CN105762047A - Space traveling wave tube, collector thereof and preparation method of the connector - Google Patents
Space traveling wave tube, collector thereof and preparation method of the connector Download PDFInfo
- Publication number
- CN105762047A CN105762047A CN201610232328.5A CN201610232328A CN105762047A CN 105762047 A CN105762047 A CN 105762047A CN 201610232328 A CN201610232328 A CN 201610232328A CN 105762047 A CN105762047 A CN 105762047A
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- collector
- wave tube
- sheet metal
- travelling wave
- aperture
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 46
- 238000003466 welding Methods 0.000 claims description 21
- 230000004927 fusion Effects 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010894 electron beam technology Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007872 degassing Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Particle Accelerators (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a controller of a space traveling wave tube, wherein a small hole is arranged on the bottom of the collector, and the small hole is hermetically covered by a metal sheet, which is equal to arrange a window. The invention also comprises a preparation of the collector and a space traveling wave tube comprising the collector. The window of the collector can leak gas after electron bombardment for a period of time, the residual gas in the space traveling wave tube enters space with 1*10<-8> Pa vacuum degree through an opened window; so that limiting vacuum of the space traveling wave tube is greatly improved, the service live of parts can be further greatly prolonged, and enormous economic benefits are produced. According to the invention, the tube, collector and method have advantages of simpleness, easy operation, low cost and high economic value.
Description
Technical field
The present invention relates to long-life space travelling wave tube technology, particularly relate to a kind of space travelling wave tube, and its collector, further relate to the preparation method of this travelling-wave tubes and collector.
Background technology
Long-life space travelling wave tube is widely used in the aspects such as radar, satellite communication, global location, the function of its uniqueness and superior performance, particularly in the case of high-power and high band, is that other devices are not caned substituted.
For long-life space travelling wave tube, in view of its structure, process characteristic and general work principle, after eliminating initial failure, device parameter performance tends towards stability, in addition vacuum device is to the environmental factor such as temperature, radiation insensitive, and the life-span just becomes the important indicator characterizing its reliability level.The factor affecting the electron tube life-span is a lot, and its failure mode there are differences because pipe kind is different from distribution.In complicated various factors, vacuum in emission of cathode, Electronic beam focusing, power output, noise level and pipe is had an impact by residual gas the most simultaneously, and precision component is by the damage that can not repair in making pipe, and this part can cause the premature breakdown of pipe.Therefore research meets the ultrahigh vacuum acquisition technology of high power, high efficiency, high-frequency, broadband space travelling wave tube, for promoting the development tool of the technology such as satellite communication to be of great significance.
Long-life space travelling wave tube generally uses the method for bakeout degassing to reduce gas efficiency." baking " in vacuum refers in a certain stage bled, and vacuum system is heated up, is allowed to the most again drop to the process of environment temperature.The main purpose of baking is that the gas making absorption desorbs from heated surface, and its desorption rate to be far longer than desorption rate at ambient temperature, to the gas desorbed, gets rid of from system with vavuum pump.The benefit of baking is: can reach relatively low pressure in the pumpdown time of regulation；Or for reaching the pressure of regulation, total pumpdown time used is shorter.In the entire system, declining of the gross pressure that the system that caused by toasting is final is usually the most small (the most slightly rising), but just from the point of view of the essence of baking, it is to make the adsorbed gas that combination can be relatively low be removed from the surface of research selectively so that being become by the position of degassing in vacuum atmosphere compares " the freshest ".
The many metals of research discovery are in a vacuum after the long-time heating of 1000 DEG C, and oxide-film is still left on surface.Such as must be 10-4The vacuum of Pa is heated to 1760 DEG C Mo and lasts for hours the gas of ability emptying Mo dissolving metal.Therefore the gas of metal parts dissolving and the oxide-film on surface in the long-life space travelling wave tube of baking (400-600 DEG C) degasification is used to be very difficult to except clean.Under the bombardment of electron beam, metal parts (especially collector in long-life space travelling wave tube, because it have received the electronics of more than 90%) substantial amounts of gas can be released, therefore long-life space travelling wave tube is in order to obtain and keep optimum performance, ultrahigh vacuum required for long-life and high reliability, have to pass through the most seasoned (500-1000 hour), nonetheless, due to the restriction for long-life space travelling wave tube seasoned titanium pump volume, their pumping speed typically small (the most a few liter/second), therefore the end vacuum after long-life space travelling wave tube is seasoned also is difficult to reach the highest level, vacuum is generally 5 × 10-6About Pa.
Summary of the invention
(1) to solve the technical problem that
In view of above-mentioned technical problem, it is an object of the invention to provide a kind of space travelling wave tube and preparation method thereof.
(2) technical scheme
For achieving the above object, according to an aspect of the present invention, it is provided that the collector of a kind of space travelling wave tube, it is characterised in that:
The bottom of collector offers an aperture；
Airtight covering one sheet metal on described aperture.
A specific embodiments according to the present invention, described aperture covers a sheet metal by welding or laser fusion welding mode.
A specific embodiments according to the present invention, described sheet metal is the stainless steel material containing chromium.
A specific embodiments according to the present invention, the thickness of described sheet metal be set as beam bombardment after 2000-3000 hour leak rate higher than 1 × 10-8Pa.m3/s。
A specific embodiments according to the present invention, between aperture and the sheet metal of covering, leak rate is less than 1 × 10-9Pa.m3/s。
According to an aspect of the present invention, it is provided that the preparation method of the collector of a kind of space travelling wave tube, including step:
(1) aperture is offered in the bottom at collector；
(2) on described aperture, cover a sheet metal, make to be formed between sheet metal and aperture airtight.
A specific embodiments according to the present invention, in the preparation method of above-mentioned space travelling wave tube collector, the mode covered described in step (2) is welding or laser fusion welding.
According to an aspect of the present invention, it is provided that the preparation method of a kind of space travelling wave tube, including step:
(1) aperture is offered in the bottom at the collector of travelling-wave tubes；
(2) on described aperture, cover a sheet metal, make to be formed between sheet metal and aperture confined space；
(3) collector that will be covered with sheet metal welds with slow-wave component, and slow-wave component welds with electron gun, makes sheet metal described in described gun alignment after welding.
A specific embodiments according to the present invention, in the preparation method of above-mentioned space travelling wave tube, the mode of described covering is welding or laser fusion welding.
According to an aspect of the present invention, it is provided that a kind of space travelling wave tube, including the collector of the space travelling wave tube described in claim 1-5 any one.
(3) beneficial effect
According to technique scheme it can be seen that the method have the advantages that
(1) by covering sheet metal, simple, low cost on aperture, the most cleverly the residual gas within long-life space travelling wave tube can be rejected to the working environment (space) of space travelling wave tube；
(2) by beam bombardment sheet metal, produce gas leakage, it is to avoid the negative electrode too much brought because the residual gas of long-life space travelling wave tube and the damage of parts, extend the life-span of space travelling wave tube, produce great economic benefit；
(3) by the sheet metal covered, make travelling-wave tubes build with " window " with external environment, " window " should can open after electron bombardment a period of time and leak air, owing to the vacuum in space is up to 1 × 10-8More than Pa, the vacuum of moonscape is more up to 10-10More than Pa, the residual gas within such space travelling wave tube will be entered in the space that vacuum is the highest by " window " opened, thus improve the final vacuum in space travelling wave tube.
Accompanying drawing explanation
Fig. 1 is the space travelling wave tube device schematic diagram of prior art；
The space travelling wave tube device schematic diagram of Fig. 2 one embodiment of the invention；
[main element symbol description]
1-electron gun, 2-slow-wave component, 3-electron beam, 4-collector, 5-window, 6-storage room
Detailed description of the invention
The basic conception of the present invention is, it is provided that the collector of a kind of space travelling wave tube, and wherein, the bottom of collector offers an aperture；Airtight covering one sheet metal on described aperture.
For coverage mode, can be various coverage mode commonly used in the prior art, such as laser fusion welding, welding etc., as long as airtight combination between sheet metal and aperture can be realized.Preferably coverage mode is welding or laser fusion welding, more preferably welding.After covering a sheet metal bottom collector, forming one " window " structure, this window can be opened after electron bombardment a period of time, and such travelling-wave tubes internal residual gas is by this window, it is possible to the extraneous discharge of more condition of high vacuum degree.For airtight, being limited with air tight, preferred leak rate is less than 1 × 10-9Pa.m3/s.For the bottom of collector, be relative to electron beam launch party to for, be the distalmost end relative to electron beam bottom this.
For sheet metal, it is preferred that the material of sheet metal is stainless steel.Preferably, the thickness of sheet metal is set as that beam bombardment leaked air after 2000-3000 hour and is limited, mainly due to long-life space travelling wave tube under the normal pressure of ground the seasoned time at about 1000 hours；Further preferred thickness is 0.05-5mm.
For the setting of aperture, hole diameter is unsuitable excessive, preferably at 0.4-1.6mm, further preferred for 0.7-1.2mm, more preferably 0.9-1.1mm.Leak rate between aperture and sheet metal is the least, it is preferred that less than 1 × 10-9Pa.m3/s。
Based on same inventive concept, the present invention provides the preparation method of the collector of a kind of space travelling wave tube, including step:
(1) aperture is offered in the bottom at collector；
(2) on described aperture, cover a sheet metal, make to be formed between sheet metal and aperture airtight.
Based on same inventive concept, the present invention provides the preparation method of a kind of space travelling wave tube, it is characterised in that include step:
(1) aperture is offered in the bottom at collector；
(2) on described aperture, cover a sheet metal, make to be formed between sheet metal and aperture confined space；
(3) collector that will be covered with sheet metal welds with slow-wave component, and slow-wave component welds with electron gun, sheet metal described in described gun alignment.
Further, in above-mentioned preparation method, include after step (3): utilize travelling-wave tubes baking exhaust station to be vacuumized by the travelling-wave tubes welded, preferably vacuum 1 × 10-6More than pa, it is further preferred that be 5 × 10-7More than pa；In this step, vacuum is the highest, is more conducive to promoting the seasoned effect in travelling-wave tubes later stage.
Further, in above-mentioned preparation method, include after step (3): the space travelling wave tube of sealed-off exhaust station is powered up seasoned, it is thus achieved that the long-life space travelling wave tube of stability.
In the art, room temperature is generally to 20 DEG C～30 DEG C, and normal pressure refers to 1.013 × 105Pa。
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and referring to the drawings, the present invention is described in more detail.It should be noted that in accompanying drawing or specification describe, similar or identical part all uses identical figure number.The implementation not illustrated in accompanying drawing or describe, for form known to a person of ordinary skill in the art in art.Although it addition, the demonstration of the parameter comprising particular value can be provided herein, it is to be understood that parameter is worth equal to corresponding without definite, but can be similar to be worth accordingly in acceptable error margin or design constraint.
See Fig. 2, in one exemplary embodiment of the present invention, it is provided that the preparation method of a kind of space travelling wave tube.Fig. 1 is the structural representation of general spatial travelling-wave tubes；Fig. 2 is the structural representation of embodiment of the present invention long-life space travelling wave tube；Stainless steel thickness is 1mm, and at 200V, 70mA, the beam bombardment of beam spot 2.5mm leaked air after 20 hours, and leakage rate is higher than 1 × 10-8Pa.m3/s.Refer to Fig. 1 and Fig. 2, the present embodiment includes:
Step A, opens an aperture by the bottom of part collector 4；
This aperture can be got to by electronics when travelling-wave tubes works, and " window " should leak air after 2000 hours at beam bombardment and be advisable because long-life space travelling wave tube under the normal pressure of ground the seasoned time at about 1000 hours.Hole diameter is unsuitable excessive, typically at about 1mm.
Step B, welds together " window " 5 that metal makes with narrow meshed collector, and forms storeroom 6；
Using soldering tech to weld between " window " 5 and narrow meshed collector that metal makes, its leak rate should be less than 1 × 10-9Pa.m3/s." window " 5 can use the stainless steel material containing Cr, " window " should can open after electron bombardment a period of time and leak air, and leak rate starts more than 1 × 10-8Pa.m3/ s, and speed can be increasing along with the prolongation of electron bombardment time.The Cr element that beam bombardment produces is stored in storeroom 6.Owing to the vacuum in space is up to 1 × 10-8More than Pa, the residual gas within such space travelling wave tube will be entered in the space that vacuum is the highest by " window " opened, thus be greatly improved in space travelling wave tube final vacuum, and then be greatly prolonged the life-span of device.
Step C, welds the collector having welded metal " window " with slow-wave component 2, and slow-wave component 2 welds with electron gun 1；
Soldering tech is used to weld between collector with slow-wave component 2, between slow-wave component 2 and electron gun 1；
Step D, utilizes travelling-wave tubes baking exhaust station that the travelling-wave tubes welded is evacuated to 1 × 10-6More than pa；
In this step, vacuum is the highest, is more conducive to promoting the seasoned effect in travelling-wave tubes later stage.In the preferred embodiment of the invention, final vacuum should be 5 × 10-7More than pa.
Step E, is powered up seasoned to the space travelling wave tube of sealed-off exhaust station, it is thus achieved that the long-life space travelling wave tube of stability.
In the art, room temperature is generally to 20 DEG C～30 DEG C, and normal pressure refers to 1.013 × 105Pa。
So far, already in connection with accompanying drawing, the present embodiment has been described in detail.According to above description, the collector degasification method of present invention long-life space travelling wave tube should have been had and clearly recognized by those skilled in the art.
Additionally, the above-mentioned definition to each method is not limited in the various concrete forms mentioned in embodiment, it can be carried out replacing with knowing simply by those of ordinary skill in the art.
In sum, the present invention, by one " window " (stainless steel etc.) on collector bottom welding, should " window " can be leaked gas after electron bombardment a period of time, and such space travelling wave tube is internal, and (vacuum is generally 5 × 10-6Pa) residual gas will enter into vacuum 1 × 10 by " window " opened-8In the space of more than Pa；Thus be greatly improved in space travelling wave tube final vacuum, and then be greatly prolonged life-span of device, produce great economic benefit.The present invention is simple, low cost, has the highest economic worth.
Particular embodiments described above, to the purpose of the present invention, technical scheme and beneficial effect are further described, it is it should be understood that, the foregoing is only the specific embodiment of the present invention, it is not limited to the present invention, all within the spirit and principles in the present invention, the any amendment made, equivalent, improve, should be included within the scope of the present invention particular embodiments described above, to the purpose of the present invention, technical scheme and beneficial effect are further described, it it should be understood that, the foregoing is only the specific embodiment of the present invention, it is not limited to the present invention, all within the spirit and principles in the present invention, the any amendment made, equivalent, improve, should be included within the scope of the present invention.
Claims (10)
1. the collector of a space travelling wave tube, it is characterised in that:
The bottom of described collector offers an aperture, airtight covering one sheet metal on described aperture.
The collector of space travelling wave tube the most according to claim 1, it is characterised in that described
A sheet metal is covered by welding or laser fusion welding mode on aperture.
The collector of space travelling wave tube the most according to claim 1, it is characterised in that described
Sheet metal is the stainless steel material containing chromium.
The collector of space travelling wave tube the most according to claim 1, it is characterised in that described
The thickness of sheet metal be set as beam bombardment after 2000-3000 hour leak rate be higher than
1×10-8Pa.m3/s。
The collector of space travelling wave tube the most according to claim 1, it is characterised in that aperture
And leak rate is less than 1 × 10 between the sheet metal covered-9Pa.m3/s。
6. the preparation method of the collector of a space travelling wave tube, it is characterised in that include step:
(1) aperture is offered in the bottom at collector；
(2) on described aperture, cover a sheet metal, make to be formed between sheet metal and aperture airtight.
The preparation method of the collector of space travelling wave tube the most according to claim 6, its feature
Being, the mode covered described in step (2) is welding or laser fusion welding.
8. the preparation method of a space travelling wave tube, it is characterised in that include step:
(1) aperture is offered in the bottom at the collector of travelling-wave tubes；
(2) on described aperture, cover a sheet metal, make to be formed between sheet metal and aperture confined air
Between；
(3) collector that will be covered with sheet metal welds with slow-wave component, slow-wave component and electron gun
Welding, makes sheet metal described in described gun alignment after welding.
The preparation method of space travelling wave tube the most according to claim 8, it is characterised in that institute
The mode stating covering is welding or laser fusion welding.
10. a space travelling wave tube, it is characterised in that include described in claim 1-5 any one
The collector of space travelling wave tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610232328.5A CN105762047B (en) | 2016-04-14 | 2016-04-14 | Space travelling wave tube and its collector, preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610232328.5A CN105762047B (en) | 2016-04-14 | 2016-04-14 | Space travelling wave tube and its collector, preparation method |
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| Publication Number | Publication Date |
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| CN105762047A true CN105762047A (en) | 2016-07-13 |
| CN105762047B CN105762047B (en) | 2017-08-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683959A (en) * | 2017-01-25 | 2017-05-17 | 中国科学院电子学研究所 | Collector electrode, preparation method thereof, space traveling wave tube and preparation method thereof |
| CN109192637A (en) * | 2018-09-14 | 2019-01-11 | 电子科技大学 | A kind of heat-insulated collection device of ion and the electron gun with the device |
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| CN106683959B (en) * | 2017-01-25 | 2018-10-02 | 中国科学院电子学研究所 | Collector and preparation method thereof, space travelling wave tube and preparation method thereof |
| CN109192637A (en) * | 2018-09-14 | 2019-01-11 | 电子科技大学 | A kind of heat-insulated collection device of ion and the electron gun with the device |
| CN109192637B (en) * | 2018-09-14 | 2019-09-17 | 电子科技大学 | A kind of heat-insulated collection device of ion and the electron gun with the device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105762047B (en) | 2017-08-11 |
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