CN105470091A - Space low-energy electron simulation source based on micro channel board - Google Patents
Space low-energy electron simulation source based on micro channel board Download PDFInfo
- Publication number
- CN105470091A CN105470091A CN201510796539.7A CN201510796539A CN105470091A CN 105470091 A CN105470091 A CN 105470091A CN 201510796539 A CN201510796539 A CN 201510796539A CN 105470091 A CN105470091 A CN 105470091A
- Authority
- CN
- China
- Prior art keywords
- microchannel plate
- energy electron
- space low
- electron
- micro channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
- H01J43/06—Electrode arrangements
- H01J43/08—Cathode arrangements
Landscapes
- Electron Tubes For Measurement (AREA)
Abstract
The invention discloses a space low-energy electron simulation source based on a micro channel board. The space low-energy electron simulation source based on the micro channel board comprises a heating board, the micro channel board, a power source and two grid electrodes, wherein the heating board is used for heating the micro channel board (2) and controlling heat noise of the micro channel board, the micro channel board is loaded with an offset voltage through the power source and is used for generating electron beam flows, the two grid electrodes are arranged in an electron beam flow generation direction, a voltage difference is generated between the two grid electrodes, a uniform electric field is generated between the two grid electrodes, and the electrons generated by the micro channel board are accelerated. According to the space low-energy electron simulation source, a problem of light noise existing in light electron emission sources is avoided in principle, through controlling the temperature and the offset voltage of the micro channel board, weak electron flow density, a relatively large dynamic scope and uniform large-scale electron beam flows can be generated.
Description
Technical field
The present invention relates to precise light field of electromechanical technology, particularly relate to a kind of space low-energy electron dummy source based on microchannel plate being applicable to the ground experiment checking of X-ray pulsar navigation detector and the demarcation of space plasma probe.
Background technology
In the x-ray photon for the purpose of space orientation is measured, to the measurement count of the x-ray photon of a certain pulsar radiation, except the photon counting from pulsar source, wherein also mix the additional counting entering visual field of all directions radiation in detector field of view, the additional counting in this non-pulse star source from cosmic space is called background noise.In pulsar navigation process, radiation zone zone charged particle in background noise also can be mingled among pulsar radiation X ray signal, the photon counting that paired pulses star navigation detector receives produces interference, real pulsar radiation signal is made to be submerged among background noise, increase the complexity of photonic data process, and finally may affect the precision of pulsar navigation.Therefore, need the electronic background noise of simulating radiation zone in ground experiment room, the electronic background noise that realistic simulation pulsar navigation detector receives in real space, to check the ability and navigation accuracy index that useful signal extracts under complex environment.
Electron beam source conventional is in the world primarily of the electron source of filament cathode and ultraviolet light negative electrode.Traditional electron source adopts hot cathode as electron source, and when filament cathode is heated to high temperature, electronics acquisition is greater than the kinetic energy of surface potential barrier and overflows.The electronic beam current of such electron source is usually very strong, and is difficult to the electronic beam current realizing Large-Area-Uniform.In addition, the temperature needed due to filament emission electron institute is very high, and hot filament, through long-time distillation, oxidation and ion sputtering, makes the lost of life in hot-cathode electric source.The golden film being very deposited on the quartz glass back side time conventional in ultraviolet light cathodic electricity component or nickel film.Negative electrode launches photoelectron under the irradiation of mercury-arc lamp, is then accelerated by electrostatic field, obtains the electron beam of required energy range.Although ultraviolet light cathodic electricity component can obtain the electron beam that high energy resolution, Investigation of Large Area Electron Beam and energy are low to moderate a few eV.But this electron source cannot solve " optical noise " problem in the application always, and the stability of electron beam and uniformity are subject to the serious restriction of UV light source performance and cathode film layer performance.Therefore, the electron source of filament cathode and ultraviolet light negative electrode all can not be used for the test of pulsar navigation detector.
In addition, conventional space low-energy electron dummy source also has low energy radiator beta-ray, and be mainly 63Ni and 3H radioactive source, the half-life is respectively 100.1 and 12.3.63Ni electronics ceiling capacity is 66.85keV in theory, and average energy is about 17keV; 3H electronics ceiling capacity is 18.6keV, and average energy is about 5.7keV.These radioactive sources can not be used for the test of pulsar navigation detector.
Summary of the invention
In view of this, the invention provides a kind of space low-energy electron dummy source based on microchannel plate, extremely weak electron current densities, larger dynamic range and uniform large face battle array electronic beam current can be produced.
A kind of space low-energy electron dummy source based on microchannel plate of the present invention, comprises heating plate, microchannel plate, power supply and two grid electrodes;
Described heating plate is positioned at the side of described microchannel plate, for heating microchannel plate, controls the thermal noise of microchannel plate;
Described microchannel plate is loaded with bias voltage, for generation of electronic beam current by described power supply;
Described two grid electrodes are parallel to described microchannel plate and are placed on electronic beam current generation direction; Described power supply is two grid electrode on-load voltages, and coating-forming voltage is poor between; Produce uniform electric field between grid electrode, the electronics that microchannel plate produces is accelerated.
Preferably, described heating plate is provided with the thermocouple testing described microchannel plate thermal noise.
Preferably, described heating plate comprises ceramic wafer and heater strip; Described heater strip is coiled on a side of ceramic wafer, and adjacent two heater strips are parallel to each other, and institute's galvanization direction is contrary.
Preferably, described adjacent two heater strips adopt stainless steel sleeve to carry out armouring.
Preferably, the insulating barrier of described heater strip adopts the processing of magnesium oxide insulated powder.
Preferably, described heater strip rounded or snakelike coiling on ceramic wafer.
Preferably, the material of described grid electrode is gold.
The present invention has following beneficial effect:
(1) the present invention adopts microchannel plate as electron emission source, avoids photoelectron emissions source ubiquitous " optical noise " problem from principle; By controlling temperature and the deflecting voltage of microchannel plate, extremely weak electron current densities, larger dynamic range and uniform large face battle array electronic beam current can be produced;
(2) heater strip adopting the electric current of armouring reverse, is zero to extrinsic current and electric field, thus can not affects the electromagnetic property of other equipment.
Accompanying drawing explanation
Fig. 1 is the space low-energy electron dummy source schematic diagram based on microchannel plate of the present invention.
Wherein, 1-heating plate, 2-microchannel plate, 3-grid electrode.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, describe the present invention.
The object of this invention is to provide a kind of space low-energy electron dummy source based on microchannel plate for X-ray pulsar navigation seeker ground verification experimental verification, as shown in Figure 1, comprise heating plate 1, microchannel plate 2, power supply and two grid electrodes 3; Heating plate 1 is positioned at the side of described microchannel plate 2, for heating microchannel plate 2, controls the thermal noise of microchannel plate 2; The two sides of described microchannel plate 2 are loaded with bias voltage, for generation of electronic beam current; Load relatively high-tension one side in the two sides of microchannel plate 2 and become positive plate, another one side loading low voltage becomes negative plate.The size of bias voltage affects the size of electronic beam current; Two grid electrodes 3 are parallel to described microchannel plate 2 and are placed on electronic beam current generation direction; Described power supply is two grid electrode 3 on-load voltages, and coating-forming voltage is poor between; Produce uniform electric field between grid electrode 3, the electronics that microchannel plate 2 produces is accelerated.
Microchannel plate 2 is electron multiplication devices of a kind of large battle array, and it utilizes secondary electron emission characteristic, and the secondary electron that high-speed impact can be made to produce repeatedly is multiplied, and the electronics finally reaching more than thousand times is incremental.When there is no particle incidence, due to reasons such as thermal noises, the electronic beam current of multiplication also can be caused.By the control to microchannel plate 2 bias voltage or temperature, the adjustment of low current density electronic beam current can be realized.Temperature is higher or bias voltage is higher, and thermal noise is larger, then electric current line is also larger.In addition, the flux stability that this electron source has and power spectrum repeatability be thermionic emission source incomparable, simultaneously avoid photoelectron emissions source ubiquitous " optical noise " problem from principle.Therefore, microchannel plate 2 is ballistic devices of a kind of desirable weak beam intensity of flow electron stream.Adopt microchannel plate 2 as electron emission source, the electronics that its surface produces due to thermal noise, high pressure through microchannel plate 2 two ends will launch electronics after accelerating multiplication, the area of beam spot and microchannel plate 2 is suitable, by controlling the temperature on microchannel plate 2 surface and the high pressure at two ends thereof, realize the wide variation of electronic beam current intensity, the wide variation of electron energy can be controlled by the voltage difference controlling two grid electrodes 3, be suitable for the ground experiment of paired pulses star navigation detector, checking.
Operation principle of the present invention is: be added on monolithic microchannel plate 2 and grid electrode 3 by the power supply of-5 ~-30kV by bleeder circuit, by the yield regulating the temperature of microchannel plate 2 to carry out control noises electronics, by the multiplication constant regulating the bias voltage of microchannel plate 2 to carry out control noises electronics, by the energy regulating the voltage difference of two grid electrodes 3 to control electronics.Thermal noise produce electronics through microchannel plate 2 double after with less energy outgoing, after equipotential drift region is dispersed, form uniform face battle array electronic beam current, then accelerate to the energy value of expectation through accelerating electrode, the electronics free flight of last high energy is to detector position.
The operation principle of the space low-energy electron dummy source based on microchannel plate 2 is given in Fig. 1.By heater strip to the temperature controlling microchannel plate 2, controlled the size of microchannel plate 2 multiplier electrode by the resistance value of R1, and then realize the control of electronic beam current intensity; Form field-free region by microchannel plate 2 backboard and adjacent grid electrode 3 equipotential, multiplied electron is freely drifted about, realize the evenly large face battle array characteristic of electron beam group; Power supply produces voltage difference by point being pressed between two grid electrodes 3 of resistance R2, region thus between two grid electrodes 3 produces uniform electric field, electronics accelerates in uniform electric field district, by the positive plate of microchannel plate 2 alive adjustment realize the adjustment of electron energy.
Microchannel plate 2 is the electron multiplication devices grown up on the basis of channel electron multiplier.The inwall of each passage of microchannel plate 2 scribbles a kind of semi-conducting material launching secondary electron, after having added certain voltage to microchannel plate 2, a uniform electric field will be produced in each channel.This electric field is axial, can make to enter time the photon of electric field or electronics and wall collide to produce secondary electron, and secondary electron is accelerated under the effect of axial electric field, and such secondary electron is encountered on wall can produce more new secondary electron again.When there is no particle incidence, due to reasons such as thermal noises, the electronic beam current of multiplication also can be caused.Therefore, by the control to microchannel plate 2 bias voltage or temperature, the adjustment of low current density electronic beam current can be realized.
The resistive heater that heating plate 3 adopts institute's galvanization direction contrary, by magnesium oxide insulated powder as insulating barrier, and carries out armouring with resistant to elevated temperatures stainless steel sleeve, is overall, forms armouring silk after combination through compaction die.The advantage such as there is withstand voltage, antidetonation, flexible, miniaturized, thermal response time electromagnetic effect be little soon, to external world.By armouring silk according to snakelike or circular coiling in ceramic insulation chassis, for the thermal noise of accurate control and measurement microchannel plate 2.Heating plate 3 is provided with the thermocouple of test microchannel plate 2 thermal noise.
Because the energy of electronics is higher, common material easily produces the stray particulate such as secondary electron and X ray, therefore, have employed the lower and percent of pass of secondary rate up to more than 99% golden net as aperture plate, uniform electric field region can either be formed, effectively can shield again high-pressure osmosis and the generation avoiding offspring.
The high voltage source that the voltage of microchannel plate 2 two ends high pressure and grid electrode 3 shares 1 30keV by the mode of precision resister dividing potential drop is powered, and wherein the voltage difference at microchannel plate 2 two ends is that 0 ~ 1000V is adjustable.Armouring silk is powered by 0 ~ 100V DC power supply of a platform independent.
The energy range of space of the present invention low-energy electron dummy source is 5 ~ 30keV, and the current density scope of electronics is 10 ~ 108cm
-2s
-1, and the effective area of pulsar navigation detector is usually at 200cm
2above, the electron source of traditional filament cathode and ultraviolet light negative electrode is difficult to meet so weak electron current densities, great dynamic range and uniform large face battle array electronic beam current.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. based on a space low-energy electron dummy source for microchannel plate, it is characterized in that, comprise heating plate (1), microchannel plate (2), power supply and two grid electrodes (3);
Described heating plate (1) is positioned at the side of described microchannel plate (2), for heating microchannel plate (2), controls the thermal noise of microchannel plate (2);
(2) are loaded with bias voltage, for generation of electronic beam current by described power supply to described microchannel plate;
Described two grid electrodes (3) are parallel to described microchannel plate (2) and are placed on electronic beam current generation direction; Described power supply is two grid electrode (3) on-load voltages, and coating-forming voltage is poor between; Grid electrode produces uniform electric field between (3), accelerates the electronics that microchannel plate (2) produces.
2. a kind of space low-energy electron dummy source based on microchannel plate as claimed in claim 1, is characterized in that, described heating plate (1) is provided with the thermocouple of test described microchannel plate (2) thermal noise.
3. a kind of space low-energy electron dummy source based on microchannel plate as claimed in claim 1, it is characterized in that, described heating plate (1) comprises ceramic wafer and heater strip; Described heater strip is coiled on a side of ceramic wafer, and adjacent two heater strips are parallel to each other, and institute's galvanization direction is contrary.
4. a kind of space low-energy electron dummy source based on microchannel plate as claimed in claim 3, is characterized in that, described adjacent two heater strips adopt stainless steel sleeve to carry out armouring.
5. a kind of space low-energy electron dummy source based on microchannel plate as claimed in claim 4, is characterized in that, the insulating barrier of described heater strip adopts the processing of magnesium oxide insulated powder.
6. a kind of space low-energy electron dummy source based on microchannel plate as claimed in claim 5, it is characterized in that, described heater strip is rounded or snakelike coiling on ceramic wafer.
7. a kind of space low-energy electron dummy source based on microchannel plate as claimed in claim 1, is characterized in that, the material of described grid electrode (3) is gold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510796539.7A CN105470091B (en) | 2015-11-18 | 2015-11-18 | A kind of space low-energy electron simulation source based on microchannel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510796539.7A CN105470091B (en) | 2015-11-18 | 2015-11-18 | A kind of space low-energy electron simulation source based on microchannel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105470091A true CN105470091A (en) | 2016-04-06 |
| CN105470091B CN105470091B (en) | 2017-07-07 |
Family
ID=55607681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510796539.7A Active CN105470091B (en) | 2015-11-18 | 2015-11-18 | A kind of space low-energy electron simulation source based on microchannel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105470091B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922842A (en) * | 2018-06-13 | 2018-11-30 | 山东航天电子技术研究所 | Modulated X-ray generator and method based on microchannel plate |
| CN114690169A (en) * | 2022-03-09 | 2022-07-01 | 中国科学院国家空间科学中心 | Device and method for detecting space target by using active electron beam |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1006688A (en) * | 1962-10-12 | 1965-10-06 | Westinghouse Electric Corp | Improvements in or relating to high-speed multiplier |
| US5159231A (en) * | 1989-02-13 | 1992-10-27 | Galileo Electro-Optics Corporation | Conductively cooled microchannel plates |
| US20100195801A1 (en) * | 2008-12-02 | 2010-08-05 | U.S.A. as represented by the Adminstrator of the National Aeronautics and Space Administration | Miniature, Low-Power X-Ray Tube Using A Microchannel Electron Generator Electron Source |
| JP2012169210A (en) * | 2011-02-16 | 2012-09-06 | Kobe Steel Ltd | Charged-particle detector and time-of-flight mass spectrometer |
| CN102854240A (en) * | 2011-06-28 | 2013-01-02 | 中国科学院生态环境研究中心 | Ion trap mass spectrometer for organic aerosol ionized by vacuum ultraviolet light |
| JP2014086167A (en) * | 2012-10-19 | 2014-05-12 | Horon:Kk | Electronic detection device and electronic detection method |
| CN103824749A (en) * | 2014-02-19 | 2014-05-28 | 广州禾信分析仪器有限公司 | Filter type flight time mass spectrometer detector and ion screening method |
-
2015
- 2015-11-18 CN CN201510796539.7A patent/CN105470091B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1006688A (en) * | 1962-10-12 | 1965-10-06 | Westinghouse Electric Corp | Improvements in or relating to high-speed multiplier |
| US5159231A (en) * | 1989-02-13 | 1992-10-27 | Galileo Electro-Optics Corporation | Conductively cooled microchannel plates |
| US20100195801A1 (en) * | 2008-12-02 | 2010-08-05 | U.S.A. as represented by the Adminstrator of the National Aeronautics and Space Administration | Miniature, Low-Power X-Ray Tube Using A Microchannel Electron Generator Electron Source |
| JP2012169210A (en) * | 2011-02-16 | 2012-09-06 | Kobe Steel Ltd | Charged-particle detector and time-of-flight mass spectrometer |
| CN102854240A (en) * | 2011-06-28 | 2013-01-02 | 中国科学院生态环境研究中心 | Ion trap mass spectrometer for organic aerosol ionized by vacuum ultraviolet light |
| JP2014086167A (en) * | 2012-10-19 | 2014-05-12 | Horon:Kk | Electronic detection device and electronic detection method |
| CN103824749A (en) * | 2014-02-19 | 2014-05-28 | 广州禾信分析仪器有限公司 | Filter type flight time mass spectrometer detector and ion screening method |
Non-Patent Citations (1)
| Title |
|---|
| A.A. TRENKIN，ET AL: "Formation of Micro-channels and Generation of High-energy Electrons in Nanosecond High-voltage Discharges in Air, Developing in Micro-structuring Regime", 《高电压技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922842A (en) * | 2018-06-13 | 2018-11-30 | 山东航天电子技术研究所 | Modulated X-ray generator and method based on microchannel plate |
| CN114690169A (en) * | 2022-03-09 | 2022-07-01 | 中国科学院国家空间科学中心 | Device and method for detecting space target by using active electron beam |
| CN114690169B (en) * | 2022-03-09 | 2024-05-24 | 中国科学院国家空间科学中心 | Device and method for detecting space target by utilizing active electron beam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105470091B (en) | 2017-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lombardo et al. | Use of large surface microchannel plates for the tagging of intermediate energy exotic beams | |
| Sharma | Muon tracking and triggering with gaseous detectors and some applications | |
| CN108922842A (en) | Modulated X-ray generator and method based on microchannel plate | |
| Moak et al. | Nanosecond pulsing for Van de Graaff accelerators | |
| Li et al. | Influence of electron beam irradiation on DC surface flashover of polyimide in vacuum | |
| CN105470091B (en) | A kind of space low-energy electron simulation source based on microchannel plate | |
| Storey et al. | Development of an ionization profile monitor based on a pixel detector for the CERN Proton Synchrotron | |
| Belyaev et al. | Test beam studies of possibilities to separate particles with gamma factors above 103 with straw based Transition Radiation Detector | |
| Jones et al. | Large-area field-ionization detector for the study of Rydberg atoms | |
| Yakorev et al. | Prototyping and tests for an MRPC-based time-of-flight detector for 1 GeV neutrons | |
| Woody et al. | A prototype combination TPC Cherenkov detector with GEM readout for tracking and particle identification and its potential use at an electron ion Collider | |
| Kruglov et al. | A beam diagnostic system for low-intensity radioactive beams | |
| Bartkoski | Analysis, Prototyping, and Design of an Ionization Profile Monitor for the Spallation Neutron Source Accumulator Ring | |
| Ozok et al. | Geant4 simulation of a conceptual calorimeter based on secondary electron emission | |
| Rodionov et al. | Time parameters of ionizing radiation of anodic and cathodic localization in the megavolt atmospheric discharge | |
| GB2179780A (en) | Electricity and short wavelength radiation generator | |
| Shoji | Measurement of dE/dx resolution of TPC prototype with gating GEM exposed to an electron beam | |
| Ochi et al. | Development of a Micro Pixel Chamber for the ATLAS upgrade | |
| Moxom et al. | Out of core testing of the North Carolina State University PULSTAR reactor positron beam | |
| Di Fraia et al. | Photoionization and Velocity Map Imaging spectroscopy of atoms, molecules and clusters with Synchrotron and Free Electron Laser radiation at Elettra | |
| Miller et al. | The electron gun for the Stanford two-mile accelerator | |
| Variale | Neutron Imager and Flux Monitor Based on Micro Channel Plates (MCP) in Electrostatic Mirror Configuration | |
| MENGE et al. | Experimental comparison of 2-3MV X-ray sources for flash radiography | |
| Fan | Testing RPC Performance with Discharges Ignited by UV Laser Pulses: Precise measurement of gas parameters in approximately realistic RPC configurations | |
| Moleri | Development of large-area gas-avalanche Resistive-Plate WELL detectors: potential sampling elements for digital hadron calorimetry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |