil body by the heat insulating member. Spacers are divided into multiple
Divided into pieces, and these divided pieces are
Heat insulation member by pressing against the superconducting coil body side at the outer periphery of the material
The opposite part was welded while compressive load was applied to
Slip between the heat insulating member and the spacer due to vibration, etc.
To prevent frictional heat from being generated
The superconducting core prevents loosening due to heat shrinkage of the material.
The il body can be firmly supported and fixed.

Further, according to the present invention, since the heat insulating member is formed after applying the masking tape to both sides of the portion where the heat insulating member is provided on the outer periphery of the superconducting coil main body as described above, the outer peripheral portion of the superconducting coil main body located on both sides of the heat insulating member is provided. This prevents the impregnated adhesive from flowing out and adhering to the layer, thereby forming a layer of only the adhesive. If the impregnated adhesive flows out to the outer periphery of the superconducting coil main body and a layer of only the adhesive is formed, the amount of heat shrinkage of the epoxy resin used as the adhesive is extremely large as shown in FIG. There is a risk that cracks or peeling may occur in the adhesive layer due to a load, and in the worst case, slipping may occur due to peeling on the surface of the superconducting coil body, and frictional heat may be generated. It is extremely important to prevent the impregnating adhesive from flowing out to the outer peripheral portion of the superconducting coil main body when configuring the heat insulating member as described above.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a main part of a superconducting magnet device according to one embodiment of the present invention, and is a sectional view taken along line BB of FIG. 2 including an inner container, and FIG. It is a top view which shows a coil part. In these figures, reference numeral 1 denotes a superconducting coil main body, which is formed by tightly winding a multi-core composite superconductor while applying tension with an insulating material such as glass cloth interposed between layers, so that a cross section perpendicular to the length direction becomes substantially rectangular. As described above, a rigid track is formed by impregnating and integrating a synthetic resin adhesive such as an epoxy resin in a state of being firmly fixed with a formwork. A superconducting coil is formed by attaching support fixing members 3 having a predetermined width at intervals. The supporting and fixing member 3 includes a heat insulating member 7 and a spacer 8, and the heat insulating member 7 of this embodiment is made of an electric insulating material having a small thermal conductivity and excellent wear resistance, for example, a polyimide having a thickness of about 50 μm. A tape, an aramid fiber tape, a glass tape, or a material obtained by bonding these materials is wound around the outer periphery of the superconducting coil body 1 as a core material, and is impregnated with an adhesive made of a synthetic resin such as an epoxy resin to be integrated with the superconducting coil body 1. It is composed. The above-mentioned electric insulating tape constituting the heat insulating member 7 is tightly wound while applying tension, and an adhesive is applied to the tape at the time of this winding, or the adhesive is impregnated into the tape after the winding and pressed from around with a jig. By solidifying in the state, the heat shrinkage amount of the heat insulating member 7 can be approximated to the heat shrinkage amount (curve NbTi) of the superconducting coil main body 1 as shown by a curve G in FIG. The step of forming the heat insulating member 7 can be performed simultaneously with the formation of the superconducting coil body 1. The spacer 8 provided on the outer periphery of the heat insulating member 7 is composed of two divided pieces 8A and 8B having an L-shaped cross section narrower than the heat insulating member 7, and corresponds to the contraction of the superconducting coil main body 1 due to the cryogenic refrigerant. In order to apply a compressive load to the superconducting coil main body 1 side, the two divided pieces 8A, 8B are pressed from above, below, right and left in a direction approaching each other to compressively elastically deform, and in this state, the opposing portions of the two divided pieces 8A, 8B Are firmly fixed by welding. Reference numeral 9 denotes this weld. As a material of the spacer 8, a composite material in which a stainless steel plate 10 and a copper plate 11 are press-bonded in a high-temperature vacuum and diffusion-bonded is used, and the copper plate 11 having extremely large thermal conductivity comes to a surface in contact with the heat insulating member 7. Placed in By providing the inner container 2 made of stainless steel, which is a non-magnetic material, on the outer periphery of the spacer 8, the superconducting coil body 1 is housed in the inner container 2 via the support fixing member 3, and the cryogenic refrigerant therein is contained. The superconducting magnet device is constructed by being entirely cooled in an insulated outer container (not shown). Reference numeral 12 denotes a passage for the cryogenic refrigerant formed between the inner container 2 and the corner of the spacer 8. Like the spacer 8, the inner container 2 also has two divided pieces 2A and 2 having an L-shaped cross section.
B and are formed by welding opposing portions of both divided pieces 2A and 2B in a state where they are compressed and elastically deformed similarly to the divided pieces 8A and 8B of the spacer. Reference numeral 13 denotes this weld.

In the superconducting magnet device thus constructed, the superconducting coil main body 1 is energized, and the superconducting coil main body 1 is going to be deformed by its own electromagnetic force, or the heat is repeated between normal temperature and cryogenic temperature. Slip may occur when a load is applied to cause a large difference in the amount of heat shrinkage between components. However, since the heat shrinkage of the heat insulating member 7 of this embodiment is close to the heat shrinkage of the superconducting coil main body 1 as described above, peeling and slipping do not occur between the superconducting coil main body 1 and the heat insulating member 7. . Therefore, the places where the slip may occur are between the heat insulating member 7 and the spacer 8 and between the spacer 8 and the inner container 2. However, even in the latter case, even if slippage occurs and frictional heat is generated, this portion is separated from the superconducting coil main body 1 and the polyimide constituting the core material of the heat insulating member 7 located on the superconducting coil main body 1 side from this position. Since the thermal conductivity of the tape (P), the aramid fiber tape (A), the glass tape (G), etc. is small as shown in FIG. 12, the frictional heat entering the superconducting coil main body 1 side is significantly reduced, and the thermal conductivity is reduced. No adverse effects. Also, in the case where slip occurs and frictional heat occurs in the former, the heat insulating member 7 having a small thermal conductivity exists on the side of the superconducting coil main body 1 from that location, and the portion of the spacer 8 which is in contact with the heat insulating member 7. Is provided with a copper plate 11 having a high thermal conductivity, so that frictional heat is applied to the spacer 8 on the opposite side of the superconducting coil body 1.
The superconducting coil main body 1 is not adversely affected by heat.

Next, a method for forming the heat insulating member 7 on the outer periphery of the superconducting coil main body 1 will be described with reference to FIGS. These drawings correspond to the cross-sectional view taken along line CC of FIG.

First, as shown in FIG. 3, a dummy mold 14 having the same shape as the heat insulating member 7 and divided in the circumferential direction so as to be attachable and detachable to and from the outer periphery of the superconducting coil body 1 is heat-insulated on the outer periphery of the superconducting coil body 1. It is arranged at the part where the member 7 is provided,
Next, as shown in FIG. 4, an adhesive tape 15 is applied to both sides of the dummy mold 14, and a masking process is performed so that the adhesive does not enter the outer peripheral surface of the superconducting coil main body 1. After the molds 16 divided in the circumferential direction so as to be detachable are attached to each other, the dummy mold 14 is removed as shown in FIG. Thereafter, as shown in FIG. 6, an electric insulating material is applied to the outer peripheral portion of the superconducting coil main body 1 from which the dummy mold 14 has been removed, while applying an adhesive made of the same synthetic resin as the impregnating adhesive of the superconducting coil main body 1 such as epoxy resin. The heat insulating member 7 is formed by curing the adhesive while the outer periphery thereof is pressed by the backing plate 17. As the electric insulating material, a tape having a low thermal conductivity and excellent abrasion resistance, such as a polyimide tape, an aramid fiber tape, a glass tape, or a tape to which these are adhered, is wound while applying tension. Turn. Finally, as shown in FIG. 7, the backing plate 17, the mold 16 and the adhesive tape 15 are removed.

According to such a molding method, the heat insulating member 7
Flows out to the outer peripheral portion of the superconducting coil body 1 on both sides of the impregnated adhesive, and as shown by a broken line in FIG.
8 can be prevented from being formed, and the shape of the heat insulating member 7 can be accurately formed and integrated with the superconducting coil main body 1 and fixed.

The method of mounting the spacer 8 on the heat insulating member 7 will be described in detail with reference to FIG. Section L of spacer 8
In the opposing portions of the two split pieces 8A and 8B, for example, in the upper left portion of the figure, the opposing portion of one split piece 8A has a straight cut surface, while the other split portion has a straight cut surface. A stepped portion 19 is formed in the facing portion of the piece 8B, and a gap g is provided between the two. Therefore, the two divided pieces 8A and 8B are positioned by the stepped portion 19, and are compressed and elastically deformed by utilizing the gap g. In this state, the opposed portions can be welded. During this welding, the stepped portion 19 serves to prevent the arc or the molten metal from entering the heat insulating member 7 and damaging it. Further, when welding is performed in a state of being compressed and elastically deformed as described above, slippage occurs between the heat insulating member 7 and the spacer 8 due to vibration or the like, resulting in friction.
Kosunetsu prevented from occurring, and an anti-Ide superconducting coil body and that the resulting slack Te cowpea the thermal contraction of the members due to cooling
Can be firmly supported and fixed . After welding, the divided pieces 8A and 8B are machined so that the outer peripheral surface thereof uniformly contacts the inner container 2.

FIG. 10 shows an experimental method for verifying the effectiveness of the above-described embodiment. A heat insulating member 7 having a thickness of about 1 mm is wound around and fixed to the outer periphery of the superconducting coil main body 1, and a spacer 8 made of a stainless steel block provided with a copper plate inside liquid helium (4.2K) is provided on both sides of the heat insulating member. 7 and pressed at a surface pressure of about 25 MPa, a load F is applied to the superconducting coil body 1 so that a sliding displacement of about ± 500 μm occurs in the vertical direction, and the copper plate of the spacer 8 and the superconducting coil are superposed using the thermocouples 20A and 20B. The temperature of the exposed surface of the superconductor of the coil body 1 was measured, and the heat penetration rate was determined from the temperature in the steady state. The results are shown as a table in FIG.

As can be seen from the table of FIG. 11, according to the present embodiment, the rate of heat penetration into the superconducting coil main body 1 could be limited to a very small value. In the table of FIG. 11, P (A) is a polyimide tape backed and reinforced with an aramid fiber tape, P (G) is a polyimide tape backed and reinforced with a glass tape, and A and G are aramid fiber tapes and glass. Show the tapes respectively. Further, when the contact surface and the like were observed at room temperature after the repetition test was performed about 1,000 times, no seizure, cracking or peeling of the heat insulating member 7 was found.

FIG. 9 shows a main part of a superconducting coil according to another embodiment of the present invention, and corresponds to a cross-sectional view taken along line CC of FIG. In this embodiment, the heat insulating member 7 is formed on the outer periphery of the superconducting coil main body 1 in the same manner as in the previous embodiment, and the spacer 8 is provided on the outer periphery of the heat insulating member 7. The width of the copper plate 11 having a large thermal conductivity is larger than the width of the stainless steel member 10 located outside the spacer 8. Therefore, in addition to the effects of the previous embodiment, the area of the copper plate 11 in contact with the cryogenic refrigerant is further increased, and even if frictional heat is generated due to slippage, heat diffusion from the copper plate 11 is promoted and the superconducting coil is increased. Heat intrusion into the main body 1 can be further reduced.

In each of the above embodiments, copper is used as the material of the member having a high thermal conductivity located inside the spacer 8. However, copper is a soft metal, and is worn and damaged due to long-term use. Therefore, the entire spacer 8 may be made of high-strength aluminum which is harder than copper and has almost the same thermal conductivity as copper. In this case, the specific gravity of aluminum is small. Not only can the superconducting coil be reduced in weight, but also aluminum (Al) can be made of stainless steel (SUS) as shown in FIG.
Since the heat shrinkage is larger than that of copper or copper (Cu), a spacer 8 made of high-strength aluminum is provided on the outer periphery of the heat insulating member 7 and cooled by a cryogenic refrigerant. And tighter tightening than in the case where the spacer is manufactured in the above-described manner, so that the slip between the superconducting coil body 1 and the heat insulating member 7 and between the heat insulating member 7 and the spacer 8 can be prevented well. Can also.

[0022]

As described above, according to the present invention, the supporting and fixing member provided on the outer periphery of the superconducting coil main body at a predetermined interval in the length direction is provided with the heat insulating member and the spacer.
In addition, the heat insulating member is configured by impregnating and integrating an adhesive into a core material made of an electrical insulating material having a small thermal conductivity and excellent wear resistance and providing it on the outer periphery of the superconducting coil body,
Since the spacer is provided on the outer periphery of the heat insulating member so that the amount of heat shrinkage of the core material and the impregnating adhesive constituting the heat insulating member does not differ so much, the heat insulating member does not peel even when a heat load is applied, In addition to preventing the generation of frictional heat due to slipping in this part, the electrical insulation material used as the core material of the heat insulating member has low thermal conductivity, so even if frictional heat due to slipping occurs on the storage container side than the heat insulating member The heat of friction can be prevented from entering the superconducting coil body by the heat insulating member. In addition, the spacer is
These split pieces are placed on the outer periphery of the heat insulating member.
Pressure on the superconducting coil body side and compressive load on the heat insulating member
The opposite part was welded with
As a result, slippage occurs between the heat insulating member and the spacer, causing friction
Prevents the generation of heat and prevents heat shrinkage of each member due to cooling
Therefore, the superconducting coil body is
It can be completely supported and fixed. Further , after applying a masking tape to both sides of a portion where the heat insulating member is provided on the outer periphery of the superconducting coil main body, a core material made of an electric insulating material is provided on the outer periphery of the superconducting coil main body, and an adhesive is impregnated with the core material to be integrated. Since the superconducting coil was manufactured by removing the masking tape,
It is possible to prevent the impregnated adhesive from flowing out and adhering to the outer peripheral portions of the superconducting coil main body located on both sides of the heat insulating member, thereby preventing a layer of only the adhesive from being formed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a superconducting magnet device according to one embodiment of the present invention.

FIG. 2 is a plan view of a superconducting coil according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing steps of a method for manufacturing a superconducting coil according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view showing steps of a method for manufacturing a superconducting coil according to one embodiment of the present invention.

FIG. 5 is a cross-sectional view showing steps of a method for manufacturing a superconducting coil according to one embodiment of the present invention.

FIG. 6 is a cross-sectional view showing steps of a method for manufacturing a superconducting coil according to one embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a state after a final step of a method for manufacturing a superconducting coil according to one embodiment of the present invention.

FIG. 8 is a sectional view showing details of a method of attaching a spacer to the outer periphery of the heat insulating member.

FIG. 9 is a sectional view of a superconducting coil according to another embodiment of the present invention.

FIG. 10 is a perspective view showing an experimental method for verifying the effectiveness of the superconducting coil according to one embodiment of the present invention.

FIG. 11 is an explanatory diagram showing the verification result.

FIG. 12 is a characteristic diagram showing the thermal conductivity of each constituent material.

FIG. 13 is a characteristic diagram showing the amount of heat shrinkage of each constituent material.

FIG. 14 is a plan view showing a conventional superconducting magnet device.

FIG. 15 is a sectional view taken along line AA of FIG. 14;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Superconducting coil main body 2 Inner container 3 Support fixing member 7 Heat insulating member 8 Spacer 8A, 8B L-shaped cross section piece

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadashi Sonobe 4-6-6 Kanda Surugadai, Chiyoda-ku, Tokyo Inside Hitachi, Ltd. (72) Inventor Fumio Suzuki 4-6-1 Kanda Surugadai, Chiyoda-ku, Tokyo Hitachi (56) References JP-A-57-630809 (JP, A) JP-A-60-177606 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01F 6/00 ZAA H01F 6/06 H01F 41/12

Claims (8)

(57) [Claims] A superconducting coil is wound in multiple layers and impregnated with an adhesive. The superconducting coil is electrically insulated from the container at a predetermined length in the outer circumference of the coil body. In a superconducting coil provided with a supporting and fixing member having a heat insulating member for performing
The above-mentioned superconducting coil is provided with a spacer in addition to the material, and the above-mentioned heat-insulating member is formed by impregnating and integrating an adhesive into a core material made of an electrical insulating material having low thermal conductivity and excellent wear resistance.
Provided on the outer periphery of the body, and the spacer
A superconducting coil provided on the outer periphery of a material . 2. A multi-layered superconductor is wound with an adhesive.
The length of the superconducting coil body
At predetermined intervals in the direction
A support fixing member having a heat insulating member for insulation is provided.
In the superconducting coil, the supporting and fixing member is
In addition to the material, a spacer is provided, and the heat insulating member is electrically insulated.
Impregnated with an adhesive into a core material consisting of
It is provided on the outer periphery of the superconducting coil body and
Is composed of a plurality of divided pieces.
The split piece is placed on the outer periphery of the heat insulating member and the superconducting coil
Pressing to the body side and applying a compressive load to the heat insulating member
A superconducting coil characterized in that its opposing portions are welded . 3. The storage container according to claim 1, wherein the storage container comprises a plurality of divided pieces.
And place these divided pieces on the outer periphery of the spacer.
Pressing to the superconducting coil body side and compressing load to the above spacer
A superconducting coil characterized in that the opposing portion is welded in a state in which is added . 4. The electrical insulating material according to claim 1, wherein the electrical insulating material is a polyimide tape or aramid.
At least one of fiber tape and glass tape
A superconducting coil characterized by using a tape made of a conductive material . 5. The superconducting coil body according to claim 1, wherein the electric insulating material has a tension on the outer periphery of the superconducting coil body.
A superconducting coil comprising an electrically insulating tape wound while adding a superconductor. 6. A multi-layered superconductor is wound with an adhesive.
The length of the superconducting coil body
Electrically with respect to the container at predetermined intervals in the direction
A support fixing member having a heat insulating member for insulation is provided.
In the method for manufacturing a superconducting coil, the superconducting coil
Mark on both sides of the part where the heat insulating member is provided on the outer circumference of the body.
After applying the taping tape, remove the core made of electrical insulating material.
Provided on the outer periphery of the superconducting coil body, impregnated with adhesive
Integrate to form the heat insulation member, and then
Of the superconducting coil characterized by removing the sealing tape
Production method. 7. A multi-layered superconductor is wound with an adhesive.
The length of the superconducting coil body
Fixed with a heat insulating member at predetermined intervals in the vertical direction
A superconducting coil with components and a cryogenic refrigerant
One of the above-mentioned superconducting coils is electrically
And a storage container that is insulated and supported inside.
In the magnet guide device, the supporting and fixing member may be the heat insulating member.
In addition, a spacer is provided, and the heat insulating member is
For core material made of small and highly wear-resistant electrical insulation
The above-mentioned superconducting coil body which is integrally formed by impregnating with an adhesive
And the spacer is provided on the heat insulating member.
A superconducting magnet device provided on the outer periphery of the superconducting magnet. 8. A support fixing member having a heat insulating member is provided at predetermined intervals in the length direction on the outer periphery of a superconducting coil body obtained by winding a superconductor in multiple layers and impregnating the superconductor with an adhesive. and a superconducting coil, a built-in cryogen, and the superconducting magnet device provided with a container that supports fixed inside electrically insulating through the supporting and fixing member the superconducting coil, the support fixed member Is the heat insulation member
In addition to the above, a heat insulating member is provided with a spacer
The core material consisting of
Provided on the outer periphery of the conductive coil body and the spacer
Consists of a plurality of divided pieces.
Place the piece on the outer periphery of the heat insulating
Pressing against the body side and applying a compressive load to the heat insulating member,
A superconducting magnet device characterized in that the opposing portions are welded .