CN109686638A - A kind of electron emission source - Google Patents
A kind of electron emission source Download PDFInfo
- Publication number
- CN109686638A CN109686638A CN201811560603.1A CN201811560603A CN109686638A CN 109686638 A CN109686638 A CN 109686638A CN 201811560603 A CN201811560603 A CN 201811560603A CN 109686638 A CN109686638 A CN 109686638A
- Authority
- CN
- China
- Prior art keywords
- cathode
- anode
- electron emission
- emission source
- grid
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0006—Details applicable to different types of plasma thrusters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J27/00—Ion beam tubes
- H01J27/02—Ion sources; Ion guns
- H01J27/022—Details
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
The invention discloses a kind of electron emission sources, and cathode (7), grid (1), anode (2), reflecting plate (6) are arranged；The cathode (7) is arranged between reflecting plate (6) and anode (2).By adopting the above technical scheme, in ion propeller, the negative electrical charge on aerospace craft surface to be launched, neutralizes cation, aerospace craft is made to be in positive and negative charge equilibrium state by launching electronics, neutralization cation.
Description
Technical field
The invention belongs to the technical fields that spacecraft promotes.More particularly it relates to a kind of electron emission source.
Background technique
Ion propeller, also known as ion engine, be space electric propulsion technology one kind, have than leaping high, it is high-efficient, push away
The small feature of power, is widely used in space propultion, such as spacecraft attitude adjustment control, position holding, orbit maneuver and space flight
Deng.Its principle is to ionize gaseous working medium, and accelerate to spray by cation under forceful electric power field action, is defended by reaction force promotion
Star carries out pose adjustment or Orbit Transformation task.Compared with traditional chemical propeller, the working medium quality of ion propeller needs
It is small, it is that navigation over long distances is most suitable in practical Push Technology.
During the work time, positively charged emission of ions is gone out for ion propeller, obtains reaction force, pushes satellite
Operation.Since satellite is in isolating insulation state in space, satellite itself is since positive charge is launched, the positive negative electricity of satellite surface
Lotus disequilibrium, negative electrical charge will be accumulated in satellite surface, and negative electrical charge is cumulative, and satellite will be in a negative electric field state, just
Ionic charge will be influenced by negative electric field, will be unable to normal transmission.
At this moment an electron emission source is needed, the negative electrical charge of satellite surface is launched, cation is neutralized, makes at satellite
In positive and negative charge equilibrium state.
Summary of the invention
The present invention provides a kind of electron emission source, and the purpose is to so that aerospace craft is kept positive and negative charge equilibrium state.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
Cathode, grid, anode, reflecting plate is arranged in electron emission source of the invention；The described cathode setting reflecting plate with
Between anode.
The grid is arranged between cathode and anode.
The cathode is metallic cathode, and material is tungsten wire or thoriatde-tungsten wire.
The surface coating of the metal material of the cathode, covering material C.
The surface C film of the cathode decomposes the surface for being attached to tungsten wire or thoriatde-tungsten wire by organic substance at high temperature；
The organic substance is methane, ethane.
The surface C film thickness of the cathode is the % of tungsten wire or thoriatde-tungsten wire diameter；
The cathode shape is straight line or helical form.
The slot or hole that electronics passes through are equipped with above the anode.
The grid potential is identical as cathode；The grid is equipped with the hole opposite with the hole of anode or slot or slot,
Electronics is launched by the hole of grid or slot, the hole of anode or slot.
Another technical solution of the invention:
A kind of electron emission source setting cathode anode, reflecting plate；The cathode is arranged between reflecting plate and anode.
Other requirements of the technical program are identical as the first technical solution.
The present invention by adopting the above technical scheme, is used in ion propeller, launching electronics, neutralizes cation, space flight is flown
The negative electrical charge on row device surface is launched, and neutralizes cation, aerospace craft is made to be in positive and negative charge equilibrium state.
Detailed description of the invention
Label in content and figure shown in attached drawing is briefly described as follows:
Fig. 1 is thoriatde-tungsten wire cathode construction schematic diagram of the invention；
Fig. 2 is anode construction schematic diagram of the invention；
Fig. 3 is gate structure schematic diagram of the invention；
Fig. 4 is reflection board structure schematic diagram of the invention；
Fig. 5 is the left view of structure shown in Fig. 4；
Fig. 6 is electronic source construction schematic diagram of the invention；
Fig. 7 is electronic source electrode wiring schematic diagram of the invention.
In the figure, it is marked as
1, grid, 2, anode, 3, ground line, 4, anode supply, 5, cathode power, 6, reflecting plate, 7, cathode.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Illustrate, to help those skilled in the art to have more complete, accurate and deep reason to inventive concept of the invention, technical solution
Solution.
Structure of the invention as shown in Figure 6 is a kind of electron emission source, electronics is used as suitable for satellite ion propeller
Emission source.
In order to realize the goal of the invention for making aerospace craft keep positive and negative charge equilibrium state, the technical side that the present invention takes
Case are as follows:
As shown in Figures 1 to 7, cathode 7, grid 1, anode 2, reflecting plate 6 is arranged in electron emission source of the invention；Described
Cathode 7 is arranged between reflecting plate 6 and anode 2.
Electron emission source of the present invention further includes insulating ceramics etc..
Electron emission source of the invention, in ion propeller, launching electronics, neutralization cation to keep satellite just
Negative electrical charge equilibrium state.
Wherein, the grid 1 is arranged between cathode 7 and anode 2.
The cathode 7 is metallic cathode, and material is tungsten wire or thoriatde-tungsten wire.
The surface coating of the metal material of the cathode 7, covering material are C (covering carbon film in surface).
The surface C film of the cathode 7 decomposes the table for being attached to tungsten wire or thoriatde-tungsten wire by organic substance at high temperature
Face；The organic substance is methane, ethane.
The surface C film thickness of the cathode 7 is the 10% of tungsten wire or thoriatde-tungsten wire diameter；
7 shape of cathode is straight line or helical form.
Fig. 1 is thoriatde-tungsten wire cathode, and coiling is spiral, can also use linear type, and surface passes through pyrolytic organic gas
(such as methane, ethane) covers one layer of carbon film, and carbon film thickness is about the 10% of thoriatde-tungsten wire diameter.
Cathode filament diameter, length, operating temperature, anode voltage, the factors such as Anode-cathode Distance have codetermined emission of cathode
Size of current.When design, it should be required, be comprehensively considered according to required size of current, operating voltage, volume, weight etc., selection is closed
The parameters such as suitable cathode, anode, Anode-cathode Distance, cathode operating temperature, anode voltage.
The anode 2 is equipped with the slot or hole that electronics passes through above.
Before anode 2 is mounted in cathode 7, it is equipped with the slot or hole that electronics passes through above.Tungsten cathode is powered when work, and temperature is about
1800 DEG C, anode 2 adds positive voltage, and under high temperature and electric field collective effect, 7 launching electronics of cathode, pass through 2 slot of anode or hole emits
It goes out.
Fig. 2 is anode schematic diagram.Anode is made of metal resistant to high temperature, is provided with multiple holes (or slot), logical as electronics
Road.
A grid 1, the current potential and yin of grid 1 can be filled to prevent electron beam from beating on anode 2, between cathode 7, anode 2
Pole 7 is identical.
It is provided on grid 1 and is emitted with anode hole (slot) opposite hole (slot), electronics by grid hole (slot), anode hole (slot)
It goes out.
Fig. 3 is grid schematic diagram.Grid is made of metal resistant to high temperature, corresponding with anode, is provided with multiple holes (or slot),
As electron channel.
Anode 2, reflecting plate 6, grid 1 material by metal resistant to high temperature (such as tungsten, molybdenum) make.
Fig. 4 is reflecting plate schematic diagram:
The heat that high temperature cathode 7 radiates is reflected back cathode 7 behind cathode 7 by reflecting plate 6, meanwhile, prevent cathode
7 backward launched electronics.
Fig. 5 is electronic source construction schematic diagram, is from left to right followed successively by reflecting plate, cathode, grid, anode.
Fig. 6 is electronic source electrode wiring schematic diagram.Reflecting plate is connected with cathode one end, grid is connected with the cathode other end,
Thoriatde-tungsten wire cathode two terminates a power supply, makes thoriatde-tungsten wire work at 1800 DEG C or so, positive voltage is added between anode and cathode, makes cathode
Launching electronics are launched from anode hole (or slot).Ordinary circumstance, plus earth (zero potential), cathode connects negative potential, such as figure six
It is shown.Can also be with minus earth (zero potential), anode connects positive potential.
Another technical solution of the invention:
A kind of electron emission source setting 7 anode 2 of cathode, reflecting plate 6；The cathode 7 is arranged in reflecting plate 6 and anode 2
Between.
When 7 emission current of cathode is small, and the intercepting and capturing electric current of anode 2 is little, grid can not also be filled.When not filling grid, part
Electronics is intercepted and captured by anode 2, and under the bombardment of electronics, 2 temperature of anode is increased, it is ensured that 2 temperature of anode, 2 material of anode can be with
In the range of receiving.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out is used, or without changing
It is within the scope of the present invention into the conception and technical scheme of the invention are directly applied to other occasions.
Claims (10)
1. a kind of electron emission source, it is characterised in that: described electron emission source setting cathode (7), grid (1), anode (2),
Reflecting plate (6)；The cathode (7) is arranged between reflecting plate (6) and anode (2).
2. electron emission source described in accordance with the claim 1, it is characterised in that: grid (1) setting is in cathode (7) and sun
Between pole (2).
3. electron emission source described in accordance with the claim 1, it is characterised in that: the cathode (7) is metallic cathode, and material is
Tungsten wire or thoriatde-tungsten wire.
4. electron emission source described in accordance with the claim 3, it is characterised in that: the surface of the metal material of the cathode (7)
Overlay film, covering material C.
5. electron emission source according to claim 4, it is characterised in that: the surface C film of the cathode (7) passes through organic
Substance decomposes the surface for being attached to tungsten wire or thoriatde-tungsten wire at high temperature；The organic substance is methane, ethane.
6. electron emission source described in accordance with the claim 1, it is characterised in that: the surface C film thickness of the cathode (7) is tungsten
The 10% of silk or thoriatde-tungsten wire diameter.
7. electron emission source described in accordance with the claim 1, it is characterised in that: cathode (7) shape is straight line or spiral
Shape.
8. electron emission source described in accordance with the claim 1, it is characterised in that: the anode (2) passes through equipped with electronics above
Slot or hole.
9. electron emission source according to claim 8, it is characterised in that: described grid (1) current potential is identical as cathode；Institute
The grid (1) stated is equipped with the hole opposite with the hole of anode or slot or slot, and electronics passes through the hole of grid (1) or slot, anode (2)
Hole or slot are launched.
10. a kind of electron emission source, it is characterised in that: cathode (7) anode (2), reflecting plate is arranged in the electron emission source
(6)；The cathode (7) is arranged between reflecting plate (6) and anode (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560603.1A CN109686638A (en) | 2018-12-20 | 2018-12-20 | A kind of electron emission source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560603.1A CN109686638A (en) | 2018-12-20 | 2018-12-20 | A kind of electron emission source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109686638A true CN109686638A (en) | 2019-04-26 |
Family
ID=66187957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811560603.1A Pending CN109686638A (en) | 2018-12-20 | 2018-12-20 | A kind of electron emission source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109686638A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010015815A (en) * | 2008-07-03 | 2010-01-21 | Toshiba Corp | Cathode structure for electron tube |
| CN102945781A (en) * | 2012-10-17 | 2013-02-27 | 安徽华东光电技术研究所 | Dual-mode multi-beam electron gun for dual-mode traveling wave tube and control method thereof |
| CN105280461A (en) * | 2015-11-21 | 2016-01-27 | 安徽华东光电技术研究所 | Radiation electron heating electron gun |
| CN206363982U (en) * | 2016-12-26 | 2017-07-28 | 安徽华东光电技术研究所 | A kind of multielectrode grided electron gun |
-
2018
- 2018-12-20 CN CN201811560603.1A patent/CN109686638A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010015815A (en) * | 2008-07-03 | 2010-01-21 | Toshiba Corp | Cathode structure for electron tube |
| CN102945781A (en) * | 2012-10-17 | 2013-02-27 | 安徽华东光电技术研究所 | Dual-mode multi-beam electron gun for dual-mode traveling wave tube and control method thereof |
| CN105280461A (en) * | 2015-11-21 | 2016-01-27 | 安徽华东光电技术研究所 | Radiation electron heating electron gun |
| CN206363982U (en) * | 2016-12-26 | 2017-07-28 | 安徽华东光电技术研究所 | A kind of multielectrode grided electron gun |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190426 |
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| RJ01 | Rejection of invention patent application after publication |