Grid adjusting device and electron accelerator

Abstract

The invention discloses a grid adjusting device and an electron accelerator, the electron accelerator comprises a sealing box body, a cathode, a grid plate and a mounting plate, the cathode is mounted in the mounting plate, the grid plate is mounted below the mounting plate and is aligned with the cathode, and the grid adjusting device is used for adjusting the distance between the grid plate and the cathode. The grid electrode adjusting device is suitable for the point light source electron accelerator, provides a technical scheme with variable positions of the cathode and the grid electrode for the light and miniaturized electron accelerator, and can adjust parameters of an electron accelerating electric field so as to meet the requirements of various application scenes.

Description

TECHNICAL FIELD

[0001] The present application relates to a grid adjusting device and an electron accelerator. BACKGROUND

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

[0003] Existing small electron accelerators have poor adaptability and cannot meet the needs of various application scenarios. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defects of the prior art that small electron accelerators have poor adaptability and cannot meet the needs of various application scenarios, and to provide a grid adjusting device and an electron accelerator suitable for point light sources, which provides a technical solution for variable cathode and grid positions for light-weight and small-size electron accelerators, can adjust the parameters of the electron acceleration electric field, and thus meet the needs of various application scenarios.

[0005] The present application solves the above technical problems by the following technical solutions:

[0006] A grid adjusting device for an electron accelerator, the electron accelerator comprising a sealed box body, a cathode, a grid plate, and a mounting plate, the cathode being installed in the mounting plate, the grid plate being installed below the mounting plate and aligned with the cathode, characterized in that the grid adjusting device is used to adjust the distance between the grid plate and the cathode.

[0007] Specifically, the grid adjusting device comprises a magnetic connector,

[0008] The magnetic connector comprises a first magnetic member and a second magnetic member, the first magnetic member being arranged on the outside of the sealed box body, the second magnetic member being arranged on the inside of the sealed box body, the first magnetic member and the second magnetic member being magnetically connected, the first magnetic member being connected with a control member, the second magnetic member being connected with the grid plate, the first magnetic member driving the grid plate to move to adjust the distance between the grid plate and the cathode.

[0009] Preferably, the first magnetic element is disposed on the side of the sealed housing, and the gate adjustment device includes a lead screw and two wedges. One end of the lead screw is fixed to the second magnetic element and the other end is threadedly connected to the first wedge. The second wedge is installed below the mounting plate through a positioning post, and the gate plate is installed on the second wedge. The slope surfaces of the first and second wedges are in contact. The rotation of the lead screw drives the first wedge to move laterally, and the first wedge drives the second wedge to move longitudinally.

[0010] Preferably, a wedge through hole is provided in the middle of the first wedge and the second wedge, and the gate plate is disposed on the bottom surface of the second wedge.

[0011] Preferably, the positioning post is installed below the mounting plate, the four corners of the second wedge are provided with positioning holes that match the positioning post, the bottom of the positioning post is provided with a mounting platform, and a spring supporting the second wedge is provided above the mounting platform.

[0012] Preferably, the top of the first wedge is provided with a groove, and the first wedge is installed on the bottom of the mounting plate through the groove. The lead screw is an insulating ceramic component.

[0013] Preferably, a circular countersunk hole is provided on the inner side wall of the sealed box, and the magnetic connector of the second magnetic component is embedded in the circular countersunk hole, and the magnetic connector of the first magnetic component and the magnetic connector of the second magnetic component are coaxial.

[0014] Preferably, the electron accelerator further includes a laser emitter and a reflector.

[0015] The mounting plate is mounted inside the sealed box. The mounting plate has a mounting hole, the cathode is mounted in the mounting hole, and the reflector is provided on the top of the mounting hole.

[0016] The reflector is a hemispherical surface, and a laser through-hole is provided at the top of the hemispherical surface. The laser through-hole is coaxial with the cathode.

[0017] The emitting end of the laser emitter is aligned with the cathode;

[0018] An electron outlet is located below the gate plate.

[0019] Preferably, a support frame is provided above the mounting plate, and a reflector is provided on the support frame. The laser emitter extends laterally into the sealed housing, and the emitting end is aligned with the cathode through the reflector.

[0020] Preferably, the support frame includes four support columns and a support body. The support columns are installed on the outside of the reflector, the support body is located above the reflector via the support columns, and the reflector is installed on the support body.

[0021] The reflector includes a reflective surface and a reflective support. The reflective support has an L-shaped through hole. The reflective surface is disposed on the reflective support. The laser emitted by the emitting end enters the L-shaped through hole and is reflected by the reflective surface to align with the cathode.

[0022] This application also provides a point source electron accelerator, characterized in that the point source electron accelerator includes the gate adjustment device as described above.

[0023] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0024] The positive and progressive effects of this invention are as follows:

[0025] The gate adjustment device of the present invention is applicable to point source electron accelerators, providing a technical solution for lightweight and miniaturized electron accelerators with variable cathode and gate positions, and can adjust the parameters of the electron accelerating electric field to meet the needs of various application scenarios.

[0026] The present invention also provides a point source electron accelerator, which offers a lightweight and miniaturized electron accelerator design, enabling the accelerator to be applied in a wider range of fields. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the point source electron accelerator according to Embodiment 1 of the present invention.

[0028] Figure 2 This is another structural schematic diagram of the point source electron accelerator of Embodiment 1 of the present invention.

[0029] Figure 3 This is another structural schematic diagram of the point source electron accelerator of Embodiment 1 of the present invention.

[0030] Figure 4 This is another structural schematic diagram of the point source electron accelerator of Embodiment 1 of the present invention.

[0031] Figure 5 This is another structural schematic diagram of the point source electron accelerator of Embodiment 1 of the present invention.

[0032] Figure 6 This is another structural schematic diagram of the point source electron accelerator of Embodiment 1 of the present invention. Detailed Implementation

[0033] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0034] Example 1

[0035] In this embodiment, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for 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 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.

[0036] See Figures 1 to 6 This embodiment provides a point source electron accelerator, which includes a sealed housing 100, a cathode 101, a laser emitter 102, a reflector 103, a gate plate 104, a gate adjustment device, and a mounting plate 105.

[0037] The cathode is mounted inside the mounting plate, and the gate plate is mounted below the mounting plate and aligned with the cathode.

[0038] The gate adjustment device includes a magnetic connector 110.

[0039] The magnetic connector includes a first magnetic element 111 and a second magnetic element 112.

[0040] The first magnetic element 111 is located on the outside of the sealed box.

[0041] The second magnetic element 112 is disposed inside the sealed box.

[0042] The first magnetic element 111 and the second magnetic element 112 are magnetically connected. The first magnetic element 111 is connected to the control element, and the second magnetic element is connected to the gate plate 104.

[0043] The control component can be a hand crank or an electric rotating component, which controls the rotation of the first magnetic component, thereby driving the second magnetic component to rotate.

[0044] The first magnetic element drives the gate plate to move in order to adjust the distance between the gate plate and the cathode.

[0045] The first magnetic element is located on the side of the sealed housing, and the gate adjustment device includes a lead screw 113 and two wedges.

[0046] One end of the lead screw 113 is fixed to the second magnetic component and the other end is threadedly connected to the first wedge block 114.

[0047] The second wedge 115 is mounted below the mounting plate via a positioning post 117, and the gate plate is mounted on the second wedge.

[0048] The first wedge and the second wedge are in contact with each other on their slopes. The rotation of the lead screw causes the first wedge to move laterally, and the first wedge causes the second wedge to move longitudinally.

[0049] The gate adjustment device is used to adjust the distance between the gate plate and the cathode.

[0050] Both the first and second wedges have a wedge through hole 116 in the middle, and the gate plate is located on the bottom surface of the second wedge.

[0051] The positioning post 117 is installed below the mounting plate, and the four corners of the second wedge are provided with positioning holes that match the positioning post.

[0052] Each positioning post 117 has a mounting platform 118 at its bottom, and a spring supporting the second wedge is provided above the mounting platform.

[0053] The top of the first wedge is provided with a sliding groove, and the first wedge is installed on the bottom of the mounting plate through the sliding groove. The lead screw is an insulating ceramic component.

[0054] A circular countersunk hole 119 is provided on the inner side wall of the sealed box. The magnetic connector of the second magnetic component is embedded in the circular countersunk hole. The magnetic connectors of the first magnetic component and the second magnetic component are coaxial.

[0055] In this embodiment, the cathode is made of tungsten, which generates electrons when heated.

[0056] The mounting plate 105 is mounted inside the sealed box. The mounting plate 105 has a mounting hole 1051. The cathode 101 is installed in the mounting hole 1051. The reflector is provided on the top of the mounting hole.

[0057] The reflector 103 is a hemispherical surface, and a laser through hole 1031 is provided at the top of the hemispherical surface. The laser through hole 1031 is coaxial with the cathode 101.

[0058] The hemisphere in this embodiment is not a hemisphere passing through the center of a sphere in the strict sense; the hemisphere is only used for ease of description.

[0059] In fact, the height of the reflector can be less than the radius of the sphere, and its shape does not have to be strictly made according to the spherical shape. See a flashlight. The shape of the reflector can be adjusted appropriately to reflect the electrons back.

[0060] The emitting end of the laser emitter is aligned with the cathode.

[0061] The gate plate is mounted below the mounting plate and aligned with the mounting hole, and an electron outlet is provided below the gate plate.

[0062] A support frame 106 is provided above the mounting plate 105, and a reflector 107 is provided on the support frame 106.

[0063] The laser emitter 102 extends laterally into the sealed housing, and the emitting end is aligned with the cathode via a reflector.

[0064] The laser emitter is sealed to the sealed enclosure to ensure a vacuum environment inside the enclosure.

[0065] The support frame 106 includes four support columns 1061 and a support body 1062, with the support columns installed on the outside of the reflector.

[0066] The supporting body is mounted above the reflector via a support column, and the reflector 107 is mounted on the supporting body.

[0067] The reflector 107 includes a reflective surface 1071 and a reflective bracket 1072. The reflective bracket 1072 has an L-shaped through hole, and the reflective surface 1071 is disposed on the reflective bracket.

[0068] The laser emitted from the transmitting end enters the L-shaped through-hole and is reflected by the reflective surface, aligning with the cathode.

[0069] The center of the mounting plate is a countersunk hole, that is, the mounting hole is a countersunk hole, and the cathode is fixed in the countersunk hole.

[0070] The side wall of the sealed enclosure is provided with a vacuum pump connection hole 108, and the vacuum pump of the point light source electron accelerator is connected to the vacuum pump connection hole.

[0071] A copper grid plate 1002 is provided inside the bottom plate 1001 of the sealed enclosure. A titanium film is provided on the bottom surface of the copper grid plate. The copper grid plate is aligned with the gate plate and the shape of the copper grid plate matches the shape of the gate plate.

[0072] The cathode is electrically connected to the mounting plate, and the gate plate is electrically connected to the mounting plate through a gate resistor.

[0073] The top plate of the sealed enclosure is equipped with an electrical inlet, and the power cord is electrically connected to the mounting plate through the electrical inlet. The power supply is negative high-voltage high-frequency electricity.

[0074] A negative high-voltage, high-frequency current is applied to the cathode, and the laser heats the cathode until it reaches the activation temperature. The cathode then begins to emit electrons, and the grid attracts these electrons, which are then emitted from the electron outlet.

[0075] The point source electron accelerator in this embodiment provides a lightweight and miniaturized electron accelerator design, enabling wider applications of the accelerator.

[0076] The gate adjustment device is suitable for point source electron accelerators, providing a technical solution for lightweight and miniaturized electron accelerators with variable cathode and gate positions. It can adjust the parameters of the electron accelerating electric field to meet the needs of various application scenarios.

[0077] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention 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 present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A grid adjustment device for an electron accelerator comprising a sealed housing, a cathode, a grid plate and a mounting plate, said cathode being mounted in said mounting plate, said grid plate being mounted below said mounting plate and in alignment with said cathode, characterized in that, The grid adjusting device is used to adjust the distance between the grid plate and the cathode.

2. The grid adjustment apparatus of claim 1, wherein, The grid adjusting device comprises a magnetic connector, the magnetic connector comprises a first magnetic element and a second magnetic element, the first magnetic element is arranged outside the sealed box, the second magnetic element is arranged inside the sealed box, the first magnetic element and the second magnetic element are magnetically connected, the first magnetic element is connected with a control element, the second magnetic element is connected with the grid plate, the first magnetic element drives the grid plate to move to adjust the distance between the grid plate and the cathode.

3. The grid adjustment apparatus of claim 2, wherein, The first magnetic element is arranged on the side of the sealed box, the grid adjusting device comprises a lead screw and two wedge blocks, one end of the lead screw is fixed with the second magnetic element and the other end is threadedly connected with the first wedge block, the second wedge block is installed below the mounting plate through a positioning column, the grid plate is installed on the second wedge block, the slope surfaces of the first wedge block and the second wedge block are matched, the rotation of the lead screw drives the first wedge block to move horizontally, and the first wedge block drives the second wedge block to move longitudinally.

4. The grid adjustment apparatus of claim 3, wherein, The middle of the first wedge block and the middle of the second wedge block are both provided with a wedge block through hole, and the grid plate is arranged on the bottom surface of the second wedge block.

5. The grid adjustment apparatus of claim 3, wherein, The positioning column is installed below the mounting plate, four corners of the second wedge block are provided with positioning holes matched with the positioning column, and the bottom of the positioning column is provided with a mounting table, and the top of the mounting table is provided with a spring supporting the second wedge block.

6. The grid adjustment apparatus of claim 3, wherein, The top of the first wedge block is provided with a sliding groove, the first wedge block is installed on the bottom of the mounting plate through the sliding groove, and the lead screw is an insulating ceramic element.

7. The grid adjustment apparatus of claim 3, wherein, The inner side of the side wall of the sealed box is provided with a circular counterbore, a magnetic connector of the second magnetic element is embedded in the circular counterbore, and the magnetic connector of the first magnetic element is coaxial with the magnetic connector of the second magnetic element.

8. The grid adjustment apparatus of claim 1, wherein, The electron accelerator further comprises a laser emitter, a reflecting cover, The mounting plate is arranged in the sealed box, the mounting plate is provided with a mounting hole, the cathode is mounted in the mounting hole, and the top of the mounting hole is provided with the reflecting cover. The reflecting cover is a hemispherical surface, the top of the hemispherical surface is provided with a laser through hole, and the laser through hole is coaxial with the cathode. The emitting end of the laser emitter is aligned with the cathode. The bottom of the grid plate is provided with an electron outlet.

9. The grid adjustment apparatus of claim 8, wherein, The top of the mounting plate is provided with a support frame, the support frame is provided with a reflector, the laser emitter penetrates into the sealed box laterally, and the emitting end is aligned with the cathode through the reflector. The support frame comprises four support columns and a support body, the support columns are installed outside the reflecting cover, the support body is arranged above the reflecting cover through the support columns, and the reflector is installed on the support body. The reflector comprises a reflecting surface and a reflecting bracket, the reflecting bracket is provided with an L-shaped through hole, the reflecting surface is arranged on the reflecting bracket, and the laser emitted by the emitting end is aligned with the cathode after being reflected on the reflecting surface.

10. A point source electron accelerator characterized by, The point light source electron accelerator comprises the grid adjusting device according to any one of claims 1 to 9.

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