Permanent magnet-based environmentally friendly electron accelerator, and acceleration tube device

Abstract

Disclosed in the present invention are a permanent magnet-based environmentally friendly electron accelerator, and an acceleration tube device. The electron accelerator comprises a housing cylinder and a base; an acceleration tube device is disposed in the housing cylinder; the acceleration tube device comprises electrode sheets and permanent magnet devices; a permanent magnet device is provided between two adjacent electrode sheets; each permanent magnet device comprises an annular permanent magnet and an insulating member; the insulating member is disposed between two adjacent electrode sheets; and the permanent magnet devices and the electrode sheets are coaxially fixed on the base. In the present invention, a solid-state insulation structure is used to overcome the pollution problem caused by the use of gas insulation, the design of permanent magnet-based focusing enables electron beams to be effectively focused and constrained during transmission, thereby improving the stability and concentration of electron beam current, at the same time, the present invention has good insulation performance and high temperature resistance, thereby ensuring the stability and safety of the electron beam current inside an acceleration tube, and an electron beam focusing function is added without occupying additional space, thereby making the internal structure of the accelerator more rational.

Description

Environment-friendly electron accelerator based on permanent magnet and accelerating tube device TECHNICAL FIELD

[0001] The present application relates to an environment-friendly electron accelerator based on permanent magnet and accelerating tube device. BACKGROUND

[0002] An electron accelerator is a device for accelerating charged particles, in which a high-frequency high-voltage accelerator accelerates charged particles to high energy through the action of high-frequency electric field and high-voltage electric field. They are widely used in research fields, including particle physics, nuclear physics and materials science, etc. Known high-frequency high-voltage accelerators include a sealed shell filled with high-voltage insulating gas such as sulfur hexafluoride (SF6) for insulation and heat dissipation.

[0003] However, the insulation performance of high-voltage insulating gas is limited, and often leads to a large device volume. At the same time, among non-carbon dioxide greenhouse gases, sulfur hexafluoride (SF6) has the strongest greenhouse effect and is listed as one of the six restricted greenhouse gases.

[0004] The greenhouse effect potential of SF6 is 23500 times that of CO2, and its lifetime in the atmosphere is about 3200 years. This means that 1 kg of SF6 leaked into the atmosphere has the same impact on global warming as about 23.5 tons of carbon dioxide, and it can be considered to be permanently retained in the atmosphere and cannot be degraded, posing a huge threat to the environment.

[0005] The electron accelerator based on high-voltage insulating gas has the defects of large volume, complex structure, harm to the atmospheric environment, and difficult maintenance.

[0006] In addition, in the electron accelerator, the focusing and confinement of the electron beam are crucial to ensure the stability and concentration of the electron beam. The traditional scheme uses the voltage difference between the electrode pieces to form acceleration and electric field focusing, although it can achieve focusing effect, but the focusing performance is not ideal, and the focusing effect is not good, etc. Therefore, the development of a new type of focusing coil accelerating tube has become a hot spot of current research. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the defects of the prior art that the accelerator uses gas insulation, has a large volume, a complex structure, harms the atmospheric environment, and is difficult to maintain, and the focusing performance is not ideal and the focusing effect is not good, and to provide an environment-friendly electron accelerator based on permanent magnet and accelerating tube device that overcomes the pollution problem caused by gas insulation and provides a focusing coil design and a more reasonable structure to reduce the volume of the electron accelerator.

[0008] The present application solves the above technical problems by the following technical solutions:

[0009] The utility model provides an environment-friendly electronic accelerator based on permanent magnet, its characterized in be that the electronic accelerator includes a shell cylinder, an accelerating tube device and a base, the accelerating tube device is located in shell cylinder, the accelerating tube device includes a plurality of electrode pieces and a plurality of permanent magnet device, and the permanent magnet device is equipped between two adjacent electrode pieces, and the permanent magnet device includes annular permanent magnet and insulating piece, and the insulating piece is equipped between two adjacent electrode pieces, and the permanent magnet device is coaxially fixed on the top of base.

[0010] Preferably, the electronic accelerator includes a shell cylinder, an accelerating tube device, an insulation device, a high-voltage support and a base, the accelerating tube device is located in the shell cylinder,

[0011] The shell cylinder, the accelerating tube device and the high-voltage support are all arranged on the base, the high-voltage support is arranged outside the accelerating tube device, the shell cylinder is arranged outside the high-voltage support, the insulation device includes a solid insulation cylinder and an insulation top cover,

[0012] The solid insulation cylinder is arranged between the shell cylinder and the high-voltage support, the top of the solid insulation cylinder is fixed with the insulation top cover, the bottom of the solid insulation cylinder is arranged on the base, the solid insulation cylinder includes a plurality of layers of insulation film, and the insulation top cover is arranged above the high-voltage support.

[0013] The accelerating tube device includes a plurality of electrode pieces and a plurality of permanent magnet devices, the permanent magnet device is arranged between two adjacent electrode pieces, the permanent magnet device includes annular permanent magnet and insulating piece, the insulating piece is arranged between two adjacent electrode pieces, and the permanent magnet device is coaxially fixed on the top of base.

[0014] Preferably, the insulation top cover includes an insulation cylinder mounting groove, and the solid insulation cylinder is mounted in the insulation cylinder mounting groove.

[0015] The electronic accelerator includes a high-voltage cap arranged above the high-voltage support.

[0016] The solid insulation cylinder is higher than the high-voltage cap, an installation protrusion is arranged below the insulation top cover, the lower surface of the installation protrusion is matched with the upper surface of the high-voltage cap in shape, and the insulation top cover is fixed with the high-voltage cap by using insulation sealant.

[0017] Preferably, the electronic accelerator includes a liquid cooling heat dissipation device, the liquid cooling heat dissipation device includes an inlet, an outlet and insulation liquid, the insulation liquid flows through the outside of the solid insulation cylinder, the high-voltage support and the accelerating tube, the inlet is divided into a first pipeline and a second pipeline in the shell cylinder, the first pipeline is connected to the top of the shell cylinder, and the second pipeline is connected to the high-voltage cap in the top of the high-voltage support.

[0018] Preferably, the accelerating tube device further comprises a plurality of insulating rings, which are arranged between two adjacent electrode pieces.

[0019] Preferably, the insulating rings and the electrode pieces are alternately and tightly fixed on the base, and the annular permanent magnet is arranged on the inner side of the insulating rings.

[0020] Preferably, the electrode piece is provided with an annular groove, the annular permanent magnet is arranged in the annular groove, and the insulating member is fixed on the upper surface of the annular permanent magnet.

[0021] Preferably, the inner diameter of the annular insulating member is smaller than the inner diameter of the electrode piece, and the outer diameter of the annular insulating member is larger than the outer diameter of the annular permanent magnet.

[0022] Preferably, the electrode piece comprises an integral outer ring part and an inner ring part, the inner ring part is provided with an annular groove, the outer ring part is an annular piece and is connected with the top of the outer wall of the annular groove, and the insulating ring is fixed between the outer ring parts of two adjacent electrode pieces.

[0023] Preferably, the insulating member is an insulating shell, the annular permanent magnet is arranged in the insulating shell, the electrode pieces and the permanent magnet device are alternately and tightly arranged on the base, the electrode pieces are fixed with the permanent magnet device by inorganic structural glue, the top electrode piece of the accelerating tube device is fixed with the upper flange, the bottom electrode piece of the accelerating tube device is fixed with the lower flange, and the lower flange is fixed above the base.

[0024] The bottom of the insulating shell is provided with an annular opening, and the bottom surface of the annular permanent magnet is connected with the electrode piece below the annular permanent magnet; or

[0025] The top of the insulating shell is provided with an annular opening, and the top surface of the annular permanent magnet is connected with the electrode piece above the annular permanent magnet.

[0026] The application further provides an accelerating tube device, which is used in the environment-friendly electronic accelerator based on the permanent magnet.

[0027] On the basis of common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, thereby obtaining each preferred example of the application.

[0028] The positive progress effect of the application is that:

[0029] The application adopts solid insulation structure, overcomes pollution problem caused by gas insulation, and the permanent magnet focusing design enables the electron beam to be effectively focused and constrained during transmission, improves the stability and concentration of the electron beam, and has good insulation performance and high temperature resistance, thereby ensuring the stability and safety of the electron beam inside the accelerating tube, increasing the electron beam focusing function without occupying extra space, and making the internal structure of the accelerator more reasonable. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 is a structural schematic diagram of the accelerating tube device of the embodiment 1 of the application.

[0031] Fig. 2 is another structural schematic diagram of the accelerating tube device of the embodiment 1 of the application.

[0032] Fig. 3 is a structural schematic diagram of the electrode sheet of the embodiment 1 of the application.

[0033] Fig. 4 is a top view structural schematic diagram of the electrode sheet of the embodiment 1 of the application.

[0034] Fig. 5 is a structural schematic diagram of the electron accelerator of the embodiment 1 and the embodiment 2 of the application.

[0035] Fig. 6 is a structural schematic diagram of the insulation top cover of the embodiment 1 of the application.

[0036] Fig. 7 is a structural schematic diagram of the accelerating tube device of the embodiment 1 of the application.

[0037] Fig. 8 is a structural schematic diagram of the accelerating tube device of the embodiment 1 of the application.

[0038] Fig. 9 is a structural schematic diagram of the accelerating tube device of the embodiment 2 of the application.

[0039] Fig. 10 is another structural schematic diagram of the accelerating tube device of the embodiment 2 of the application.

[0040] Fig. 11 is another structural schematic diagram of the accelerating tube device of the embodiment 2 of the application.

[0041] Fig. 12 is a sectional structural schematic diagram of the permanent magnet device of the embodiment 2 of the application.

[0042] Fig. 13 is a structural schematic diagram of the permanent magnet device of the embodiment 2 of the application. DETAILED DESCRIPTION

[0043] The application will be further described below by way of examples, but the application is not limited in the scope of the examples.

[0044] Embodiment 1

[0045] In the embodiments, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for description purposes and cannot be understood as indicating or implying relative importance.

[0046] Referring to FIGS. 1-8, the present embodiments provide an environment-friendly electronic accelerator based on permanent magnet, which comprises an accelerating tube device 100, a shell cylinder 101, an insulation device 104, a base 102 and a high-voltage support 103.

[0047] The accelerating tube device is arranged in the shell cylinder.

[0048] The shell cylinder, the accelerating tube device and the high-voltage support are all arranged on the base, the high-voltage support is arranged outside the accelerating tube device, the shell cylinder is arranged outside the high-voltage support, the insulation device comprises a solid insulation cylinder 1041 and an insulation top cover 1042,

[0049] The solid insulation cylinder is arranged between the shell cylinder and the high-voltage support, the top of the solid insulation cylinder is fixed with the insulation top cover, the bottom of the solid insulation cylinder is arranged on the base, the solid insulation cylinder comprises a plurality of layers of insulation film, and the insulation top cover is arranged above the high-voltage support;

[0050] The solid insulation cylinder comprises a fixed cylinder for supporting, which can be diamond, quartz, injection molding or ceramic. The insulation film is wound on the fixed cylinder to form the solid insulation cylinder.

[0051] The insulation film is a polyimide film, the thickness of a single layer of insulation film is 0.01mm to 10mm, and the total number of layers of the insulation film is 600 to 2200. In the embodiments, the total number of layers of the insulation film is preferably 1800.

[0052] The insulation top cover comprises an insulation cylinder mounting groove 1044, and the solid insulation cylinder is mounted in the insulation cylinder mounting groove 1044;

[0053] The electronic accelerator comprises a high-voltage cap 1032 arranged above the high-voltage support 103;

[0054] The solid insulation cylinder 1041 is higher than the high-voltage cap, and the insulation cover 1042 is provided with a mounting protrusion 1043 below, the lower surface of the mounting protrusion matches the shape of the upper surface of the high-voltage cap, and the insulation cover is fixed with the high-voltage cap by using insulation sealant.

[0055] The electron accelerator comprises a liquid cooling device 107, and the liquid cooling device comprises a liquid inlet and a liquid outlet.

[0056] The insulation liquid flows through the outside of the solid insulation cylinder, the high-voltage support and the acceleration tube device.

[0057] The liquid inlet is divided into a first pipeline 1071 and a second pipeline 1072 in the shell cylinder, the first pipeline is connected to the top of the shell cylinder, and the second pipeline is connected to the high-voltage cap at the top of the high-voltage support.

[0058] The liquid inlet and the liquid outlet are both arranged on the base, the first pipeline is connected to the top of the shell cylinder from the base along the gap between the solid insulation cylinder and the shell cylinder.

[0059] The second pipeline is connected to the bottom of the first pipeline and is connected to the high-voltage cap along the gap between the high-voltage support and the acceleration tube device.

[0060] The liquid cooling device further comprises an internal liquid inlet cover 1073 and an external liquid inlet cover 1074, the internal liquid inlet cover 1073 is arranged at the top of the high-voltage cap, and the external liquid inlet cover is arranged at the top of the shell cylinder.

[0061] The internal liquid inlet cover and the external liquid inlet cover are both provided with a liquid inlet and a plurality of liquid outlets, the first pipeline is connected to the liquid inlet of the external liquid inlet cover from below, and the second pipeline is connected to the liquid inlet of the internal liquid inlet cover from below.

[0062] The insulation liquid flows through the gap between the high-voltage support and the acceleration tube device from the internal liquid inlet cover, and the insulation liquid flows through the gap between the solid insulation cylinder and the shell cylinder from the external liquid inlet cover.

[0063] The acceleration tube device 100 is arranged in the shell cylinder 101, and the acceleration tube device 100 comprises a plurality of electrode sheets 1001 and a plurality of permanent magnet devices.

[0064] The permanent magnet device is arranged between two adjacent electrode sheets 1001, and the permanent magnet device comprises a ring-shaped permanent magnet 200 and an insulation piece 201.

[0065] The insulation piece 201 is arranged between two adjacent electrode sheets 1001, and the permanent magnet device is coaxially fixed above the base with the electrode sheet 1001.

[0066] The accelerating tube device further comprises a plurality of insulating rings 203, and the insulating rings 203 are arranged between adjacent two electrode sheets.

[0067] The insulating rings are made of glass or ceramic, and are fixed by structural glue.

[0068] The insulating rings 203 and the electrode sheets 1001 are alternately stacked and fixed on the base, and the annular permanent magnet is arranged on the inner side of the insulating ring 203.

[0069] The electrode sheet 1001 is provided with an annular groove 204, the annular permanent magnet is arranged in the annular groove, and the insulating part is fixed on the upper surface of the annular permanent magnet.

[0070] The inner diameter of the annular insulating part is smaller than the inner diameter of the electrode sheet, and the outer diameter of the annular insulating part is larger than the outer diameter of the annular permanent magnet.

[0071] The electrode sheet comprises an outer ring part 205 and an inner ring part 206 which are integrally formed, the inner ring part is provided with an annular groove, the outer ring part is an annular sheet and is connected with the outer wall top of the annular groove, and the insulating ring is fixed between the outer ring parts of adjacent electrode sheets.

[0072] The permanent magnet device is provided with a beam hole 207 in the middle of the electrode sheet.

[0073] Embodiment 2

[0074] Referring to FIGS. 5, 9-13, the embodiment is basically the same as embodiment 1, and the difference is only that:

[0075] The accelerating tube device 100 is arranged in the shell cylinder 101.

[0076] The accelerating tube device 100 comprises a plurality of electrode sheets 1001 and a plurality of permanent magnet devices 1002.

[0077] The permanent magnet device 1002 is arranged between adjacent two electrode sheets 1001.

[0078] The permanent magnet device 1002 comprises an annular permanent magnet 10021 and an insulating part 10022.

[0079] The insulating part is an insulating shell, and the annular permanent magnet is arranged in the insulating shell.

[0080] Adjacent two electrode sheets 1001 are insulated by the insulating shell 10022.

[0081] The permanent magnet device 1002 and the electrode sheet 1001 are coaxially fixed above the base 102.

[0082] The permanent magnet device is provided with a beam hole in the middle of the electrode sheet.

[0083] The annular permanent magnet is arranged in the insulating shell.

[0084] The bottom of the insulating shell is provided with an annular opening, and the bottom surface of the annular permanent magnet is connected with the electrode sheet below the annular permanent magnet.

[0085] In other embodiments, the top of the insulating shell is provided with an annular opening, and the top surface of the annular permanent magnet is connected with the electrode sheet above the annular permanent magnet.

[0086] The electrode sheet and the permanent magnet device are alternately stacked on the base, and the electrode sheet is fixed with the permanent magnet device by inorganic structural glue.

[0087] The inorganic structural glue is insulating glue.

[0088] The top electrode sheet of the accelerating tube device 100 is fixed with the upper flange 1003, the bottom electrode sheet of the accelerating tube device is fixed with the lower flange 1004, and the lower flange 1004 is fixed above the base 102.

[0089] The outer diameter of the permanent magnet device is smaller than the outer diameter of the electrode sheet, and the inner diameter of the permanent magnet device is larger than the inner diameter of the electrode sheet.

[0090] The material of the insulating part is polyimide, and the material of the insulating shell can also be other high-performance insulating materials.

[0091] A voltage dividing resistor is arranged between two adjacent electrode sheets.

[0092] Further, the electron accelerator comprises a high-voltage support 103 and an insulating device 104, the high-voltage support 103 is arranged outside the accelerating tube device 100, the insulating device 104 is arranged outside the high-voltage support 103, and an electrode 105 is arranged between the insulating device and the shell cylinder.

[0093] The shell cylinder is arranged outside the insulating device.

[0094] The solid-state insulating structure is adopted, the pollution problem caused by gas insulation is overcome, the design of permanent magnet focusing enables the electron beam to be effectively focused and constrained during transmission, improves the stability and concentration of the electron beam, has good insulation performance and high temperature resistance, ensures the stability and safety of the electron beam in the accelerating tube, increases the electron beam focusing function without occupying additional space, and makes the internal structure of the accelerator more reasonable.

[0095] Although the specific embodiments of the present application have been described above, it is understood by those skilled in the art that these are merely illustrative, and the scope of protection of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and the essence of the present application, and such changes and modifications fall within the scope of protection of the present application.

Claims

1. An environmentally friendly permanent magnet based electron accelerator, characterized in that, The electronic accelerator comprises a shell cylinder, an accelerating tube device and a base, the accelerating tube device is arranged in the shell cylinder, the accelerating tube device comprises electrode pieces and permanent magnet devices, the permanent magnet devices are arranged between adjacent electrode pieces, the permanent magnet device comprises a ring-shaped permanent magnet and an insulating piece, the insulating piece is arranged between adjacent electrode pieces, and the permanent magnet device is coaxially fixed to the top of the base.

2. The environment-friendly permanent magnet-based electron accelerator according to claim 1, wherein The electronic accelerator comprises an insulating device and a high-voltage support, The shell cylinder, the accelerating tube device and the high-voltage support are arranged on the base, the high-voltage support is arranged outside the accelerating tube device, the shell cylinder is arranged outside the high-voltage support, the insulating device comprises a solid insulating cylinder and an insulating top cover, The solid insulating cylinder is arranged between the shell cylinder and the high-voltage support, the top of the solid insulating cylinder is fixed to the insulating top cover, the bottom of the solid insulating cylinder is arranged on the base, the solid insulating cylinder comprises a plurality of layers of insulating films, and the insulating top cover is arranged above the high-voltage support; The insulating top cover comprises an insulating cylinder mounting groove, and the solid insulating cylinder is mounted in the insulating cylinder mounting groove; The electronic accelerator comprises a high-voltage cap arranged above the high-voltage support; The solid insulating cylinder is higher than the high-voltage cap, an installation protrusion is arranged below the insulating top cover, the lower surface of the installation protrusion is matched with the upper surface of the high-voltage cap in shape, and the insulating top cover is fixed to the high-voltage cap by means of insulating sealant.

3. The environment-friendly permanent magnet-based electron accelerator according to claim 2, wherein The electronic accelerator comprises a liquid cooling heat dissipation device, the liquid cooling heat dissipation device comprises an inlet and an outlet, and an insulating liquid flows outside the solid insulating cylinder, the high-voltage support and the accelerating tube, the inlet is divided into a first pipeline and a second pipeline in the shell cylinder, the first pipeline is connected to the top of the shell cylinder, and the second pipeline is connected to the high-voltage cap at the top of the high-voltage support.

4. The environment-friendly permanent magnet-based electron accelerator according to claim 1, wherein The accelerating tube device further comprises a plurality of insulating rings, and the insulating rings are arranged between adjacent electrode pieces.

5. The environment-friendly permanent magnet-based electron accelerator according to claim 4, wherein The insulating rings and the electrode pieces are alternately and sealingly fixed on the base, and the ring-shaped permanent magnets are arranged inside the insulating rings.

6. The environment-friendly permanent magnet-based electron accelerator according to claim 5, wherein An annular groove is arranged on the electrode piece, the ring-shaped permanent magnet is arranged in the annular groove, and the insulating piece is fixed to the upper surface of the ring-shaped permanent magnet.

7. The environment-friendly permanent magnet-based electron accelerator according to claim 4, wherein the permanent magnet is a rare earth magnet. The inner diameter of the annular insulating piece is smaller than the inner diameter of the electrode piece, and the outer diameter of the insulating piece is greater than the outer diameter of the ring-shaped permanent magnet.

8. The environment-friendly permanent magnet-based electron accelerator according to claim 4, wherein The electrode piece comprises an integrally formed outer ring portion and an inner ring portion, the inner ring portion is provided with the annular groove, the outer ring portion is an annular piece and is connected to the outer wall top of the annular groove, and the insulating rings are fixed between the outer ring portions of adjacent electrode pieces.

9. The environment-friendly permanent magnet-based electron accelerator according to claim 1, wherein The insulating piece is an insulating shell, the ring-shaped permanent magnet is arranged in the insulating shell, the electrode pieces and the permanent magnet devices are alternately arranged on the base, the electrode pieces are fixed to the permanent magnet devices by means of inorganic structural adhesive, the top electrode piece of the accelerating tube device is fixed to an upper flange, the bottom electrode piece of the accelerating tube device is fixed to a lower flange, and the lower flange is fixed to the top of the base. The bottom of the insulating shell is provided with an annular opening, and the bottom surface of the annular permanent magnet is connected with the electrode sheet below the annular permanent magnet. The top of the insulating shell is provided with an annular opening, and the top surface of the annular permanent magnet is connected with the electrode sheet above the annular permanent magnet.

10. An accelerator tube apparatus, characterized by comprising: The accelerating tube device is used in the environment-friendly electronic accelerator based on the permanent magnet as claimed in any one of claims 1 to 9.

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