Electrode sheet device, acceleration tube device, and electron accelerator

Abstract

The application discloses an electrode sheet device, an accelerating tube device and an electron accelerator. The accelerating tube device is used for an accelerating tube of an electron accelerator. The accelerating tube comprises a plurality of electrode sheet devices. Each electrode sheet device comprises an electrode sheet body, a beam hole and a ring-shaped conductor. The beam hole is arranged at the center of the electrode sheet body. The ring-shaped conductor is arranged below the electrode sheet body and coaxially arranged with the beam hole. The ring-shaped conductor is arranged outside the beam hole and electrically connected with the electrode sheet body. The electrode sheet device can balance the potential difference on the electrode sheet, reduce the voltage at the position of the beam hole of the electrode sheet during the operation of the electron accelerator, reduce the heat generation, increase the heat dissipation performance, improve the overall safety of the accelerating tube, and improve the focusing effect and reduce the bombardment of stray electrons to the electrode sheet.

Description

Technical Field

[0001] This invention relates to an electrode plate device, an accelerator tube device, and an electron accelerator. Background Technology

[0002] An electron accelerator is a device used to accelerate charged particles. High-frequency, high-voltage accelerators use a combination of high-frequency and high-voltage electric fields to accelerate charged particles to high energies. They are widely used in research fields including particle physics, nuclear physics, and materials science. Electron accelerators can operate 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 physics phenomena or for medical radiation therapy.

[0003] Accelerator tubes are the core components of particle accelerators, responsible for accelerating electrons in a vacuum environment through a potential difference.

[0004] In existing accelerator tube devices, the electrode plates are prone to high-temperature sublimation after being struck by electrons, which can disrupt the vacuum environment and pose a safety hazard. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that the electrode plates in the accelerator tube device are prone to high-temperature sublimation after being hit by electrons, which will destroy the vacuum environment and pose a safety hazard. The present invention provides an electrode plate device, accelerator tube device and electron accelerator that can balance the potential difference on the electrode plate, reduce the voltage at the beam hole position of the electrode plate when the electron accelerator is working, reduce heat generation and increase heat dissipation performance, improve the overall safety of the accelerator tube, and improve the focusing effect and reduce stray electron bombardment.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] An electrode assembly for an accelerating tube assembly of an electron accelerator, the accelerating tube assembly comprising a plurality of the electrode assemblies, characterized in that...

[0008] Each electrode assembly includes an electrode body, a beam aperture, and a ring conductor.

[0009] The beam aperture is located at the center of the electrode sheet body.

[0010] The annular conductor is located below the electrode body and coaxial with the beam aperture.

[0011] The annular conductor is located outside the beam aperture and is electrically connected to the electrode body.

[0012] Preferably, the edge of the beam aperture is provided with a downwardly protruding beam ring, and the annular conductor is sleeved on the outside of the beam ring, with the beam ring and the electrode sheet body being integrally formed.

[0013] Preferably, the lower end of the beam ring has an outwardly curved extended outer edge, the cross-section of the annular conductor is circular, and the shape of the beam ring matches the shape of the annular conductor.

[0014] Preferably, the outer side of the electrode body is provided with a current-leading connector, the electrode device is installed inside the ceramic tube of the accelerator tube device, and the current-leading conductor passes through the current-leading hole on the ceramic tube and is connected to the current-leading connector.

[0015] Preferably, a notch is provided on the outer side of the electrode body, and the power lead connector includes a screw hole and a mounting groove. The width of the mounting groove matches the thickness of the electrode body, and the power lead connector is installed in the notch through the mounting groove.

[0016] Preferably, one end of the current-leading conductor is installed in the screw hole of the current-leading connector and the other end of the current-leading conductor is connected to the anode resistor of the electron accelerator.

[0017] Preferably, the outer end of the power lead connector is provided with a pressure dividing curved panel, the shape of which matches the inner surface of the ceramic tube, and the connection position between the power lead connector and the electrode plate body is smoothed by oxyfluorine welding.

[0018] Preferably, the accelerator tube device includes at least one standard accelerator tube module and several insulating posts.

[0019] The accelerator tube standard module includes the ceramic tube, which has several electrical lead holes.

[0020] The electrode sheet devices and insulating pillars are alternately stacked in the guide groove, and each electrode sheet device is horizontally aligned with a current-inducing hole.

[0021] The current-leading conductor is electrically connected to the electrode plate device through the current-leading hole, and the current-leading conductor and the current-leading hole are sealed together.

[0022] The acceleration tube device includes several plungers. Both ends of the insulating column are provided with countersunk holes, and the guide protrusion is provided with a guide through hole. When the guide protrusion and the insulating column are alternately superimposed in the guide groove, the plunger passes through the guide through hole and is installed in the countersunk hole of the insulating column.

[0023] The present invention also provides an accelerator tube device, characterized in that the accelerator tube device includes the electrode sheet device as described above.

[0024] The present invention also provides an electron accelerator, characterized in that the electron accelerator includes the acceleration tube device as described above.

[0025] 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.

[0026] The positive and progressive effects of this invention are as follows:

[0027] The electrode plate device of this invention can balance the potential difference on the electrode plate, reduce the voltage at the beam aperture of the electrode plate during electron accelerator operation, reduce heat generation while increasing heat dissipation performance, improve the overall safety of the accelerator tube, and also improve the focusing effect and reduce stray electron bombardment of the electrode plate. The accelerator tube device of this invention has a stable structure, low scrap rate, simple installation and operation, and is easy to manufacture. The number of accelerator tube modules can be adjusted to adapt to accelerator tubes with different voltage values. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the electrode sheet device according to Embodiment 1 of the present invention.

[0029] Figure 2 This is another structural schematic diagram of the electrode sheet device according to Embodiment 1 of the present invention.

[0030] Figure 3 This is another structural schematic diagram of the electrode sheet device according to Embodiment 1 of the present invention.

[0031] Figure 4 This is a schematic diagram of the electrical connector of Embodiment 1 of the present invention.

[0032] Figure 5 This is a schematic diagram of the accelerator tube device according to Embodiment 1 of the present invention.

[0033] Figure 6 This is another structural schematic diagram of the accelerator tube device according to Embodiment 1 of the present invention.

[0034] Figure 7 This is another structural schematic diagram of the accelerator tube device according to Embodiment 1 of the present invention.

[0035] Figure 8 This is a schematic diagram of the structure of the ceramic tube in Embodiment 1 of the present invention.

[0036] Figure 9 This is a schematic diagram of the accelerator tube device according to Embodiment 1 of the present invention.

[0037] Figure 10 This is another structural schematic diagram of the accelerator tube device according to Embodiment 1 of the present invention.

[0038] Figure 11This is a schematic diagram of the electron accelerator according to Embodiment 1 of the present invention.

[0039] Figure 12 This is a schematic diagram of the electrode sheet device according to Embodiment 1 of the present invention. Detailed Implementation

[0040] 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.

[0041] Example 1

[0042] 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.

[0043] See Figures 1 to 12 This embodiment provides an electron accelerator, which includes an acceleration tube device.

[0044] The accelerator tube device includes at least one accelerator tube standard module, several insulating pillars 111, current-leading conductors 112, and electrode sheet device 103. In this embodiment, the number of accelerator tube standard modules is two.

[0045] The electrode device of this application is an electrode inside the accelerator tube, which plays the role of accelerating electrons. Unlike the electrode in the prior art, the electrode device of this application has the functions of balancing the potential difference on the electrode, reducing the voltage at the beam hole position of the electrode during the operation of the electron accelerator, reducing heat generation and increasing heat dissipation performance, and improving the overall safety of the accelerator tube.

[0046] The accelerator tube standard module in this embodiment is easy to assemble. Each accelerator tube standard module can be used as a unit alone, or multiple accelerator tube standard modules can be spliced ​​together to meet the assembly requirements of different high-voltage electron accelerators.

[0047] For example, an accelerator tube with a maximum voltage of m can be manufactured using one standard accelerator tube module, while an accelerator tube with a maximum voltage of 2m can be manufactured using two standard accelerator tube modules.

[0048] The accelerator tube device includes several stacked electrode sheet devices.

[0049] Each electrode assembly 103 includes an electrode body 1031, a beam aperture 1035, and an annular conductor 1036.

[0050] The beam aperture 1035 is located at the center of the electrode sheet body.

[0051] The annular conductor 1036 is located below the electrode body 1031 and is coaxial with the beam hole 1035.

[0052] The annular conductor 1036 is disposed on the outside of the beam aperture and electrically connected to the electrode sheet body 1031. In this embodiment, the annular conductor is in contact with and attached to the electrode sheet body.

[0053] The edge of the beam aperture is provided with a downwardly protruding beam ring 1037.

[0054] The annular conductor 1037 is sleeved on the outside of the beam ring, and the beam ring 1037 is integrally formed with the electrode sheet body.

[0055] The beam ring can improve the beam effect and also serve to fix the connection of the ring conductor.

[0056] The lower end of the beam ring has an outwardly curved extended outer edge.

[0057] The cross-section of the annular conductor is circular, and the shape of the beam ring matches the shape of the annular conductor.

[0058] The outwardly curved extended edge can fix the annular conductor and eliminate tip discharge at the beam aperture location, preventing tip discharge.

[0059] The annular conductor is made of a material with high conductivity and high heat dissipation. In this embodiment, it is made of electrolytic copper, but silver, copper, and other materials can also be used. The high conductivity can balance the potential difference on the electrode plate. When electrons accelerated by the electron accelerator hit the electrode plate, a potential difference will be generated instantaneously, which will generate high temperature. This application uses an annular conductor to reduce the voltage at the beam hole position of the electrode plate when the electron accelerator is working, reduce the heat generation, increase the heat dissipation performance, improve the overall safety of the accelerator tube, and the electrode plate device can also improve the focusing effect and reduce stray electrons bombarding the electrode plate.

[0060] The electrode sheet body is provided with an electrical connector 1038 on the outside, and the electrode sheet is installed inside the ceramic tube of the accelerator tube.

[0061] The current-leading conductor 112 passes through the current-leading hole on the ceramic tube and is connected to the current-leading connector.

[0062] The electrode sheet body 1031 has a notch 10311 on the outer side, and the power lead connector 1038 includes a screw hole and a mounting groove 10381.

[0063] The width of the mounting groove matches the thickness of the electrode sheet body, and the electrical connector is installed in the recess 10311 through the mounting groove.

[0064] One end of the current-leading conductor 112 is installed in the screw hole of the current-leading connector, and the other end of the current-leading conductor is connected to the anode resistor of the electron accelerator.

[0065] The outer end of the electrical connector is provided with a pressure-dividing curved panel 10382, the shape of which matches the inner surface of the ceramic tube.

[0066] The connection position between the power lead connector 1038 and the electrode sheet body 103 is smoothed by oxy-fluorine welding, that is, the connection position between the power lead connector 1038 and the electrode sheet body 103 is provided with a smoothing part 10383.

[0067] The annular conductor is made of electrolytic copper or silver. The electrode body is provided with ventilation holes 1039 to improve efficiency during vacuuming. The ventilation holes of two adjacent electrode plates are staggered (non-axial) to prevent electrons from being accelerated by the ventilation holes of the two electrode plates.

[0068] The accelerator tube standard module includes a ceramic tube 101, and the inner surface of the ceramic tube is provided with a plurality of guide grooves 113.

[0069] The shape of the insulating post 11 matches the guide groove 113, and the ceramic tube is provided with a plurality of power-leading holes 104.

[0070] The electrode sheet device 103 includes an electrode sheet body 1031, and a guide protrusion 1032 is provided on the outer edge of the electrode sheet body 1031.

[0071] The shape of the guide protrusion 1032 matches the guide groove 113.

[0072] The guide protrusions and insulating pillars are alternately stacked in the guide groove, and each electrode plate is horizontally aligned with a current-inducing hole.

[0073] The current-leading conductor 112 is electrically connected to the electrode plate device through the current-leading hole, and the current-leading conductor and the current-leading hole are sealed.

[0074] The acceleration tube device includes several plungers 114, with countersunk holes at both ends of the insulating column, and a guide through hole 1033 inside the guide protrusion 1032.

[0075] When the guide protrusion and the insulating post are alternately superimposed in the guide groove, the plunger 114 passes through the guide through hole and is installed in the countersunk hole of the insulating post.

[0076] The guide protrusions are semi-circular in shape and number three. Each ceramic tube has three guide grooves. One side of the insulating post matches the shape of the guide groove, and the other side is a plane.

[0077] An annular groove 115 is provided on the inner surface between two adjacent electrode devices of the ceramic tube. Multiple annular grooves are evenly distributed inside the ceramic tube, and the electrode devices are located between two adjacent annular grooves.

[0078] The annular groove can increase the creepage distance and improve the safety performance of the accelerator tube.

[0079] The accelerator tube standard module also includes connectors.

[0080] The ceramic tube is equipped with connectors at both the top and bottom;

[0081] The top connector is used to connect to the flange 102 on the accelerator tube or the bottom of another ceramic tube;

[0082] The bottom connector is used to connect to the lower flange of the accelerator tube or the top of another ceramic tube;

[0083] The inner surface of the ceramic tube is provided with several electrode plate mounting positions for mounting electrode plate devices 103.

[0084] The outer surface of the ceramic tube is provided with several lead holes 104 for connecting voltage divider resistors.

[0085] The connector includes a fixing element and a mounting groove 105 provided on the outer surface of the ceramic tube.

[0086] The top mounting groove 105 has a mounting hole 106 above it, and the bottom mounting groove 105 has a mounting hole 106 below it.

[0087] The fasteners include a screw and a nut.

[0088] When two adjacent ceramic tubes are connected, the mounting holes are aligned and secured with screws and nuts.

[0089] After inserting the screw into the mounting hole, install another ceramic tube into the screw, and then use two nuts to fix the upper and lower ceramic tubes respectively.

[0090] Both the upper flange 102 and the lower flange of the accelerator tube are provided with threaded holes that match the screw.

[0091] A flange 107 is provided between the top of the ceramic tube and the mounting groove. The flange can increase the installation area, increase the tube wall thickness, and reduce the scrap rate.

[0092] The ceramic tube has a sealing ring groove 108 at its top end, which is located inside the mounting hole. The sealing ring groove can also be located on the bottom end face of the ceramic tube.

[0093] The sealing ring groove is sealed to the bottom of another ceramic tube via a metal sealing ring.

[0094] Similar sealing ring grooves can also be provided on the upper flange and lower flange of the accelerator tube for sealing the ceramic tube.

[0095] The mounting slot includes several square holes, and each square hole contains one mounting hole.

[0096] The ceramic tube is an integrally formed structure formed by isostatic pressing and high-temperature sintering, and the power inlet hole and mounting groove are formed by grinding.

[0097] 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. An electrode assembly for an accelerating tube assembly of an electron accelerator, the accelerating tube assembly comprising a plurality of the electrode assemblies, characterized in that, Each electrode assembly includes an electrode body, a beam aperture, and a ring conductor. The beam aperture is located at the center of the electrode sheet body. The annular conductor is located below the electrode body and coaxial with the beam aperture. The annular conductor is located outside the beam aperture and is electrically connected to the electrode body. The edge of the beam aperture is provided with a downwardly protruding beam ring, and the annular conductor is sleeved on the outside of the beam ring. The beam ring and the electrode sheet body are integrally formed.

2. The electrode sheet device as described in claim 1, characterized in that, The lower end of the beam ring has an outwardly curved extended outer edge, the cross-section of the annular conductor is circular, and the shape of the beam ring matches the shape of the annular conductor.

3. The electrode sheet device as described in claim 1, characterized in that, The electrode body is provided with an electrical connection on its outer side. The electrode device is installed inside the ceramic tube of the accelerator tube device. The electrical conductor passes through the electrical hole on the ceramic tube and is connected to the electrical connection.

4. The electrode sheet device as described in claim 3, characterized in that, The electrode body has a notch on its outer side. The power lead connector includes a screw hole and a mounting groove. The width of the mounting groove matches the thickness of the electrode body. The power lead connector is installed in the notch through the mounting groove.

5. The electrode sheet device as described in claim 4, characterized in that, One end of the current-leading conductor is installed in the screw hole of the current-leading connector, and the other end of the current-leading conductor is connected to the anode resistor of the electron accelerator.

6. The electrode sheet device as described in claim 4, characterized in that, The outer end of the power lead connector is provided with a pressure dividing curved plate. The shape of the pressure dividing curved plate matches the inner surface of the ceramic tube. The connection position between the power lead connector and the electrode plate body is smoothed by oxyfluorine welding.

7. The electrode sheet device as described in claim 3, characterized in that, The accelerator tube assembly includes at least one standard accelerator tube module and several insulating pillars. The accelerator tube standard module includes the ceramic tube, which has several electrical lead holes. The electrode sheet devices and insulating pillars are alternately stacked in the guide groove, and each electrode sheet device is horizontally aligned with a current-inducing hole. The current-leading conductor is electrically connected to the electrode plate device through the current-leading hole, and the current-leading conductor and the current-leading hole are sealed together. The acceleration tube device includes several plungers. Both ends of the insulating column are provided with countersunk holes, and the guide protrusion is provided with a guide through hole. When the guide protrusion and the insulating column are alternately superimposed in the guide groove, the plunger passes through the guide through hole and is installed in the countersunk hole of the insulating column.

8. An accelerator tube device, characterized in that, The electron accelerator includes the electrode sheet device as described in any one of claims 1 to 7.

9. An electron accelerator, characterized in that, The electron accelerator includes the accelerator tube device as described in claim 8.

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