KR102027784B1 - method for shimming superconductor magnet apparatus and structure of the same - Google Patents

Abstract

The present invention discloses a seaming method of a superconducting magnet device and its structure. The seaming method includes inducing a magnetic field in a bobbin extending in a first direction, measuring the magnetic field in the bobbin, mapping the intensity of the magnetic field, and correcting the magnetic field according to the mapped position. Include. The correcting of the magnetic field may include calculating a thickness of the iron pieces compensating for the strength of the magnetic field at the mapped position, integerizing the calculated thicknesses of the iron pieces, and And rearranging the thickness to reduce the thickness difference of the iron pieces in the second direction crossing the first direction.

Description

Method for shimming superconductor magnet apparatus and structure of the same

The present invention relates to a seaming method for a superconducting magnet device, and more particularly, to a seaming method for a superconducting magnet device including iron pieces having an integer thickness and a structure thereof.

Superconductors can carry current without loss of power. For example, a high temperature superconductor (HTS) has a property of zero resistance at or below a critical temperature above the vaporization temperature of liquid nitrogen. High-temperature superconductors are actively researched and developed to be commercialized as power devices such as cables, transformers, generators, current limiters, and motors, and medical / bio applications such as magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR). It is done.

The problem to be solved by the present invention is to provide a seaming method of a superconducting magnet device that can reduce the difficulty of manufacturing.

In addition, another object of the present invention is to provide a seaming method of a superconducting magnet device that can improve the spatial uniformity of the magnetic field.

The present invention discloses a seaming method for a superconducting magnet device. Its seaming method comprises the steps of inducing a magnetic field in a bobbin extending in a first direction; Measuring the magnetic field in the bobbin and mapping the strength of the magnetic field; And correcting the magnetic field according to the mapped position. The correcting of the magnetic field may include: calculating thicknesses of iron pieces for compensating the strength of the magnetic field at the mapped position; Purifying the thickness of the calculated iron pieces; And rearranging the thicknesses of the purified iron pieces to reduce the thickness difference between the iron pieces in a second direction crossing the first direction.

According to one example, the step of integerizing the thickness of the iron pieces comprises: compensating the thickness of the iron pieces in the first direction; Compensating the thickness of the iron pieces in the second direction; And compensating the thickness of the iron pieces in a third direction crossing the first and second directions.

According to an example, the step of integerizing the thickness of the iron pieces may include adding or subtracting decimals below the decimal point of the thickness of the iron pieces in the first to third directions according to the mapped position.

According to an example, when the first and second directions are horizontal and vertical directions, the third direction may be a diagonal direction.

According to an example, correcting the magnetic field may include: manufacturing a seaming module by fixing the iron pieces to a cylinder; And providing the seaming module in the bobbin.

According to one example, fixing the iron pieces may include winding an insulating tape on the iron pieces on the cylinder.

According to one example, the step of correcting the magnetic field may further comprise determining the difficulty of placement of the iron pieces according to the thickness of the rearranged iron pieces.

According to an example, the placement difficulty may be calculated by dividing the sum of the number of occurrences of the thickness difference between the iron pieces in the second direction by the number of the mapped positions.

According to an example, the thickness of the iron pieces may be proportional to the strength of the magnetic field.

According to an example, each of the iron pieces may have a rectangular shape having a length greater in the second direction than the length in the first direction.

A superconducting magnet device according to an embodiment of the present invention, a superconducting coil module including a bobbin extending in a first direction and a superconducting coil wound along the bobbin in a second direction crossing the first direction; And a magnetic shimming module disposed in the superconducting coil module to correct the intensity of the magnetic field in the superconducting coil module and including iron pieces having similar thicknesses that are integerized in a second direction crossing the first direction.

According to one example, the superconducting coil module comprises: a bobbin; And a superconducting wire wound along the outer circumferential surface of the bobbin. The superconducting wire may include a high temperature superconductor.

According to one example, the magnetic seaming module comprises: a first seaming module in the bobbin; A second seaming module in the first seaming module; And a third seaming module disposed in the second seaming module to improve spatial uniformity in the second seaming module.

According to one example, the first seaming module comprises: a first cylinder disposed in the bobbin and extending along the bobbin; And first iron pieces disposed on an outer circumferential surface of the first cylinder.

According to an example, the first seaming module may further include a first adhesive tape disposed on the first iron pieces and compressing the first iron pieces to the first cylinder.

According to one example, the distance between the bobbin and the first cylinder may be greater than the thickness of the iron pieces and the first adhesive tape.

According to one example, the first cylinder may include an aluminum pipe or a suspipe.

As described above, the seaming method of the superconducting magnet device according to the embodiment of the present invention may include the step of integerizing the thickness of the iron pieces to compensate the strength of the magnetic field and rearranging the calculated thickness of the iron pieces. Purifying the thickness of the iron pieces can reduce the difficulty of manufacturing the iron pieces. In addition, rearranging the thicknesses of the iron pieces may reduce the difficulty in manufacturing the iron pieces by reducing the thickness difference of the iron pieces in the azimuth direction perpendicular to the longitudinal direction of the cylinder.

1 is a cross-sectional view showing a superconducting magnet device according to an embodiment of the present invention.
2 is a perspective view illustrating an example of the magnetic seaming module of FIG. 1.
3 are graphs showing first to fourth magnetic field change rates in the bobbin of FIG. 1.
4 is a flowchart illustrating a seaming method of the superconducting magnet device of FIG. 1.
FIG. 5 is a flowchart illustrating an example of correcting the intensity of the magnetic field of FIG. 4.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods of achieving the same will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in different forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the invention to those skilled in the art, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words "comprises" and / or "comprising" refer to the presence of one or more other components, steps, operations and / or elements. Or does not exclude additions. In addition, since it is in accordance with the preferred embodiment, reference numerals presented in the order of description are not necessarily limited to the order. In addition, in the present specification, when it is mentioned that a film is on another film or substrate, it means that it may be formed directly on the other film or substrate or a third film may be interposed therebetween.

In addition, the embodiments described herein will be described with reference to cross-sectional and / or plan views, which are ideal exemplary views of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Accordingly, shapes of the exemplary views may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include variations in forms generated by the manufacturing process. For example, the etched regions shown at right angles may be rounded or have a predetermined curvature. Accordingly, the regions illustrated in the figures have schematic attributes, and the shape of the regions illustrated in the figures is intended to illustrate a particular form of region of the device and not to limit the scope of the invention.

1 shows a superconducting magnet device 100 according to an embodiment of the present invention.

Referring to FIG. 1, the superconducting magnet device 100 of the present invention may include a nuclear magnetic resonance (NMR) device. In contrast, the superconducting magnet device 100 may include a magnetic resonance imaging (MRI) device. According to an example, the superconducting magnet device 100 may include a refrigerant chamber 110, a superconducting coil module 120, and magnetic seaming modules 130.

The coolant chamber 110 may store the coolant 112. For example, the refrigerant 112 can include liquid nitrogen and / or liquid helium. Superconducting coil modules 120 may be disposed in the refrigerant chamber 110. Superconducting coil modules 120 may be immersed in the refrigerant (112). The coolant 112 may be circulated to a chiller (not shown) outside the coolant chamber 110. The coolant 112 may have a temperature of about 77K or less. The superconducting coil modules 120 may be cooled by the refrigerant.

The superconducting coil module 120 may include a bobbin 122 and a superconducting coil 124. The bobbin 122 may be disposed in the superconducting coil 124. For example, the bobbin 122 may comprise a dielectric pipe of plastic or polymer. The superconducting coil 124 may be wound along the outer circumferential surface of the bobbin 122. Superconducting coil 124 may comprise high temperature superconducting wires. The superconducting coil 124 may induce a magnetic field 150 in the bobbin 122. The bobbin 122 may extend in the same direction as the direction of the magnetic field 150.

The magnetic seaming module 130 may be disposed in the refrigerant chamber 110 and the superconducting coil module 120. The magnetic seaming module 130 may be spaced apart from the refrigerant 112. The magnetic field 150 of the superconducting coil modules 120 may pass through the magnetic seaming module 130. The magnetic seaming module 130 may uniformly control the magnetic field 150.

2 illustrates an example of the magnetic seaming module 130 of FIG. 1.

1 and 2, the magnetic seaming module 130 may include first to third seaming modules 133, 137, and 140.

The first seaming module 133 may be disposed in the bobbin 122. The first seaming module 133 may improve spatial uniformity of the strength of the magnetic field 150 in the bobbin 122. According to an example, the first seaming module 133 may include a first cylinder 132, first iron pieces 134, and a first adhesive tape 135.

The first cylinder 132 may be disposed in the bobbin 122. The first cylinder 132 may extend along the bobbin 122. The first cylinder 132 may include a nonmagnetic material. For example, the first cylinder 132 may include an aluminum pipe or a SUS pipe.

The first iron pieces 134 may be disposed on an outer circumferential surface of the first cylinder 132. The first iron pieces 134 may be ferromagnetic. The first iron pieces 134 may control the magnetic field 150 in the first cylinder 132. For example, the first iron pieces 134 may improve the spatial uniformity of the magnetic field 150 in the first cylinder 132. The first iron pieces 134 may have a thickness proportional to the strength of the magnetic field 150. The first iron pieces 134 may have a thickness in mil units. The position and shape of the first iron pieces 134 may be determined according to the distribution of the magnetic field 150 in the bobbin 122. The first iron pieces 134 may have a rectangular shape. The magnetic field 150 may be unevenly measured in the bobbin 122 due to design and manufacturing errors. The first iron pieces 134 may be designed to make the magnetic field 150 uniform.

The first adhesive tape 135 may compress and / or fix the first iron pieces 134 on the outer circumferential surface of the first cylinder 132. The distance between the bobbin 122 and the first cylinder 132 may be greater than the thicknesses of the first iron pieces 134 and the first adhesive tape 135.

The second seaming module 137 may be disposed in the first seaming module 133. The second seaming module 137 may improve the spatial uniformity of the strength of the magnetic field 150 in the first seaming module 133. According to an example, the second seaming module 137 may include a second cylinder 136, second iron pieces 138, and a second adhesive tape 139.

The second cylinder 136 may be disposed in the first cylinder 132. The second cylinder 136 may be parallel to the first cylinder 132. The second cylinder 136 may include a nonmagnetic material. For example, the second cylinder 136 may include an aluminum pipe or a SUS pipe.

The second iron pieces 138 may be disposed on an outer circumferential surface of the second cylinder 136. The second iron pieces 138 may be ferromagnetic. The second iron pieces 138 may control the magnetic field 150 in the second cylinder 136. The second iron pieces 138 may improve the spatial uniformity of the magnetic field 150 in the second cylinder 136. The second iron pieces 138 may have a thickness proportional to the strength of the magnetic field 150. The second iron pieces 138 may have a thickness of an integer number of mils. The position and shape of the second iron pieces 138 may be adjusted according to the distribution of the magnetic field 150 in the bobbin 122. The second iron pieces 138 may have a rectangular shape.

The second adhesive tape 139 may compress and / or fix the second iron pieces 138 on the outer circumferential surface of the second cylinder 136. The distance between the second cylinder 136 and the first cylinder 132 may be greater than the thickness of the second iron pieces 138 and the second adhesive tape 139.

The third seaming module 140 may be disposed outside the second cylinder 136. The third seaming module 140 may improve spatial uniformity of the strength of the magnetic field 150. According to an example, the third seaming module 140 may include a third cylinder 142, third iron pieces 144, and a third adhesive tape 146.

The third cylinder 142 may be disposed outside the second cylinder 136. The third cylinder 142 may extend along the second cylinder 136. The third cylinder 142 may include a nonmagnetic material. For example, the third cylinder 142 may include an aluminum pipe or a suspipe.

The third iron pieces 144 may be disposed on an outer circumferential surface of the third cylinder 142. The third iron pieces 144 may be ferromagnetic materials. The third iron pieces 144 may control the magnetic field 150 in the third cylinder 142. The third iron pieces 144 may improve the spatial uniformity of the magnetic field 150 in the third cylinder 142. The third iron pieces 144 may have a thickness proportional to the strength of the magnetic field 150. The third iron pieces 144 may have a thickness of an integer number of mils. The position and shape of the third iron pieces 144 may be adjusted according to the distribution of the magnetic field 150 in the bobbin 122. The third iron pieces 144 may have a rectangular shape.

The third adhesive tape 146 may compress or fix the third iron pieces 144 on the outer wall and / or the outer circumferential surface of the third cylinder 142. The distance between the third cylinder 142 and the second cylinder 136 may be greater than the thickness of the third iron pieces 144.

 Although not shown, fourth to nth cylinders may be disposed in the third cylinder 142. In addition, fourth to nth iron pieces and third to nth adhesive tapes may be disposed on the outer circumferential surfaces of the fourth to nth cylinders. The fourth to nth iron pieces may improve the spatial uniformity by deflecting the magnetic field 150 in the fourth to nth cylinders.

The field mapper 200 may measure the strength of the magnetic field 150 in the third seaming module 140. In addition, the field mapper 200 may map the thicknesses of the first to third iron pieces 134, 138, and 144 according to the positions of the outer circumferential surfaces of the first to third cylinders 132, 136, and 142. have. According to an example, the field mapper 200 may include a controller 210, a magnetic field sensor 220, and a jig 230. The jig 230 may use the magnetic field sensor 220 as the bobbin 122. And the first to third cylinders 132, 136, and 142. The magnetic field sensor 220 may detect the magnetic field 150. The controller 210 may include the magnetic field sensor 220. Intensity of the magnetic field 150 may be detected and / or calculated by using a detection signal of).

FIG. 3 shows a comparison of the first to fourth magnetic field change rates 162, 164, 166, and 168 in the bobbin 122 of FIG. 1.

Referring to FIG. 3, the second to fourth magnetic field change rates 164, 166, and 168 of the first to third seaming modules 133, 137, and 140 may include the first magnetic field change rate 162 of the superconducting coil 124. May be less than). The first magnetic field change rate 162 may be a change rate of the magnetic field 150 in the longitudinal direction from the center of the bobbin 122. The first to third seaming modules 133, 137, and 140 may not be provided in the bobbin 122.

The second magnetic field change rate 164 may be a change rate of the magnetic field 150 in the longitudinal direction from the center of the first cylinder 132. The second and third cylinders 136 and 142 may not be provided in the first cylinder 132.

The third magnetic field change rate 166 may be smaller than the second magnetic field change rate 164. The third magnetic field change rate 166 may be a change rate of the magnetic field 150 in the longitudinal direction of the center of the second cylinder 136. The third cylinder 142 may not be provided in the second cylinder 136.

The fourth magnetic field change rate 168 may be smaller than the third magnetic field change rate 166. The fourth magnetic field change rate 168 may be a rate of change of the magnetic field 150 in the longitudinal direction of the third cylinder 142.

Hereinafter, the seaming method of the superconducting magnet device 100 of the present invention will be described.

4 is a flowchart illustrating a seaming method of the superconducting magnet device 100 of FIG. 1.

Referring to FIG. 4, in the seaming method of the present invention, inducing a magnetic field 150 in the bobbin 122 (S10), measuring the magnetic field 150 in the bobbin 122 (S20), and the magnetic field Compensating the intensity of 150 (S30) and determining whether to complete the intensity correction of the magnetic field (150) (S40).

First, the superconducting coil module 120 induces the magnetic field 150 in the bobbin 122 without the magnetic seaming module 130 (S10). The strength of the magnetic field 150 may be proportional to the current applied to the superconducting coil 124. For example, the superconducting coil module 120 may induce the magnetic field 150 of about 3T.

Next, the field mapper 200 measures the magnetic field 150 in the bobbin 122 and maps the intensity of the magnetic field 150 according to the position in the bobbin 122 (S20). The field mapper 200 may move in the direction of the magnetic field 150 at the center of the bobbin 122. The strength of the magnetic field 150 may be quantitatively measured and / or mapped along the axial direction of the bobbin 122.

Thereafter, the control unit 210 corrects the strength of the magnetic field 150 by using the first to third seaming modules 133, 137, and 140 (S30).

FIG. 5 shows an example of correcting the intensity of the magnetic field 150 of FIG. 4 (S30).

Referring to FIG. 5, the step S30 of correcting the intensity of the magnetic field 150 may include calculating the thicknesses of the first to third iron pieces 134, 138, and 144 for each mapped position (S31). The step (S32) of integerizing the thickness of the first to third iron pieces (134, 138, 144), the step of rearranging the thickness of the first to third iron pieces (134, 138, 144) (S36), Determining an arrangement difficulty of the first to third iron pieces (134, 138, 144) (S37), the first to third iron pieces (134, 138, 144) to the first to third cylinders ( The step S38 may be fixed to 132, 136, and 142, and the first to third seaming modules 133, 137, and 140 may be provided in the bobbin 122 (S39).

The controller 210 calculates thicknesses of the first to third iron pieces 134, 138, and 144 for each mapped position (S31). The thicknesses of the first to third iron pieces 134, 138, and 144 may be calculated by rational numbers (ex, 0 to about 5 mils) or real numbers.

Next, the controller 210 integerizes the thicknesses of the first to third iron pieces 134, 138, and 144 of the rational number or real number (S32). When the first to third iron pieces 134, 138, and 144 have a rectangular shape having a longer length than a vertical length, a step of purifying the thicknesses of the first to third iron pieces 134, 138, and 144 ( S32) may include adding or subtracting decimals below the decimal point of the thickness of the first to third iron pieces 134, 138, and 144 in the vertical, horizontal, and diagonal directions according to the mapped position. According to an example, the step S32 of integerizing the thicknesses of the first to third iron pieces 134, 138, and 144 may be based on the thickness of the first to third iron pieces 134, 138, and 144 in a vertical direction. Compensating step S33, compensating the thicknesses of the first to third iron pieces 134, 138, and 144 in the horizontal direction (S34) and the first to third iron pieces 134, 138, and 144. Compensating the thickness of the cross-section in a diagonal direction (S35).

Table 1 shows an example of the step (S32) of integerizing the thickness of the first to third iron pieces (134, 138, 144). The plurality of cells in Table 1 may correspond to four or fourth order design results.

Referring to Table 1, each of the first and second mapped positions of the first row of the first cell may be calculated from 0.1 to 0. 0.2 of the second mapped position of the second row of the first cell and 0.1 and 0.1 of the first and second mapped positions of the first row add up to 0.4 at the second mapped position of the second row of the second cell. The second mapped position of the second row of the third cell may be calculated as 0. Each of the mapped positions of the fourth cells may all have an integer number. The unit of the integer number may be mil. When the thicknesses of the first to third iron pieces 134, 138, and 144 are set to decimals below the decimal point, the first to third iron pieces 134, 138, and 144 are generally difficult to manufacture. . Therefore, the controller 210 may reduce the difficulty in manufacturing by integerizing the thicknesses of the first to third iron pieces 134, 138, and 144.

Next, the controller 210 rearranges the thicknesses of the first to third iron pieces 134, 138, and 144 to similar values in the horizontal direction (S36).

 Table 2 shows an example of rearranging the thicknesses of the first to third iron pieces 134, 138, and 144 (S36).

Referring to Table 2, the controller 210 rearranges the thicknesses of the first to third iron pieces 134, 138, and 144 of the first and third rows to 0 and 1, and the second and fifth. Rearrange the thickness of the first to third iron pieces 134, 138, 144 of the string to 0 and 2, and the thickness of the first to third iron pieces 134, 138, 144 of the fourth row Can be rearranged to 0, 1, and 2. 2 in the first and third lines can be separated into 1 and 1 per mapped position in the transverse direction. That is, the mapped position with 1 may increase. The mapped position of 1 in the second and fifth lines may disappear, and the mapped position of 2 may increase. The mapped position of the fourth line 2 may be generated according to the decrease of the mapped position of 1 of the third and fifth lines.

Next, the controller 210 determines the difficulty of arranging the first to third iron pieces 133, 137, and 140 (S37). The placement difficulty may be calculated by dividing the sum of the number of occurrences of the thickness difference in the horizontal direction of the mapped locations by the total number of the mapped locations. The difficulty before rearrangement of Table 2 can be calculated as about 0.283 (17/60), and the difficulty after rearrangement can be calculated as about 0.167 (10/60). The difficulty may decrease after rearrangement of the thicknesses of the first to third iron pieces 134, 138, and 144. That is, in the step S36 of rearranging the thicknesses of the first to third iron pieces 134, 138, and 144, the difference between the thicknesses of the first to third iron pieces 134, 138, and 144 in the horizontal direction is different. It can be determined to minimize the.

Next, an operator or engineer fixes the first to third iron pieces 134, 138, and 144 to the first to third cylinders 132, 136, and 142, respectively (S38).

In addition, an operator or an engineer sequentially provides the first to third cylinders 132, 136, and 142 into the bobbin 122 (S39).

Referring back to FIG. 4, the controller 210 determines whether to complete the intensity correction of the magnetic field 150 (S40). Steps S10 to S40 may be repeatedly performed until the first to third cylinders 132, 136, and 140 are all provided in the bobbin 122. When the first to third cylinders 132, 136, and 140 are all provided in the bobbin 122, the intensity correction of the magnetic field 150 may be completed.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

Claims (17)

Inducing a magnetic field in the bobbin extending in a first direction;
Measuring the magnetic field in the bobbin and mapping the strength of the magnetic field; And
Correcting the magnetic field according to the mapped position;
Compensating the magnetic field is:
Calculating thicknesses of the iron pieces compensating for the strength of the magnetic field at the mapped position;
Purifying the thickness of the calculated iron pieces; And
Rearranging the thicknesses of the purified iron pieces to reduce the thickness difference of the iron pieces in a second direction crossing the first direction,
The step of integerizing the thickness of the iron pieces is:
Compensating for the thickness of the iron pieces in the first direction;
Compensating the thickness of the iron pieces in the second direction; And
Compensating for the thickness of the iron pieces in a third direction crossing the first and second directions.
delete The method of claim 1,
And integerizing the thickness of the iron pieces include adding or subtracting decimals below the decimal point of the thickness of the iron pieces in the first to third directions according to the mapped position.
The method of claim 1,
And the third direction is a diagonal direction when the first and second directions are horizontal and vertical directions.
The method of claim 1,
Compensating the magnetic field is:
Manufacturing the seaming module by fixing the iron pieces to a cylinder; And
And providing the seaming module in the bobbin.
The method of claim 5,
The fixing of the iron pieces includes the step of winding an insulating tape on the iron piece on the cylinder seaming method of the superconducting magnet device.
The method of claim 1,
Compensating the magnetic field further comprises the step of determining the difficulty of placement of the iron pieces according to the thickness of the rearranged iron pieces.
The method of claim 7, wherein
And the placement difficulty is calculated by dividing the sum of the number of thickness difference occurrences of the iron pieces in the second direction by the number of the mapped positions.
The method of claim 1,
Simulating the thickness of the iron pieces is proportional to the strength of the magnetic field.
The method of claim 1,
And each of the iron pieces has a rectangular shape having a larger width in the second direction than a length in the first direction.
A superconducting coil module comprising a bobbin extending in a first direction and a superconducting coil wound along the bobbin in a second direction crossing the first direction; And
A magnetic shimming module disposed in the superconducting coil module to correct the strength of the magnetic field in the superconducting coil module, the magnetic shimming module including iron pieces having similar thicknesses integerized in a second direction crossing the first direction,
The superconducting coil module is:
Bobbin; And
Including a superconducting wire wound along the outer circumferential surface of the bobbin,
The superconducting wire includes a high temperature superconductor,
The magnetic seaming module is:
A first seaming module in the bobbin;
A second seaming module in the first seaming module; And
And a third seaming module disposed in the second seaming module to improve spatial uniformity of the magnetic field in the second seaming module.
delete delete The method of claim 11,
The first seaming module is:
A first cylinder disposed in the bobbin and extending along the bobbin; And
A superconducting magnet device comprising first iron pieces disposed on an outer circumferential surface of the first cylinder.
The method of claim 14,
The first seaming module further includes a first adhesive tape disposed on the first iron pieces to press the first iron pieces to the first cylinder.
The method of claim 15,
A superconducting magnet device, wherein the distance between the bobbin and the first cylinder is greater than the thickness of the iron pieces and the first adhesive tape.
The method of claim 14,
And the first cylinder comprises an aluminum pipe or a suspend pipe.

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