CN107578978B - There is the microchannel photomultiplier of position sensitive film grid for space optical communication - Google Patents
There is the microchannel photomultiplier of position sensitive film grid for space optical communication Download PDFInfo
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- CN107578978B CN107578978B CN201611011295.8A CN201611011295A CN107578978B CN 107578978 B CN107578978 B CN 107578978B CN 201611011295 A CN201611011295 A CN 201611011295A CN 107578978 B CN107578978 B CN 107578978B
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Abstract
For space optical communication there is the microchannel photomultiplier of position sensitive film grid to belong to photoelectricity vacuum device technical field.Prior art accelerating field intensity is excessive, and acceleration distance is too long, and self-saturation may occur for position-sensitive anode.Its component part of the invention includes window, photocathode, microchannel plate, anode, microchannel plate has multistage, added with the identical voltage in direction between photocathode, microchannel plate at different levels, anode, by anode output light electric current, anode microchannel plate is between afterbody microchannel plate and anode；It is characterized in that, position-sensitive anode is located in anode microchannel plate front, insulating film is located between position-sensitive anode, anode microchannel plate front metal film, position-sensitive anode and insulating film are reticular membrane, mesh is corresponding with the microchannel of anode microchannel plate, light photoelectric current is positioned by position-sensitive anode output laser communication, laser communication signal light photoelectric current is exported by anode.
Description
Technical field
The present invention relates to a kind of microchannel photomultipliers for space optical communication with position sensitive film grid, belong to light
Electron tube technical field.
Background technique
Application No. is 201510510586.0 Chinese invention patent application disclose one it is entitled " for space
The technical solution of microchannel photomultiplier of the optic communication with composite waveguide anode ", as shown in Figure 1, its composition portion of the program
Dividing includes window 1, photocathode 2, microchannel plate 3, anode, and microchannel plate 3 has multistage, in photocathode 2, microchannel plate at different levels
3, added with the identical voltage in direction between anode, by anode output light electric current；The anode is micro- logical by transmission anode 4, anode
Guidance tape 5, position-sensitive anode 6 are constituted, and transmission anode 4, position-sensitive anode 3 are located at 5 front of anode microchannel plate, the back side, electronics
Beam focusing electrode 7 exports laser communication signal between afterbody microchannel plate 3 and transmission anode 4, by transmission anode 4
Light photoelectric current exports laser communication by position-sensitive anode 6 and positions light photoelectric current.The good effect of the program is essence tracking and leads to
Letter is combined into one, so that optical transmitter and receiver reduces an optical antenna.
However, there are probelem in two aspects for the program.First is that the intensity in order to guarantee signal light photoelectric current, transmission-type sun
Pole 4 is one layer of whole Zhang Lianxu Al film for being attached to positive 0.4 μ m-thick of anode microchannel plate 5, rather than reticular membrane, while also being required
Positioning light in laser communication light eventually arrives at position-sensitive anode 6, for this purpose, at different levels voltage designs are afterbody microchannel plate 3
The pressure difference being emitted between end face and the previous copper ring plate of Electron Beam Focusing pole 7 is 2000V；Two of Electron Beam Focusing pole 7
Pressure difference between copper ring plate is 1000V；Pressure between the copper ring plate of the latter of Electron Beam Focusing pole 7 and transmission anode 4
Difference is 3000V.Then, electron beam accelerates, one under up to 6000V forceful electric power field action by the acceleration distance of sub- decimeter level
Fraction tunnelling transmission anode 4.But so high interpolar accelerating field does not mean only that the volume and power consumption of power supply
It increases, and the vacuum sealing of microchannel photomultiplier is required to improve, will necessarily also shorten microchannel photomultiplier transit
The service life of pipe.So long acceleration distance also provides biggish space for beam scatter, and then reduces microchannel photomultiplier transit
The optical delivery ability of pipe haves no alternative but the program using Electron Beam Focusing pole 7 and modulates high energy electron cloud wavefront, makes its convergence.Two
It is that the high-power electron beam after tunnelling is by 5 secondary multiplication of anode microchannel plate, if from the overflow that window 1 inputs, in view of position
The design feature of quick anode 6 will occur self-saturation, and then increase incoming communications light optical axis position error.
Summary of the invention
In order to by same microchannel photomultiplier output laser communication signal light photoelectric current and positioning light photoelectric current
Under the premise of, electron beam accelerating field voltage is reduced, electron beam acceleration distance is reduced, and avoids position-sensitive anode that self-saturation occurs,
We have invented a kind of microchannel photomultipliers for space optical communication with position sensitive film grid.
The present invention's has its component part packet of the microchannel photomultiplier of position sensitive film grid for space optical communication
Window 1, photocathode 2, microchannel plate 3, anode 8 are included, as shown in Fig. 2, microchannel plate 3 has multistage, in photocathode 2, at different levels
Added with the identical voltage in direction between microchannel plate 3, anode 8, by 8 output light electric current of anode, anode microchannel plate 5 is located at last
Between level-one microchannel plate 3 and anode 8；It is characterized in that, position-sensitive anode 6 is located in 5 front of anode microchannel plate, insulating film 9
Between position-sensitive anode 6,5 front metal film 10 of anode microchannel plate, position-sensitive anode 6 and insulating film 9 are reticular membrane, are such as schemed
Shown in 3, mesh is corresponding with the microchannel of anode microchannel plate 5, exports laser communication by position-sensitive anode 6 and positions light photoelectric current, by
Anode 8 exports laser communication signal light photoelectric current.
The present invention it has technical effect that, in the present invention, in netted membranaceous position-sensitive anode 6 as in electron tube
A kind of sensitive film grid, between photocathode 2 and anode 8, when laser space communication optical transmitter and receiver is using the present invention
When microchannel photomultiplier with composite waveguide anode, still complete to make the coarse alignment of beacon beam by rough tracking system
Optical transmitter and receiver target maintains CCD field of view center range, so ensure target will not fly out essence tracking field range.Communication ray enters
Microchannel photomultiplier optical antenna is penetrated, 2 surface of photocathode is focused on, concurrently gives birth to photoelectric conversion.Photocathode 2 is according to entering
Penetrate Communication ray light spot shape launching electronics, these electronics every level-one microchannel plate 3 of accelerating impact step by step under forceful electric power field action, hair
Raw electron multiplication, forms high energy electron cloud.The high energy electron cloud continues to accelerate to hit position-sensitive anode 6 under the action of strong electrical field.
A part of electronics in the high high energy electron cloud of kinetic energy is first collected by position-sensitive anode 6, and exports laser communication positioning light photoelectricity
Stream, the optical axis for thus completing incoming communications light are accurately positioned.Another part electronics in the high high energy electron cloud of kinetic energy via
Position-sensitive anode 6, insulating film 9 mesh enter the microchannel of anode microchannel plate 5, pass through anode microchannel plate 5 during
Electron multiplication again is obtained, is finally collected by anode 8, and exports laser communication signal light photoelectric current, completes laser communication
The extraction of signal.Under the premise of this, just as above words, the high high energy electron cloud of the kinetic energy to double by multistage enters sun
It is to complete this process via the mesh of position-sensitive anode 6, insulating film 9 in the microchannel of atomic channel plate 5, rather than with transmission metal
The mode of film is completed, it is therefore not necessary to high voltage electric field and long acceleration distance.It is not necessary to which it is poly- to reuse electron beam in the prior art
Jiao Ji.Since position-sensitive anode 6 moves to front by the back side of anode microchannel plate 5, by the series and electric field that control microchannel plate 3
Intensity can prevent self-saturating generation.And the anode 8 for being located at 5 back side of anode microchannel plate is conventional anode, no matter electron beam
Have mostly by force, self-saturation will not occur.
Detailed description of the invention
Fig. 1 is the microchannel photomultiplier structural schematic diagram for being currently used for space optical communication and having composite waveguide anode.
Fig. 2 is the microchannel photomultiplier structural schematic diagram for space optical communication with position sensitive film grid of the present invention.Fig. 3 is
It is quick in netted membranaceous position in the microchannel photomultiplier for space optical communication with position sensitive film grid of the present invention
The form schematic diagram of anode and insulating film, the figure double as being Figure of abstract.
Specific embodiment
The present invention's has its component part packet of the microchannel photomultiplier of position sensitive film grid for space optical communication
Window 1, photocathode 2, microchannel plate 3, anode 8 are included, as shown in Fig. 2, microchannel plate 3 has multistage, in photocathode 2, at different levels
Added with the identical voltage in direction between microchannel plate 3, anode 8, by 8 output light electric current of anode, anode microchannel plate 5 is located at last
Between level-one microchannel plate 3 and anode 8.Position-sensitive anode 6 is located in 5 front of anode microchannel plate, and insulating film 9 is located at position-sensitive anode
6, between 5 front metal film 10 of anode microchannel plate, position-sensitive anode 6 and insulating film 9 are reticular membrane, as shown in figure 3, mesh with
The microchannel of anode microchannel plate 5 is corresponding, exports laser communication by position-sensitive anode 6 and positions light photoelectric current, exports laser by anode 8
Signal of communication light photoelectric current.
For the photocathode 2 with a thickness of 5mm, substrate is quartz glass plate, plates GaAs film or golden film, film thickness 100nm.
The channel aperture of the microchannel plate 3 is 6 μm, and access opening is away from being 8 μm, and with a thickness of 0.5mm, draw ratio 50 is
A kind of microchannel plate with ion feedback preventing film, photoelectron incident end face sputter the SiO for having 4nm thickness2Layer.
The 5 channel aperture of anode microchannel plate is 6 μm, and access opening is away from being 8 μm, with a thickness of 0.5mm, draw ratio 50.
For 6 μm of channel aperture, in 5 front production insulating film 9 of anode microchannel plate and position-sensitive anode 6, it not will cause micro- logical
Road blocking, can disposably be made according to existing filming technology in netted membranaceous insulating film 9 and position-sensitive anode 6.
Afterbody microchannel plate 3 be emitted the pressure difference between end face and 5 front metal film 10 of anode microchannel plate be 50~
200V is far below the prior art.
The insulating film 9 is the SiO of micron dimension thickness2Layer, film layer resistance is greater than 20M Ω/, so that position-sensitive anode 6
The good insulation between 5 front metal film 10 of anode microchannel plate improves positioning signal and extracts level of impedance match.
The position-sensitive anode 6 is the copper film of 2 μ m-thicks.
Anode 8 is the copper sheet of 0.5mm thickness.
Claims (3)
1. a kind of microchannel photomultiplier for space optical communication with position sensitive film grid, component part includes window
(1), photocathode (2), microchannel plate (3), anode (8), microchannel plate (3) have multistage, in photocathode (2), at different levels micro- logical
Added with the identical voltage in direction between guidance tape (3), anode (8), by anode (8) output light electric current, anode microchannel plate (5) is located at
Between afterbody microchannel plate (3) and anode (8)；It is characterized in that, the position-sensitive anode (6) as position sensitive film grid is located at
In anode microchannel plate (5) front, insulating film (9) is located at position-sensitive anode (6), anode microchannel plate (5) front metal film (10)
Between, position-sensitive anode (6) and insulating film (9) they are reticular membrane, and mesh is corresponding with the microchannel of anode microchannel plate (5), by position
Quick anode (6) output laser communication positions light photoelectric current, exports laser communication signal light photoelectric current by anode (8).
2. the microchannel photomultiplier for space optical communication with position sensitive film grid according to claim 1,
It is characterized in that, the insulating film (9) is the SiO of micron dimension thickness2Layer, film layer resistance are greater than 20M Ω/.
3. the microchannel photomultiplier for space optical communication with position sensitive film grid according to claim 1,
It is characterized in that, the position-sensitive anode (6) is the copper film of 2 μ m-thicks；The anode (8) is the copper sheet of 0.5mm thickness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611011295.8A CN107578978B (en) | 2016-11-10 | 2016-11-10 | There is the microchannel photomultiplier of position sensitive film grid for space optical communication |
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| CN201611011295.8A CN107578978B (en) | 2016-11-10 | 2016-11-10 | There is the microchannel photomultiplier of position sensitive film grid for space optical communication |
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| CN107578978B true CN107578978B (en) | 2019-06-07 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5347132A (en) * | 1993-07-30 | 1994-09-13 | Wisconsin Alumni Research Foundation | Position sensitive detector providing position information with enhanced reliability and performance |
| US5430299A (en) * | 1991-10-22 | 1995-07-04 | British Technology Group Ltd. | Scintillation crystal radiation detector which uses a multiwire counter structure in a position sensitive photo-multiplier |
| CN1304544A (en) * | 1998-06-01 | 2001-07-18 | 滨松光子学株式会社 | Photomultiplier unit radiation sensor |
| JP2002296351A (en) * | 2001-03-30 | 2002-10-09 | Japan Science & Technology Corp | Radiation detector and pet apparatus using the same |
| CN102760052A (en) * | 2012-03-30 | 2012-10-31 | 中国科学院西安光学精密机械研究所 | Random source based on photon space and time randomness as well as random number extraction method |
| CN203799020U (en) * | 2013-12-19 | 2014-08-27 | 中国科学院西安光学精密机械研究所 | Device for detecting dark count of micro-channel plate |
-
2016
- 2016-11-10 CN CN201611011295.8A patent/CN107578978B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5430299A (en) * | 1991-10-22 | 1995-07-04 | British Technology Group Ltd. | Scintillation crystal radiation detector which uses a multiwire counter structure in a position sensitive photo-multiplier |
| US5347132A (en) * | 1993-07-30 | 1994-09-13 | Wisconsin Alumni Research Foundation | Position sensitive detector providing position information with enhanced reliability and performance |
| CN1304544A (en) * | 1998-06-01 | 2001-07-18 | 滨松光子学株式会社 | Photomultiplier unit radiation sensor |
| JP2002296351A (en) * | 2001-03-30 | 2002-10-09 | Japan Science & Technology Corp | Radiation detector and pet apparatus using the same |
| CN102760052A (en) * | 2012-03-30 | 2012-10-31 | 中国科学院西安光学精密机械研究所 | Random source based on photon space and time randomness as well as random number extraction method |
| CN203799020U (en) * | 2013-12-19 | 2014-08-27 | 中国科学院西安光学精密机械研究所 | Device for detecting dark count of micro-channel plate |
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Effective date of registration: 20210126 Address after: Room 1506, building 4, Hansen xiangxieli community, intersection of Chaoqun South Street and Chuangxin Road, high tech Zone, Changchun City, Jilin Province Patentee after: CHANGCHUN WEISHI ZHUIGUANG TECHNOLOGY Co.,Ltd. Address before: 130022 No. 7089 Satellite Road, Changchun, Jilin, Chaoyang District Patentee before: CHANGCHUN University OF SCIENCE AND TECHNOLOGY |
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