High-precision scanning magnet for low-field hyperfrequency

Abstract

The application relates to the technical field of particle accelerators, in particular to a high-precision scanning magnet suitable for low-field ultra-high frequency. The scanning magnet comprises a magnet module provided with a core assembly and a coil assembly; a support module provided with a support base, a first support assembly and a second support assembly; the first support assembly and the second support assembly are respectively in sliding connection with the support base and arranged in a straight line, the core assembly is fixed to the first support assembly, the coil assembly is fixed to the second support assembly, and the core assembly and the coil assembly are not in contact with each other. In the application, the structure of the scanning magnet is optimized, different support assemblies are used to independently support the core assembly and the coil assembly, high-frequency vibration of the coil assembly can be avoided to cause damage to the core assembly under the condition of ultra-high frequency operation, the magnetic field precision of the scanning magnet can be improved, and therefore the scanning magnet can stably and accurately scan the particle beam for a long time.

Description

Technical Field

[0001] This invention relates to the field of particle accelerator technology, and in particular to a high-precision scanning magnet suitable for low-field ultra-high frequency applications. Background Technology

[0002] Scanning magnets are a type of magnet that must be installed at the end of a particle accelerator. By precisely controlling the magnitude and direction of the magnetic field applied by the scanning magnet, the particle beam can be deflected along a predetermined path. Typically, a scanning magnet consists of two magnets, an X-axis magnet and a Y-axis magnet, with their magnetic fields perpendicular to each other. Using the X-axis and Y-axis magnets, the position of the particle beam on a two-dimensional plane can be freely controlled, thereby scanning the beam into a square field of view (uniform scanning) or rapidly scanning it into a discrete lattice of points within the plane (point scanning).

[0003] Currently, scanning magnets used in low-field (air gap magnetic field < 1000 Gauss) and ultra-high frequency (uniform scanning repetition frequency or local frequency > 10kHz in point scanning mode) applications are generally silicon steel sheet laminated iron core magnets or pure coil magnets.

[0004] However, silicon steel laminated iron core magnets may experience problems such as high core temperature, magnetic field and delay distortion during use, resulting in low stability and insufficient scanning accuracy during long-term operation. At the same time, pure coil magnets have low magnetic field accuracy, which cannot meet the requirements of high-precision scanning. Summary of the Invention

[0005] This invention aims to solve the technical problems existing in related technologies. To this end, this invention proposes a high-precision scanning magnet suitable for low-field ultra-high frequency applications. By optimizing the structure of the iron core and coil, it solves the problems of high iron core temperature, magnetic field distortion, and delay distortion that occur in existing scanning magnets during use.

[0006] This invention provides a high-precision scanning magnet suitable for low-field ultra-high frequency applications, comprising:

[0007] Magnet module, including core assembly and coil assembly;

[0008] The support module includes a support base, a first support component, and a second support component.

[0009] The first support component and the second support component are slidably connected to the support base, and the first support component is disposed between the two second support components. The iron core component is fixed to the first support component, and the coil component is fixed to the second support component. The iron core component and the coil component do not contact each other.

[0010] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the iron core assembly is provided with a through-hole in the middle and the coil assembly is configured as a saddle-shaped structure.

[0011] The coil assembly is inserted through the through-hole of the iron core assembly, and both ends of the coil assembly protrude from the iron core assembly and are respectively connected to the second support assembly.

[0012] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the core assembly comprises:

[0013] Ferrite is made by pressing powder;

[0014] The frame is provided with a groove extending from one end of the frame to the other end of the frame;

[0015] The ferrite is configured in a U-shape to fit the groove, and a plurality of the ferrites are stacked in the frame along the extension direction of the groove.

[0016] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the core assembly further includes:

[0017] The first buffer is sandwiched between two adjacent ferrites;

[0018] The second buffer is sandwiched between the ferrite and the groove;

[0019] The first and second buffer components are made of polytetrafluoroethylene.

[0020] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the coil assembly includes:

[0021] Windings are used to generate a magnetic field;

[0022] Saddle-shaped bracket, made of G10 material;

[0023] The saddle-shaped support includes two saddle bridges and two saddle winglets stacked one on top of the other. The saddle bridges and the saddle winglets are perpendicular to each other and connected at their respective ends. The two saddle-shaped supports are symmetrically arranged and abut against each other with the saddle winglets, forming a channel extending along the length of the saddle winglets, so that the particle beam can pass through the middle of the coil assembly.

[0024] The winding extends circumferentially along the saddle-shaped bracket and is embedded inside the saddle-shaped bracket.

[0025] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the coil assembly further includes a bracket with a window in the middle, two brackets are respectively installed at both ends of the saddle-shaped bracket, and the window is aligned with the channel;

[0026] The second support component is connected to the bracket.

[0027] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the saddle-shaped bracket is configured to be composed of a first frame and a second frame spliced ​​together, and the winding is sandwiched between the first frame and the second frame.

[0028] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the winding is formed by a square-section wire extending along the circumference of the saddle-shaped bracket and being wound outward turn by turn to form a single-layer structure;

[0029] The width of the conductor is at least one-sixth of the cross-sectional width of the saddle-shaped bracket so that the number of turns of the winding is less than or equal to 6.

[0030] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the winding further includes a channel extending along the conductor and penetrating both ends of the conductor, the channel being located at the center of the conductor for circulating cooling water.

[0031] According to the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency is provided, wherein the magnet module includes an X-axis magnet and a Y-axis magnet for forming magnetic fields in two mutually perpendicular directions respectively;

[0032] Multiple X-axis magnets and multiple Y-axis magnets are arranged in a straight line on the top surface of the support base.

[0033] The above-described one or more technical solutions of this invention have at least one of the following technical effects:

[0034] By optimizing the scanning magnet structure and using different support components to independently support the core assembly and coil assembly, it is possible to avoid damage to the core assembly caused by high-frequency vibration of the coil assembly under ultra-high frequency operation conditions, and to improve the magnetic field accuracy of the scanning magnet, thereby ensuring that the scanning magnet can perform high-precision scanning of the particle beam stably for a long time.

[0035] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical features of these technical solutions as described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings, or will be learned through the practice of the present invention. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a three-dimensional structural diagram of a high-precision scanning magnet suitable for low-field ultra-high frequency, provided as an embodiment of the present invention.

[0038] Figure 2 This is a partial breakdown diagram of the scanning magnet provided in an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram showing the disassembled magnet module provided in an embodiment of the present invention.

[0040] Figure 4 This is a schematic diagram of the iron core assembly provided in an embodiment of the present invention when the metal shell is not covered by the frame.

[0041] Figure 5 This is a partial disassembly diagram of the iron core assembly provided in an embodiment of the present invention.

[0042] Figure 6 This is a schematic diagram showing the disassembled saddle-shaped bracket provided in an embodiment of the present invention.

[0043] Figure 7 This is a three-dimensional structural schematic diagram of another high-precision scanning magnet suitable for low-field ultra-high frequency, provided as an embodiment of the present invention.

[0044] Figure label:

[0045] 100. Magnet module; 100a. X-axis magnet; 100b. Y-axis magnet; 110. Core assembly; 111. Ferrite; 112. Frame; 113. First buffer; 114. Second buffer; 115. Stop; 116. Metal shell; 120. Coil assembly; 121. Winding; 122. Bracket; 123. Saddle-shaped bracket; 1231. Saddle bridge; 1232. Saddle wing; 123a. First frame; 123b. Second frame; 200. Support module; 210. Support base; 220. First support assembly; 230. Second support assembly. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0047] In embodiments of the present invention, a high-precision scanning magnet suitable for low-field ultra-high frequency applications is described. For example... Figures 1 to 3 As shown, the scanning magnet includes a magnet module 100 and a support module 200.

[0048] The magnet module 100 is provided with an iron core assembly 110 and a coil assembly 120. The support module 200 is provided with a support base 210, a first support assembly 220 and a second support assembly 230.

[0049] The first support component 220 and the second support component 230 are slidably connected to the support base 210. Furthermore, the first support component 220 and the second support component 230 are arranged in a straight line on the top of the support base 210. The first support component 220 is disposed between the two second support components 230.

[0050] The core assembly 110 is fixed to the first support assembly 220. The coil assembly 120 is fixed to the second support assembly 230. The core assembly 110 and the coil assembly 120 do not contact each other.

[0051] Specifically, the core assembly 110 has a through-hole in the middle. The coil assembly 120 is configured with a saddle-shaped structure.

[0052] The coil assembly 120 is inserted through the through-hole of the iron core assembly 110. Both ends of the coil assembly 120 protrude from the iron core assembly 110. Furthermore, both ends of the coil assembly 120 are respectively connected to the second support assembly 230. Thus, when the coil assembly 120 is inserted through the through-hole of the iron core assembly 110, a gap is maintained between the coil assembly 120 and the iron core assembly 110 to avoid collisions due to vibration during ultra-high frequency operation. This completely decouples the iron core assembly 110 and the coil assembly 120 mechanically, preventing the vibration generated by the coil assembly 120 under high-frequency excitation from being transmitted to the iron core assembly 110. This not only prevents material fatigue or damage to the iron core assembly 110 due to vibration but also improves the dynamic stability of the magnetic field.

[0053] Furthermore, the core assembly 110 can also be configured as an H-shaped structure. Correspondingly, the coil assembly 120 is configured as a racetrack-shaped structure with a through-hole in the middle. The coil assembly 120 is sleeved on the core assembly 110. Both ends of the core assembly 110 protrude from the coil assembly 120. Furthermore, both ends of the core assembly 110 are respectively connected to the first support assembly 220.

[0054] Furthermore, by rotating the coil assembly 120 around the central axis of the through-hole in the iron core assembly 110, the direction of the magnetic field of the coil assembly 120 can be adjusted. In order to freely control the deflection direction of the particle beam in a two-dimensional plane, the magnet module 100 includes an X-axis magnet 100a and a Y-axis magnet 100b, which are used to generate magnetic fields in two mutually perpendicular directions respectively.

[0055] The deflection of the particle beam in the X-axis direction can be controlled by adjusting the magnetic field strength of the X-axis magnet 100a. The deflection of the particle beam in the Y-axis direction can be controlled by adjusting the magnetic field strength of the Y-axis magnet 100b.

[0056] like Figure 7 As shown, multiple X-axis magnets 100a and multiple Y-axis magnets 100b are arranged in a straight line on the top surface of the support base 210. The linear arrangement of the X-axis magnets 100a and Y-axis magnets 100b along the support base 210 facilitates quick centering and fine-tuning of the magnet module 100.

[0057] In this embodiment, by optimizing the scanning magnet structure, different support components are used to independently support the core assembly 110 and the coil assembly 120. This not only avoids damage to the core assembly 110 caused by the high-frequency vibration of the coil assembly 120 under ultra-high frequency operation conditions, but also improves the magnetic field accuracy of the scanning magnet, thereby ensuring that the scanning magnet can perform high-precision scanning of the particle beam stably for a long time.

[0058] Based on the above embodiments, another embodiment of the present invention introduces a high-precision scanning magnet suitable for low-field ultra-high frequency.

[0059] like Figure 4 and Figure 5 As shown, the core assembly 110 mainly includes a ferrite 111, a frame 112, a stop 115, and a metal shell 116.

[0060] Ferrite 111 is made using a powder pressing process, which gives it extremely high resistivity. This not only suppresses the eddy current effect in the iron core but also avoids eddy current losses caused by magnetic field components.

[0061] The frame 112 has a groove extending from one end of the frame 112 to the other end. Thus, two frames 112 connected with their grooves facing each other form a ring structure with a through opening in the middle. Specifically, to reduce interference from external magnetic fields on the core assembly 110, the outer surface of the frame 112 is also covered with a metal shell 116. Preferably, the metal shell 116 is made of copper.

[0062] The ferrite 111 is configured in a U-shape to fit the groove. A plurality of ferrites 111 are stacked within the frame 112 along the extending direction of the groove. To prevent the ferrites 111 from detaching from the groove along its extending direction, stoppers 115 are provided at both ends of the groove. The stacking structure of the ferrites 111 within the frame 112 and the metal casing 116 complement each other to ensure the uniformity of the magnetic field distribution and anti-interference capability, thereby improving scanning accuracy and stability.

[0063] Furthermore, to prevent damage to two adjacent ferrite blocks 111 and the ferrite block 111 and the frame 112 due to mutual collision, the core assembly 110 also includes a first buffer 113 and a second buffer 114.

[0064] The first buffer 113 is sandwiched between two adjacent ferrites 111. The second buffer 114 is sandwiched between the ferrite 111 and the groove.

[0065] The first buffer 113 and the second buffer 114 are made of polytetrafluoroethylene. The first buffer 113 and the second buffer 114 are flat plates with a thickness of 0.5 mm.

[0066] Based on the above embodiments, another embodiment of the present invention introduces a high-precision scanning magnet suitable for low-field ultra-high frequency.

[0067] The magnet module 100 is provided with an iron core assembly 110 and a coil assembly 120. The support module 200 is provided with a support base 210, a first support assembly 220 and a second support assembly 230.

[0068] The first support component 220 and the second support component 230 are slidably connected to the support base 210. Furthermore, the first support component 220 and the second support component 230 are arranged in a straight line on the top of the support base 210.

[0069] The core assembly 110 is fixed to the first support assembly 220. The coil assembly 120 is fixed to the second support assembly 230. The core assembly 110 and the coil assembly 120 do not contact each other. Figure 4 and Figure 5As shown, the core assembly 110 mainly includes a ferrite 111, a frame 112, a stop 115, and a metal shell 116.

[0070] Several ferrites 111 are stacked within the frame 112 along the extending direction of the groove. The ferrites 111 are manufactured using a powder pressing process, which can suppress the eddy current effect generated by the magnetic field in the iron core body and reduce the energy loss of the iron core due to heat generation.

[0071] like Figure 3 and Figure 6 As shown, the coil assembly 120 includes a winding 121 and a saddle-shaped support 123. The winding 121 is used to generate a magnetic field. The saddle-shaped support 123 is made of G10 material and serves as a support structure for the winding 121.

[0072] The saddle-shaped support 123 includes two saddle bridges 1231 and two saddle winglets 1232 stacked vertically. The saddle bridges 1231 and the saddle winglets 1232 are perpendicular to each other. Furthermore, the saddle bridges 1231 and the saddle winglets 1232 are connected at their respective ends to form a ring structure.

[0073] Specifically, the saddle bridge 1231 and the saddle wing 1232 are located at different heights. The two saddle-shaped supports 123 are symmetrically arranged and abut against each other with the saddle wing 1232, forming a channel extending along the length of the saddle wing 1232. The channel extends through both ends of the coil assembly 120 along the extension direction of the saddle wing 1232, allowing the particle beam to pass through the middle of the coil assembly 120.

[0074] The winding 121 extends circumferentially along the saddle-shaped bracket 123. Furthermore, the winding 121 is embedded inside the saddle-shaped bracket 123.

[0075] Specifically, when manufacturing the coil assembly 120, a saddle-shaped bracket 123 with an internal cavity is first made using G10 material. Then, a square wire is passed through the saddle-shaped bracket 123 and wound to form a winding 121, so that the G10 material wraps around the winding 121 and combines them into one, thereby greatly improving the stability of the coil assembly 120.

[0076] Furthermore, the coil assembly 120 also includes a bracket 122 with a window in the middle. The two brackets 122 are respectively mounted at both ends of the saddle-shaped bracket 123, and the window is aligned with the channel.

[0077] The second support component 230 is connected to the bracket 122.

[0078] Preferably, to facilitate the assembly and disassembly of the winding 121, the saddle-shaped bracket 123 can also be configured to be composed of a first frame 123a and a second frame 123b spliced ​​together. The winding 121 is sandwiched between the first frame 123a and the second frame 123b.

[0079] To enable the coil assembly 120 to operate at ultra-high frequencies, the winding 121 adopts a design structure with a small number of turns and a large current. Specifically, the winding 121 is a single-layer structure formed by extending a square-section wire along the circumference of the saddle-shaped bracket 123 and winding it outward turn by turn.

[0080] The conductor width is at least one-sixth of the cross-sectional width of the saddle-shaped bracket 123 so that the number of turns of the winding 121 is less than or equal to 6.

[0081] In addition, to facilitate cooling of the coil assembly 120, a channel is provided in the center of the conductor. The channel extends along the conductor and passes through both ends of the conductor, through which cooling water can be circulated to the coil assembly 120.

[0082] In this embodiment, the winding 121 is made of a square wire with a central hole, which can enhance the response speed of the coil assembly 120 at high frequencies and improve the heat dissipation efficiency of the coil assembly 120, making the coil assembly 120 suitable for ultra-high frequency operating conditions.

[0083] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and 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 embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0084] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0085] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms are not limited to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision scanning magnet suitable for low-field ultra-high frequency, characterized in that, include: The magnet module (100) includes a core assembly (110) and a coil assembly (120). The support module (200) is provided with a support base (210), a first support component (220), and a second support component (230); The first support component (220) and the second support component (230) are slidably connected to the support base (210), and the first support component (220) is disposed between the two second support components (230). The iron core component (110) is fixed to the first support component (220), and the coil component (120) is fixed to the second support component (230). The iron core component (110) and the coil component (120) do not contact each other. The core assembly (110) has a through-hole in the middle, and the coil assembly (120) is configured as a saddle-shaped structure. The coil assembly (120) is inserted through the through-hole of the iron core assembly (110), and the two ends of the coil assembly (120) protrude from the iron core assembly (110) and are respectively connected to the second support assembly (230). The core assembly (110) includes: Ferrite (111) is formed by pressing powder; The frame (112) is provided with a groove extending from one end of the frame (112) to the other end of the frame (112); The ferrite (111) is configured in a "U" shape to fit the groove, and a plurality of the ferrites (111) are stacked in the frame (112) along the extension direction of the groove. The coil assembly (120) includes: The winding (121) is used to generate a magnetic field; Saddle-shaped bracket (123), material is G10; The saddle-shaped bracket (123) is configured to be composed of a first frame (123a) and a second frame (123b), and the winding (121) is sandwiched between the first frame (123a) and the second frame (123b); The winding (121) is formed by a square-section wire extending circumferentially along the saddle-shaped bracket (123) and winding outwards in turn to form a single-layer structure; The width of the conductor is at least one-sixth of the cross-sectional width of the saddle-shaped bracket (123) so that the number of turns of the winding (121) is less than or equal to 6.

2. The high-precision scanning magnet suitable for low-field ultra-high frequency as described in claim 1, characterized in that, The core assembly (110) also includes: The first buffer (113) is sandwiched between two adjacent ferrites (111); The second buffer (114) is sandwiched between the ferrite (111) and the groove; The first buffer (113) and the second buffer (114) are made of polytetrafluoroethylene.

3. The high-precision scanning magnet suitable for low-field ultra-high frequency as described in claim 1 or 2, characterized in that, The saddle-shaped support (123) includes two saddle bridges (1231) and two saddle winglets (1232) stacked vertically. The saddle bridges (1231) and the saddle winglets (1232) are perpendicular to each other and connected at their respective ends. The two saddle-shaped supports (123) are symmetrically arranged and abut against each other with the saddle winglets (1232) to form a channel extending along the length of the saddle winglets (1232) so that the particle beam can pass through the middle of the coil assembly (120). The winding (121) extends circumferentially along the saddle-shaped bracket (123) and is embedded inside the saddle-shaped bracket (123).

4. The high-precision scanning magnet suitable for low-field ultra-high frequency as described in claim 3, characterized in that, The coil assembly (120) also includes a bracket (122) with a window in the middle, two brackets (122) are respectively installed at both ends of the saddle-shaped bracket (123), and the window is aligned with the channel; The second support component (230) is connected to the bracket (122).

5. The high-precision scanning magnet suitable for low-field ultra-high frequency as described in claim 3, characterized in that, The winding (121) also includes a channel extending along the conductor and penetrating both ends of the conductor, the channel being located at the center of the conductor for circulating cooling water.

6. The high-precision scanning magnet suitable for low-field ultra-high frequency as described in claim 4, characterized in that, The magnet module (100) includes an X-axis magnet (100a) and a Y-axis magnet (100b) for generating magnetic fields in two mutually perpendicular directions. Multiple X-axis magnets (100a) and multiple Y-axis magnets (100b) are arranged in a straight line on the top surface of the support (210).

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