Radiation-resistant dipole magnet for a particle accelerator

Abstract

The present application relates to a kind of anti-radiation dipole magnets for particle accelerator, comprising: iron core, using H-shaped structure;Coil, set in the iron core, and coil is raised at the both ends of iron core and forms saddle-shaped structure;Anti-radiation water pipe assembly is set in the outside of one end of iron core, and the outlet end of anti-radiation water pipe assembly is connected with the outgoing head of coil, to provide cooling water in coil, the inlet end of anti-radiation water pipe assembly is connected with external cooling device.The magnet of the present application makes up for the shortcomings of prior art, improves the operating stability of magnet in strong radiation environment and its service life, and simple structure, compact.

Description

Technical Field

[0001] This invention relates to the field of particle accelerator technology, and in particular to a radiation-resistant diode magnet for particle accelerators. Background Technology

[0002] Dipole magnets are common magnetic components in particle accelerators, primarily functioning to provide a high-quality dipole magnetic field to guide the deflection of charged particles within a certain range. Traditional dipole magnets are mostly water-cooled electromagnets, typically consisting of an iron core, coil, and water pipe assembly. To improve magnetic field strength and quality, the iron core is generally H-shaped, and the corresponding coil is typically racetrack-shaped. However, these traditional dipole magnet structures and designs are insufficient for operation under strong radiation environments, exhibiting the following problems: 1. The racetrack-shaped coil structure of the H-shaped magnet is subjected to high-intensity radiation from the particle beam at the magnet's end, severely threatening its lifespan; 2. The ordinary resin epoxy used in casting the coil has low radiation resistance, and prolonged exposure to strong radiation can lead to carbonization, peeling, and damage, potentially causing short circuits between coil turns; 3. Traditional water pipe assemblies contain a large amount of rubber and other organic materials, which, even after short-term operation under strong radiation, are highly susceptible to cracking and damage, negatively impacting the magnet's stable operation.

[0003] To address the above issues, engineers currently employ two main methods to improve the lifespan and operational stability of dipole magnets in high-radiation environments. One method involves adding lead, paraffin, and stainless steel blocks around the magnet to reduce radiation dose to critical areas. However, this method is highly susceptible to spatial and locational limitations, significantly reducing the expected "radiation protection" and yielding minimal results. The second method uses magnesium oxide copper wire to wind the coil. This effectively avoids degradation and damage to the inter-turn insulation in high-radiation environments. However, due to the complex processing and structure of magnesium oxide copper wire, insulation failure is a serious concern after coil fabrication. Furthermore, the large bending radius of the winding process consumes considerable space. Additionally, the limitations of traditional water pipe components for prolonged use in high-radiation environments remain unresolved.

[0004] In summary, there are still many problems and bottlenecks in improving the service life and operational stability of magnets in strong radiation environments, which is also one of the key engineering and technical problems that urgently need to be solved. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a radiation-resistant dipole magnet for particle accelerators. This magnet overcomes the shortcomings of existing technologies, improves the operational stability and service life of magnets in strong radiation environments, and has a simple and compact structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a radiation-resistant diode magnet for a particle accelerator, comprising: an iron core with an H-shaped structure; a coil disposed inside the iron core, wherein the coil is raised at both ends of the iron core to form a saddle-shaped structure; a radiation-resistant water pipe assembly disposed outside one end of the iron core, wherein the outlet end of the radiation-resistant water pipe assembly is connected to the outlet end of the coil to provide cooling water to the coil, and the inlet end of the radiation-resistant water pipe assembly is connected to an external cooling device.

[0007] Furthermore, the core is made of DT4 soft magnetic material.

[0008] Furthermore, the coil is made of TU1 copper wire with an outer square and an inner circle, and the end of the TU1 copper wire after being wound into a coil is used to connect the outlet of the radiation-resistant water pipe assembly.

[0009] Furthermore, during the winding process of TU1 copper wire, the insulation between coil turns is treated with polyimide and glass fiber cloth in a semi-overlapping manner, and is formed by vacuum epoxy casting.

[0010] Furthermore, the resin epoxy used for casting the coil is a radiation-resistant epoxy with added ceramic powder.

[0011] Furthermore, the radiation-resistant water pipe assembly includes multiple radiation-resistant water pipes arranged in parallel and a metal clamping plate; the metal clamping plate is fixedly installed on the outside of the iron core, and multiple through holes are provided on the metal clamping plate; the two ends of the multiple parallel radiation-resistant water pipes are respectively inserted through the through holes into a metal clamping plate.

[0012] Furthermore, each radiation-resistant water pipe includes a ceramic pipe, a copper pipe, and a metal compression fitting.

[0013] Each end of the ceramic tube is connected to a copper tube, and each copper tube has a metal compression fitting at its end.

[0014] Furthermore, the ceramic tube and the copper tube are connected by welding.

[0015] Furthermore, the ceramic tube, copper tube, and metal ferrule connector are all hollow structures, and the outer diameter of the metal ferrule connector corresponds to the inner diameter of the copper wire of the coil. One of the metal ferrule connectors connects the coil's output end to the radiation-resistant water pipe assembly.

[0016] Furthermore, a manifold is provided on one side of the inlet end of the radiation-resistant water pipe assembly, and the ends of multiple parallel radiation-resistant water pipes are connected to the manifold through another metal compression fitting.

[0017] The present invention has the following advantages due to the adoption of the above technical solutions:

[0018] This invention relates to a radiation-resistant dipole magnet used in particle accelerators. The radiation-resistant dipole magnet comprises an iron core, a saddle-shaped radiation-resistant coil, and a radiation-resistant water pipe assembly for coil water cooling. This magnet overcomes the shortcomings of traditional dipole magnets that fail in strong radiation environments and the deficiencies of existing magnet radiation-resistant technologies. It significantly improves the operational stability and service life of dipole magnets in strong radiation environments, and features a simple, compact structure that is less prone to failure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the radiation-resistant diode magnet used in the particle accelerator in this embodiment of the invention.

[0020] Figure 2 This is a schematic diagram of a saddle-shaped radiation-resistant coil in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the radiation-resistant water pipe assembly in an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] This invention provides a radiation-resistant dipole magnet for use in particle accelerators. In the high-radiation environment caused by particle beams, this radiation-resistant dipole magnet effectively improves its service life and operational stability, while also being compact and space-saving. The radiation-resistant dipole magnet of this invention mainly consists of an H-shaped magnet core, a saddle-shaped coil cast with radiation-resistant epoxy, and a radiation-resistant water pipe assembly. The saddle-shaped coil structure effectively avoids the strongest radiation area, the radiation-resistant epoxy increases the coil's radiation tolerance and extends its service life, and the radiation-resistant water pipe assembly overcomes the problem of short lifespan of traditional water-cooled magnet water pipe assemblies in high-radiation environments.

[0025] In one embodiment of the present invention, a radiation-resistant dipole magnet for a particle accelerator is provided. In this embodiment, the radiation-resistant dipole magnet effectively improves the magnet's radiation resistance and operational stability, and extends its service life, while providing a high-quality dipole magnetic field. Figure 1 As shown, the radiation-resistant diode magnet includes:

[0026] Iron core 1 adopts an H-shaped structure;

[0027] Coil 2 is disposed inside iron core 1, and coil 2 is raised at both ends of iron core 1 to form a saddle-shaped structure, such as... Figure 2 As shown;

[0028] The anti-radiation water pipe assembly 3 is located outside one end of the iron core 1, and the outlet end of the anti-radiation water pipe assembly 3 is connected to the outlet end of the coil 2 to provide cooling water to the coil 2. The inlet end of the anti-radiation water pipe assembly 3 is connected to an external cooling device.

[0029] In use, by adopting an H-shaped iron core 1 and a saddle-shaped coil 2, the strongest radiation area caused by the particle beam is effectively avoided while ensuring the quality of the magnetic field, thus minimizing the radiation dose received by the coil.

[0030] In the above embodiments, optionally, the iron core 1 is made of DT4 soft magnetic material.

[0031] In the above embodiments, when the magnet is running online, the charged particle beam will pass through the air gap in the middle of the magnet pole head. Affected by the particle beam, the magnet will be subjected to extremely strong radiation at both ends. Based on the radiation dose and distribution calculation, in this embodiment, the coil 2 is raised to a predetermined height at the pole head end, i.e., a saddle-shaped structure, to avoid the extremely strong radiation area.

[0032] Optionally, coil 2 is made of TU1 copper wire with a square outer shape and a round inner shape, and the end of the TU1 copper wire after winding forms the outlet of coil 2 for connecting to the radiation-resistant water pipe assembly 3. The TU1 copper wire has a round hole inside for passing water to cool the heat generated by the coil when it is energized.

[0033] Optionally, during the winding process of TU1 copper wire, the inter-turn insulation of the coil is partially wrapped with polyimide and glass fiber cloth, and then cast using vacuum epoxy. The epoxy resin used for casting the coil is a radiation-resistant epoxy with added ceramic powder to improve the coil's radiation resistance and prevent damage to the inter-turn insulation caused by strong radiation.

[0034] In the above embodiments, such as Figure 3As shown, the radiation-resistant water pipe assembly 3 includes multiple radiation-resistant water pipes 4 arranged in parallel and a metal clamping plate 5. The metal clamping plate 5 is fixedly installed on the outside of the iron core 1, and the metal clamping plate 5 is provided with multiple through holes; the two ends of the multiple parallel radiation-resistant water pipes 4 are respectively inserted through the through holes into a metal clamping plate 5 to fix the radiation-resistant water pipes 4 to the outside of the iron core 1.

[0035] Optionally, the radiation-resistant water pipe assembly 3 does not use any organic materials; all materials used are those with high radiation resistance. Each radiation-resistant water pipe 4 includes a ceramic pipe 6, a copper pipe 7, and a metal compression fitting 8. A copper pipe 7 is connected to each end of the ceramic pipe 6, and a metal compression fitting 8 is connected to the end of each copper pipe 7. In this embodiment, the ceramic pipe 6 and the copper pipe 7 are connected by welding.

[0036] The ceramic tube 6, copper tube 7, and metal ferrule connector 8 are all hollow structures. The outer diameter of the metal ferrule connector 8 corresponds to the inner diameter of the copper wire in the coil 2. The lead wire of the coil 2 is connected to the radiation-resistant water pipe assembly 3 through one of the metal ferrule connectors 8, and cooling water is introduced through it. In this embodiment, the radiation-resistant water pipe 4 serves as both a water supply and electrical insulation function.

[0037] Optionally, a manifold 9 is provided on one side of the inlet end of the radiation-resistant water pipe assembly 3, and the ends of multiple parallel radiation-resistant water pipes 4 are connected to the manifold through another metal compression fitting 8, and are connected to an external cooling device through the manifold.

[0038] In use, this invention replaces traditional water pipe assemblies made of organic materials such as rubber with copper pipes 7 and ceramic pipes 6 in the magnetic water cooling pipe assembly. The ceramic pipe 6 is used for electrical insulation between the two copper pipes 7, which significantly improves the service life and stability of the water pipe in a strong radiation environment.

[0039] In the above embodiments, organic materials are avoided in the other accessories and components of the magnet in order to improve the overall radiation resistance of the magnet.

[0040] 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 radiation-resistant diode magnet for a particle accelerator, characterized in that, include: The iron core adopts an H-shaped structure; The coil is placed inside the iron core, and the coil is raised at both ends of the iron core to form a saddle-shaped structure; The radiation-resistant water pipe assembly is located outside one end of the iron core, and the outlet end of the radiation-resistant water pipe assembly is connected to the coil outlet to provide cooling water to the coil. The inlet end of the radiation-resistant water pipe assembly is connected to an external cooling device. The radiation-resistant water pipe assembly includes multiple radiation-resistant water pipes arranged in parallel and a metal clamping plate; the metal clamping plate is fixedly installed on the outside of the iron core and has multiple through holes; the two ends of the multiple parallel radiation-resistant water pipes are respectively inserted through the through holes into a metal clamping plate. Each radiation-resistant water pipe includes a ceramic pipe, a copper pipe, and a metal compression fitting. Each end of the ceramic tube is connected to a copper tube, and each copper tube has a metal compression fitting at its end.

2. The radiation-resistant diode magnet for a particle accelerator as described in claim 1, characterized in that, The iron core is made of DT4 soft magnetic material.

3. The radiation-resistant diode magnet for a particle accelerator as described in claim 1, characterized in that, The coil is made of TU1 copper wire with a square outer shape and a round inner shape. After being wound into a coil, the end of the TU1 copper wire forms a coil for connecting the outlet of the radiation-resistant water pipe assembly.

4. The radiation-resistant diode magnet for a particle accelerator as described in claim 3, characterized in that, During the winding process of TU1 copper wire, the insulation between coil turns is treated with polyimide and glass fiber cloth in a semi-overlapping manner, and then cast with vacuum epoxy.

5. The radiation-resistant diode magnet for a particle accelerator as described in claim 4, characterized in that, The resin epoxy used for casting the coil is radiation-resistant epoxy with added ceramic powder.

6. The radiation-resistant diode magnet for a particle accelerator as described in claim 1, characterized in that, The ceramic tube and the copper tube are connected by welding.

7. The radiation-resistant diode magnet for a particle accelerator as described in claim 1, characterized in that, The ceramic tube, copper tube, and metal ferrule connector are all hollow structures, and the outer diameter of the metal ferrule connector corresponds to the inner diameter of the copper wire of the coil. One of the metal ferrule connectors connects the coil's lead wire to the radiation-resistant water pipe assembly.

8. The radiation-resistant diode magnet for a particle accelerator as described in claim 1, characterized in that, A manifold is installed on one side of the inlet end of the radiation-resistant water pipe assembly, and the ends of multiple parallel radiation-resistant water pipes are connected to the manifold through another metal compression fitting.

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