Integrated multi-dimensional magnetic field compensation device and magnetic confinement fusion device

Abstract

The application provides an integrated multi-dimensional magnetic field compensation device, and relates to the technical field of controlled nuclear fusion devices. In the device, planar coils are laid in the circumferential grooves of a sealing flange to generate a parallel magnetic field parallel to the axial direction of an extension structure. The parallel magnetic field is subjected to magnetic field correction and compensation in the z direction. A sleeve structure and a positioning structure are both sleeved in the annular space outside the extension structure and tightly combined with the outer surface of the extension structure and the inner surface of the shell. The outer surface of the sleeve structure comprises a plurality of symmetrically arranged concave spaces, each of which is used for placing a group of coils. The oppositely arranged coil groups generate a same-direction magnetic field. The mutually vertically arranged coil groups generate a vertical magnetic field, which is subjected to magnetic field correction and compensation in the x and y directions. The device is installed outside the vacuum chamber port of a magnetic confinement fusion device, a plurality of magnetic field compensation coils are integrated on the outer surface of the port, and independent regulation and fine compensation of the local three-dimensional magnetic field components of the port region can be realized.

Description

Technical Field

[0001] This invention relates to the field of controlled nuclear fusion device technology, and in particular to an integrated multidimensional magnetic field compensation device. Background Technology

[0002] Magnetic confinement fusion devices rely on strong magnetic fields generated by external coils to confine high-temperature plasma. Whether it's a tokamak or a stellarator, its vacuum chamber shell must have numerous ports for installing subsystems such as plasma diagnostics, neutral beam injection, radio frequency heating, and gas extraction / removal. The presence of these ports inevitably disrupts the geometric symmetry and continuity of the conductive walls of the magnetic confinement fusion device, thus introducing localized error magnetic fields. Setting ports on the vacuum chamber shell introduces geometric and manufacturing errors; welding deformation and positional deviations of the port flanges, as well as magnetic flux leakage caused by openings, can locally introduce higher-order harmonic components.

[0003] Localized error magnetic fields introduce physical limitations: large master magnets are typically not feasible in port regions, making these areas blind spots for magnetic field optimization. In stellarators, these localized error magnetic fields can lead to magnetic island expansion and magnetic surface fracturing; in tokamaks, port error magnetic fields may induce mode-locking or affect plasma edge stability.

[0004] Existing error magnetic field correction schemes mainly fall into two categories: The first relies on large correction coils placed on the outer perimeter of the vacuum chamber. However, these coils are typically tens of centimeters to several meters away from the port error source, resulting in low coupling efficiency. Furthermore, they are primarily used to compensate for global low-order error modes, making it difficult to precisely correct localized, high-gradient three-dimensional errors at the port. The second scheme involves wiring the correction magnetic field within the port's inner wall. While this method offers the highest correction efficiency, it presents significant engineering risks due to the challenges of ultra-high vacuum cleanliness, radiation damage, and high-voltage insulation. Therefore, those skilled in the art urgently need a localized magnetic field compensation scheme that can be closely attached to the port's outer surface, does not occupy internal space, and possesses modular engineering characteristics. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated multidimensional magnetic field compensation device that can solve at least one of the above-mentioned problems in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention provides an integrated multidimensional magnetic field compensation device, which includes: a sealing flange 1, a housing 2, a positioning structure 3, a coil group 4, an extension structure 5, a sleeve structure 6, and a planar coil 7. The planar coil 7 is laid in the groove around the sealing flange 1; the sealing flange 1 is aligned and fastened to the outer shell 2; The extension structure 5 is a hollow, closed-bottom cylindrical shape. The end of the sealing flange 1 near the outer shell 2 is connected to the top of the extension structure 5, and the end of the extension structure 5 is tightly fitted to the outer shell 2. The diameter of the middle and top of the extension structure 5 is smaller than the inner diameter of the outer shell 2. The extension structure 5 and the outer shell 2 are fitted together to form an annular space. The fixed planar coil 7 generates a parallel magnetic field parallel to the axial direction of the extension structure 5. The parallel magnetic field performs magnetic field correction and compensation in the z-direction. The sleeve structure 6 is sleeved in the annular space outside the extension structure 5 and is tightly fitted with the outer surface of the extension structure 5 and the inner surface of the outer shell 2, so that the radial position of the sleeve structure 6 is fixed. The positioning structure 3 is sleeved on the outside of the extension structure 5. The inner diameter of the positioning structure 3 is equal to the outer diameter of the extension structure 5. The top and bottom ends of the positioning structure 3 are tightly fitted to the sealing flange 1 and the sleeve structure 6 on the side close to the sealing flange 1, respectively. The positioning structure 3 is used to limit the axial position of the sleeve structure 6 in the annular space. The outer surface of the sleeve structure 6 includes a plurality of symmetrically arranged concave spaces, each of which is used to place a coil group 4; the coil groups arranged opposite each other generate a magnetic field in the same direction; the coil groups arranged perpendicularly to each other generate a vertical magnetic field, and the vertical magnetic field is corrected and compensated in the x and y directions.

[0007] Optionally, the device further includes a flange cover plate 8; the flange cover plate 8 includes cylindrical screw countersunk holes aligned with threaded holes on the sealing flange 1, and the flange cover plate 8 is fastened to the sealing flange 1 by bolts.

[0008] Optionally, the inner surface of the sealing flange 1 includes a raised structure; the raised structure restricts the position of the sealing flange 1 relative to the housing 2, and restricts the position of the extension structure 5 relative to the sealing flange 1.

[0009] Optionally, the positioning structure 3 is a positioning cylinder; the extension structure 5 is an extension cylinder; and the sleeve structure 6 is a sleeve.

[0010] Optionally, the planar coil 7 is made of multiple strands of wire wound together.

[0011] Optionally, the outer surface of the sleeve structure 6 includes four symmetrically arranged concave spaces; each of the four concave spaces holds one of the coil groups 4; the positions of each coil group are 90 degrees apart.

[0012] Optionally, the coils in the coil group 4 are saddle-shaped coils.

[0013] Optionally, the outer surface of the sleeve structure 6 includes eight symmetrically arranged concave spaces; each of the eight concave spaces holds one of the coil groups 4; the positions of each coil group differ by 45 degrees.

[0014] Optionally, the planar coil 7 and each coil group 4 are driven by an independent power supply to form a controllable local magnetic field component.

[0015] This invention also provides a magnetic confinement fusion device, which includes multiple vacuum chamber ports. The magnetic confinement fusion device includes any of the above-mentioned integrated multidimensional magnetic field compensation devices. The integrated multidimensional magnetic field compensation device is installed outside the vacuum chamber ports and is coaxially arranged with the vacuum chamber ports along the axial direction of the vacuum chamber ports.

[0016] The integrated multidimensional magnetic field compensation device disclosed in this invention comprises a fixed planar coil laid in a groove around the sealing flange to generate a parallel magnetic field parallel to the axial direction of the extension structure. This parallel magnetic field corrects and compensates for magnetic field defects in the z-direction. A sleeve structure is fitted into an annular space outside the extension structure and is tightly fitted to the outer surface of the extension structure and the inner surface of the outer shell, thus fixing the radial position of the sleeve structure. A positioning structure is fitted into the outer side of the extension structure, with its top and bottom ends tightly fitted to the sealing flange to limit the axial position of the sleeve structure in the annular space. The outer surface of the sleeve structure includes multiple symmetrically arranged concave spaces, each used to hold a set of coils. Oppositely arranged coil combinations generate a magnetic field in the same direction. Perpendicularly arranged coil combinations generate a vertical magnetic field, which corrects and compensates for magnetic field defects in the x and y directions. The device is installed on the outside of the vacuum chamber port of the magnetic confinement fusion device and arranged coaxially along the port axis. Without damaging the inside of the vacuum chamber of the magnetic confinement fusion device, the device forms an integrated load-bearing and installation structure around the vacuum chamber port. By integrating multiple sets of magnetic field compensation coils on the outer surface of the port, it can achieve independent control and fine compensation of the local three-dimensional magnetic field components in the port area, thereby further improving the space utilization of the magnetic confinement fusion device. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a stellarator fusion device in the prior art. Figure 2 This is a schematic cross-sectional view of the integrated multidimensional magnetic field compensation device according to an embodiment of the present invention; Figure 3 This is an exploded view of the sealing area of ​​the integrated multidimensional magnetic field compensation device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the integrated multidimensional magnetic field compensation device after removing the outer shell according to an embodiment of the present invention; Figure 5 This is a detailed schematic diagram of the sleeve area according to an embodiment of the present invention; Figure 6 This is an isometric view of the integrated multidimensional magnetic field compensation device according to an embodiment of the present invention; Icons: 1-Sealing flange, 2-Shell, 3-Positioning structure, 4-Coil assembly, 5-Extension structure, 6-Socket structure, 7-Planar coil, 8-Flange cover. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Figure 1 This is a schematic diagram of an existing stellarator fusion device. Figure 1The diagram illustrates the positional relationship between plasma a, vacuum chamber b, and vacuum chamber port c in a stellarator. This invention provides an integrated multidimensional magnetic field compensation device, which is integrally mounted on the outside of the vacuum chamber port of a magnetic confinement fusion device and coaxially arranged along the port's axis. Without damaging the interior of the vacuum chamber, the integrated multidimensional magnetic field compensation device forms an integrated load-bearing and mounting structure around the vacuum chamber port. By integrating multiple sets of magnetic field compensation coils on the outer surface of the vacuum chamber port, it achieves independent control and precise compensation of the local three-dimensional magnetic field components in the vacuum chamber port region.

[0023] The integrated multidimensional magnetic field compensation device provided in this application will be described below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0024] Figure 2 This is a structural cross-sectional schematic diagram of the integrated multidimensional magnetic field compensation device according to an embodiment of the present invention.

[0025] like Figure 2 As shown, the integrated multidimensional magnetic field compensation device of this invention includes: a sealing flange 1, a housing 2, a positioning structure 3, multiple coil groups 4, an extension structure 5, a sleeve structure 6, and a planar coil 7.

[0026] The sealing flange 1 and flange cover plate 8 are used to achieve port closure, coil fixation and overall structure locking.

[0027] Outer shell 2 is used to connect with the vacuum chamber shell and form a load-bearing and sealing structure; Positioning structural component 3 is used to limit the position of sleeve structural component 6 in the axial direction; Coil group 4 is installed inside the outer surface of sleeve structure 6 and is used to generate transverse magnetic field component; Extension structural member 5 is used to achieve vacuum sealing and form an axial reference for the port; The sleeve structure 6 is disposed in the sealed space formed between the extension structure 5 and the outer shell 2, and is used to carry multiple coil groups 4, which are magnetic field compensation coils. Planar coil 7, located inside sealing flange 1, is used to generate a magnetic field component parallel to the axial direction of extension structure 5.

[0028] The specific connection relationships of each component are as follows: like Figure 2 As shown, the fixed planar coil 7 is laid in the groove around the sealing flange 1; the sealing flange 1 is aligned and tightly connected with the outer shell 2.

[0029] The planar coil 7 is formed by winding multiple strands of wire. The specific number of strands can be set by those skilled in the art according to actual needs, and this embodiment does not impose specific limitations on this. Preferably, as Figure 2As shown, the integrated multidimensional magnetic field compensation device may also include a flange cover plate 8. The sealing flange 1 is used to seal, fix, and tighten the entire vacuum chamber port. (As shown...) Figure 3 As shown in the exploded view of the sealing area of ​​the integrated multidimensional magnetic field compensation device, a circular groove is reserved between the sealing flange 1 and the flange cover plate 8 to accommodate and fix the planar coil 7, and the flange cover plate 8 is used for sealing. It should be noted that the groove is not limited to a circular groove, but can also be a square groove or a triangular groove, as long as it can accommodate and fix the planar coil 7. This application embodiment does not impose specific limitations on this.

[0030] In an alternative embodiment, the flange cover 8 includes cylindrical countersunk screw holes aligned with threaded holes on the sealing flange 1, and the flange cover 8 is fastened to the sealing flange by bolts. This fastening method facilitates disassembly.

[0031] like Figure 2 As shown, the end of the sealing flange 1 near the outer shell 2 is connected to the top of the extension structure 5. The end of the extension structure 5 is tightly fitted to the outer shell 2, sealing the interior of the vacuum chamber. The extension structure 5 is a hollow, bottom-closed cylindrical shape. The diameter of the middle and top of the extension structure 5 is smaller than the inner diameter of the outer shell 2. The extension structure 5 and the outer shell 2 together form an annular space, which can also be called an annular thin-walled space. The planar coil 7 generates a parallel magnetic field parallel to the axis of the extension structure 5. The parallel magnetic field performs magnetic field correction and compensation in the z-direction.

[0032] Combination Figure 2 as well as Figure 4 The internal structure diagram of the integrated multidimensional magnetic field compensation device after removing the outer shell is shown. The sleeve structure 6 is sleeved in the annular space outside the extension structure 5 and is tightly fitted with the outer surface of the extension structure 5 and the inner surface of the outer shell 2, thus fixing the radial position of the sleeve structure 6. The positioning structure 3 is sleeved on the outside of the extension structure 5. The inner diameter of the positioning structure 3 is equal to the outer diameter of the extension structure 5. The top and bottom ends of the positioning structure 3 are tightly fitted with the sealing flange 1 and the side of the sleeve structure 6 near the sealing flange 1, respectively. The positioning structure 3 is used to limit the axial position of the sleeve structure 6 in the annular space.

[0033] In practical implementation, the positioning structure 3 can be set as a positioning cylinder, the sleeve structure 6 can be set as a hollow cylindrical component, i.e., a sleeve, and the extension structure 5 can be set as an extension cylinder. The inner diameter of the sleeve is equal to the outer diameter of the extension cylinder, and the outer diameter of the sleeve is equal to the inner diameter of the outer shell. The positioning cylinder is set as a hollow cylinder, and the inner diameter of the positioning cylinder is equal to the outer diameter of the extension cylinder, so that it can fit perfectly on the outer surface of the extension cylinder. In addition, its length is just enough to fill the space between the sleeve and the sealing flange. Its top and bottom are in close contact with the sealing flange and the sleeve, respectively. After the sealing flange is installed, it can completely restrict the axial position of the sleeve.

[0034] The outer surface of the sleeve structure 6 includes multiple symmetrically arranged concave spaces, each concave space is used to place a coil group 4; the coil groups arranged opposite each other generate magnetic fields in the same direction, that is, two opposing coil groups contribute magnetic fields in the same direction; the coil groups arranged perpendicularly to each other generate vertical magnetic fields, and the vertical magnetic fields perform magnetic field correction and compensation in the x and y directions.

[0035] The specific shapes and dimensions of the positioning structure 3, the extension structure 5, and the sleeve structure 6 can be flexibly set by those skilled in the art according to the port dimensions, and no specific restrictions are imposed on them in the embodiments of this application.

[0036] In one optional embodiment, the outer surface of the sleeve structure 6 includes four symmetrically arranged concave spaces; each of the four concave spaces holds a coil group 4; the positions of each coil group are 90 degrees apart. In another optional embodiment, the outer surface of the sleeve structure 6 includes eight symmetrically arranged concave spaces; each of the eight concave spaces holds a coil group 4; the positions of each coil group are 45 degrees apart.

[0037] It should be noted that the specific number of concave spaces contained on the outer surface of the sleeve structure is not limited to 4 or 8, but can also be other numbers such as 16.

[0038] In one optional embodiment, the positioning structure 3 is a positioning cylinder; the extension structure 5 is an extension cylinder; and the sleeve structure 6 is a sleeve. All three structures are configured as cylindrical structures.

[0039] In one alternative embodiment, a detailed schematic diagram of the sleeve region is shown below. Figure 5 As shown, the sleeve area includes a sleeve structure 6 and a coil group 4. The sleeve structure 6 is a sleeve, and the coils in the coil group 4 are saddle-shaped coils. The outer surface of the sleeve includes four symmetrically arranged concave spaces; each of the four concave spaces holds a group of saddle-shaped coils; the positions of each group of saddle-shaped coils differ by 90 degrees. Specifically, four arc-shaped planes for placing the coils can be carved into the outer surface of the sleeve. The depth of the platform is sufficient to allow the saddle-shaped coils to be completely placed within it, and the outermost width will not be wider than the outer diameter of the sleeve.

[0040] The outer casing 2 is a hollow, three-dimensional structure that can be mounted on the vacuum chamber shell and contain and support other working structures. It should be able to maintain the airtightness of the vacuum chamber and bear the load of other working structures. The front surface of the outer casing 2 has a ring of threaded holes, which allows the sealing flange 1 to be tightly connected to it by bolts.

[0041] The shape of the outer shell 2 can be flexibly set according to the shape of the positioning structure, the extension structure and the sleeve structure. For example, when all three are cylindrical, the outer shell is set as a hollow cylindrical structure; when all three are cuboid, the outer shell is set as a hollow cuboid structure.

[0042] In one alternative embodiment, the inner surface of the sealing flange 1 includes a raised structure; the raised structure restricts the position of the sealing flange 1 relative to the housing 2 and restricts the position of the extension structure 5 relative to the sealing flange 1.

[0043] The following is combined with Figures 4-6 Taking the positioning structure 3 as the positioning cylinder, the extension structure 5 as the extension cylinder, and the sleeve structure 6 as the sleeve as an example, the installation and connection methods of each component in the integrated multidimensional magnetic field compensation device are illustrated by way of example: The outer casing 2 is fixedly installed on the outside of the vacuum chamber port of the magnetic confinement fusion device, and its front end face is provided with a ring of threaded holes for bolt connection with the sealing flange 1.

[0044] The extension structure 5 is a hollow, closed-bottom cylindrical structure, with its end fitting into the vacuum chamber shell to achieve a seal inside the vacuum chamber. The axis of the extension structure 5 is coaxial with the axis of the vacuum chamber port.

[0045] The sleeve structure 6 is disposed in the annular space formed between the extension structure 5 and the outer shell 2. Its inner surface is in contact with the outer surface of the extension structure, and its outer surface is in contact with the inner surface of the outer shell, thereby achieving stable positioning in the radial direction.

[0046] The positioning structure 3 is sleeved on the outside of the extension structure 5, and its length fills the axial space between the sleeve structure 6 and the sealing flange 1. After the sealing flange 1 is installed, the upper and lower end faces of the positioning structure 3 contact the sealing flange 1 and the sleeve structure 6 respectively, thereby restricting the axial degree of freedom of the sleeve structure 6.

[0047] The sealing flange 1 is installed at the front end of the housing 2. Its inner protruding structure is used to cooperate with the extension structure 5 and the positioning structure 3 to achieve coaxial positioning of the entire device. The flange cover plate 8 is connected to the sealing flange 1 by bolts and is used to encapsulate and fix the planar coil 7.

[0048] The isometric drawing of the assembled integrated multidimensional magnetic field compensation device can also be called the appearance drawing, such as... Figure 6 As shown.

[0049] The working principle of the integrated multidimensional magnetic field compensation device is as follows: During the operation of the integrated multidimensional magnetic field compensation device, each group of coils is driven by an independent power supply to form a controllable local magnetic field component in the port area of ​​the vacuum chamber. The planar coil 7 installed inside the sealing flange and the coil group 4 installed on the outer surface of the sleeve structure are used for magnetic field regulation and compensation in the area near the port.

[0050] When the planar coil 7 is energized, a magnetic field component B_z is generated in the direction of the port axis, which is used to compensate for the axial magnetic field error in the port region of the vacuum chamber. The coil groups 4 set on the outer surface of the sleeve structure are arranged in pairs and energized respectively, generating two mutually orthogonal magnetic field components B_x and B_y in the port cross section, which are used to compensate for the transverse magnetic field error in the port area of ​​the vacuum chamber.

[0051] By independently adjusting the magnitude and direction of the current in each group of coils, the superposition and control of three-dimensional magnetic field components can be achieved in the local area of ​​the vacuum chamber port, thereby providing fine compensation for the local error magnetic field caused by the geometry, processing errors and assembly deviations of the vacuum chamber port.

[0052] The integrated multidimensional magnetic field compensation device provided in this application embodiment includes a fixed planar coil laid in the groove around the sealing flange to generate a parallel magnetic field parallel to the axial direction of the extension structure. The parallel magnetic field corrects and compensates for the magnetic field in the z-direction. A sleeve structure is fitted into the annular space outside the extension structure and is tightly fitted to the outer surface of the extension structure and the inner surface of the outer shell, fixing the radial position of the sleeve structure. A positioning structure is fitted into the outside of the extension structure, with its top and bottom ends tightly fitted to the sealing flange to limit the axial position of the sleeve structure in the annular space. The outer surface of the sleeve structure includes multiple symmetrically arranged concave spaces, each concave space for placing a set of coils. The coils arranged opposite each other generate a magnetic field in the same direction. The coils arranged perpendicularly to each other generate a vertical magnetic field, which corrects and compensates for the magnetic field in the x and y directions. The device is installed on the outside of the vacuum chamber port of the magnetic confinement fusion device and arranged coaxially along the port axis. Without damaging the inside of the vacuum chamber of the magnetic confinement fusion device, the device forms an integrated load-bearing and installation structure around the vacuum chamber port. By integrating multiple sets of magnetic field compensation coils on the outer surface of the port, it can achieve independent control and fine compensation of the local three-dimensional magnetic field components in the port area, thereby further improving the space utilization of the magnetic confinement fusion device.

[0053] This application also provides a magnetic confinement fusion device, which includes multiple vacuum chamber ports. The magnetic confinement fusion device includes any of the above-mentioned integrated multidimensional magnetic field compensation devices. The integrated multidimensional magnetic field compensation device is installed on the outside of the vacuum chamber port and is coaxial with the vacuum chamber port along the axial direction of the vacuum chamber port.

[0054] The integrated multidimensional magnetic field compensation device provided in this application embodiment is an externally mounted local three-dimensional magnetic field compensation device at the port of the vacuum chamber of a magnetic confinement fusion device. Based on a combination of planar coils and multiple sets of non-planar coils, such as saddle-shaped coils, this device achieves independent control of the port region's B_x, B_y, and B_z, effectively solving the problem of local high-order error magnetic field compensation caused by the port in a magnetic confinement fusion device. Furthermore, this device can achieve independent control of the local three-dimensional magnetic field components in the port region of the vacuum chamber of the magnetic confinement fusion device without entering the vacuum chamber, avoiding the need for coil replacement and maintenance inside the vacuum chamber. Structurally, the integrated multidimensional magnetic field compensation device adopts a modular structure of sleeve-positioning cylinder-sealing flange, enabling high-precision positioning and operation of the coils.

[0055] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0056] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An integrated multidimensional magnetic field compensation device, characterized in that, The integrated multidimensional magnetic field compensation device is installed outside the vacuum chamber port of the magnetic confinement fusion device and is coaxial with the vacuum chamber port along the axis of the vacuum chamber port; the integrated multidimensional magnetic field compensation device includes: sealing flange (1), shell (2), positioning structure (3), multiple coil groups (4), extension structure (5), sleeve structure (6), and planar coil (7). The planar coil (7) is laid in the groove around the sealing flange (1); the sealing flange (1) is aligned and fastened to the outer shell (2); The extension structure (5) is a hollow, closed-bottom cylindrical shape. The end of the sealing flange (1) near the outer shell (2) is connected to the top of the extension structure (5). The end of the extension structure (5) is tightly fitted to the outer shell (2). The diameter of the middle and top of the extension structure (5) is smaller than the inner diameter of the outer shell (2). The extension structure (5) and the outer shell (2) are fitted together to form an annular space. The planar coil (7) generates a parallel magnetic field parallel to the axial direction of the extension structure (5). The parallel magnetic field performs magnetic field correction and compensation in the z direction. The sleeve structure (6) is sleeved in the annular space outside the extension structure (5) and is tightly fitted with the outer surface of the extension structure (5) and the inner surface of the outer shell (2), so that the radial position of the sleeve structure (6) is fixed. The positioning structure (3) is sleeved on the outside of the extension structure (5). The inner diameter of the positioning structure (3) is equal to the outer diameter of the extension structure (5). The top and bottom of the positioning structure (3) are tightly fitted to the sealing flange (1) and the sleeve structure (6) on the side close to the sealing flange (1), respectively. The positioning structure (3) is used to limit the axial position of the sleeve structure (6) in the annular space. The outer surface of the sleeve structure (6) includes a plurality of symmetrically arranged concave spaces, each of which is used to place a coil group (4); the coil groups arranged opposite each other generate a magnetic field in the same direction; the coil groups arranged perpendicularly to each other generate a vertical magnetic field, and the vertical magnetic field is corrected and compensated in the x and y directions; The planar coil (7) and each coil group (4) are driven by an independent power supply to form a controllable local magnetic field component.

2. The integrated multidimensional magnetic field compensation device according to claim 1, characterized in that, The device also includes a flange cover (8). The flange cover (8) includes cylindrical screw countersunk holes aligned with threaded holes on the sealing flange (1), and the flange cover (8) is fastened to the sealing flange (1) by bolts.

3. The integrated multidimensional magnetic field compensation device according to claim 1, characterized in that, The inner surface of the sealing flange (1) includes a raised structure; The raised structure restricts the position of the sealing flange (1) relative to the housing (2) and restricts the position of the extension structure (5) relative to the sealing flange (1).

4. The integrated multidimensional magnetic field compensation device according to claim 1, characterized in that, The positioning structure (3) is a positioning cylinder; The extension structure (5) is an extension cylinder, and the sleeve structure (6) is a sleeve.

5. The integrated multidimensional magnetic field compensation device according to claim 1, characterized in that, The planar coil (7) is made of multiple strands of wire wound together.

6. The integrated multidimensional magnetic field compensation device according to claim 1, characterized in that, The outer surface of the sleeve structure (6) includes four symmetrically arranged concave spaces; each of the four concave spaces holds one of the coil groups (4); the positions of each coil group are 90 degrees apart.

7. The integrated multidimensional magnetic field compensation device according to claim 6, characterized in that, The coils in the coil group (4) are saddle-shaped coils.

8. The integrated multidimensional magnetic field compensation device according to claim 1, characterized in that, The outer surface of the sleeve structure (6) includes eight symmetrically arranged concave spaces; each of the eight concave spaces holds one of the coil groups (4); the positions of each coil group are 45 degrees apart.

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