CN206758400U - Assembly structure of anisotropic large dynamic stripe image converter tube - Google Patents
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Abstract
The utility model provides an assembly structure of big dynamic stripe image converter of anisotropy can improve anisotropic focus stripe image converter electron optical system's assembly precision, improves assembly efficiency and qualification rate, improves the uniformity and the interchangeability of streak pipe assembly to finally improve streak pipe preparation efficiency and yield. This assembly structure is formed with the tube welded fastening respectively by three solitary modules, wherein: the time pre-focusing electrode module is mainly formed by integrally hot-melting and sealing a G grid electrode, an F1 focusing electrode and a B1 blanking electrode through a plurality of insulators; the space focusing electrode module mainly comprises four QL space electrodes which are sequentially adjacent along the circumferential direction and correspondingly and respectively sealed by insulator through integral hot melting; the time focusing electrode and deflection plate combined module is mainly formed by integrally hot-melting and sealing a B2 blanking electrode, an F2 focusing electrode, an A anode and two D deflection plates through a plurality of insulators.
Description
Technical field：
It the utility model is related to a kind of mounting technology of ultrafast diagnosis photoelectric device, and in particular to streak camera core component
The assembling structure of striped image converter tube.
Background technology：
Ultrafast phenomena (duration is less than 1 μ s) is widely appeared in nature or scientific and technical research.For example, plant
In electric pulse, semi-conducting material carrier lifetime, laser material caused by photosynthesis, super large-scale integration
Ultrafast photoexcited state relaxation process, the molecular dynamics process of chemical reaction, biomaterial fluorescent emission, surpass caused by laser
Its duration of short laser pulse, strong light-matter interaction physical process etc. are more in psec to femtosecond magnitude, even Ah
In the range of second-time[1].Therefore ultrafast phenomena research is to natural science, the energy, material, biology, optical physics, photochemistry, laser skill
The researchs such as art, strong optical physics, high-energy physics and technical field are significant.
Streak camera can provide the one-dimensional space (or spectrum), one-dimensional intensity and the one-dimensional time of ultrafast process totally three simultaneously
Tie up ultrafast information.Ultrafast phenomena linear diagnostic tool of the streak camera as currently the only high-spatial and temporal resolution, in the time point
The effect for being difficult to substitute is played in the ultrafast phenomena research distinguished.Streak camera mainly by fore optics system, striped image converter tube,
Image intensifier and coupled system, the scanning composition such as automatically controlled, IMAQ and analysis.
Striped image converter tube is the key core device of streak camera, mainly by photocathode, grid, focusing system, deflection
Device and imaging unit composition, its structural principle are as shown in Figure 1.Photocathode is used as striped image converter tube radiation detection sensitive layer,
Striped image converter tube input window vacuum side is produced on, its function is that tested radiation information is converted into light by external photoeffect
Electronics；Grid and focusing system carry out axial acceleration to the electronics comprising measured target information, and electron beam after acceleration is being hung down
Straight axial direction modulation；Deflection system passes through applied voltage and realizes that measured target temporal information is changed to spatial information；Imaging
Unit is typically made up of fluorescent screen (or the image device such as image intensifier, CCD), is bar graph by measured target presentation of information
Picture, so as to complete the detection of ultrafast process.
The application is mainly for the more striped image converter tube of electrode part, such as anisotropic focusing striped image converter tube[2]Carry out
Assembling.Typical striped tubular construction as shown in Fig. 2 the striped image converter tube by time prefocus electrode system (number of parts：3
It is individual), space electrode system (number of parts：4), time focusing electrode system (number of parts：3), deflector (number of components
Amount：2) and fluorescent screen composition, share electrode part 12.To ensure that the locus between each electrode is accurate in assembling process
True property, will also ensure mutual alignment relation precision between each electrode, and any electrode position and correlation produce deviation and can all made
Major defect even homogeneous tube into final homogeneous tube image quality is scrapped, therefore assembly precision and coherence request are very high.
Striped image converter tube internal electrode is all scheduled on glass shell by the point of interface solid welding of shelving of design, by glass bulb
Sealing welding, for electron-optical system work vacuum environment is provided.Size after the completion of striped image converter tube is shelved can be with theory
Design space size produces deviation, and deviation exceedes the image quality that tolerance limit can then influence whole system.Certainly, the original to cause a deviation
Because a lot, but mainly by part's machining errors and shelve error and cause.With the horizontal development of process technology, part processing can
Reach the precision of theory calls, therefore, shelving error then turns into the main cause finally influenceed as matter[3].For being focused on to anisotropic
The analysis of Larger Dynamic streak tube understands that the relative position of the striped pipe electrode assembly precision and electrode and front and rear focusing electrode is smart
Degree is crucial influence factor.
Conventional anisotropic focuses on striped image converter tube assembling structure as shown in Fig. 2 assembly method is to be superimposed electrode one by one
Mode carry out, detailed assembling process is as follows：
Time prefocus electrode group, first on G grids 1, F1 focusing electrodes 2 and B1 blanking electrodes 3 distinguish spot welding constant zero
Part ceramics pole 10 each four, upper and lower each two of the both sides of each electrode；Three electrodes are fixed using mold, ensure its distance and position
After putting relation, in ceramics pole surface soldered time electrode supporting plate 11 two, three electrodes will pass through two time electrode supportings
Plate is fixed and is integrally formed；Time electrode supporting plate 11 is welded and fixed with time electrode connecting plate 12 again, time electrode connecting plate
12 match somebody with somebody with shell welding deadline prefocus electrode assembling.
Space electrode electrode group, it is made up of four perpendicular quadrature of QL space electrodes 4 distributions, first to an electrode spot welding four
Individual part ceramics pole 10, then the opposite side of ceramics pole 10 and space electrode supporting plate 14 are welded and fixed；Repeat the above steps completion
After being connected of four electrodes and electrode supporting plate, the position of four electrode vertical distributions is fixed using mold；In space
The both sides spot welding flange-type part space electrode connecting plate 13 of electrode supporting plate 14, by four uniform space electrode group fixed bits one
Group, last space electrode connecting plate 13 complete the assembling of space electrode with shell welding.
Time focusing electrode and deflecting plates electrode group, mainly by B2 blanking electrodes 5, F2 focusing electrodes 6, A anodes 7 and deflection
Plate 8 forms.Wherein B2 blanking electrodes, F2 focusing electrodes, A anode assembly methods at initial stage and process are similar with time focusing electrode group,
The pre- time electrode supporting plate of time electrode is connected using ceramics pole 10 and fixed using mold；When close to space electrode side
Between electrode supporting plate 11 be welded and fixed with time electrode supporting plate 12；Close to deflecting plates side time electrode supporting plate 11 and anode
Connecting plate 15 is welded and fixed；Deflecting plates 8 is fixed using ceramics pole and the spot welding of deflecting plates supporting plate 16 again, and deflecting plates is supported
Plate 16 is welded and fixed with anode connecting plate 15, and time focusing electrode and deflecting plates electrode group so far are completed into assembling, utilize both sides
Connecting plate is focused on the shell welding deadline and the assembling of deflecting electrode group.
The shell after three groups of electrode assemblings are matched somebody with somebody is completed by more than to be welded, and completes anisotropic focusing striped image converter tube
Assembling.
Problems be present in the assembling scheme：
1) each electrode part is assembled one by one, while to reach requirement (the highest pressure difference of insulation between each electrode
20kV), insulation and supporting construction are complicated.
2) sealing-in shell both ends metalwork axiality, parallel misalignment are larger, and metalwork is electrode system fixation welding
Position, cause to assemble electrode system coaxiality deviation more than Φ 0.1mm, the symmetry of electron-optical system is easily destroyed, to sky
Between resolution ratio affect greatly.
3) space electrode is difficult to control with electron-optical system axis inclination angle, when deviation is more than 0.5 °, scanning direction space
Resolution ratio drops to unacceptable degree so that homogeneous tube assembling failure.
4) more piece shell superposition welding, shell error accumulation cause overall image converter tube internal electrode position deviation and body total
The deviation of length, influences imaging performance.
5) assembly technology is complicated, and efficiency of assembling and qualification rate are low, and assembling uniformity is poor, and later stage debugging needs cost a large amount of
Time.
[1]Scrinzi A,Ivanov MY,Kienberger R,et al.Attosecond
physics.J.Phys.B:At.Mol.Opt.Phys.,2006,39:R1–R37
[2] utility model title：High dynamic anisotropic focusing streak image converter tube, Chinese patent ZL201010574723.4
[3] research that the degree of accuracy influences on streak tube performance parameter is shelved；《Photon journal》The 6th phase of volume 38,2009 6
Month；Author：Precious liter of Liu Hulin Zhao Tian Jinshou etc..
Utility model content：
For problem present in current anisotropic focusing striped image converter tube assembling process, the utility model proposes one kind
The new assembling structure of anisotropy Larger Dynamic striped image converter tube, it is intended to improve anisotropic focusing striped image converter tube electron-optical
The assembly precision of system, simplify assembling structure and technique, improve efficiency of assembling and qualification rate, improve the uniformity of streak tube assembling
And interchangeability, so as to finally improve streak tube producing efficiency and yield rate.
In order to realize the above object the application proposes solution below：
The assembling structure of the anisotropy Larger Dynamic striped image converter tube, welded respectively with shell by three single modules
Fixed to be formed, described three single modules are respectively time prefocus electrode module, space-focusing electrode module, time focusing
Electrode+deflecting plates combinatorial module；The time prefocus electrode module is mainly led to by G grids, F1 focusing electrodes and B1 blanking electrodes
Cross that multiple insulators are integrally heat-sealable to be connect to be formed；The space-focusing electrode module is mainly made up of four QL space electrodes, this
Four QL space electrodes circumferentially successively it is adjacent, correspondingly connect respectively by the way that insulator is integrally heat-sealable；The time focuses on electricity
Pole+deflecting plates combinatorial module mainly passes through multiple insulators by B2 blanking electrodes, F2 focusing electrodes, A anodes and two D deflecting plates
Entirety is heat-sealable to be connect to be formed.
For above-mentioned assembling structure, further can also optimize as follows：
Four insulators are used in time prefocus electrode module.
12 insulators are employed in space-focusing electrode module, wherein per two adjacent QL space electrodes along axle
To being disposed with three insulators.
Six insulators are used in time focusing electrode+deflecting plates combinatorial module.
The implementation method of above-mentioned assembling structure, comprises the following steps：
1) the internal electrode system of striped image converter tube is divided into three modules：Time prefocus electrode module, space are gathered
Burnt electrode module, time focusing electrode+deflecting plates combinatorial module；
2) for each module, after being utilized respectively corresponding mold positioning fixation, pass through glass duration and degree of heating and insulator is carried out
Sealing, respective electrode part is once fixed；Mold is removed afterwards, completes the making of three modules；
3) three modules and shell are carried out into welding to integrate；It is then charged into shell, front loaded negative electrode, rear end welding is glimmering
Optical screen, it is finally completed the assembling of whole striped image converter tube.
Wherein, step 2) is positioned using corresponding mold, and the depth of parallelism of three modules finally given is more preferably less than 20 μm,
Spacing tolerance is less than 25 μm.
Further, the utility model has carried out important optimization also directed to the sealing operation in step 2), i.e., using specific
Sealing device carry out sealing operation.The sealing device includes stand, workbench, cope plate, lifting guide pillar, duration and degree of heating and automatically controlled
Unit；The workbench, lifting guide pillar and the equal location and installation of duration and degree of heating are on the table top of the stand, wherein workbench and stand
Table top is parallel, and insulator fixing groove is provided with workbench；The cope plate is used to fix part to be sealed in its lower surface,
Cope plate is installed in lifting guide pillar and parallel with workbench relative, in the presence of drive mechanism can along lifting guide pillar to
Movable workbench；The duration and degree of heating is arranged in workbench both sides and corresponds to insulator fixing groove, for being heated to insulator, duration and degree of heating energy
Hard to bear control deflection causes cope plate to avoid interference with inter-working during closing up with workbench；
Sealing operation each time follows the steps below：
2.1) sealing prepares
Part to be sealed is fixed on to the lower surface of cope plate using mold assembling；According to the design chi of melt-sealing structure
It is very little, adjust and the lifting travel of cope plate is set；Adjust direction of rotation and the angle of duration and degree of heating, it is ensured that duration and degree of heating is towards outside；Light
Duration and degree of heating, adjust steady to duration and degree of heating burning；
2.2) process is sealed
Be put into insulator in insulator fixing groove on the table, duration and degree of heating heats to insulator, when insulator plus
When hot temperature reaches 500~800 DEG C, duration and degree of heating continues to be heated to reaching sealing requirement, then duration and degree of heating rotated away, closing flame；
Cope plate fall by part and insulator sealing fix, then rise, so far complete part once sealing assembling, after cooling from
Cope plate pulls down the component of sealing assembling.
The utility model has the advantages that：
Whole electrode system is simple in construction, and number of parts is few, and it is easy to integrate assembly technology；It is high to seal fixing intensity, is not easy
Deformation, stability is high during subsequent high temperature processes；Whole electron-optical focusing system physical field is not by or not other constant zeros
Part magnetic interference, therefore properties of product are more stable.
The utility model solves each electrode part of tradition and assembled one by one, due to shell fabrication error bring it is coaxial
Degree, parallel misalignment, add up error is excessive step by step causes assembly technology complicated procedures of forming various, and assembling later stage adjustment workload is big,
It is larger by process operator's subjective impact, the problem of assembly qualified rate is low.Compared to traditional assembling scheme, the utility model will
Substantial amounts of electrode part packet, and after carrying out modularized processing so that assembling number of electrodes greatly reduces, and assembly technology simplifies,
Assembly precision and uniformity are good, and have interchangeability, are worked after assembling without follow-up adjustment, and assembling after image matter is good, and static state is differentiated
Rate is up to 30~35lp/mm.
The utility model can also be applied to the assembly production of other striped image converter tubes, can save substantial amounts of manpower thing
Power, it is suitable for batched operation.
Brief description of the drawings
Fig. 1 is striped image converter tube principle schematic diagram.
Fig. 2 is that traditional anisotropic focuses on striped image converter tube electrode structure schematic diagram.
Fig. 3 is that the utility model anisotropic focuses on striped image converter tube electrode structure schematic diagram.
Fig. 4 is the schematic diagram of time prefocus electrode module shown in Fig. 3.
Fig. 5 is the schematic diagram of space-focusing electrode module shown in Fig. 3.
Fig. 6 is the schematic diagram of time focusing electrode+deflecting plates combinatorial module shown in Fig. 3.
Fig. 7 is modularization precision assembly process flow chart in groups.
Fig. 8 is the streak tube Static-state Space resolution test result of the utility model assembling.
Fig. 9 is the structural representation for the sealing device that the utility model uses in sealing.
Drawing reference numeral explanation：
A-negative electrode, b-grid, c-focusing system, d-deflector, e-fluorescent screen；
1-G grids, 2-F1 focusing electrodes, 3-B1 blanking electrodes, 4-QL space electrodes, 5-B2 blanking electrodes, 6-F2
Focusing electrode, 7-A anodes, 8-D deflecting plates, 9-insulator, 10-ceramics pole, 11-time electrode supporting plate, 12-time electricity
Pole connecting plate, 13-space electrode connecting plate, 14-space electrode supporting plate, 15-anode connecting plate, the support of 16-deflecting plates
Plate；
100-stand, 200-workbench, 300-cope plate, 400-lifting guide pillar, 500-duration and degree of heating, 600-automatically controlled list
Member, 201- insulator fixing grooves, 301- are used for the interface for coordinating fixed sealing retaining element.
Embodiment
The similar part of structure, material, technique is formed one zero by the utility model according to striped image converter tube electrode structure
Part race (group), formulate technique by part family and assembled.Modular method in groups in assembling process is utilized in electrode system
The similitude of part, according to certain criterion Classified into groups, it can be handled with set product using Same Way, so as to expand
Batch, reduce assembly technology, method is more efficient, improve benefit.
It is basic that anisotropic focuses on time prefocus electrode system and time focusing electrode system structure in striped image converter tube
Similar, space electrode electrode system is made up of four structure identical cambered surface electrode omnidirectional distributions, meets the condition assembled in groups,
Therefore, internal electrode system three independent modules (structure such as Fig. 3) have been divided into the assembling of streak tube electrode system：Time is pre-
Focusing electrode module, space-focusing electrode module, time focusing electrode+deflecting plates combinatorial module, by anisotropy striped transshaping
Pipe internal electrode uses the production program of grouping module.After each group of electrode is fixed using mold, pass through glass insulator height
Every group of electrode part is once sealed fixation by temperature sealing, removes positioning clamping fixture afterwards, completes electrode group modularization making so that bar
The work simplification that line pipe assembles 12 electrode parts is the assembling of internal 3 electrode modules, and technique greatly simplifies.In module in groups
Change sealing during, each module use corresponding fixture clamping fixture, ensure that sealing after electrode group precision uniformity with
Interchangeability so that the integrated efficiency of assembling of subsequent stripe image converter tube greatly improves, and assembling survival rate is also protected.
The utility model method technological process is specifically as shown in Figure 7：
It is that electrode divides in groups first；According to anisotropy striped image converter tube internal electrode design of part and locus,
12 part family formations are divided, are divided into 3 groups, a square frame represents one group in figure；Secondly electrode group modular assembly is carried out；Profit
3 modules, respectively prefocus electrode module, space electrode module, focus deflection module are fixed as with mold, utilize glass fire
Head and insulator are sealed to 3 modules, and mold is removed after sealing, and 3 electrode groups turn into 3 fixed electrode modules, its
The depth of parallelism is less than 20 μm, and spacing tolerance is less than 25 μm.Finally all modules are integrated；3 that above-mentioned technique is completed
Electrode module loads in shell according to the conventional method, front loaded negative electrode, rear end welding fluorescent screen, just completes whole striped
The assembling of image converter tube.The striped striped image converter tube assembled is loaded in electron-optical optical bench and carried out as the detection of matter, detection
The high accuracy assembling for completing whole striped image converter tube as matter is qualified.
Wherein sealing operation can also use it is specially designed it is a kind of seal device, the sealing device include stand, workbench,
Cope plate, lifting guide pillar, duration and degree of heating and ECU；The workbench, lifting guide pillar and the equal location and installation of duration and degree of heating are in described
On the table top of frame, wherein workbench is parallel with the table top of stand, and insulator fixing groove is provided with workbench；The cope plate is used
In fixing part to be sealed in its lower surface, cope plate is installed in lifting guide pillar and parallel with workbench relative, is being driven
Can be along lifting guide pillar to movable workbench in the presence of mechanism；The duration and degree of heating is arranged in workbench both sides and corresponds to insulator
Fixing groove, for being heated to insulator, duration and degree of heating, which controlled can deflect, causes cope plate to avoid doing during with workbench closing up
Relate to inter-working.It is specific as shown in Figure 9：
Carriage portion is mainly made up of table top, rectangle steel supporting leg etc., as the main part of the device, for other execution
Component and module provide support and installation site, are the platforms of whole device work, are processed in working region bottom heat-insulated
Layer, ensure normal work under high temperature；
Workbench is made using quartz, and insulator fixing groove is processed on workbench, in the mistake of glass duration and degree of heating high temperature sealing
Cheng Zhong, the position of insulator was both ensured, and had also ensured that insulator was not contaminated, insulator shape does not change, and makes zero after sealing
Part is regular；
The part that cope plate is mainly used in treating sealing is fixed, design interface, using mold by electrode zero during work
After part is fixed, being fixed on cope plate lower surface by interface, (such as interface can be through hole, and through hole constant zero is passed through using screw
Part), cope plate can move up and down in the presence of motor (or pneumatic executive item) along guide pillar, under insulator molten state
Realize sealing；
Guide pillar is used for ensureing cope plate part to be fixed and insulator positional precision on workbench, at high operating temperatures quickly
Realize positioning sealing；
Duration and degree of heating is mainly heated to insulator, and using the two kinds of gas mixture burnings of oxygen and coal gas, insulator is heated
To melting state, in the presence of drive device, glass duration and degree of heating can realize that 360 ° of angular convolutions turn, in sealing cope plate and workbench
Do not interfere inter-working during closing up；
Mainly the work to whole device is set ECU as requested, is lifting, the rotation of duration and degree of heating of cope plate
Turn to wait offer control, rotation and the cope plate of duration and degree of heating decline process chain control, provided safeguard for the trouble free service of whole device.
In addition, also arranging knob, button etc. on table top, each knob, the function of button are mainly to adjust the gas of duration and degree of heating
Ratio, cope plate lifting action switch and travel settings, two duration and degree of heating step switch and direction of rotation, angle initialization；Table top stone
Thermocouple is set below English workbench, insulator melting temperature sealing is monitored, it is ensured that seal the uniformity and stability of technique.
Sealing operation each time can follow the steps below：
2.1) sealing prepares
Part to be sealed is fixed on to the lower surface of cope plate using mold assembling；According to the design chi of melt-sealing structure
It is very little, adjust and the lifting travel of cope plate is set；Adjust direction of rotation and the angle of duration and degree of heating, it is ensured that duration and degree of heating is towards outside；Light
Duration and degree of heating, adjust steady to duration and degree of heating burning；
2.2) process is sealed
Be put into insulator in insulator fixing groove on the table, duration and degree of heating heats to insulator, when insulator plus
When hot temperature reaches 500~800 DEG C, duration and degree of heating continues to be heated to reaching sealing requirement, then duration and degree of heating rotated away, closing flame；
Cope plate fall by part and insulator sealing fix, then rise, so far complete part once sealing assembling, after cooling from
Cope plate pulls down the component of sealing assembling.
The utility model final product structure as shown in figure 3, be mainly made up of eight electrode parts and multigroup insulator 9,
Can be by the way of glass duration and degree of heating sealing.Time prefocus electrode module is by 3 groups of G grids 1, F1 focusing electrodes 2 and B1 blanking electrodes
Into after three electrodes are fixed using mold, heating sealing-ins using glass duration and degree of heating and four insulators 9, once realize three electricity
The assembling of pole is fixed；Space-focusing electrode module is after four QL space electrodes 4 are fixed using mold, to utilize 12 insulators
9 sealings are completed；Time focusing electrode+deflecting plates combinatorial module employs the mode of similar hot melt sealing-in, by B2 blanking electrodes
5th, F2 focusing electrodes 6, A anodes 7, D deflecting plates 8 (two) are fixed using mold, and the electrode group is once completed using six insulators 9
Sealing fix.After three groups of electrodes are welded and fixed with shell respectively, you can complete the assembling of anisotropy striped image converter tube.
Claims (4)
- A kind of 1. assembling structure of anisotropy Larger Dynamic striped image converter tube, it is characterised in that：By three single module difference It is welded and fixed to be formed with shell, described three single modules are respectively time prefocus electrode module, space-focusing electrode mould Block, time focusing electrode+deflecting plates combinatorial module；The time prefocus electrode module is mainly by G grids, F1 focusing electrodes and B1 By multiple insulators, integrally heat-sealable connect to be formed blanking electrode；The space-focusing electrode module is mainly by four QL spaces electricity Pole form, this four QL space electrodes circumferentially successively it is adjacent, correspondingly connect respectively by the way that insulator is integrally heat-sealable；When described Between focusing electrode+deflecting plates combinatorial module mainly passed through by B2 blanking electrodes, F2 focusing electrodes, A anodes and two D deflecting plates it is more Individual insulator is integrally heat-sealable to be connect to be formed.
- 2. the assembling structure of anisotropy Larger Dynamic striped image converter tube according to claim 1, it is characterised in that：When described Between employ four insulators in prefocus electrode module.
- 3. the assembling structure of anisotropy Larger Dynamic striped image converter tube according to claim 1, it is characterised in that：The sky Between employ 12 insulators in focusing electrode module, wherein being set gradually vertically per two adjacent QL space electrodes There are three insulators.
- 4. the assembling structure of anisotropy Larger Dynamic striped image converter tube according to claim 1, it is characterised in that：When described Between employ six insulators in focusing electrode+deflecting plates combinatorial module.
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|---|---|---|---|---|
| CN107104028A (en) * | 2017-04-28 | 2017-08-29 | 中国科学院西安光学精密机械研究所 | Assembly structure and method of anisotropic large dynamic stripe image converter tube |
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2017
- 2017-04-28 CN CN201720464299.5U patent/CN206758400U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104028A (en) * | 2017-04-28 | 2017-08-29 | 中国科学院西安光学精密机械研究所 | Assembly structure and method of anisotropic large dynamic stripe image converter tube |
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