CN102945781B - Dual-mode multi-beam electron gun for dual-mode traveling wave tube and control method thereof - Google Patents
Dual-mode multi-beam electron gun for dual-mode traveling wave tube and control method thereof Download PDFInfo
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Abstract
The invention discloses a dual-mode multi-beam electron gun for a dual-mode traveling wave tube and a control method thereof, wherein the dual-mode multi-beam electron gun comprises a cathode, a shadow grid, an inner grid, an outer grid and an anode which are sequentially arranged; the cathode comprises a cathode molybdenum tube, the cathode molybdenum tube is internally divided into two parts along the axial direction of the cathode molybdenum tube, the two parts are separated by insulating ceramics, a cathode sponge body is arranged in one part, a filament encapsulating insulator is arranged in the other part, and a filament is arranged in the filament encapsulating insulator; the end face of the cathode molybdenum cylinder is provided with a plurality of holes, the inner grid electrode controls electron beams in a part of the holes, and the outer grid electrode controls electron beams in the other part of the holes, so that dual-mode operation is realized. The dual-mode multi-beam electron gun for the dual-mode traveling wave tube and the control method thereof with the special structure can provide two working states of high and low modes, control voltages are consistent, and the same magnetic field can be used for focusing electron beams of the two modes.
Description
Technical field
The present invention relates to microwave vacuum devices field, especially relate to a kind of double mode Multi-Beam electron Gun for dual mode traveling wave tube and control method thereof.
Background technology
In microwave vacuum devices field, travelling wave tube is most widely used device.Wherein dual mode traveling wave tube can be operated in height two kinds of mode states.High workload matrix cathode peak current is large, and pulse output power is high, works than little, and the radar as major function uses; Low mode of operation peak cathode current is little, and pulse output power is little, and work, than large, can use as functions such as guidance, interference, use a kind of travelling wave tube to complete two kinds of functions.
Dual mode traveling wave tube requires that the average power of two kinds of mode of operations is suitable with average cathode current, can use same group of Power supply, to power supply occasion in short supply as airborne field has the meaning of particular importance.One of difficult point of dual mode traveling wave tube design is the design of bimodulus electron gun.Bimodulus electron gun needs to provide high low mode two kinds of operating states, and require that control voltage is consistent, namely cut-ff voltage and operating voltage do not change when patten transformation, anode voltage constant, conversion is convenient, can realize through engineering approaches, and focusing magnetic field can focus on height two kinds of patterns simultaneously.But, but do not meet the bimodulus electron gun of above-mentioned requirements in prior art completely, limit the development of technology.
Summary of the invention
Technical problem to be solved by this invention provides a kind of double mode Multi-Beam electron Gun for dual mode traveling wave tube and control method thereof for problems of the prior art, its objective is and can provide high low mode two kinds of operating states, and control voltage is consistent, namely cut-ff voltage and operating voltage do not change when patten transformation, anode voltage constant, conversion is convenient, can realize through engineering approaches, same magnetic field can be used the Electron Beam Focusing of two kinds of patterns.
To be this kind comprise for the double mode Multi-Beam electron Gun of dual mode traveling wave tube the negative electrode, shadow grid, inner grid, outer grid and the anode that are arranged in order to technical scheme of the present invention, and inner grid is sleeved on the boss of outer grid; Described negative electrode comprises negative electrode molybdenum cylinder, negative electrode molybdenum cylinder is interior and axis direction along negative electrode molybdenum cylinder is divided into two parts, is separated, be provided with negative electrode cavernous body in a part between two parts by insulating ceramics, filament embedding insulator is installed in another part, and is provided with filament in filament embedding insulator; The end face of negative electrode molybdenum cylinder is provided with several holes, and inner grid controls the electron beam wherein in a part of hole, and outer grid controls the electron beam in remainder hole, realizes working in double modes.
The diameter in the hole on described negative electrode molybdenum cylinder end face sets according to the size of double mode electric current, and the quantity in hole sets according to adjustment current ratio.
As a kind of embodiment, hole on the end face of described negative electrode molybdenum cylinder is preferably 19, and the diameter in 19 holes is identical, inner grid is provided with upper outsidely with the end face of negative electrode molybdenum cylinder places hole corresponding to 12 holes, and the electron beam controlled in peripheral 12 holes, outer grid is provided with the hole corresponding with 19 holes on the end face of negative electrode molybdenum cylinder, and control centre locates the electron beam in 7 holes, and height mode current ratio is 19:7.
Described shadow grid, inner grid and outer grid are one, and shadow grid, inner grid and outer grid are planar structure.
The current potential of described shadow grid is consistent with negative electrode, and inner grid is all consistent with height mode operating voltage with the cut-ff voltage of outer grid.
The generating positive and negative voltage difference of described inner grid and outer grid is all less than 800V.
A control method for above-mentioned double mode Multi-Beam electron Gun, according to the size of double mode electric current, arranges the aperture in several holes on negative electrode molybdenum cylinder, and the size in aperture can be all consistent; Also can finely tune the aperture of wherein partial hole, the aperture of noting with other is different, reaches the object regulating height mode current ratio; The quantity in hole sets according to adjustment current ratio.
As a kind of concrete execution mode, the hole on the end face of described negative electrode molybdenum cylinder is preferably 19, and the diameter in 19 holes is identical, and inner grid controls peripheral 12 note electron beams, outer grid control centre 7 note electron beam;
1) when inner grid and outer grid add negative stopping potential simultaneously, 19 note beam suppressions, negative electrode is emission current not;
2), when inner grid adds negative stopping potential, when outer grid adds positive operating potential, note cathode emission electron beam in center 7 works, and peripheral 12 note beam suppressions, are operated in low mode state;
3) when inner grid and outer grid increase operating potential simultaneously, 19 note electron beams are launched simultaneously, and electron gun is operated in height mode state.
This kind with said structure has the following advantages for the double mode Multi-Beam electron Gun of dual mode traveling wave tube and control method thereof:
1. this kind uses 19 note planar cathodes for the double mode Multi-Beam electron Gun of dual mode traveling wave tube, negative electrode is as a whole, one adds heater, simplify technique, a molybdenum barrel part processes 19 holes, uses general immersion film-coated cathode technique to make, form 19 note negative electrodes, launching track, the shape of 19 note electron beams are consistent, and emission current is consistent.During height patten transformation, the track of center 7 note electron beam, shape do not change, and focusing magnetic field does not need when height patten transformation to change.
2. this kind arranges negative electrode aperture for the double mode Multi-Beam electron Gun of dual mode traveling wave tube according to the size of double mode electric current, also can finely tune wherein part aperture, and the aperture of noting with other is different, reaches the object regulating height mode current ratio; 19 note electron beams can not certainly be used, use other note number, and control different electron beams respectively, regulate current ratio.
3. this kind is simple for the double mode Multi-Beam electron Gun process structure of dual mode traveling wave tube, engineer applied is easy to realize, negative electrode, shadow grid, inner grid, outer grid are planar structure, be easy to processing, and negative electrode, shadow grid, inner grid, outer grid is by Design Orientation hole and suitable frock, ensure mutual position relationship, ensure assembly precision; Shadow grid, inner grid, outer grid generally adopt high temperature refractory such as molybdenum to make, and intensity is good, and radiating condition is good, and temperature is low, and reliability is high.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is structural representation of the present invention.
Fig. 2 is the left view of structure shown in Fig. 1.
Fig. 3 is the structural representation of negative electrode in the present invention.
Fig. 4 is the left view of structure shown in Fig. 3.
Fig. 5 is the structural representation of shadow grid in the present invention.
Fig. 6 is the left view of structure shown in Fig. 5.
Fig. 7 is the structural representation of inner grid in the present invention.
Fig. 8 is the left view of structure shown in Fig. 7.
Fig. 9 is the structural representation of the present invention China and foreign countries grid.
Figure 10 is the right view of structure shown in Fig. 9.
Figure 11 is the structural representation of Anodic of the present invention.
Figure 12 is the left view of structure shown in Figure 11.
In Fig. 1-12,1: negative electrode molybdenum cylinder; 2: negative electrode cavernous body; 3: filament embedding insulator; 4: insulating ceramics; 5: filament; 6: negative electrode; 7: shadow grid: 8: inner grid; 9: outer grid; 10: anode.
Embodiment
Combined from structure shown in Fig. 1-12, this kind comprises for the double mode Multi-Beam electron Gun of dual mode traveling wave tube the negative electrode 6, shadow grid 7, inner grid 8, outer grid 9 and the anode 10 that are arranged in order; Negative electrode 6 comprises negative electrode molybdenum cylinder 1, negative electrode molybdenum cylinder 1 is interior and axis direction along negative electrode molybdenum cylinder 1 is divided into two parts, separated by insulating ceramics 4 between two parts, negative electrode cavernous body 2 is installed in a part, filament embedding insulator 3 is installed in another part, and is provided with filament 5 in filament embedding insulator 3; The end face of negative electrode molybdenum cylinder 1 is provided with several holes, and inner grid 8 controls the electron beam in wherein a part of hole, and outer grid 9 controls the electron beam in remainder hole, realizes working in double modes.
The diameter in the hole on negative electrode molybdenum cylinder 1 end face sets according to the size of double mode electric current, and the quantity in hole sets according to adjustment current ratio.
As a specific embodiment of the present invention, hole on the end face of negative electrode molybdenum cylinder 1 is preferably 19, and the diameter in 19 holes is identical, inner grid 8 is provided with upper outsidely with the end face of negative electrode molybdenum cylinder 1 places hole corresponding to 12 holes, and the electron beam controlled in peripheral 12 holes, outer grid 9 is provided with the hole corresponding with 19 holes on the end face of negative electrode molybdenum cylinder 1, and control centre locates the electron beam in 7 holes, height mode current ratio is 19:7, general immersion film-coated cathode technique is used to make, form 19 note negative electrodes, the launching track of 19 note electron beams, shape is consistent, emission current is consistent.During height patten transformation, the track of center 7 note electron beam, shape do not change, and focusing magnetic field does not need when height patten transformation to change.
Arrange negative electrode aperture according to the size of double mode electric current, also can finely tune wherein part aperture, the aperture of noting with other is different, reaches the object regulating height mode current ratio; 19 note electron beams can not certainly be used, use other note number, and control different electron beams respectively, regulate current ratio.
Shadow grid 7, inner grid 8 and outer grid 9 are one, and shadow grid 7, inner grid 8 and outer grid 9 are planar structure, be easy to processing, and negative electrode 6, shadow grid 7, inner grid 8, outer grid 9 are by Design Orientation hole and suitable frock, ensure mutual position relationship, ensure assembly precision; Shadow grid 7, inner grid 8, outer grid 9 generally adopt high temperature refractory such as molybdenum to make, and intensity is good, and radiating condition is good, and temperature is low, and reliability is high.
The current potential of shadow grid 7 is consistent with negative electrode 6, and inner grid 8 is all consistent with height mode operating voltage with the cut-ff voltage of outer grid 9, and the generating positive and negative voltage difference of inner grid 8 and outer grid 9 is all less than 800V.
The control method of this kind of double mode Multi-Beam electron Gun is specially: according to the size of double mode electric current, arranges the aperture in several holes on negative electrode molybdenum cylinder 1, and the size in aperture can be all consistent; Also can finely tune the aperture of wherein partial hole, the aperture of noting with other is different, reaches the object regulating height mode current ratio; The quantity in hole sets according to adjustment current ratio.
Hole on the end face of negative electrode molybdenum cylinder 1 is preferably 19, and the diameter in 19 holes is identical, and inner grid 8 controls peripheral 12 note electron beams, outer grid 9 control centre 7 note electron beam;
1) when inner grid 8 and outer grid 9 add negative stopping potential simultaneously, 19 note beam suppressions, negative electrode 6 not emission current;
2), when inner grid 8 adds negative stopping potential, when outer grid 9 adds positive operating potential, note cathode emission electron beam in center 7 works, and peripheral 12 note beam suppressions, are operated in low mode state;
3) when inner grid 8 and outer grid 9 increase operating potential simultaneously, 19 note electron beams are launched simultaneously, and electron gun is operated in height mode state.
Claims (6)
1. for a double mode Multi-Beam electron Gun for dual mode traveling wave tube, it is characterized in that: described double mode Multi-Beam electron Gun comprises the negative electrode (6), shadow grid (7), inner grid (8), outer grid (9) and the anode (10) that are arranged in order; Described negative electrode (6) comprises negative electrode molybdenum cylinder (1), negative electrode molybdenum cylinder (1) is interior and axis direction along negative electrode molybdenum cylinder (1) is divided into two parts, separated by insulating ceramics (4) between two parts, negative electrode cavernous body (2) is installed in a part, filament embedding insulator (3) is installed in another part, and is provided with filament (5) in filament embedding insulator (3); The end face of negative electrode molybdenum cylinder (1) is provided with several holes, and inner grid (8) controls the electron beam wherein in a part of hole, and outer grid (9) controls the electron beam in remainder hole, realizes working in double modes;
The diameter in the hole on described negative electrode molybdenum cylinder (1) end face sets according to the size of double mode electric current, and the quantity in hole sets according to adjustment current ratio;
Hole on the end face of described negative electrode molybdenum cylinder (1) is preferably 19, and the diameter in 19 holes is identical, inner grid (8) is provided with upper outsidely with the end face of negative electrode molybdenum cylinder (1) places hole corresponding to 12 holes, and the electron beam controlled in peripheral 12 holes, outer grid (9) is provided with the hole corresponding with 19 holes on the end face of negative electrode molybdenum cylinder (1), and control centre locates the electron beam in 7 holes, height mode current ratio is 19:7.
2. a kind of double mode Multi-Beam electron Gun for dual mode traveling wave tube according to claim 1, it is characterized in that: described shadow grid (7), inner grid (8) and outer grid (9) are one, and shadow grid (7), inner grid (8) and outer grid (9) are planar structure.
3. a kind of double mode Multi-Beam electron Gun for dual mode traveling wave tube according to claim 2, it is characterized in that: the current potential of described shadow grid (7) is consistent with negative electrode (6), inner grid (8) is all consistent with height mode operating voltage with the cut-ff voltage of outer grid (9).
4. a kind of double mode Multi-Beam electron Gun for dual mode traveling wave tube according to claim 3, is characterized in that: described inner grid (8) and the generating positive and negative voltage difference of outer grid (9) are all less than 800V.
5. the control method of the double mode Multi-Beam electron Gun described in any one of a claim 1-4 claim, it is characterized in that: according to the size of double mode electric current, the aperture in fine setting negative electrode molybdenum cylinder (1) upper part hole, the aperture of noting with other is different, reaches the object regulating height mode current ratio; The quantity in hole sets according to adjustment current ratio.
6. the control method of double mode Multi-Beam electron Gun according to claim 5, it is characterized in that: the hole on the end face of described negative electrode molybdenum cylinder (1) is preferably 19, and the diameter in 19 holes is identical, inner grid (8) is provided with upper outsidely with the end face of negative electrode molybdenum cylinder (1) places hole corresponding to 12 holes, and the electron beam controlled in peripheral 12 holes, outer grid (9) is provided with the hole corresponding with 19 holes on the end face of negative electrode molybdenum cylinder (1), and control centre locates the electron beam in 7 holes;
1) when inner grid (8) and outer grid (9) add negative stopping potential simultaneously, 19 note beam suppressions, negative electrode (6) not emission current;
2), when inner grid (8) adds negative stopping potential, when outer grid (9) adds positive operating potential, note cathode emission electron beam in center 7 works, and peripheral 12 note beam suppressions, are operated in low mode state;
3) when inner grid (8) and outer grid (9) increase operating potential simultaneously, 19 note electron beams are launched simultaneously, and electron gun is operated in height mode state.
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| CN201210393868.3A CN102945781B (en) | 2012-10-17 | 2012-10-17 | Dual-mode multi-beam electron gun for dual-mode traveling wave tube and control method thereof |
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| CN102945781B true CN102945781B (en) | 2015-08-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103311075B (en) * | 2013-06-21 | 2016-01-27 | 安徽华东光电技术研究所 | Dual-mode traveling wave tube slow wave structure |
| CN111326378B (en) * | 2018-12-13 | 2021-07-30 | 陕西利友百辉科技发展有限公司 | Multi-floating grid cathode structure, electron gun, electron accelerator and irradiation device |
| CN111328176B (en) * | 2018-12-13 | 2021-12-17 | 陕西利友百辉科技发展有限公司 | Suspended grid cathode structure, electron gun, electron accelerator and irradiation device |
| CN109686638A (en) * | 2018-12-20 | 2019-04-26 | 安徽华东光电技术研究所有限公司 | A kind of electron emission source |
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| US4593230A (en) * | 1982-03-29 | 1986-06-03 | Litton Systems, Inc. | Dual-mode electron gun |
| CN101335166A (en) * | 2007-06-27 | 2008-12-31 | 中国科学院电子学研究所 | Cathode three-element alloy film and method for preparing film covered dipping diffusion cathode |
| CN201859827U (en) * | 2010-11-11 | 2011-06-08 | 中国电子科技集团公司第十二研究所 | Structure of electron gun of floated grid-controlled multiple-beam klystron |
| CN201893312U (en) * | 2010-12-03 | 2011-07-06 | 安徽华东光电技术研究所 | Multi-injection cathode assembly |
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| US4593230A (en) * | 1982-03-29 | 1986-06-03 | Litton Systems, Inc. | Dual-mode electron gun |
| US4553064A (en) * | 1983-08-30 | 1985-11-12 | Hughes Aircraft Company | Dual-mode electron gun with improved shadow grid arrangement |
| CN101335166A (en) * | 2007-06-27 | 2008-12-31 | 中国科学院电子学研究所 | Cathode three-element alloy film and method for preparing film covered dipping diffusion cathode |
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