Axial gradually-changing high-frequency injection wave interaction circuit structure of gyro-traveling wave tube

Abstract

The application discloses a gyrotron traveling wave tube axial gradually changing loading high-frequency injection wave interaction circuit structure, relates to vacuum electron technology, and comprises a loading section heat dissipation metal cylinder, a first hollow cylindrical surface and a second hollow cylindrical surface which are coaxial, the radius of the first hollow cylindrical surface is greater than that of the second hollow cylindrical surface, a second substructure as a metal cylinder high-frequency interaction section, gradually changing attenuation ceramic sections arranged at both ends of the hollow cylindrical surface of the first substructure, and the thickness of the gradually changing attenuation ceramic of each section of the gradually changing attenuation ceramic sections of the two parts gradually increases in the axial direction towards the middle part of the first substructure, uniform attenuation ceramic arranged between the gradually changing attenuation ceramic sections of the two parts, and an electron beam channel with a coaxial fixed radius formed based on the hollow cylindrical surfaces of the first substructure and the second substructure. The structure combining axial attenuation at both ends and uniform attenuation can realize precisely controllable attenuation, and can greatly improve the gain, bandwidth and working stability of the gyrotron traveling wave tube.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum electron technology, and in particular to a gyrotron tube axial gradually changing loaded high-frequency injection wave interaction circuit structure. BACKGROUND

[0002] The gyrotron tube is widely used in millimeter wave satellite imaging, satellite cataloging, precise weather forecasting, precise guidance, communication, electronic countermeasures, particle accelerators, microwave remote sensing, thermonuclear fusion, microwave energy application, and other scientific research, industrial, military and civilian microwave electronic systems.

[0003] The traditional gyrotron tube has a periodic ceramic loaded structure for the high-frequency structure, and belongs to a sudden attenuation mode, which is limited in output power, gain, bandwidth and efficiency. SUMMARY

[0004] The gyrotron tube axial gradually changing loaded high-frequency injection wave interaction circuit structure provided by the embodiments of the present application adopts a structure combining axial gradually changing attenuation and uniform attenuation, can realize precisely controllable attenuation, and can greatly improve the gain, bandwidth and working stability of the gyrotron tube.

[0005] The gyrotron tube axial gradually changing loaded high-frequency injection wave interaction circuit structure provided by the embodiments of the present application includes:

[0006] The loaded section heat dissipation metal cylinder 9 includes a first substructure and a second substructure, the first substructure and the second substructure include coaxial first and second hollow cylindrical surfaces in the axial direction, and the radius of the first hollow cylindrical surface is greater than that of the second hollow cylindrical surface;

[0007] The second substructure is a metal cylindrical high-frequency interaction section 11;

[0008] The gradually changing attenuation ceramic section includes multiple sections of gradually changing attenuation ceramics, is arranged at both ends of the hollow cylindrical surface of the first substructure, and the thickness of each section of gradually changing attenuation ceramic of the gradually changing attenuation ceramic section of the two parts gradually increases towards the middle of the first substructure in the axial direction;

[0009] The uniform attenuation ceramic 8 is arranged between the two parts of gradually changing attenuation ceramics;

[0010] An electron beam channel with a coaxial fixed radius is formed based on the gradually changing attenuation ceramic, the uniform attenuation ceramic 8 and the hollow cylindrical surface of the second substructure.

[0011] Optionally, the gradually changing attenuation ceramic section and the uniform attenuation ceramic section 8 are both cylindrical structures with the same inner diameter and outer diameter, and the material is beryllium oxide;

[0012] The two-part gradually attenuating ceramic includes multi-section gradually attenuating ceramic, and the gradually attenuating ceramic at both ends of the first substructure has the minimum thickness, and the thickness gradually increases in the axial direction towards the middle of the first substructure.

[0013] Optionally, the gradually attenuating ceramic section includes no less than two gradually attenuating ceramics, and the uniform attenuating ceramic 8 includes no less than two uniform attenuating ceramics.

[0014] The heat insulation gaskets 7 are arranged between the gradually attenuating ceramics, between the gradually attenuating ceramic and the uniform attenuating ceramic 8, and between the uniform attenuating ceramics 8.

[0015] Optionally, the heat insulation gaskets 7 are made of oxygen-free copper material, and the heat insulation gaskets 7 have the same specification to form the coaxial electron beam channel with the same fixed radius.

[0016] Optionally, the gradually attenuating ceramics, the uniform attenuating ceramic 8 and the heat insulation gaskets 7 are coaxially sleeved in the first hollow cylindrical surface.

[0017] Optionally, the metal cylindrical high-frequency interaction section 11 is made of oxygen-free copper material, and the metal cylindrical high-frequency interaction section 11 is coaxial with the first hollow cylindrical surface.

[0018] The embodiment of the present application adopts the gyrotron traveling wave tube axial gradually attenuating ceramic structure, the initial section of the high-frequency structure gradually increases the attenuation amount of the axial attenuating ceramic to a certain value, then maintains uniform attenuation for a distance, and finally gradually decreases the attenuation amount of the axial attenuating structure to a certain value. The scheme of the present application can greatly improve the gain, bandwidth and working stability of the gyrotron traveling wave tube.

[0019] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar components. In the drawings:

[0021] Figure 1 The cross-sectional structure of the gyrotron traveling wave tube axial gradually attenuating high-frequency beam interaction circuit structure of the embodiment of the present application is shown in the figure.

[0022] Figure 2The cross-sectional structure of the embodiment of the application is schematically shown in the figure. DETAILED DESCRIPTION

[0023] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0024] The embodiment of the application provides a gyrotron traveling wave tube axial gradually changing high-frequency injection wave interaction circuit structure, as shown in Figure 1 、 Figure 2 , comprising:

[0025] The heat dissipation metal cylinder 9 of the loading section comprises a first substructure and a second substructure, and the first substructure and the second substructure comprise coaxial first hollow cylindrical surfaces and second hollow cylindrical surfaces in the axial direction, the radius of the first hollow cylindrical surface is greater than the radius of the second hollow cylindrical surface, that is Figure 1 The outer surfaces of the first substructure and the second substructure are flush, and the first substructure and the second substructure form a tubular structure with two sections in communication.

[0026] The second substructure is a metal cylindrical high-frequency interaction section 11.

[0027] The gradually changing attenuation ceramic section comprises multiple gradually changing attenuation ceramics, and is arranged at both ends of the hollow cylindrical surface of the first substructure, and the thickness of each gradually changing attenuation ceramic of the two-part gradually changing attenuation ceramic section gradually increases towards the middle of the first substructure in the axial direction. That is Figure 1 The two ends of the first hollow cylindrical surface of the heat dissipation metal cylinder 9 of the loading section are provided with two parts of gradually changing attenuation ceramics (head and tail).

[0028] The uniform attenuation ceramic 8 is arranged between the two parts of gradually changing attenuation ceramics, that is, the uniform attenuation ceramic 8 is arranged between the head and tail gradually changing attenuation ceramics in the first hollow cylindrical surface.

[0029] Based on the gradually changing attenuation ceramic, the uniform attenuation ceramic 8, and the hollow cylindrical surface of the second substructure, an electron beam channel with a coaxial fixed radius is formed, and the electron beam channel is used for passing the electron beam 10.

[0030] The application adopts two-section axial gradually attenuating ceramic structure and periodic attenuating ceramic structure, simulation shows that the ceramic attenuation increases with the increase of ceramic thickness, in the millimeter wave band, under the same power level, the combination of two-section axial gradually attenuating ceramic structure and uniform attenuating ceramic structure can increase the gain of the gyrotron by more than 10 dB, the bandwidth can be increased by more than 1 GHz, and the operation is more stable and reliable.

[0031] In some embodiments, the gradually attenuating ceramic section and the uniform attenuating ceramic section 8 are both cylindrical structures with the same inner diameter and outer diameter, and the material is beryllium oxide.

[0032] The two-section gradually attenuating ceramic includes multiple sections of gradually attenuating ceramic, and the thickness of the gradually attenuating ceramic at both ends of the first substructure is the smallest, and the thickness gradually increases towards the middle of the first substructure in the axial direction.

[0033] As shown in Figure 1 The gradually attenuating ceramic section includes gradually attenuating ceramic 1, gradually attenuating ceramic 2, gradually attenuating ceramic 3, gradually attenuating ceramic 4, gradually attenuating ceramic 5, and gradually attenuating ceramic 6, as shown in Figure 1 The other end of the gradually attenuating ceramic section also has multiple sections of gradually attenuating ceramic, and the thickness of the gradually attenuating ceramic in the middle is the thickest, and the thickness of the gradually attenuating ceramic at both ends of the first substructure is the smallest.

[0034] In a specific example, as shown in Figure 2 The inner diameter of all the gradually attenuating ceramic and the uniform attenuating ceramic in the device structure of the application is R1, and the outer diameter is R2, the thickness of each gradually attenuating ceramic gradually changes from L1 to L7, and L1≤L2≤L3≤L4≤L5≤L6≤L7, the thickness of each uniform attenuating ceramic is L7. The axial gradually attenuating amount gradually increases on the left side, and the axial gradually attenuating amount gradually decreases on the right side, the increasing attenuation section and the decreasing attenuation section are located on the left and right sides of the uniform attenuating ceramic, and are coaxially connected in the first hollow cylindrical surface.

[0035] In some embodiments, the gradually attenuating ceramic section includes not less than two sections of gradually attenuating ceramic, and the number of the uniform attenuating ceramic 8 is not less than two, as shown in Figure 1 In the embodiment, multiple uniform attenuating ceramics 8 are arranged between the two sections of gradually attenuating ceramic.

[0036] As shown in Figure 1 Thermal insulation pads 7 are arranged between each section of gradually attenuating ceramic, between the gradually attenuating ceramic and the uniform attenuating ceramic 8, and between the uniform attenuating ceramics 8.

[0037] In some embodiments, the thermal insulation gaskets 7 are made of oxygen-free copper material, and have the same specifications. In some embodiments, the gradient attenuation ceramics, the uniform attenuation ceramics 8 and the thermal insulation gaskets 7 are coaxially sleeved in the first hollow cylinder. Figure 2 As shown in the figure, in a specific example, the inner diameter of the thermal insulation gasket 7 is R1, the outer diameter is R2, and the thickness is L8. The coaxial inlay between each section of the attenuation ceramic plays a role of heat conduction and fluid conduction.

[0038] In some embodiments, the metal cylinder high-frequency interaction section 11 is made of oxygen-free copper material, and is coaxial with the second hollow cylinder.

[0039] The inner diameter of the first substructure corresponding metal cylinder is R2 (the radius of the second hollow cylinder), the outer diameter is R3, and the height is the sum of the gradient attenuation ceramics and the uniform attenuation ceramics. All the gradient attenuation ceramics, the uniform attenuation ceramics and the thermal insulation gaskets are coaxially sleeved in the loaded section heat dissipation metal cylinder.

[0040] The attenuation amount is adjusted by changing the thickness of the gradient attenuation ceramic, that is, by changing the thickness of the attenuation ceramic, in this example, by changing the sizes of L1, L2, L3, L4, L5, L6 and L7 to finely adjust the attenuation amount, and satisfying L1≤L2≤L3≤L4≤L5≤L6≤L7.

[0041] When the high-gain gyrotron traveling wave tube axial gradient loading attenuation ceramic structure works, the high-energy electron beam in the area where the gradient attenuation ceramic and the uniform attenuation ceramic are located interacts with the high-frequency field. Since the structure has gradually increasing attenuation, uniform attenuation and gradually decreasing attenuation, the attenuation does not change abruptly, which can effectively improve the gain, bandwidth and stability of the gyrotron traveling wave tube.

[0042] The embodiments of the present application adopt a gyrotron traveling wave tube axial gradient loading ceramic structure. The initial section of the high-frequency structure has gradually increasing attenuation to a certain value, then maintains uniform attenuation for a distance, and finally gradually decreases the axial attenuation to a certain value through the axial gradient attenuation structure. The scheme of the present application can greatly improve the gain, bandwidth and working stability of the gyrotron traveling wave tube.

[0043] It should be noted that in the embodiments of the present application, the terms “comprising”, “including” or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, the element defined by the statement “including a…” does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0044] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent advantages or disadvantages of the embodiments.

[0045] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, but not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims, and these all belong to the protection of the present application.

Claims

1. 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high-frequency interaction section (11) and a metal cylinder high-frequency interaction section (11) and a metal cylinder high-frequency interaction section (11) and a metal cylinder high-frequency interaction section (11) and a metal cylinder high-frequency interaction section (11) and a metal cylinder high-frequency interaction section (11) and a metal cylinder high-frequency interaction section (11) and a metal cylinder high-frequency interaction section (11) and a metal cylinder high-frequency interaction section (11 ​ ​ ​ ​ ​ ​ ​ 2. The axially graded load high frequency beam interaction circuit structure for a gyrotron as claimed in claim 1, wherein, ​ ​ 3. The axially graded load high frequency beam interaction circuit structure for a gyrotron as claimed in claim 2, wherein, ​ 4. The axially graded load high frequency beam interaction circuit structure for a gyrotron as claimed in claim 3, wherein, ​ 5. The axially graded load high frequency beam interaction circuit structure for a gyrotron as claimed in claim 1, wherein, ​

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