CN201893313U - Positive pole control electron gun applied in millimeter-wave travelling wave tube - Google Patents
Positive pole control electron gun applied in millimeter-wave travelling wave tube Download PDFInfo
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- CN201893313U CN201893313U CN2010205443450U CN201020544345U CN201893313U CN 201893313 U CN201893313 U CN 201893313U CN 2010205443450 U CN2010205443450 U CN 2010205443450U CN 201020544345 U CN201020544345 U CN 201020544345U CN 201893313 U CN201893313 U CN 201893313U
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Abstract
Disclosed is a positive pole control electron gun applied in a millimeter-wave travelling wave tube. The electron gun consists of a compound outer barrel, a negative pole, a focusing electrode, a positive pole, an inner heat shield and an outer heat shield. The negative pole is in a cylinder shape; the front end of the negative pole is arranged at the tail end of the focusing electrode; the rear end of the negative pole is connected with the inner heat shield; the focusing electrode is in a cylinder shape; the inner part of the focusing electrode near the negative pole is taper-shaped; the inner part of the focusing electrode near the positive pole is cylinder-shaped; steps are arranged outside the focusing electrode and connected with the inner heat shield and the outer heat shield; the positive pole is disc-shaped, is provided with a through hole in the middle and is connected with a positive pole support of the compound outer barrel; the inner heat shield is connected with the rear end of the negative pole and steps at the rear end of the focusing electrode; and the outer heat shield is connected with steps at the front end of the focusing electrode and a focusing pole support of the compound outer barrel. The electron gun has the advantages that the perveance of the electron gun is 0.22Mup; the total current launched by the negative pole is 60mA; the diameter of the launching surface of the negative pole is 3mm; the launching current density of the negative pole is 0.85A/cm<2>; the launching load of the negative pole is reduced; and the launching life of the negative pole is prolonged.
Description
[technical field]
The utility model belongs to microwave electron tube technical field, belongs to the design and the manufacturing field of travelling wave tube electron gun especially, is a kind of electron gun that is applied to the millimeter wave traveling wave tube anodic control specifically.
[background technology]
Travelling wave tube is widely used in national defence and national economy fields such as radar, communication, electronic countermeasures as a kind of microwave power amplifier.Electron gun is as producing the assembly that electronics is annotated, and for the slow wave system of travelling wave tube provides the electronics of certain electric current, definite shape and certain range to annotate, can satisfy the demand of radio-frequency field, is " heart " of travelling wave tube.
[summary of the invention]
It is 0.22 little Piao's electron gun that technical problem to be solved in the utility model is to provide a kind of perveance, anodic control, and emission current is not less than 60mA continuously, and electronics is annotated the smallest cross-sectional radius and is not more than 0.2mm.
The utility model solves the problems of the technologies described above by the following technical programs: a kind of electron gun that is applied to anodic control in the millimeter wave traveling wave tube, for cylindric, comprise compound urceolus, and also comprise negative electrode, focusing electrode, anode, internal heat shield and outer heat shielding;
Described compound urceolus comprises metal outer cylinder, insulating ceramics, focusing electrode supports, compensated loop, anode-supported, described focusing electrode supports and anode-supported all is cylindric, be arranged at rear end and front end in the metal outer cylinder respectively, and the inwall of described focusing electrode support and anode-supported and metal outer cylinder separates, the outer wall of focusing electrode support and anode-supported outwards forms the dividing plate of an annular respectively, the back edge portion fixed insulation pottery of the dividing plate that described focusing electrode supports, fixed insulation pottery between the back edge portion of the front edge portion of the dividing plate that focusing electrode supports and the dividing plate of anode-supported, fixed insulation pottery between the front edge portion of the dividing plate of anode-supported and the front inner wall of metal outer cylinder, fix described compensated loop on the front end outer wall of metal outer cylinder, the rear end fixed compensation ring of insulating ceramics;
Described negative electrode is cylindric, and front end is a cathode taps, is placed on the focusing electrode tail end, and the rear end of negative electrode is connected with internal heat shield; Focusing electrode is a cylindrical shape, focusing electrode inside to be shaped as zone near negative electrode be taper, be cylindric near the zone of anode, and focusing electrode has step outward, the outer step of focusing electrode is connected with outer heat shielding with internal heat shield respectively; Anode is discoid, has through hole in the middle of the disk, and anode is connected with the anode-supported of compound urceolus; Internal heat shield connects the rear end of negative electrode and the tail end step of focusing electrode, and outer heat shielding connects the front end step of focusing electrode and the focusing electrode of compound urceolus supports.
Adopt silver-bearing copper 28 scolder solderings to be welded between the metal outer cylinder of described compound urceolus, insulating ceramics, focusing electrode support, compensated loop, the anode-supported.
The utility model has the advantages that:
1, the electron gun perveance of this structure is 0.22 little Piao; The total current of cathode emission is 60mA, and cathode emission face diameter is 3mm, and cathode emission current density is 0.85A/cm2, has reduced the launch load of negative electrode, has increased the emission lifetime of negative electrode;
The electron beam least radius is 0.2mm, and compression ratio M is 56, has alleviated the load of negative electrode, reduces the influence that the cathode emission inhomogeneities makes electron beam laminarity variation; The while electron beam is easier to the coupling with magnetic system for a short time.
3, the range of electron beam is 13mm, and range is long and notes waist position electron beam divergence is mild, satisfies the design of slow wave structure and the coupling of magnetic system easily.
[description of drawings]
Fig. 1 is the electron gun schematic diagram of computed in software.
Fig. 2 is a structural representation of the present utility model;
Fig. 3 is the structural representation of the utility model electron gun urceolus.
[embodiment]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings, so that those skilled in the art can better understand the utility model and being implemented, but illustrated embodiment is not as to qualification of the present utility model.
Please consult Fig. 1 to Fig. 3 simultaneously, a kind of electron gun of using anodic control in the millimeter wave traveling wave tube for cylindric, comprises compound urceolus 1, also comprises negative electrode 2, focusing electrode 6, anode 5, internal heat shield 3 and outer heat shielding 4.
Described compound urceolus 1 comprises metal outer cylinder 11, insulating ceramics 12, focusing electrode support 13, insulating ceramics 14, insulating ceramics 15, compensated loop 16, anode-supported 17 and compensated loop 18.Described focusing electrode support 13 and anode-supported 17 all are cylindric rear end and the front end that is arranged at respectively in the metal outer cylinder 11, and described focusing electrode support 13 and anode-supported 17 separate with the inwall of metal outer cylinder 11, the outer wall of focusing electrode support 13 and anode-supported 17 outwards forms the dividing plate of an annular respectively, the back edge portion fixed insulation pottery 12 of the dividing plate of described focusing electrode support 13, fixed insulation pottery 14 between the back edge portion of the front edge portion of the dividing plate of focusing electrode support 13 and the dividing plate of anode-supported 17, fixed insulation pottery 14 between the front edge portion of the dividing plate of anode-supported 17 and the front inner wall of metal outer cylinder 11.Fix described compensated loop 15 on the front end outer wall of metal outer cylinder 11, the rear end fixed compensation ring 18 of insulating ceramics 12.The structure of this compound urceolus 1 guarantees that focusing electrode support 13 and 17 pairs of metal outer cylinders 11 of anode-supported have certain structure intensity and electrical insulation capability.
Described negative electrode 2 is cylindric, and front end is a cathode taps, is placed on focusing electrode 6 tail ends, and the rear end of negative electrode 2 is connected with internal heat shield 3; Focusing electrode 6 is a cylindrical shape, and the zone that is shaped as close negative electrode 2 of focusing electrode 6 inside is that the zone of taper, close anode 5 is cylindric, and outside the focusing electrode 6 step is arranged, and the outer step of focusing electrode 6 is connected with outer heat shielding 4 with internal heat shield 3 respectively; Anode 5 is discoid, has through hole in the middle of the disk, and anode 5 is connected with the anode-supported 17 of compound urceolus 1; Internal heat shield 3 connects the rear end of negative electrode 2 and the tail end step of focusing electrode 6, and negative electrode 2 and focusing electrode 6 are fixed together; Outer heat shielding 4 connects the front end step of focusing electrode 6 and the focusing electrode of compound urceolus 1 supports 13, and negative electrode 2, focusing electrode 6 are fixed on the compound urceolus 1.Negative electrode 2 materials are the tungsten metal of dipping barium salt, and focusing electrode 6 materials are the vacuum metling molybdenum, and anode 5 materials are for cutting down.
Concrete manufacturing step and parameter are:
1, utilizes computer software to simulate,, obtain the electron gun schematic diagram of calculating as shown in Figure 1 according to the known anode voltage 4000V and the total current 60mA of requirement.
2, choose the tungsten metallic cathode of negative electrode for the dipping barium salt, the negative electrode diameter is 3mm, and the radius of curvature of negative electrode is 7mm.
3, choose and focus on very vacuum metling molybdenum, being shaped as near the cathodic region of focusing electrode inside is taper, is cylindric near the anode region that the diameter of cylinder is 7.0mm, shown in Fig. 2 structural representation number in the figure 6.
4, choose anode material for cutting down, the anode hole diameter is 2.0mm, shown in Fig. 2 structural representation number in the figure 5.
5, make compound urceolus, shown in Fig. 3 outer tube structure schematic diagram, comprise shell, focusing electrode support, anode-supported and compensated loop, these part materials are and can cut down; Also comprise insulating ceramics, material is aluminium oxide 95 porcelain.Adopt the silver-bearing copper 28 scolder solderings compound urceolus that is welded between them.
6, shown in Fig. 2 structural representation focusing electrode 6 and negative electrode 2 usefulness internal heat shields 3 being fixed on one is fixed together outer heat shielding 4 and focusing electrode 6 then, the focusing electrode that outer heat shielding 4 is fixed on compound urceolus 1 supports, and anode 5 is fixed on the anode-supported of compound urceolus 1 again.
Electron gun is just assembled and has been finished like this.
Electron gun structure is under the condition of 6.3V at filament voltage, and heater current is after 1.2A keeps 3min, and anode voltage is that having obtained the negative electrode total current is 60mA under the continuous 4000V high pressure, and the electron beam least radius is 0.20mm, and the range of electron beam is 13mm.This electron gun may be used in the interior millimeter wave traveling wave tube of target aircraft.
Claims (2)
1. an electron gun that is applied to anodic control in the millimeter wave traveling wave tube is characterized in that: for cylindric, comprise compound urceolus, also comprise negative electrode, focusing electrode, anode, internal heat shield and outer heat shielding;
Described compound urceolus comprises metal outer cylinder, insulating ceramics, focusing electrode supports, compensated loop, anode-supported, described focusing electrode supports and anode-supported all is cylindric, be arranged at rear end and front end in the metal outer cylinder respectively, and the inwall of described focusing electrode support and anode-supported and metal outer cylinder separates, the outer wall of focusing electrode support and anode-supported outwards forms the dividing plate of an annular respectively, the back edge portion fixed insulation pottery of the dividing plate that described focusing electrode supports, fixed insulation pottery between the back edge portion of the front edge portion of the dividing plate that focusing electrode supports and the dividing plate of anode-supported, fixed insulation pottery between the front edge portion of the dividing plate of anode-supported and the front inner wall of metal outer cylinder, fix described compensated loop on the front end outer wall of metal outer cylinder, the rear end fixed compensation ring of insulating ceramics;
Described negative electrode is cylindric, and front end is a cathode taps, is placed on the focusing electrode tail end, and the rear end of negative electrode is connected with internal heat shield; Focusing electrode is a cylindrical shape, focusing electrode inside to be shaped as zone near negative electrode be taper, be cylindric near the zone of anode, and focusing electrode has step outward, the outer step of focusing electrode is connected with outer heat shielding with internal heat shield respectively; Anode is discoid, has through hole in the middle of the disk, and anode is connected with the anode-supported of compound urceolus; Internal heat shield connects the rear end of negative electrode and the tail end step of focusing electrode, and outer heat shielding connects the front end step of focusing electrode and the focusing electrode of compound urceolus supports.
2. a kind of electron gun that is applied to anodic control in the millimeter wave traveling wave tube as claimed in claim 1 is characterized in that: adopt silver-bearing copper 28 scolder solderings to be welded between the metal outer cylinder of described compound urceolus, insulating ceramics, focusing electrode support, compensated loop, the anode-supported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205443450U CN201893313U (en) | 2010-09-21 | 2010-09-21 | Positive pole control electron gun applied in millimeter-wave travelling wave tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205443450U CN201893313U (en) | 2010-09-21 | 2010-09-21 | Positive pole control electron gun applied in millimeter-wave travelling wave tube |
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| CN201893313U true CN201893313U (en) | 2011-07-06 |
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| CN2010205443450U Expired - Fee Related CN201893313U (en) | 2010-09-21 | 2010-09-21 | Positive pole control electron gun applied in millimeter-wave travelling wave tube |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522298A (en) * | 2011-12-30 | 2012-06-27 | 电子科技大学 | Oval sheet beam electron gun |
| CN103745900A (en) * | 2014-01-14 | 2014-04-23 | 电子科技大学 | Sheet electron beam generation cathode for vacuum electronic device |
| CN106950191A (en) * | 2017-02-28 | 2017-07-14 | 电子科技大学 | Supporting detection sample produces the experimental system of spectral characteristic in the case where electronics notes excitation |
| CN114464512A (en) * | 2022-02-10 | 2022-05-10 | 中国科学院空天信息创新研究院 | Emission device for emitting electrons, preparation method thereof and electron gun |
-
2010
- 2010-09-21 CN CN2010205443450U patent/CN201893313U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522298A (en) * | 2011-12-30 | 2012-06-27 | 电子科技大学 | Oval sheet beam electron gun |
| CN102522298B (en) * | 2011-12-30 | 2015-02-25 | 电子科技大学 | Oval sheet beam electron gun |
| CN103745900A (en) * | 2014-01-14 | 2014-04-23 | 电子科技大学 | Sheet electron beam generation cathode for vacuum electronic device |
| CN106950191A (en) * | 2017-02-28 | 2017-07-14 | 电子科技大学 | Supporting detection sample produces the experimental system of spectral characteristic in the case where electronics notes excitation |
| CN106950191B (en) * | 2017-02-28 | 2019-11-05 | 电子科技大学 | Mating test sample generates the experimental system of spectral characteristic under electronics note excitation |
| CN114464512A (en) * | 2022-02-10 | 2022-05-10 | 中国科学院空天信息创新研究院 | Emission device for emitting electrons, preparation method thereof and electron gun |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20150921 |
|
| EXPY | Termination of patent right or utility model |