Electromagnetic structure for plasma excitation

Abstract

The utility model discloses an electromagnetic structure for plasma excitation, and relates to the technical field of electromagnetic structures, and the electromagnetic structure comprises a lead outer sheath and an iron yoke structure. The iron yoke structures are spliced to form a circular ring shape, and the lead outer sheath is sleeved on the iron yoke structures; wherein the iron yoke structure comprises a first iron core, a coil, a coil assembly and second iron cores, the second iron cores are installed at the two ends of the first iron core respectively, the coil is arranged on the second iron cores in a sleeving mode, and the coil assembly is installed on the first iron core and the second iron cores. The device has an electromagnetic structure axial and radial restraining effect, and the effect of ensuring the stability of the plasma is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plasma excitation electromagnetic structure, and particularly relates to a plasma excitation electromagnetic structure. BACKGROUND

[0002] In the existing plasma excitation technology, common magnetic structures mainly include permanent magnetic structures and electromagnetic structures. The permanent magnetic structure is widely used due to its low cost and simple structure, and a required magnetic field distribution is usually formed by arranging permanent magnets. However, once the permanent magnetic structure is formed, the magnetic field strength and distribution are difficult to adjust, and it cannot adapt to the needs of different application scenarios. In addition, the permanent magnetic material also has a demagnetization risk, which limits its application in high-temperature and high-radiation environments. The electromagnetic structure generates a magnetic field through an electric current, and can realize flexible adjustment of the magnetic field strength and distribution, thereby better meeting the needs of various plasma excitations.

[0003] Although the electromagnetic structure has flexibility and adjustability, the existing electromagnetic structure can only provide axial magnetic field confinement, and lacks effective radial confinement, which leads to the instability of the plasma. Such unstable magnetic field distribution not only affects the generation efficiency and quality of the plasma, but also increases the maintenance difficulty and operation cost of the equipment. CONTENT OF THE UTILITY MODEL

[0004] In order to improve the problem that the lack of radial confinement of the electromagnetic structure leads to the instability of the plasma, the present application provides an electromagnetic structure for plasma excitation.

[0005] The electromagnetic structure for plasma excitation provided by the present application adopts the following technical scheme:

[0006] The electromagnetic structure for plasma excitation comprises a lead outer sheath and a Ferrite structure, the Ferrite structure is spliced to form a circular ring shape, and the lead outer sheath is sleeved on the Ferrite structure; wherein the Ferrite structure comprises a core one, a wire package, a wire package assembly and a core two, the core two is respectively installed at both ends of the core one, the wire package is sleeved on the core two, and the wire package assembly is installed on the core one and the core two.

[0007] By adopting the above technical scheme, the electromagnetic structure can generate a specific magnetic field distribution, effectively confine the plasma, promote the generation of the plasma and enhance the plasma density. Compared with the traditional permanent magnetic structure, the electromagnetic structure has higher flexibility, can conveniently adjust the magnetic field strength, avoids the problems of expensive and easy demagnetization of the permanent magnetic material, and at the same time, ensures the stability and uniformity of the magnetic field through the Ferrite structure and the wire package assembly, further improves the confinement effect of the plasma.

[0008] Optionally, the coil assembly includes a limiting ring and a protrusion, the protrusion being fixed to the first iron core, and the limiting ring being sleeved on multiple second iron cores that are spliced ​​together in a circular shape.

[0009] By adopting the above technical solutions, the uniformity and intensity of the magnetic field are effectively improved, thereby better confining the plasma, increasing the stability and density of the plasma, and making the winding of the coil on the bump more compact and orderly, improving the controllability and consistency of the magnetic field, and thus enhancing the confinement effect of the plasma.

[0010] Optionally, the coil is conical and hollow.

[0011] By adopting the above technical solutions, the axial confinement requirements of plasma can be better met, the magnetic field distribution can be optimized, and the lateral diffusion of plasma can be reduced, thereby improving the stability and density of plasma. The conical shape helps to reduce manufacturing costs and improve the compactness and reliability of the structure.

[0012] Optionally, the second iron core has an annular portion and a rod portion. One end of the rod portion is fixed to the first iron core, and the other end of the rod portion is fixed to the annular portion. Multiple annular portions are spliced ​​together to form a ring shape.

[0013] By adopting the above technical solution, iron core two and iron core one are stably connected together to form the required ring structure, which ensures the uniformity and stability of the magnetic field. This not only improves the overall strength of the electromagnetic structure but also enhances the ability to confine the plasma, effectively preventing the diffusion and loss of the plasma. The spliced ​​ring part is easy to assemble and maintain, improving manufacturing efficiency and reliability.

[0014] Optionally, the protrusions on the iron core are arranged in a ring shape at intervals, with adjacent protrusions spaced at 60 degrees.

[0015] By adopting the above technical solution, the hexagonal magnetic field is more uniformly distributed in the radial direction, thereby effectively enhancing the radial magnetic field strength, further improving the confinement capability of the plasma, and solving the problem of the instability of the plasma in the radial direction.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. By using a specially spliced ​​Tier eutectic structure and coil assembly to generate axial and radial magnetic fields, a composite magnetic field of a hexapole field in a magnetic mirror is formed, which enhances the axial and radial confinement of the plasma and reduces the occurrence of plasma instability problems;

[0018] 2. By using an electromagnetic structure to replace the permanent magnet structure, the magnetic field strength and distribution can be flexibly adjusted, reducing the occurrence of the problem of the non-adjustable magnetic field of the permanent magnet structure and improving the applicability and reliability of the electromagnetic structure for plasma excitation.

[0019] 3. The specific Tier 1 structure and coil assembly ensure precise control of the magnetic field distribution, improve plasma efficiency and quality, and reduce equipment maintenance and operating costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure shown in this application.

[0022] Figure 2 This is a cross-sectional view showing the overall structure of this application.

[0023] Figure 3 This is an exploded view showing the overall structure of this application.

[0024] Figure 4 This application presents a schematic diagram illustrating an axially confined magnetic field.

[0025] Figure 5 This application presents a schematic diagram illustrating the axial magnetic field distribution and the radial magnetic field distribution.

[0026] Figure 6 This application presents a schematic diagram illustrating the radial magnetic field distribution of a hexapolar magnetic field.

[0027] Reference numerals: 2. Lead outer sheath; 3. Tier 1 structure; 31. Core 1; 32. Coil; 33. Coil assembly; 34. Core 2; 331. Limiting ring; 332. Protrusion; 341. Annular part; 342. Rod body part. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0029] This application discloses an electromagnetic structure for plasma excitation.

[0030] The principle of ECR ​​ion sources is to use microwaves to heat plasma. Electrons gain energy from the microwaves to form high-energy electrons. These high-energy electrons collide with atoms or molecules, gradually ionizing them to form plasma. The plasma needs an external magnetic field to confine it and prevent ions from diffusing to the metal cavity walls and being lost.

[0031] The axial confinement magnetic field is a magnetic mirror field, as follows: Figure 4As shown, when a particle moves from a weak magnetic field region to a strong magnetic field region, its velocity in the direction perpendicular to the magnetic field lines increases while its velocity parallel to the magnetic field lines decreases. Due to the conservation of magnetic angular momentum, when the kinetic energy in the perpendicular direction increases to the total kinetic energy, the kinetic energy in the parallel direction becomes 0. The particle will no longer move in the direction of increasing magnetic field and will be reflected back to the region of weaker magnetic field. At this point, the plasma is confined within the magnetic mirror.

[0032] Reference Figure 1 and Figure 2 As shown, it consists of a lead outer sheath 2 and a ferroe structure 3. The ferroe structure 3 is spliced ​​to form a ring shape, and the lead outer sheath 2 is fitted on the ferroe structure 3. The lead outer sheath is used to shield X-rays, and the outer layer uses ordinary materials to improve the overall aesthetics. The ferroe structure 3 includes a first iron core 31, a coil 32, a coil assembly 33, and a second iron core 34. The second iron core 34 is installed at both ends of the first iron core 31. The coil 32 is fitted on the second iron core 34. The coil 32 is the coil of the axial field and is used to generate the axial magnetic field. The coil assembly 33 is installed on the first iron core 31 and the second iron core 34.

[0033] See Figure 3 As shown, the coil assembly 33 includes a limiting ring 331 and a protrusion 332. The protrusion 332 is fixed on the first iron core 31, and the limiting ring 331 is sleeved on multiple second iron cores 34 that are spliced ​​in a circular shape. The limiting ring 331 is made of a non-magnetic material to prevent the repulsive force after the first iron core 31 and the second iron core 34 are magnetized. This can effectively improve the uniformity and strength of the magnetic field, thereby better confining the plasma and improving the stability and density of the plasma. This makes the coil 32 more tightly and orderly wound around the protrusion 332, improving the controllability and consistency of the magnetic field, and thus enhancing the confinement effect of the plasma.

[0034] The conical, hollow lead outer sheath 2 better adapts to the axial confinement requirements of plasma, optimizes the magnetic field distribution, and reduces lateral plasma diffusion, thereby improving plasma stability and density. Simultaneously, the conical design helps reduce manufacturing costs and improves structural compactness and reliability.

[0035] See Figure 3 As shown, the second iron core 34 has an annular portion 341 and a rod portion 342. One end of the rod portion 342 is fixed to the first iron core 31, and the other end is fixed to the annular portion 341. Multiple annular portions 341 are spliced ​​together to form a ring shape. The second iron core 34 allows the first iron core 31 to be stably connected together to form the required ring structure, ensuring the uniformity and stability of the magnetic field. This not only improves the overall strength of the electromagnetic structure but also enhances the confinement capability of the plasma, effectively preventing plasma diffusion and loss. The spliced ​​annular portion 341 facilitates assembly and maintenance, improving manufacturing efficiency and reliability.

[0036] SeeFigure 6 As shown, the protrusions 332 on the iron core 31, which is spliced ​​into a ring, are arranged at intervals of 60 degrees. A radial hexapole field is superimposed on the axial magnetic confinement to generate a magnetic field that increases radially. The hexapole magnetic field is more evenly distributed in the radial direction, thereby effectively enhancing the radial magnetic field strength, further improving the confinement capability of the plasma, and reducing the occurrence of plasma instability problems in the radial direction.

[0037] See Figure 5 As shown, after superimposing the radial magnetic field, the axial magnetic field distribution and the radial magnetic field distribution, the minimum B magnetic field structure formed by superposition can increase the confinement of the plasma and reduce the occurrence of plasma instability.

[0038] The implementation principle of an electromagnetic structure for plasma excitation according to an embodiment of this application is as follows: The electromagnetic structure can generate a specific magnetic field distribution, effectively confining the plasma, promoting plasma generation and enhancing plasma density. The axial and radial magnetic fields generated by the specifically spliced ​​Tier 3 and coil assembly 33 form a composite magnetic field of magnetic mirror field and hexapole field, which improves the stability of the plasma. Compared with the traditional permanent magnet structure, this electromagnetic structure has higher flexibility and can easily adjust the magnetic field strength, avoiding the problems of expensive and easily demagnetized permanent magnet materials. The stability and uniformity of the magnetic field are ensured by the Tier 3 and coil assembly 33, which further improves the confinement effect of the plasma, ensures precise control of the magnetic field distribution, improves the efficiency and quality of the plasma, and reduces maintenance and operating costs.

[0039] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electromagnetic structure for plasma excitation, characterized in that: It includes a lead outer sheath (2) and a ferroe structure (3); the ferroe structure (3) is spliced ​​to form a ring shape, and the lead outer sheath (2) is fitted onto the ferroe structure (3); The iron core structure (3) includes a first iron core (31), a coil (32), a coil assembly (33), and a second iron core (34). The second iron core (34) is installed at both ends of the first iron core (31), the coil (32) is sleeved on the second iron core (34), and the coil assembly (33) is installed on the first iron core (31) and the second iron core (34).

2. The electromagnetic structure for plasma excitation according to claim 1, characterized in that: The coil assembly (33) includes a limiting ring (331) and a protrusion (332). The protrusion (332) is fixed on the first iron core (31), and the limiting ring (331) is sleeved on a plurality of second iron cores (34) that are spliced ​​in a circular shape.

3. The electromagnetic structure for plasma excitation according to claim 1, characterized in that: The coil (32) is conical and hollow.

4. The electromagnetic structure for plasma excitation according to claim 1, characterized in that: The second iron core (34) has an annular portion (341) and a rod portion (342). One end of the rod portion (342) is fixed to the first iron core (31), and the other end of the rod portion (342) is fixed to the annular portion (341). Multiple annular portions (341) are spliced ​​together to form a ring.

5. An electromagnetic structure for plasma excitation according to claim 4, characterized in that: The protrusions (332) on the iron core (31) are arranged in a ring shape at intervals, with adjacent protrusions spaced at 60 degrees.

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