Electron beam focusing device, focusing accelerating tube and electron accelerator

Abstract

The utility model discloses an electron beam focusing device, a focusing accelerating tube and an electron accelerator, the electron accelerator comprises a shell cylinder, an insulating device, a base and an accelerating tube, the insulating device is arranged on the outer side of the accelerating tube, the shell cylinder is arranged on the outer side of the insulating device, and the base is arranged on the outer side of the shell cylinder. The electron beam focusing device comprises an electromagnetic coil, the electromagnetic coil is fixed between the shell cylinder and the insulation device through a fixing piece, and the electromagnetic coil is electrically connected with the current adjusting circuit. The utility model provides the design of the focusing coil, so that electron beams can be effectively focused and constrained in the transmission process, the stability and the centrality of electron beams are improved, the stability and the reliability of the focusing effect are ensured by the tight fixed connection of the focusing coil and the shell, and the focusing coil has a good magnetic conductive function.

Description

Technical Field

[0001] The utility model relates to an electron beam focusing device, a focusing acceleration tube and an electron accelerator. Background Art

[0002] An electron accelerator is a device used to accelerate charged particles. Among them, a high-frequency high-voltage accelerator accelerates charged particles to high energy through the action of a high-frequency electric field and a high-voltage electric field. They are widely used in research fields, including particle physics, nuclear physics, materials science and other fields. Electron accelerators can work in different ways, including linear accelerators and circular accelerators. By continuously accelerating particles, electron accelerators can generate high-energy particle beams for studying high-energy physical phenomena or performing medical radiotherapy.

[0003] In an electron accelerator, the focusing and confinement of the electron beam are crucial for ensuring the stability and concentration of the electron beam current. The traditional scheme uses the voltage difference between electrode plates to form acceleration and electric field focusing. Although the focusing effect can be achieved, the disadvantages such as unsatisfactory focusing performance and poor focusing effect gradually appear. Therefore, the development of a new type of focusing coil acceleration tube has become a current research hotspot. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defects of unsatisfactory focusing performance and poor focusing effect in the prior art, and provide an electron beam focusing device, a focusing acceleration tube and an electron accelerator that can effectively focus and confine the electron beam during transmission, improve the stability and concentration of the electron beam current, and ensure the stability and reliability of the structure by tightly fixing the focusing coil to the outer shell, and has good magnetic conduction function.

[0005] The utility model solves the above technical problem through the following technical solutions:

[0006] An electron beam focusing device for an electron accelerator, characterized in that the electron accelerator includes an outer shell cylinder, an insulating device, a base and an acceleration tube, the insulating device is arranged outside the acceleration tube, and the outer shell cylinder is arranged outside the insulating device.

[0007] The electron beam focusing device includes an electromagnetic coil, the electromagnetic coil is fixed between the outer shell cylinder and the insulating device through a fixing member, and the electromagnetic coil is electrically connected to a current regulating circuit.

[0008] Preferably, the electron beam focusing device includes a coil outer shell, the electromagnetic coil is arranged inside the coil outer shell, and the coil outer shell is fixed between the outer shell cylinder and the insulating device through a fixing member.

[0009] Preferably, the fixing member is a clamping member, and the coil housing is fixed to the inner surface of the housing cylinder through the clamping member; or,

[0010] The fixing member is a bolt, and the coil housing is fixed to the inner surface of the housing cylinder through the bolt.

[0011] Preferably, the fixing member is insulating glue, and the coil housing is fixed to the inner surface of the housing cylinder through the insulating glue.

[0012] Preferably, the electromagnetic coil includes a plurality of sub-coils, each sub-coil is wound with a wire, and the sub-coils are stacked and fixed on the housing cylinder.

[0013] Preferably, the coil housing is fixed above the base through the fixing member.

[0014] Preferably, the base is provided with a wire through hole for passing the wire, and the electromagnetic coil is electrically connected to the current adjustment circuit through the wire.

[0015] Preferably, the access pin and the output pin of the electromagnetic coil are both arranged at the bottom of the electromagnetic coil, and the access pin and the output pin are electrically connected to the current adjustment circuit through the wire.

[0016] Preferably, the acceleration tube is arranged on the base, a high-voltage support is arranged outside the acceleration tube, the insulating device includes an insulating cylinder and an insulating cover, the insulating cylinder is arranged outside the high-voltage support, the insulating cover is arranged at the top of the insulating cylinder and the high-voltage support and is fixed to the insulating cylinder, and a high-voltage electrode is arranged outside the insulating cylinder, and the high-voltage electrode is arranged between the electromagnetic coil and the insulating cylinder.

[0017] The present invention also provides a focusing acceleration tube, which is characterized in that the focusing acceleration tube includes an acceleration tube and the electron beam focusing device as described above.

[0018] The present invention also provides an electron accelerator, which is characterized in that the electron accelerator includes the electron beam focusing device as described above.

[0019] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0020] The positive and progressive effects of the present invention are as follows:

[0021] The present invention provides a design of a focusing coil, so that the electron beam can be effectively focused and constrained during the transmission process, improving the stability and concentration of the electron beam current. The tight fixed connection between the focusing coil and the housing ensures the stability and reliability of the focusing effect and has a good magnetic conduction function. Description of the Drawings

[0022] Figure 1 The structural schematic diagram of the electron accelerator according to Embodiment 1 of the present utility model.

[0023] Figure 2 Another structural schematic diagram of the electron accelerator according to Embodiment 1 of the present utility model.

[0024] Figure 3 Another structural schematic diagram of the electron accelerator according to Embodiment 1 of the present utility model.

[0025] Figure 4 The structural schematic diagram of the electron accelerator according to Embodiment 4 of the present utility model. Detailed implementation manners

[0026] The present utility model will be further described below by way of embodiments, but the present utility model is not limited to the scope of the described embodiments.

[0027] Embodiment 1

[0028] In this embodiment, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] Refer to Figures 1 to 3 , this embodiment provides an electron accelerator, and the electron accelerator includes an electron beam focusing device 100, a housing cylinder 101, an insulating device 102, a base 103, and an accelerating tube 104.

[0030] The insulating device is arranged outside the accelerating tube, and the housing cylinder is arranged outside the insulating device.

[0031] The electron beam focusing device includes an electromagnetic coil and a coil housing.

[0032] The electromagnetic coil is fixed between the housing cylinder and the insulating device through a fixing member, and the electromagnetic coil is electrically connected to a current regulating circuit 105.

[0033] Specifically, the electromagnetic coil is arranged inside the coil housing, and the coil housing is fixed between the housing cylinder and the insulating device through a fixing member.

[0034] The main insulation layer of the insulation device is located inside the accelerator, used for insulation and also for isolating high voltage to prevent voltage breakdown.

[0035] The electron beam focusing device is closely attached to the inner wall of the outer shell and is composed of electromagnetic coils. By adjusting the magnitude of the current, the magnetic field intensity is controlled, thereby achieving the focusing and confinement of the electron beam.

[0036] The outer shell is of a steel cylinder structure and can be tightly and fixedly connected to the electron beam focusing device, playing a role in support, magnetic conduction, and protection.

[0037] The fixing member is a bolt, and the coil housing is fixed to the inner surface of the outer shell cylinder through the bolt.

[0038] The bolt holes opened on the coil housing not only reduce the weight of the electron beam focusing device but also improve the convenience and stability of installation.

[0039] In other embodiments, the fixing member is a clamping member, and the coil housing is fixed to the inner surface of the outer shell cylinder through the clamping member.

[0040] The base is provided with a wire through-hole for passing the wire, and the electromagnetic coil is electrically connected to the current adjustment circuit through the wire.

[0041] Both the access pin and the output pin of the electromagnetic coil are provided at the bottom of the electromagnetic coil, and the access pin and the output pin are electrically connected to the current adjustment circuit through the wire 106.

[0042] Specifically, the acceleration tube is provided on the base, and a high-voltage bracket is provided outside the acceleration tube.

[0043] The insulation device 102 includes an insulation cylinder 1021 and an insulation cover 1022.

[0044] The insulation cylinder is provided outside the high-voltage bracket.

[0045] The insulation cover is provided on the top of the insulation cylinder and the high-voltage bracket and is fixed to the insulation cylinder.

[0046] A high-voltage electrode is provided outside the insulation cylinder, and the high-voltage electrode is provided between the electromagnetic coil and the insulation cylinder.

[0047] Specifically, the electron beam focusing device extends from the control electrode to the bottom end of the acceleration tube and is fixedly connected to the outer shell by means of bolts or glue, etc.

[0048] The magnetic field direction of the electromagnetic coil is perpendicular to the transmission direction of the electron beam. By adjusting the current magnitude in the electromagnetic coil, the magnetic field intensity can be changed, thereby achieving the effects of focusing and constraining the electron beam. In addition, the design of the electromagnetic coil (such as material, winding density, etc.) can also be optimized according to specific requirements to achieve the best focusing and constraining effects.

[0049] To reduce the weight of the electron beam focusing device and facilitate installation, the present invention also opens a plurality of holes on the electron beam focusing device for directly fixing the electron beam focusing device on the outer shell of the acceleration tube. This design not only simplifies the installation process but also improves the stability and reliability of the focusing coil.

[0050] This embodiment provides the design of the electron beam focusing device, enabling the electron beam to be effectively focused and constrained during transmission, improving the stability and concentration of the electron beam current. The tight fixed connection between the electron beam focusing device and the outer shell ensures the stability and reliability of the focusing effect and has good magnetic conduction function.

[0051] Embodiment 2

[0052] This embodiment is basically the same as Embodiment 1, except that:

[0053] The fixing member is insulating glue, and the coil outer shell is fixed to the inner surface of the outer shell cylinder through the insulating glue.

[0054] Embodiment 3

[0055] This embodiment is basically the same as Embodiment 1, except that:

[0056] The coil outer shell is fixed above the base through the fixing member.

[0057] Embodiment 4

[0058] Figure 4 , this embodiment is basically the same as Embodiment 1, except that:

[0059] The electromagnetic coil includes a plurality of sub - coils 501, and a wire 502 is wound around each sub - coil. The sub - coils are stacked and fixed on the outer shell cylinder.

[0060] An insulating device 102 is provided inside the electromagnetic coil.

[0061] Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that these are only examples. The protection scope of the present utility model is defined by the appended claims. Without departing from the principles and essence of the present utility model, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present utility model.

Claims

1. An electron beam focusing device for an electron accelerator, characterized in that: The electron accelerator comprises an outer shell, an insulating device, a base and an accelerating tube, wherein the insulating device is arranged on the outer side of the accelerating tube, and the outer shell is arranged on the outer side of the insulating device. The electron beam focusing device comprises an electromagnetic coil, which is fixed between the outer shell cylinder and the insulating device through a fixing member, and the electromagnetic coil is electrically connected to the current regulating circuit.

2. The electron beam focusing device according to claim 1, characterized in that: The electron beam focusing device comprises a coil shell, the electromagnetic coil is arranged inside the coil shell, and the coil shell is fixed between the shell cylinder and the insulating device through a fixing member.

3. The electron beam focusing device according to claim 2, characterized in that: The fixing member is a clamping member, and the coil housing is fixed to the inner surface of the housing cylinder through the clamping member; or, The fixing member is a bolt, and the coil housing is fixed to the inner surface of the housing cylinder by the bolt.

4. The electron beam focusing device according to claim 2, characterized in that: The fixing member is an insulating glue, and the coil housing is fixed to the inner surface of the housing cylinder by the insulating glue; or, The coil housing is fixed above the base through the fixing member.

5. The electron beam focusing device according to claim 1, characterized in that: The electromagnetic coil comprises a plurality of sub-coils, each of which is wound with a wire, and the sub-coils are stacked and fixed on the outer shell cylinder.

6. The electron beam focusing device according to claim 1, characterized in that: The base is provided with a wire through hole for passing a wire, and the electromagnetic coil is electrically connected to the current regulating circuit through the wire.

7. The electron beam focusing device according to claim 6, characterized in that: The input pin and the output pin of the electromagnetic coil are both arranged at the bottom of the electromagnetic coil, and the input pin and the output pin are electrically connected to the current regulating circuit through a wire.

8. The electron beam focusing device according to claim 1, characterized in that: The accelerating tube is arranged on the base, a high-voltage support is arranged on the outer side of the accelerating tube, the insulating device comprises an insulating tube and an insulating cover, the insulating tube is arranged on the outer side of the high-voltage support, the insulating cover is arranged on the top of the insulating tube and the high-voltage support and fixed to the insulating tube, a high-voltage electrode is arranged on the outer side of the insulating tube, and the high-voltage electrode is arranged between the electromagnetic coil and the insulating tube.

9. A focusing accelerating tube, characterized in that: The focusing accelerating tube comprises an accelerating tube and the electron beam focusing device as claimed in any one of claims 1 to 8.

10. An electron accelerator, characterized in that: The electron accelerator comprises the electron beam focusing device according to any one of claims 1 to 8.

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