JPH07161520A - Superconducting magnet - Google Patents

Abstract

PURPOSE:To provide a superconducting magnet comprising first and second coil groups having respective bobbins combined integrally in which the generation of uneven field is inhibited by preventing the positional shift of coils and eliminating the welding distortion from the bobbin when the bobbins are integrated. CONSTITUTION:The superconducting magnet comprises a first bobbin 7 wherein a first superconducting coil group 1 is wound around a first cylindrical drum part having flange parts at the opposite ends, and a second bobbin 8 wherein a second supeconducting coil group 3 is wound around a second drum part having larger diameter than the first bobbin with flange parts being provided at the opposite ends. The first bobbin 7 is inserted into the second bobbin 8 and the fitting part is welded to integrate the bobbins thus constituting a part of a helium tank. The fitting part has different diameters on the opposite end sides and the flange parts 8b, 8c are provided with reinforcing parts 9, 10 with respect to a drum part 8a and a part of the reinforcing part forms a positioning part 9a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting magnet device used in, for example, a medical magnetic resonance diagnostic apparatus, and more particularly to improvement of a winding frame forming a part of a helium tank.

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional view of an essential part showing a structure in which a winding frame is integrated in a conventional superconducting magnet device of this type. In the figure, 1 is a cylindrical superconducting coil 1a-1c.
A superconducting first coil group 2 composed of a cylindrical body portion 2a
The superconducting first coil group 1 is wound around and the flange portions 2 are attached to both ends.
Reference numeral 2d denotes a support portion in the axial direction of the superconducting first coil group 1, which is a first winding frame on which b and 2c are formed. Reference numeral 3 denotes a superconducting second coil group composed of cylindrical superconducting coils 3a and 3b arranged substantially concentrically outside the superconducting first coil group 1, and 4 denotes a body portion 2.
A second winding frame in which a superconducting second coil group 3 is wound around a body portion 4a having a diameter larger than a and flange portions 4b and 4c are formed on both ends, and 4d indicates an axial supporting portion of the superconducting second coil group 3. .
Reference numeral 5 is a welded portion of the flange portions 2b and 4b and 2c and 4c, and the respective diameters D ₁ and D ₂ of the welded portion 5 are substantially equal. 6 is a flange 4
The outer cylinder is welded to the outer peripheral edges of b and 4c. In addition,
X represents the axis of the coil group, and Y represents the center plane of the superconducting magnet perpendicular to the axis X of the coil group. Such superconductivity 1st
The coil group 1 and the superconducting second coil group 3 are usually in the center plane Y.
They are arranged symmetrically with respect to. As a process of constructing the superconducting magnet device configured as described above, first, the first winding frame around which the superconducting coil is wound and the second winding frame are combined and positioned so as to be concentric, and then the winding frame is integrated. Welding of the welded portion 5 is performed. The outer cylinder 8 is welded to the integrated winding frame to complete the most important helium tank that constitutes the superconducting magnet.

Next, the operation will be described. In the vicinity of the origin (γ and θ are 0) which is the target area of the superconducting magnet device, the first superconducting first coil group having the coil radius a1 makes
The magnetic field is Bz1 (γ, θ) = Bz1 (0,0) {1 + ε1 (γ / a1) P1 (u) + ε2 (γ / a1) ² P2 (u) + ε3 (γ) using the Legendre function Pn (u). / A1) ³ P3 (u) + ...} (1) Similarly, the coil radius is a2, and the second magnetic field produced by the superconducting second coil group is Bz2 (γ, θ) = Bz2 (0,0) {1 + ε1 (γ / a2) P1 (u) + ε2 (γ / a2) ² P2 (u) + ε3 (γ / a2) ³ P3 (u) + ...} (2) Usually, both the first coil group and the second coil group are composed of coils symmetrically arranged with respect to the center plane, so that in the equations (1) and (2), odd-order terms (ε1, ε3 ... ) Can be regarded as zero in both the first magnetic field and the second magnetic field. Each coil forming the first coil group and the second coil group generates a uniform magnetic field in the vicinity of the origin, and therefore even-order terms (ε2,
ε4 ...) will be almost zero when superposed,
Design the coil shape, placement and ampere turns. However, at the time of manufacturing the magnet, the superconducting first coil group and the second coil group are integrated with great care so that they are concentric and coaxial. In the case of a superconducting magnet, the bobbin also acts as a helium tank filled and held with liquid helium for keeping the coil in a superconducting state. Therefore, when the reels are integrated, the flange portions 2b, 2c of the first reel and the flange portions 4b, 2b of the second reel, as shown in FIG.
4c is joined to the portion indicated by the welded portion 5 having high reliability against leakage.

[0004]

Since the conventional superconducting magnet device is constructed as described above, first, the reels are assembled so as to be concentric, the positioning is performed, and then,
Welding is performed to integrate the superconducting first coil group and the superconducting second coil group into the winding frame. At this time, the heat of welding causes distortion in the flange portion 2b of the first reel, the flange portion 4b of the second reel and the reel body portions 2a, 4a as shown in FIG. Although FIG. 6 shows only the strain at the reel joint portion on one side with respect to the center plane, the same occurs at the other joint surface. The superconducting coil 1a forming the superconducting first coil group and the superconducting coil 3a forming the superconducting second coil group are displaced in the radial direction due to the distortion of the reel body portions 2a and 4a, and as a result, (1) and The non-uniform magnetic field, which is different from the design value, in the zero-order and subsequent magnetic field components represented by the formula (2) is generated, and the uniformity in the magnetic field generation target region is lost. For example, in a superconducting magnet design with a magnetic field output of 15000 Gauss in the target area, the coil winding radii of the superconducting first coil group and the superconducting second coil group are each a1 = 580.
mm, a2 = 820 mm, generally 50 cm
The required uniformity in the virtual sphere (DSV) is 10ppm
While it is said that the reel body portions 3a, 4
When a welding strain occurs in a and a strain amount of 1 mm occurs in the coil winding radius, a large nonuniform magnetic field component is generated as shown in the table of FIG. 7, and the uniformity in the target region reaches 300 to 400 ppm. Therefore, there is a problem that it becomes difficult to achieve the required uniformity. Further, in the combination of the first winding frame and the second winding frame, the diameter D1 of the welded portion 5 of the flanges 2b and 4b and the diameter D2 of the welded portion of the flanges 2c and 4c are substantially equal, and axial positioning is difficult. There has been a problem that the first coil group and the second coil group are displaced from each other concentrically, a non-uniform magnetic field is generated, and the uniformity is adversely affected. Further, a coil 1 in which superconducting wires are wound in an array so as to form a rectangular cross section
In a and 3a, as shown in FIG. 6, due to welding distortion, the coil cross-sectional shape becomes non-rectangular, and the superconducting wire rod is misaligned. This causes the superconducting wire to make a slight movement (micro-slip) due to the electromagnetic force acting on the coil during excitation, and the friction heat generated by this micro-slip raises the temperature of a part of the superconducting wire and destroys the superconducting state, causing the entire superconducting magnet to break. There was a problem that could be one of the factors that cause the quench.

The present invention has been made in order to solve the above problems, and when the winding frames of the superconducting first coil group and the superconducting second coil group are integrated, the coil position shift and the winding are prevented. An object of the present invention is to obtain a superconducting magnet device with high uniformity and in which quenching is unlikely to occur by preventing the generation of an inhomogeneous magnetic field component by making the frame body structure free from the influence of welding distortion.

[0006]

[Means for Solving the Problems] Claim 1 according to the present invention
The superconducting magnet device of No. 1 has a first winding frame in which flange portions are formed at both ends of a cylindrical first body portion, and a superconducting first coil group including a cylindrical superconducting coil is wound around the first body portion; Cylindrical superconducting cylinder having a larger diameter than the frame and having a flange portion that fits the flange portion of the first winding frame formed at both ends of the cylindrical second superconducting portion and arranged concentrically with the superconducting first coil group in the second body portion. A second winding frame formed by winding a superconducting second coil group including a coil, the first winding frame is inserted inside the second winding frame, the combination fitting portion is welded, and the two winding frames are integrated to form helium. In the superconducting magnet device configured to form a part of the tank, the flange portion has different diameters of the fitting portion on both end sides, and at least one flange portion of both reels has a corresponding body portion. The flange part that has a reinforcing part on the part And forms a positioning portion abutting the inner surface.

According to a second aspect of the present invention, in a superconducting magnet device, flange portions are formed at both ends of a cylindrical first body portion, and a first superconducting first coil group including a cylindrical superconducting coil is wound around the first body portion. A first winding frame, and a flange portion that fits into the flange portion of the first winding frame is formed at both ends of a cylindrical second body portion having a diameter larger than that of the first winding frame, and a superconducting first coil group is formed in the second body portion. A second winding frame formed by winding a superconducting second coil group composed of concentric cylindrical superconducting coils, and inserting the first winding frame inside the second winding frame to weld the combined fitting portion. In the superconducting magnet device in which both reels are integrated to form a part of the helium tank, the fitting part of the flange part has different fitting diameters at both ends, and The convex side meshing part that protrudes in a ring shape from the inner surface and the above convex on the back side. The engaging portion is formed of a concave engaging portion that has a ring-shaped groove that fits and that protrudes from the inner side surface, and when the engaging portions are engaged, a positioning portion that partially abuts in the axial direction is formed. It is a thing.

Further, in the superconducting magnet device according to a third aspect of the present invention, the first winding frame is formed by forming flange portions on both ends of a cylindrical body portion and projecting ring-shaped support seats on inner surfaces of the flange portion facing each other. , A first superconducting first coil group consisting of a cylindrical superconducting coil wound around a first winding frame body portion, and a body portion divided into at least two saddle-like bodies along the support seat between the flange portions. A second winding frame which is attached and has a cylindrical shape,
A second winding frame body part, and a superconducting first coil group consisting of a cylindrical superconducting coil wound concentrically with the first superconducting coil group, and both winding frames forming part of a helium tank Is.

[0009]

In the superconducting magnet device according to the first aspect of the present invention, when both reels are integrated, different fitting diameters at the flange portions at both ends facilitate assembly, and the flange portion is reinforced by the reel body portion. It reduces the effect of welding distortion and enhances the positioning accuracy of the superconducting coil group.

According to the second aspect of the present invention, when the two bobbins are integrated, the meshing portions formed on the fitting portion of the flange portion and having different diameters facilitate the assembling of the bobbins. The reinforcement of the flange portion reduces the influence of welding distortion of the reel body portion and enhances the positioning accuracy of the superconducting coil group.

Further, in claim 3, the divided winding frame inserted between the flange portions of the winding frame is fixed to the winding frame by the superconducting second coil group around which the divided winding frame is wound, and the two winding frames are integrated without welding. .

[0012]

EXAMPLES Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is a sectional view of a main part showing a winding frame integrated structure of a superconducting magnet device according to a first embodiment of the present invention. In the figure, 1, 3, 6, X and Y are the same as the conventional ones, and the explanation thereof is omitted. Reference numeral 7 is a first winding frame in which the superconducting first coil group 1 is wound around a cylindrical first body portion 7a and flange portions 7b and 7c having different outer diameters are formed at both ends, and 7d is an axial direction of the superconducting first coil group. The support part of is shown. 8 is the first
The second superconducting second coil group 3 is wound around the second body portion 8a having a diameter larger than that of the body portion 7a, and the flange portions 8b and 8c are formed at both ends to fit the outer diameters of the flange portions 7b and 7c, respectively. Reference numeral 8d on the winding frame indicates a support portion in the axial direction of the superconducting second coil group 3. Reference numeral 9 is a reinforcement portion on one side provided on the second reel, and a plurality of the body portion 8a and the flange portion 7b are welded at an arbitrary pitch and the flange portion 7 of the first reel is provided.
It has a positioning portion 9a that abuts the inner surface of b. Reference numeral 10 is a reinforcing portion on the other side provided on the second winding frame, which is the second body portion 8
Plural pieces are welded at an arbitrary pitch between a and the flange portion 7c. 11a is a welded portion of both reels having a fitting diameter D ₃ ;
b is a welded portion of both reels having a fitting diameter D ₄ .

Next, the operation will be described. When combining the first winding frame wound with the superconducting first coil group with the second winding frame wound with the superconducting second coil group, the first winding frame flange portion 7c side and the second winding frame flange portion 8b side When the combination is done, the flange diameter of the reel is D ₃ > D ₄ , and the insertion work can be performed easily. In addition, when the coil is positioned, a part of the reinforcing portion 9 on the second winding frame 8b side is used as the positioning portion 9a, so that the combination can be performed more accurately than in the past. Next, when performing integral welding, the reinforcing portions 9 and 10 increase the mechanical strength of the flange portions 7b, 7c, 8b and 8c and the second body portion 8a, and the welding distortion is reduced. Therefore, welding distortion does not reach the reel body portions 7a and 8a. Therefore, the coils 1a and 3a do not cause a positional deviation due to welding distortion, have a predetermined coil shape and arrangement, and can prevent generation of a non-uniform magnetic field component due to welding distortion. Also, the coils 1a, 3
It is also possible to prevent the superconducting wire of (a) from being misaligned, and it becomes difficult for microslip to occur due to the electromagnetic force acting on the coil during excitation.
Therefore, it is possible to obtain the superconducting magnet device in which the generated magnetic field uniformity in the target region is high and the quenching hardly occurs. In this embodiment, the flange portion of the second reel is reinforced, but the first body portion of the first reel has a mounting space for reinforcement to reinforce the flange portion of the first reel. You may do it.

Example 2. A second embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a cross-sectional view of essential parts showing a winding frame integrated structure of a superconducting magnet device according to Embodiment 2 of the present invention. In the figure, the same reference numerals as those in FIG.
And its description is omitted. 12 is a cylindrical first
A first superconducting first coil group 1 is wound around a body portion 12a, and flange portions 12b and 12c having different outer diameters are formed at both ends.
On the outer peripheral side of the flange portion 12b of the winding frame, the convex side engaging portion 12d protruding in a ring shape from the inner side surface is provided on the flange portion 1
The outer peripheral side of 2c has a ring-shaped groove on the back side and forms a concave side engaging portion 12e protruding from the inner side surface. A superconducting second coil group 3 is wound around a second body portion 13a having a diameter larger than that of the first body portion 12a, and flange portions 13b and 13c are provided at both ends.
In the second winding frame in which the first winding frame 12 is formed, the inner peripheral side of the flange portion 13b projects from the inner side surface to form a ring-shaped groove.
The concave side meshing portion 13d that meshes with the convex side meshing portion 12d of the flange 13c protrudes in a ring shape from the inner side surface of the flange portion 13c and meshes with the concave side meshing portion 12e of the first winding frame 12 It forms part 13e. Reference numeral 14 is a positioning portion formed by the meshing portions 12e and 13e contacting each other in the axial direction. Note D ₅ is the insertion side minimum diameter of the second winding frame 13 D ₆
Indicates the maximum insertion side diameter of the first winding frame 12.

Next, the operation will be described. When the second winding frame 13 wound by the superconducting second coil group 3 is combined with the first winding frame 12 wound by the superconducting first coil group 1,
The first reel frame flange portion 12c side and the second reel frame flange portion 13
When combined from the side b, the flange diameter of the reel is D ₅ >
Since it is D ₆ , insertion work can be performed easily. Further, by using the meshing portion as the positioning portion 14, positioning can be performed more accurately than in the past. Next, when performing integral welding, the first reel frame flange portions 12b and 12c and the second reel frame flange portions 13b and 13c are engaged with each other by the meshing portions 12d and 13d.
With 12e and 13e, welding in a combined state is performed instead of welding in a simple butting state, so that welding distortion is reduced. Therefore, welding distortion does not reach the reel body portions 12a and 13a. Therefore, the coils 1a and 3a do not cause a positional deviation due to welding distortion, have a predetermined coil shape and arrangement, and can prevent generation of a non-uniform magnetic field component due to welding distortion. Also, the coils 1a and 3a
It is also possible to prevent the superconducting wire from being misaligned, and it becomes difficult for microslip to occur due to the electromagnetic force acting on the coil during excitation. Therefore, it is possible to obtain the superconducting magnet device in which the generated magnetic field uniformity in the target region is high and the quenching hardly occurs.

Embodiment 3. A third embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a cross-sectional view of essential parts showing a winding frame integrated structure of a superconducting magnet device according to a third embodiment of the present invention.
FIG. 4 is a side view showing the reel before assembly in FIG.
In the figure, those denoted by the same reference numerals as those in FIG. 1 are the same as those in the first embodiment, and the description thereof is omitted. 15 is a cylindrical body portion 15
The superconducting first coil group 1 is wound around a and the flange portions 1 are provided at both ends.
The first winding frame 5b, 15c is formed on the flange portion 15
On the inner side surfaces of b and 15c, there are support seats 15d and 15e projecting in a ring shape, respectively. Reference numeral 16 is a second winding frame in which the divided body portions 16a and 16b divided into a saddle shape (in this case, divided) are combined to have a cylindrical shape having a larger diameter than the body portion 15a and a superconducting second coil group is wound around the outer periphery. Then, the support seats 15d and 15e are provided between the flange portions 15b and 15c of the first winding frame.
It is inserted in the position.

Next, the operation will be described. Flange portion 15 of first winding frame 15 around which superconducting first coil group 1 is wound
Saddle-shaped split body portions 16a and 16b are attached to support seats 15d and 15e provided on b and 15c (a fixing method is not shown). Then, by winding the superconducting second coil group 3 around the divided body portions 16a and 16b, the superconducting first and second superconducting first and second superconducting first coil portions 16a and 16b having a predetermined coil shape and arrangement are formed.
A second coil group is obtained. Since there is no welding work when combining the superconducting first coil group and the second superconducting coil group, the reel body has no welding distortion. Therefore, the superconducting coils 1a, 3a
Does not cause coil displacement due to welding distortion, has a predetermined coil shape and arrangement, and can prevent generation of non-uniform magnetic field components. Further, it is possible to obtain a superconducting magnet device in which the generated magnetic field homogeneity in the target regions of the superconducting coils 1a and 3a is high and quenching hardly occurs.

Example 4. Although Examples 1 to 3 above show a superconducting coil group in which a plurality of superconducting coils are arranged, one superconducting coil is also applicable. Further, the invention can be applied to the case where the number of reels is two or more. Further, although the medical magnetic resonance diagnostic apparatus has been described, it can be applied to a magnet for high magnetic field analysis.

[0019]

As described above, according to claim 1 of the present invention, the first superconducting coil is formed of the cylindrical superconducting coil in which the flange portions are formed at both ends of the cylindrical first body portion. A first winding frame around which the group is wound, and a flange portion that is fitted to the flange portion of the first winding frame are formed at both ends of a cylindrical second body portion having a diameter larger than that of the first winding frame. A second winding frame formed by winding a superconducting second coil group composed of a cylindrical superconducting coil arranged concentrically with the first superconducting coil group, and inserting the first winding frame inside the second winding frame to combine In a superconducting magnet device in which the fitting parts are welded to form a part of the helium tank by integrating the two winding frames, the flange parts have different diameters of the fitting parts on both ends, and At least one of the flange parts of the frame has a reinforcement part on the corresponding body part and Because some parts are so as to form a positioning portion abutting the inner surface of the corresponding flange portion,
When integrally welding the bobbin, there is an effect that the welding distortion of the bobbin body can be prevented and the superconducting magnet device that has a high generated magnetic field homogeneity and hardly causes quenching can be obtained.

According to a second aspect of the present invention, flange portions are formed at both ends of the cylindrical first body portion, and the first superconducting first coil group composed of the cylindrical superconducting coils is wound around the first body portion. A superconducting first coil group is formed on the first reel and the second fuselage, which has a diameter larger than that of the first reel and is formed at both ends of a cylindrical second fuselage, and which is fitted to the flange of the first reel. A second winding frame formed by winding a superconducting second coil group composed of a cylindrical superconducting coil arranged concentrically with the first winding frame, and inserting the first winding frame inside the second winding frame to weld the combined fitting portion. In the superconducting magnet device in which both reels are integrated to form a part of the helium tank, the fitting parts of the flange part have different fitting diameters on both ends, and The convex side meshing part that protrudes like a ring from the inner surface and the convex side meshing part on the back side To form a positioning part which is composed of a concave side meshing part having a ring-shaped groove that fits with the mating part and protruding from the inner side surface, and a part of which is abutted in the axial direction by fitting of both meshing parts. Therefore, it is possible to obtain a superconducting magnet device in which the welding distortion of the reel body portion can be prevented when the reels are integrally welded, the generated magnetic field uniformity is high, and quenching hardly occurs.

According to the third aspect of the present invention, the first winding frame is formed by forming the flange portions on both ends of the cylindrical body portion and projecting the ring-shaped support seats on the inner surfaces of the flange portion facing each other. And a superconducting first coil group consisting of a cylindrical superconducting coil wound around the first winding frame body portion, and a body portion divided into at least two saddles along the support seat between the flange portions. A second winding frame that is inserted and formed into a cylindrical shape; and a second superconducting first coil group that includes a cylindrical superconducting coil that is wound around the second winding frame body portion concentrically with the first superconducting first coil group, Since both reels form part of the helium tank, the reels are integrated without welding, and there is an effect that a superconducting magnet device in which generated magnetic field uniformity is high and quench hardly occurs.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing the structure of a bobbin of a superconducting magnet device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of an essential part showing the structure of a bobbin of a superconducting magnet device according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of an essential part showing the structure of a bobbin of a superconducting magnet device according to a third embodiment of the present invention.

FIG. 4 is a side view showing the reel in FIG. 3 before assembly.

FIG. 5 is a cross-sectional view of an essential part showing the structure of a reel of a conventional superconducting magnet device.

FIG. 6 is a table showing a state of occurrence of thermal strain at the time of the conventional winding frame integrated joining welding.

FIG. 7 is an explanatory diagram showing a uniformity error due to a coil position shift.

[Explanation of symbols]

 1 Superconducting 1st coil group 1a-1c Superconducting coil 3 Superconducting 2nd coil group 3a, 3b Superconducting coil 7 1st winding frame 7a 1st body part 7b, 7c Flange part 8 2nd winding frame 8a 2nd body part 8b, 8c Flange portion 9,10 Reinforcing portion 9a Positioning portion 11a, 11b Welding portion 12 First reel 12a First body portion 12b, 12c Flange portion 13 Second reel 13a Second body portion 13b, 13c Flange portion 12d, 13e Convex side Engagement part 12e, 13d Recessed side engagement part 14 Positioning part 15 1st reel 15a Body part 15b, 15c Flange part 16 2nd reel 16a, 16b Split body part

[Procedure amendment]

[Submission date] June 17, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

[0012]

EXAMPLES Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is a sectional view of a main part showing a winding frame integrated structure of a superconducting magnet device according to a first embodiment of the present invention. In the figure, 1, 3, 6, X and Y are the same as the conventional ones, and the explanation thereof is omitted. Reference numeral 7 is a first winding frame in which the superconducting first coil group 1 is wound around a cylindrical first body portion 7a and flange portions 7b and 7c having different outer diameters are formed at both ends, and 7d is an axial direction of the superconducting first coil group. The support part of is shown. 8 is the first
The second superconducting second coil group 3 is wound around the second body portion 8a having a diameter larger than that of the body portion 7a, and the flange portions 8b and 8c are formed at both ends to fit the outer diameters of the flange portions 7b and 7c, respectively. Reference numeral 8d on the winding frame indicates a support portion in the axial direction of the superconducting second coil group 3. Reference numeral 9 is a reinforcement portion on one side provided on the second reel, and a plurality of the body portion 8a and the flange portion 7b are welded at an arbitrary pitch and the flange portion 7 of the first reel is provided.
It has a positioning portion 9a that abuts the inner surface of b. Reference numeral 10 is a reinforcing portion on the other side provided on the second winding frame, which is the second body portion 8
a and a plurality of flange portions 7c are welded at an arbitrary pitch, and at the time of combination, the first reel flange
It has a tapered positioning portion 10a in contact with the portion 7c.
11a is welded portions of the spool of the fitting diameters D _3, 11b is welded portions of both the bobbin of fitting diameter D _4.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Next, the operation will be described. When combining the first winding frame wound with the superconducting first coil group with the second winding frame wound with the superconducting second coil group, the first winding frame flange portion 7c side and the second winding frame flange portion 8b side Doing combination from the flange diameter of the winding frame is D _3> D _4, Volume 2
In the tapered positioning portion 10a of the reinforcing portion 10 on the frame 8c side
Therefore, the radial position of the first winding frame flange portion 7c is determined by itself.
The insertion work can be done easily. In addition, when the coil is positioned, a part of the reinforcing portion 9 on the second winding frame 8b side is used as the positioning portion 9a, so that the combination can be performed more accurately than in the past. Next, when performing integrated welding, the reinforcing portion 9,
With 10, the mechanical strength of the flange portions 7b, 7c, 8b, 8c and the second body portion 8a is increased, and welding distortion is reduced. Therefore, welding distortion does not reach the reel body portions 7a and 8a. Therefore, the coils 1a and 3a do not cause a positional deviation due to welding distortion, have a predetermined coil shape and arrangement, and can prevent generation of a non-uniform magnetic field component due to welding distortion. Further, it is possible to prevent the superconducting wire rods of the coils 1a and 3a from being misaligned, and it becomes difficult for microslip to occur due to the electromagnetic force acting on the coils during excitation. Therefore, it is possible to obtain the superconducting magnet device in which the generated magnetic field uniformity in the target region is high and the quenching hardly occurs. In this embodiment, the flange portion of the second reel is reinforced, but the first body portion of the first reel has a mounting space for reinforcement to reinforce the flange portion of the first reel. You may do it.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of Codes] 1 superconducting first coil group, 1a to 1c superconducting coils,
3 superconducting second coil group, 3a, 3b superconducting coil,
7 1st reel, 7a 1st body part, 7b, 7c Flange part, 8 2nd reel, 8a 2nd body part, 8b, 8c
Flange portion, 9, 10 Reinforcing portion, 9a, 10a Positioning portion, 11a, 11b Welding portion, 12 First reel frame, 12
a 1st body part, 12b, 12c flange part, 13
2nd reel, 13a 2nd body part, 13b, 13c Flange part, 12d, 13e Convex side meshing part, 12e,
13d concave side engaging portion, 14 positioning portion, 15
1st reel, 15a body part, 15b, 15c Flange part, 16 2nd reel, 16a, 16b Split body part.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (3)

[Claims] 1. A first winding frame, wherein flange portions are formed at both ends of a cylindrical first body portion, and a superconducting first coil group composed of a cylindrical superconducting coil is wound around the first body portion, and the first winding frame. Flange portions that fit into the flange portions of the first winding frame are formed at both ends of a cylindrical second body portion having a diameter larger than that of the winding frame, and the second body portion is concentrically arranged with the superconducting first coil group. A second winding frame formed by winding a superconducting second coil group composed of a cylindrical superconducting coil, wherein the first winding frame is inserted inside the second winding frame, the combination is welded, and the fitting portion is welded. In a superconducting magnet device in which both reels are integrated to form a part of a helium tank, the flange portion has different diameters of the fitting portion on both end sides thereof, and at least the reel portions are at least One of the above-mentioned flange parts has a corresponding body part and a reinforcing part and A superconducting magnet device, characterized in that a positioning portion is formed so that a part of the reinforcing portion abuts an inner surface of a corresponding flange portion. 2. A first winding frame, wherein flange portions are formed at both ends of a cylindrical first body portion, and a superconducting first coil group including a cylindrical superconducting coil is wound around the first body portion, and the first winding frame. Flange portions that fit into the flange portions of the first winding frame are formed at both ends of a cylindrical second body portion having a diameter larger than that of the winding frame, and the second body portion is concentrically arranged with the superconducting first coil group. A second winding frame formed by winding a superconducting second coil group composed of a cylindrical superconducting coil, wherein the first winding frame is inserted inside the second winding frame, the combination is welded, and the fitting portion is welded. In a superconducting magnet device in which both reels are integrated to form a part of a helium tank, the fitting portion of the flange portion has different fitting diameters on both end sides, and The convex side is a ring-shaped protruding part from the inner surface and the convex side is on the back side. The engaging portion is formed of a concave engaging portion that has a ring-shaped groove that fits and that protrudes from the inner side surface, and when the engaging portions are engaged, a positioning portion that partially abuts in the axial direction is formed. A superconducting magnet device. 3. A first winding frame having flange portions formed at both ends of a cylindrical body portion, and projecting ring-shaped support seats on opposing inner side surfaces of the flange portion, and the first winding frame body portion. Superconducting coil consisting of a cylindrical superconducting coil
A second winding frame having a coil group, a body portion divided into at least two saddle-like shapes and inserted between the flange portions along the support seat to form a cylindrical shape, and the second winding frame body portion. And a superconducting first coil group composed of a cylindrical superconducting coil wound concentrically with the superconducting first coil group, wherein both winding frames form part of a helium tank. Superconducting magnet device.