Accelerating tube device based on permanent magnet, permanent magnet device and electron accelerator

Abstract

The utility model discloses an accelerating tube device based on a permanent magnet, a permanent magnet device and an electron accelerator, the electron accelerator comprises a shell cylinder and a base, the accelerating tube device is arranged in the shell cylinder, the accelerating tube device comprises electrode plates and the permanent magnet device, the permanent magnet device is arranged between two adjacent electrode plates, and the electrode plates are arranged on the base. The permanent magnet device comprises an annular permanent magnet and an insulating part, the insulating part is arranged between two adjacent electrode plates, and the permanent magnet device and the electrode plates are coaxially fixed above the base. According to the utility model, the design of permanent magnet focusing is provided, so that electron beams can be effectively focused and constrained in the transmission process, the stability and the centrality of electron beams are improved, meanwhile, good insulation performance and high temperature resistance are achieved, the stability and the safety of the electron beams in the accelerating tube are ensured, and further, the service life of the accelerating tube is prolonged. On the basis of not occupying extra space, an electron beam focusing function is added, and the internal structure of the accelerator is more reasonable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of accelerating tube device based on permanent magnet, permanent magnet device and electron accelerator. BACKGROUND

[0002] Electron accelerator is a kind of device for accelerating charged particles, wherein, high-frequency high-voltage accelerator is accelerated to high energy by 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. Electron accelerator can work in different ways, including linear accelerator and ring accelerator, etc. By continuously accelerating particles, electron accelerator can produce high-energy particle beams for studying high-energy physical phenomena or conducting medical radiotherapy.

[0003] In electron accelerator, the focusing and confinement of electron beam are crucial to ensure the stability and concentration of electron beam. Although the voltage difference between the electrode sheets can form acceleration and electric field focusing, the traditional scheme gradually shows the shortcomings of unsatisfactory focusing performance and poor focusing effect. Therefore, developing a new type of focusing coil accelerating tube has become a hot spot of current research. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the defects of unsatisfactory focusing performance, poor focusing effect and large space occupied by focusing device in the prior art, provide an accelerating tube device based on permanent magnet, permanent magnet device and electron accelerator, which can effectively focus and confine electron beam during transmission, improve the stability and concentration of electron beam, and has stable and reliable focusing effect, reasonable structure and small volume of electron accelerator.

[0005] The utility model solves the above technical problems by the following technical solutions:

[0006] An accelerating tube device based on permanent magnet is used in electron accelerator, and the electron accelerator includes a shell cylinder and a base. The accelerating tube device is arranged in the shell cylinder. The accelerating tube device includes a plurality of electrode sheets and a plurality of permanent magnet devices. The permanent magnet device is arranged between adjacent electrode sheets. The permanent magnet device includes a ring-shaped permanent magnet and an insulating piece. The insulating piece is arranged between adjacent electrode sheets. The permanent magnet device and the electrode sheet are coaxially fixed above the base.

[0007] Preferably, the accelerating tube device further includes a plurality of insulating rings, and the insulating ring is arranged between adjacent electrode sheets.

[0008] Preferably, the insulating ring and the electrode sheet are alternately and sealingly fixed on the base, and the ring-shaped permanent magnet is arranged on the inner side of the insulating ring.

[0009] Preferably, the electrode sheet is provided with a ring-shaped recess, the ring-shaped permanent magnet is arranged in the ring-shaped recess, and the insulating member is fixed to the upper surface of the ring-shaped permanent magnet.

[0010] Preferably, the inner diameter of the ring-shaped insulating member is smaller than the inner diameter of the electrode sheet, and the outer diameter of the insulating member is larger than the outer diameter of the ring-shaped permanent magnet.

[0011] Preferably, the electrode sheet comprises an integrally formed outer ring portion and an inner ring portion, the inner ring portion is provided with a ring-shaped recess, the outer ring portion is a ring-shaped sheet and is connected to the top of the outer wall of the ring-shaped recess, and the insulating ring is fixed between the outer ring portions of adjacent electrode sheets.

[0012] The insulating member is an insulating shell, and the ring-shaped permanent magnet is arranged in the insulating shell.

[0013] The bottom of the insulating shell is provided with a ring-shaped opening, and the bottom surface of the ring-shaped permanent magnet is connected to the electrode sheet below the ring-shaped permanent magnet; or

[0014] The top of the insulating shell is provided with a ring-shaped opening, and the top surface of the ring-shaped permanent magnet is connected to the electrode sheet above the ring-shaped permanent magnet.

[0015] Preferably, the electrode sheet and the permanent magnet device are alternately and superimposedly arranged on the base, and the electrode sheet is fixed to the permanent magnet device by inorganic structural glue.

[0016] Preferably, the top electrode sheet of the accelerating tube device is fixed to the upper flange, the bottom electrode sheet of the accelerating tube device is fixed to the lower flange, and the lower flange is fixed above the base.

[0017] Preferably, 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.

[0018] Preferably, the material of the insulating member is polyimide.

[0019] Preferably, a voltage dividing resistor is arranged between two adjacent electrode sheets.

[0020] Preferably, the electron accelerator comprises a high-voltage support and an insulating device, the high-voltage support is arranged outside the accelerating tube, the insulating device is arranged outside the high-voltage support, and the shell cylinder is arranged outside the insulating device.

[0021] The utility model also provides a permanent magnet device, its characterized in that, the permanent magnet device includes ring-shaped permanent magnet and an insulating member, the permanent magnet device is used in the accelerating tube device based on permanent magnet as mentioned above.

[0022] The utility model also provides an electron accelerator, its characterized in being, the electron accelerator includes the accelerating tube device based on permanent magnet as above.

[0023] On the basis of conforming to the common sense of the art, the above-mentioned preferred conditions can be combined arbitrarily, i.e. the preferred examples of the utility model.

[0024] The utility model has the positive progress effect in that:

[0025] The utility model provides permanent magnet focusing design, so that the electron beam can be effectively focused and constrained in the transmission process, improve the stability and concentration of electron beam, and have good insulation performance and high temperature resistance, ensure the stability and safety of the electric field inside the accelerating tube, further, the application increases the electron beam focusing function on the basis of not occupying extra space, and the internal structure of the accelerator is more rationalized. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structure schematic view of the accelerating tube device of the utility model embodiment 1.

[0027] Figure 2 It is another structure schematic view of the accelerating tube device of the utility model embodiment 1.

[0028] Figure 3 It is the structure schematic view of the electrode sheet of the utility model embodiment 1.

[0029] Figure 4 It is the overhead structure schematic view of the electrode sheet of the utility model embodiment 1.

[0030] Figure 5 It is the structure schematic view of the electron accelerator of the utility model embodiment 1 and embodiment 2.

[0031] Figure 6 It is the structure schematic view of the accelerating tube device of the utility model embodiment 2.

[0032] Figure 7 It is another structure schematic view of the accelerating tube device of the utility model embodiment 2.

[0033] Figure 8 It is another structure schematic view of the accelerating tube device of the utility model embodiment 2.

[0034] Figure 9 It is the cross section structure schematic view of the permanent magnet device of the utility model embodiment 2.

[0035] Figure 10 It is the structure schematic view of the permanent magnet device of the utility model embodiment 2. DETAILED DESCRIPTION

[0036] The utility model is further illustrated below by way of examples, but the utility model is not limited in the scope of the examples.

[0037] Embodiment 1

[0038] In this embodiment, 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 is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] Referring to Figures 1 to 5 , the present embodiment provides an electron accelerator, which comprises an accelerating tube device 100, a shell cylinder 101, a base 102 and a high-voltage support 103.

[0040] The accelerating tube device is arranged in the shell cylinder 101, and the accelerating tube device 100 comprises a plurality of electrode sheets 1001 and a plurality of permanent magnet devices.

[0041] The permanent magnet device is arranged between two adjacent electrode sheets 1001, and the permanent magnet device comprises an annular permanent magnet 200 and an insulating piece 201.

[0042] The insulating 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.

[0043] The accelerating tube device further comprises a plurality of insulating rings 203, and the insulating ring 203 is arranged between two adjacent electrode sheets.

[0044] The insulating ring is made of glass or ceramic material and serves as a support for insulation, and is fixed by using structural adhesive.

[0045] The insulating ring 203 and the electrode sheet 1001 are alternately stacked and sealed on the base, and the annular permanent magnet is arranged on the inner side of the insulating ring 203.

[0046] An annular groove 204 is arranged on the electrode sheet 1001, the annular permanent magnet is arranged in the annular groove, and the insulating piece is fixed to the upper surface of the annular permanent magnet.

[0047] The inner diameter of the annular insulating piece is smaller than the inner diameter of the electrode sheet, and the outer diameter of the insulating piece is larger than the outer diameter of the annular permanent magnet.

[0048] The electrode sheet comprises an integrally formed outer ring portion 205 and an inner ring portion 206 provided with an annular groove, the outer ring portion is an annular sheet and is connected to the top of the outer wall of the annular groove, and the insulating ring is fixed between the outer ring portions of adjacent electrode sheets.

[0049] The permanent magnet device is provided with a beam hole 207 in the middle of the electrode sheet.

[0050] Embodiment 2

[0051] Referring to Figures 5 to 10 , the embodiment is basically the same as embodiment 1, and the difference is only that:

[0052] The acceleration tube device 100 is arranged in the shell cylinder 101.

[0053] The acceleration tube device 100 comprises a plurality of electrode sheets 1001 and a plurality of permanent magnet devices 1002.

[0054] The permanent magnet device 1002 is arranged between the two adjacent electrode sheets 1001.

[0055] The permanent magnet device 1002 comprises an annular permanent magnet 10021 and an insulating member 10022.

[0056] The insulating member is an insulating shell, and the annular permanent magnet is arranged in the insulating shell.

[0057] The insulating member 10022 is used to insulate the two adjacent electrode sheets 1001.

[0058] The permanent magnet device 1002 is coaxially fixed above the base 102 with the electrode sheet 1001.

[0059] The permanent magnet device is provided with a beam hole in the middle of the electrode sheet.

[0060] The annular permanent magnet is arranged in the insulating shell.

[0061] 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.

[0062] 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.

[0063] The electrode sheet and the permanent magnet device are alternately arranged on the base, and the electrode sheet is fixed with the permanent magnet device by inorganic structural adhesive.

[0064] The inorganic structural adhesive is insulating adhesive.

[0065] 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.

[0066] 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.

[0067] The material of the insulating part is polyimide, and the material of the insulating shell can also be other high-performance insulating materials.

[0068] A voltage dividing resistor is arranged between two adjacent electrode sheets.

[0069] Further, the electron accelerator comprises a high-voltage support 103 arranged outside the accelerating tube 100 and an insulating device 104 arranged outside the high-voltage support 103, and an electrode 105 is arranged between the insulating device and the shell cylinder.

[0070] The shell cylinder is arranged outside the insulating device.

[0071] The embodiment provides a permanent magnet focusing design, so that the electron beam can be effectively focused and constrained during transmission, the stability and concentration of the electron beam are improved, the insulating performance and high-temperature resistance are good, the stability and safety of the electric field inside the accelerating tube are ensured, and further, the electron beam focusing function is added without occupying additional space, so that the internal structure of the accelerator is more rationalized.

[0072] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that these are only illustrative, the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, but these changes and modifications all fall within the protection scope of the utility model.

Claims

1. An accelerating tube device based on a permanent magnet, used in an electron accelerator, the electron accelerator comprising an outer shell and a base, the accelerating tube device being disposed within the outer shell, characterized in that: The accelerating tube device includes a plurality of electrode plates and a plurality of permanent magnet devices. The permanent magnet device is arranged between two adjacent electrode plates. The permanent magnet device includes an annular permanent magnet and an insulating member. The insulating member is arranged between two adjacent electrode plates. The permanent magnet device and the electrode plates are coaxially fixed above the base.

2. The permanent magnet-based accelerating tube device according to claim 1, wherein: The accelerating tube device further comprises a plurality of insulating rings, wherein the insulating rings are arranged between two adjacent electrode sheets.

3. The permanent magnet-based accelerating tube device according to claim 2, wherein: The insulating rings and the electrode sheets are alternately stacked and sealed on the base, and the annular permanent magnet is arranged on the inner side of the insulating ring.

4. The permanent magnet-based accelerating tube device according to claim 3, wherein: An annular groove is provided on the electrode sheet, the annular permanent magnet is provided in the annular groove, and the insulating member is fixed to the upper surface of the annular permanent magnet.

5. The accelerating tube device based on a permanent magnet according to claim 2, characterized in that: The inner diameter of the annular insulating member is smaller than the inner diameter of the electrode sheet, and the outer diameter of the insulating member is larger than the outer diameter of the annular permanent magnet.

6. The permanent magnet-based accelerating tube device according to claim 2, wherein: The electrode sheet includes an integrally formed outer ring portion and an inner ring portion, the inner ring portion is provided with an annular groove, the outer ring portion is an annular sheet and is connected to the top of the outer wall of the annular groove, and the insulating ring is fixed between the outer ring portions of adjacent electrode sheets.

7. The permanent magnet-based accelerating tube device according to claim 1, wherein: The insulating member is an insulating shell, the annular permanent magnet is arranged in the insulating shell, the electrode sheets and the permanent magnet device are alternately stacked on the base, the electrode sheets are fixed to the permanent magnet device by inorganic structural adhesive, the top electrode sheet of the accelerating tube device is fixed to the upper flange, the bottom electrode sheet of the accelerating tube device is fixed to the lower flange, and the lower flange is fixed above 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 to the electrode sheet below the annular permanent magnet; or, An annular opening is provided on the top of the insulating shell, and the top surface of the annular permanent magnet is connected to the electrode sheet above the annular permanent magnet.

8. The permanent magnet-based accelerating tube device according to claim 1, wherein: The electron accelerator includes a high-voltage bracket and an insulating device. The high-voltage bracket is arranged outside the accelerating tube, the insulating device is arranged outside the high-voltage bracket, and the outer shell is arranged outside the insulating device.

9. A permanent magnet device, characterized in that: The permanent magnet device includes an annular permanent magnet and an insulating member, and the permanent magnet device is used in the permanent magnet-based accelerating tube device according to any one of claims 1 to 8.

10. An electron accelerator, characterized in that: The electron accelerator comprises the permanent magnet-based accelerating tube device according to any one of claims 1 to 8.

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