S-band klystron collector

Abstract

The present invention provides an S-band klystron collector, comprising: a base, provided with an electron injection channel opening; a support tube unit, provided on the base, the tube wall comprising a first support tube wall and a second support tube wall sleeved by an annular magnetic assembly; a top cover unit, combined with the support tube unit to form a receiving space; a collector body assembly, corresponding to the electron injection channel opening, provided in the receiving space; and a water jacket unit, provided between the support tube and the collector body assembly, including an outer water jacket and an inner water jacket, capable of cooling the collector body assembly with cooling water. The above-mentioned klystron collector can effectively alleviate the technical problems of the S-band klystron collector in the prior art, such as unsatisfactory electron injection pass rate and difficulty in measurement, caused by structural design defects.

Description

Technical Field

[0001] The invention relates to the technical field of microwave electric vacuum devices, and in particular to an S-band (2-4 GHz electromagnetic wave frequency band) klystron collector. Background Art

[0002] As a microwave power amplifier, klystron has the advantages of high power, high gain, and high efficiency. It is widely used in particle accelerators, microwave weapons, meteorology and radar navigation, communications, television broadcasting and other fields. Klystron converts the kinetic energy of electron beam into microwave energy through the interaction between the gap high-frequency field and the electron beam based on the principle of velocity modulation. It consists of an electron gun, a high-frequency interaction section, a focusing system, an input-output system, a collector and other parts. The collector is an important component of the klystron. Its main function is to collect the electron beam after interaction and convert the energy of the electron beam into heat energy. In order to ensure sufficient interaction between the electron beam and the high-frequency field, it is usually required that the electron beam achieves a high pass rate in the interaction area.

[0003] However, due to the limitation of space charge force affecting electron beam fluctuation and laminarity, the electron beam pass rate of the current klystron collector is not ideal and difficult to measure. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to overcome the deficiencies of the prior art, the present disclosure provides an S-band klystron collector to alleviate technical problems in the prior art such as unsatisfactory electron injection pass rate and difficulty in measurement caused by structural design defects of the S-band klystron collector.

[0006] (II) Technical solution

[0007] The present invention provides an S-band klystron collector, comprising: a base, provided with an electron injection channel opening; a support tube unit, arranged on the base, the tube wall comprising a first support tube wall and a second support tube wall sleeved by an annular magnetic component; a top cover unit, combined with the support tube unit to form a accommodating space; a collector body component, arranged in the accommodating space corresponding to the electron injection channel opening; and a water jacket unit, arranged between the support tube and the collector body component, comprising an outer water jacket and an inner water jacket, capable of cooling the collector body component with cooling water.

[0008] According to an embodiment of the present disclosure, the magnetic assembly includes an isolation ceramic part and a first ceramic lining part and a second ceramic lining part welded to both ends of the isolation ceramic part, wherein: one end of the isolation ceramic part is welded to one end of the first ceramic lining part through a first welding edge, and the other end of the isolation ceramic part is welded to one end of the second ceramic lining part through a second welding edge; the other end of the first ceramic lining part is welded to the end face of the first support tube through a third welding edge; the other end of the second ceramic lining part is welded to the end face of the second support tube through a fourth welding edge.

[0009] According to an embodiment of the present disclosure, the preparation materials of the isolation ceramic part, the first lining ceramic part, and the second lining ceramic part are selected from: alumina ceramics, beryllium oxide ceramics, and boron nitride ceramics.

[0010] According to an embodiment of the present disclosure, the inner water jacket is disposed outside the collector assembly and forms a first gap for cooling water to flow through; the outer water jacket is disposed outside the inner water jacket and forms a second gap, and the end of the first gap is connected to the second gap.

[0011] According to an embodiment of the present disclosure, the top cover unit includes: a first port, connected to a first water nozzle, for receiving cooling water; a second port, one end of which is connected to the first port and the other end is connected to the water inlet of the inner water jacket, so that cooling water can be injected into the first gap and then flow from the first gap into the second gap; and a third port, connected to a second water nozzle, for discharging the cooling water from the second gap.

[0012] According to an embodiment of the present disclosure, the electron injection channel opening of the base is connected to a first conical opening for preventing electron injection from back-bombing the high-frequency interaction cavity of the klystron.

[0013] According to an embodiment of the present disclosure, the collecting pole assembly includes: a transition section, a main body section, and a top section; wherein: the inner surface of the transition section is provided with a second conical mouth structure corresponding to the first conical mouth, continuing the expansion shape of the wide mouth side of the first conical mouth; the outer surface of the main body section is provided with a plurality of grooves; the internal space of the top section is in a tapered shape.

[0014] According to an embodiment of the present disclosure, the distance between the end surface of the narrow side of the second tapered opening of the transition section and the end surface of the wide side of the first tapered opening is 1 mm.

[0015] According to an embodiment of the present disclosure, a recessed portion is disposed outside the tip of the top section, which can accommodate more cooling water flowing in through the second port.

[0016] According to an embodiment of the present disclosure, tantalum carbide is sintered on the inner surface of the collector assembly.

[0017] (III) Beneficial effects

[0018] It can be seen from the above technical solutions that the S-band klystron collector disclosed in the present invention has at least one or part of the following beneficial effects:

[0019] (1) The structure is simple and the assembly and welding process is simple;

[0020] (2) Since the collector assembly is insulated from the support tube unit, the collector current and tube current of the klystron tube can be measured separately, thereby calculating the electron beam passing rate;

[0021] (3) By sintering tantalum carbide on the inner surface of the collector assembly to absorb secondary electrons, the working stability and reliability of the klystron are improved;

[0022] (4) The collector assembly can also be applied to the collectors of klystrons in other bands, and can also be used as a step-down collector to improve the efficiency of the klystron. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the longitudinal cross-sectional structure of the collector of an S-band klystron according to an embodiment of the present disclosure;

[0024] Figure 2 is a schematic structural diagram of a collecting pole top cover unit according to an embodiment of the present disclosure;

[0025] Figure 3 is a schematic structural diagram of a collector assembly according to an embodiment of the present disclosure;

[0026] Figure 4 is a schematic structural diagram of an annular magnetic assembly according to an embodiment of the present disclosure;

[0027] Figure 5 Schematic diagram of the structure of the inner water jacket of the embodiment of the present disclosure.

[0028] [Description of symbols in the accompanying drawings]

[0029] 1- Base;

[0030] 11-Electron injection channel port;

[0031] 12- first conical opening;

[0032] 2-support cylinder unit;

[0033] 21-first supporting cylinder wall;

[0034] 22-second supporting cylinder wall;

[0035] 23- annular magnetic assembly;

[0036] 231-isolation porcelain part;

[0037] 232-first ceramic lining part;

[0038] 233- second lining porcelain part;

[0039] 2311-first welding edge;

[0040] 2312-second welding edge;

[0041] 2313-third welding edge;

[0042] 2314- fourth welding edge;

[0043] 3-Top cover unit;

[0044] 31-top cover;

[0045] 32-first port;

[0046] 33-second port;

[0047] 34- third port;

[0048] 35-First water spout;

[0049] 36- Second water spout;

[0050] 4-Collect polar body components;

[0051] 41-transition section;

[0052] 411- second conical opening;

[0053] 42-Body segment;

[0054] 43-top segment;

[0055] 5- Water jacket unit;

[0056] 51-outer water jacket;

[0057] 52-inner water jacket;

[0058] 521-Water inlet of the inner water jacket. DETAILED DESCRIPTION

[0059] The present invention provides an S-band klystron collector, wherein a collector body component is insulated and isolated from a support tube unit, and the collector current and tube body current of the klystron can be measured respectively, thereby calculating the electron injection pass rate, thereby realizing the monitoring of the electron injection pass rate. The inner surface of the collector body component is treated to suppress secondary electron emission and improve the working stability of the klystron.

[0060] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0061] In the embodiment of the present disclosure, an S-band klystron collector is provided, combined with Figures 1 to 5 As shown, the collector of the S-band klystron comprises: a base 1, a support tube unit 2 connected to the base 1, and a top cover unit 3 connected to the support tube unit 2. The base 1, the support tube unit 2 and the top cover unit 3 enclose a receiving space, and a water jacket unit 5 is arranged in the receiving space, including an outer water jacket 51 and an inner water jacket 52. The water jacket unit is a hollow structure, and a collector body assembly 4 is arranged in the cavity. The center lines of the base 1, the support tube unit 2, the top cover unit 3, the water jacket unit 5 and the collector body assembly 4 coincide.

[0062] The center line of the base 1 is provided with an electron injection channel opening 11 and a first conical opening 12 which penetrate the base 1 in sequence, for preventing electron injection from bombarding the high-frequency interaction cavity of the klystron. The base 1 can be made of stainless steel or other metal materials.

[0063] The support cylinder unit 2 is formed by the cylinder wall and has no end surface at both ends. The support cylinder unit 2 is arranged on one side of the first conical opening 12 of the base 1. The support cylinder unit 2 includes a first support cylinder wall 21, a second support cylinder wall 22, and an annular porcelain component 23 that sleeves the first support cylinder wall 21 and the second support cylinder wall 22. One end of the first support cylinder wall 21 is sleeved with the annular porcelain component 23, and the other end is tightly matched with one side of the first conical opening 12 of the base 1, and sealed and welded. Among them, the first support cylinder wall 21 and the second support cylinder wall 22 can be made of stainless steel or other metal materials.

[0064] In the present disclosure, Figure 1 and Figure 4 As shown, the annular magnetic assembly 23 includes an isolation ceramic part 231 and a first ceramic lining part 232 and a second ceramic lining part 233 welded to both ends of the isolation ceramic part 231. The annular magnetic assembly 23 also includes a first welding edge 2311, a second welding edge 2312, a third welding edge 2313 and a fourth welding edge 2314. One end of the isolation ceramic part 231 is welded to one end of the first ceramic lining part 232 through the first welding edge 2311, and the other end of the isolation ceramic part 231 is welded to one end of the second ceramic lining part 233 through the second welding edge 2312. The other end of the first ceramic lining part 232 is welded to the end face of the first support tube 21 through the third welding edge 2313, and the other end of the second ceramic lining part 233 is welded to the end face of the second support tube 22 through the fourth welding edge 2314. The welding can be argon arc sealing welding or other welding methods. The materials of the isolation ceramic part 231, the first ceramic lining part 232, and the second ceramic lining part 233 can be selected from materials with electrical insulation properties such as alumina ceramics, beryllium oxide ceramics, and boron nitride ceramics. The first welding edge 2311, the second welding edge 2312, the third welding edge 2313, and the fourth welding edge 2314 can be made of stainless steel or other metal materials.

[0065] In the present disclosure, Figure 1 and Figure 2 As shown, the top cover unit 3 includes a top cover 31 and a water jacket seat that is tightly matched with the top cover 31 and seal-welded. The top cover 31 is provided with a second port 33 and a third port 34 of through holes, wherein the second port 33 is arranged on the center line of the top cover unit 3. One end of the top cover 31 is a stepped boss structure, including at least two stepped bosses with different outer circumferential dimensions. The stepped boss with the largest outer circumferential dimension among the stepped bosses is tightly matched with the end of the second support cylinder wall 22 away from the annular magnetic assembly 23, and is seal-welded, for example, by brazing. The other end of the top cover 31 is a stepped groove structure, including at least two stepped grooves with different outer circumferential dimensions, and the stepped groove with the largest inner circumferential dimension among the stepped grooves is tightly matched with the water jacket seat, and is seal-welded. A first water nozzle 35 is connected to one side of the first port 32 for receiving cooling water; one end of the second port 33 is connected to the first port 32 through the internal space, and the other end is connected to the water inlet 521 of the inner water jacket 52, so that the cooling water flowing in from the first port 32 can be injected into the first gap. In this process, the cooling water flows through the surface of the collector assembly, which can dissipate the heat of the collector assembly, and then the cooling water flows from the first gap through the gap between the inner water jacket 52 and the base 1 into the second gap; a second water nozzle 36 is connected to one side of the third port for discharging the cooling water after flowing through the first gap and the second gap.

[0066] In the present disclosure, Figure 1 , Figure 3 , Figure 5 As shown, a water jacket unit 5 is provided in the accommodation space formed by the base 1, the support cylinder unit 2 and the top cover unit 3, including an outer water jacket 51 and an inner water jacket 52. The outer water jacket 51 is formed by the cylinder wall and has no end faces at both ends. One end of the outer water jacket 51 is tightly matched with the stepped boss with the smallest outer circumference size among the stepped bosses of the top cover 31, and is sealed and welded. The other end of the outer water jacket 51 is connected to the collector body assembly 4. The inner water jacket 52 is a hollow sleeve with one conical end and the other cylindrical end and no end faces at both ends, wherein the cylindrical end of the inner water jacket 52 can be made of stainless steel or other metal materials. The end face of the tapered end of the inner water jacket 52 is provided with a water inlet 521 of the inner water jacket, which is tightly matched with the second port 33 and is sealed and welded.

[0067] In the present disclosure, Figure 1 and Figure 3As shown, the inner cavity of the water jacket unit 5 is provided with a collector electrode assembly 4, which is a hollow structure, including a transition section 41, a body section 42 and a top section 43, which are tightly matched and sealed and welded in sequence. Tantalum carbide is sintered on the inner surface of the collector electrode assembly 4, which can absorb secondary electrons when in use, thereby improving the working stability and reliability of the klystron. Among them, a second tapered mouth 411 corresponding to the first tapered mouth 12 of the base 1 is provided on the center line of the inner surface of the transition section 41, and the second tapered mouth 411 continues the expansion form of the wide mouth side of the first tapered mouth 12. Among them, the end face of the narrow mouth side of the second tapered mouth 411 is set at a certain distance from the end face of the wide mouth side of the first tapered mouth 12, and the distance is at least 1mm. The outer end face of the wide mouth side of the second tapered mouth 411 of the transition section 41 is tightly matched with the outer water jacket 51, and is sealed and welded. The body section 42 and the top section 43 are provided in the space enclosed by the transition section 41 and the inner water jacket 52. The outer surface of the body section 42 is provided with evenly arranged grooves, and the number of the grooves may be 60. A recessed portion is provided outside the tip of the top section 43 to accommodate more cooling water, and the internal space of the top section 43 is in a tapered shape. The transition section 41, the body section 42 and the top section 43 of the collector assembly 4 can all be made of oxygen-free copper material.

[0068] The end surface of the cylindrical end of the inner water jacket 52 is set at a certain distance from the transition section 41 of the collector assembly 4, and the distance is at least 10 mm. The inner water jacket 52 is sleeved outside the collector assembly 4 and forms a first gap for cooling water to flow through, and the outer water jacket 51 is sleeved outside the inner water jacket 52 to form a second gap, and the end of the first gap is connected to the second gap.

[0069] The first port 32 is connected to a first water nozzle 35 for receiving cooling water. The second port 33 has one end connected to the first port 32 and the other end connected to the water inlet 521 of the inner water jacket, so that cooling water can be injected into the first gap and then flow from the first gap into the second gap. The third port 34 is connected to a second water nozzle 36 for discharging cooling water from the second gap, wherein the connection of the water nozzle can be achieved by brazing or other sealing connection methods.

[0070] So far, the embodiments of the present disclosure have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element and method are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0071] According to the above description, those skilled in the art should have a clear understanding of the S-band klystron collector disclosed in the present invention.

[0072] In summary, the present disclosure provides an S-band klystron collector, which has a simple structure and a simple assembly and welding process. Since the collector body assembly is insulated and isolated from the support tube unit, the klystron collector current and the tube body current can be measured separately, thereby calculating the electron injection pass rate. Tantalum carbide is sintered on the inner surface of the collector body assembly to absorb secondary electrons, thereby improving the working stability and reliability of the klystron. The collector body assembly structure can also be promoted and applied to klystron collectors of other bands, and can also be used as a step-down collector to improve the efficiency of the klystron.

[0073] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure. In addition, the shapes and sizes of the components in the drawings do not reflect the actual size and proportion, but only illustrate the contents of the embodiments of the present disclosure.

[0074] The ordinal numbers used in the specification and claims, such as "first", "second", "third", etc., to modify the corresponding elements, do not themselves mean that the elements have any ordinal numbers, nor do they represent the order of one element and another element, or the order in the manufacturing method. The use of these ordinal numbers is only used to clearly distinguish a component with a certain name from another component with the same name.

[0075] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above description is only a specific embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. An S-band klystron collector, include: The base is provided with an electronic injection channel opening; A support cylinder unit is arranged on the base, and the cylinder wall includes a first support cylinder wall and a second support cylinder wall which are sleeved by an annular magnetic assembly, wherein the magnetic assembly includes an isolation porcelain part and a first lining porcelain part and a second lining porcelain part welded at both ends of the isolation porcelain part, one end of the isolation porcelain part is welded to one end of the first lining porcelain part through a first welding edge, and the other end of the isolation porcelain part is welded to one end of the second lining porcelain part through a second welding edge; the other end of the first lining porcelain part is welded to the end face of the first support cylinder through a third welding edge; the other end of the second lining porcelain part is welded to the end face of the second support cylinder through a fourth welding edge; A top cover unit, which is combined with the support cylinder unit to form a receiving space; A collector assembly is disposed in the accommodation space corresponding to the electron injection channel opening; and A water jacket unit is arranged between the support tube and the collector body assembly, comprising an outer water jacket and an inner water jacket, capable of cooling the collector body assembly with cooling water, wherein the inner water jacket is sleeved on the outside of the collector body assembly and forms a first gap for cooling water to flow through; the outer water jacket is sleeved on the outside of the inner water jacket to form a second gap, and the end of the first gap is connected to the second gap; the top cover unit comprises: a first port, connected to a first water nozzle, for receiving the cooling water; a second port, one end of which is connected to the first port and the other end is connected to the water inlet of the inner water jacket, capable of injecting the cooling water into the first gap and then flowing from the first gap into the second gap; and a third port, connected to a second water nozzle, for discharging the cooling water from the second gap.

2. According to the S-band klystron collector of claim 1, the isolation ceramic part, the first ceramic lining part, and the second ceramic lining part are made of materials selected from the group consisting of: alumina ceramics, beryllium oxide ceramics, and boron nitride ceramics.

3. The S-band klystron collector according to claim 1, wherein the electron injection channel opening of the base is connected to a first conical opening for preventing electron injection from bombarding the high-frequency interaction cavity of the klystron.

4. The S-band klystron collector according to claim 1, wherein the collector assembly include: a transition section, a body section, and a top section; wherein: The inner surface of the transition section is provided with a second tapered opening structure corresponding to the first tapered opening, continuing the expansion shape of the wide opening side of the first tapered opening; The outer surface of the body section is provided with a plurality of grooves; The inner space of the top section is in a gradually shrinking shape. 5 . The S-band klystron collector according to claim 4 , wherein the distance between the end surface of the narrow side of the second conical opening of the transition section and the end surface of the wide side of the first conical opening is 1 mm.

6. The S-band klystron collector according to claim 4, wherein a recessed portion is disposed outside the tip of the top section to accommodate more cooling water flowing in through the second port.

7. The S-band klystron collector according to claim 4, wherein the inner surface of the collector body assembly is sintered with tantalum carbide.

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