CN109830412A - A kind of novel nano cold-cathode gun - Google Patents
A kind of novel nano cold-cathode gun Download PDFInfo
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- CN109830412A CN109830412A CN201910115489.XA CN201910115489A CN109830412A CN 109830412 A CN109830412 A CN 109830412A CN 201910115489 A CN201910115489 A CN 201910115489A CN 109830412 A CN109830412 A CN 109830412A
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- cathode
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- insulating sleeve
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Abstract
The invention belongs to vacuum electronics technology fields, a kind of novel nano cold-cathode gun is specifically provided, it include: cathode, the first anode, second plate, pedestal, upper insulating sleeve and lower insulating sleeve, cathode is fixedly supported on pedestal by lower insulating sleeve, and second plate is fixedly supported on cathode by upper insulating sleeve；Cathode is the annular metal structure that center position offers reverse frustoconic hollow cavity, and cathode inner surface is provided with circular nano cold cathode emission band；The first anode is fixed on pedestal, is set in the hollow cavity of cathode and is located at hollow cavity center.The present invention replaces hot cathode using field emission cold cathode, cathode uses new construction, both it can guarantee that field emitted electron was not trapped, the purpose for reducing operating voltage can be played again, also guarantee there is sufficiently large emission area to carry out emission current, causes transmitting to be effectively formed this key scientific problems using upper field emitted electron note so that effective solution nanometer cold-cathode material is on the scene.
Description
Technical field
The invention belongs to vacuum electronics technology fields, are related to millimeter wave, THz wave source technology, specifically provide a kind of novel
Nanometer cold-cathode gun.
Background technique
Electrovacuum radiation source device is that modern space communication, radar, electronic countermeasure, controllable thermonuclear fusion device, particle add
The core devices of the electronic systems such as fast device play a very important role to national security and national economy tool.Above-mentioned electrovacuum radiation
Cathode and electron-optical system occupy very important status in the device of source, and traditional devices generally use hot cathode system, pass through
The development of decades, hot cathode technique is highly developed, is widely used in all kinds of electron tubes, but thermal emission cathode exists
Significant disadvantage below: structure is complicated, at high cost, and cathod system is made of various metals and ceramic component, due to hot cathode work
Make the hot environment in thousands of degree, the filament of heating is easily broken off or short circuit in cathode, leads to device failure；In addition, due to
Heating power is needed, the complexity of system is resulted in, reduces the efficiency of system, the long period is needed to can be only achieved work temperature
Degree.
Nano material is as the field emission material haveing excellent performance, and relative to hot-cathode electric source, nanometer cold cathode has
Many advantages, such as reaction speed is fast, high-efficient, size is small, high reliablity；The performance of electron tube can greatly be improved.But it receives
Rice cathode material field emission applications still remain a key scientific problems and not yet solve: effective shape of field emitted electron note
At.Since field emission needs to maintain strong electrical field in cathode surface, leads to gate modulation structure to reduce operating voltage, be necessarily required to
Reduce negative grid spacing to enhance surface field, this just makes field uniformity below gate hole be deteriorated, and field emitted electron easily bombards
Grid, sparking damage, such as Pierce electron gun.
Summary of the invention
It is an object of the invention to for background technique there are the drawbacks of, a kind of new structural nanometer cold cathode electricity is provided
Sub- rifle replaces hot cathode using field emission cold cathode, also, cathode uses new structure, which both can guarantee that field caused hair
Radio is not trapped, and can play the purpose for reducing operating voltage again, it will also ensure that there is sufficiently large emission area
Emission current, so that effective solution nanometer cold-cathode material is on the scene to cause being effectively formed for transmitting application upper field emitted electron note
This key scientific problems.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of novel nano cold-cathode gun, comprising: cathode, the first anode, second plate, pedestal, upper insulating sleeve
And lower insulating sleeve；It is characterized in that,
The cathode is fixedly supported on pedestal by lower insulating sleeve, and the second plate is fixed by upper insulating sleeve
It is supported on cathode；The cathode is the annular metal structure that center position offers hollow cavity, and the hollow cavity is in
Truncated cone-shaped, and cathode inner surface is provided with circular nano cold cathode emission band；The first anode is fixed on pedestal, is set to
In the hollow cavity of cathode and it is located at hollow cavity center.
Further, the second plate is the tubular metal structure that there is electron beam channel in inside.
Further, the first anode is round table-like metal structure.
Further, the second plate is to the inclined skewed surface of cathode direction, and skewed surface close to the end face of cathode
End is provided with semicircular ring metal structure.
The second plate upper end can be tightly connected to form ultra-high vacuum environment with radio frequency system.
It should be understood that the cathode can be formed after rotary table inscribe by a cylinder, the oblique table of inner surface, that is, inscribe
Face.
The beneficial effects of the present invention are:
The present invention provides a kind of novel nano cold-cathode gun, accesses high potential on second plate and the first anode,
Minus earth, under the action of electric field, electronics, which is launched by emission of cathode region towards obliquely downward, to be moved, and arrives horizontal axis position
When, adjust the first anode and second plate voltage, under the influence of a magnetic field so that electronics be close to axis along second plate inside
Electron beam channel travels forward.It is different from conventional magnetron electron gun, electron gun of the present invention does not need near cathode plus magnetic field, pole
The big structure for simplifying entire electron gun, so that fabrication design is more convenient；And it is different from solid linear note electron gun, pass through
The first anode and second plate voltage are effectively adjusted, electron gun of the present invention can be effectively adjusted and be formed by electronics note cross section half
Diameter size, or even forming cross section is solid electron beam, so that electron beam channel needed for device reduces, greatly improves device
Efficiency.
Detailed description of the invention
Fig. 1 is the two-dimensional structure schematic diagram of novel nano cold-cathode gun of the present invention；Wherein: 1 is pedestal, and 2 be first
Anode, 3 be cathode, and 3-1 is circular nano cold cathode emission band, and 4 be second plate, and 5-1 is lower insulating sleeve, and 5-2 is upper exhausted
Edge sleeve.
Fig. 2, Fig. 4 are that (axially and radially respectively symmetrically because of it, this figure takes electron gun of embodiment of the present invention two-dimensional simulation figure
Its top half).
Fig. 3, Fig. 5 are added magnetic field in the embodiment of the present invention with element height change profile schematic diagram.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
The present embodiment provides a kind of novel nano cold-cathode gun, structure is as shown in Figure 1, comprising: cathode, the first sun
Pole, second plate, pedestal, upper insulating sleeve and lower insulating sleeve；The cathode is fixedly supported to pedestal by lower insulating sleeve
On, the second plate is fixedly supported on cathode by upper insulating sleeve；The cathode is that center position offers hollow cavity
The annular metal structure of body, the hollow cavity is in reverse frustoconic, and cathode inner surface is provided with circular nano cold cathode emission
Band；The first anode is fixed on pedestal, is set in the hollow cavity of cathode and is located at hollow cavity center；Institute
Stating second plate is the tubular metal structure that there is electron beam channel in inside；The first anode is round table-like metal structure；It is described
Second plate is to the inclined skewed surface of cathode direction close to the end face of cathode, and skewed surface end is provided with semicircular ring metal knot
Structure.
In the present embodiment, specific size parameter setting is as follows: radius 2.8mm on circular nano cold cathode emission band, bottom half
Diameter 2.95mm, width 0.3mm, cathode end and second plate left end interplanar distance 2.35mm；Cathode end inside radius 3.5mm；
First anode bottom radius 0.2mm, high radius 0.5mm, length 2mm；Electron beam channel radius 2.3mm.Upper and lower insulating sleeve is by 99#
Ceramics are made, and pedestal is made of stainless steel metal.Second plate ground connection, when first anode voltage -3.0KV, cathode voltage -
4.0KV.As shown in figure 3, electronics infuses trajectory diagram, it is hollow beam, Distribution of Magnetic Field figure added by electron gun is as shown in Figure 4.Second
Plus earth, as first anode voltage -5.0KV, cathode voltage -5.1KV.As shown in figure 4, it is cold to obtain novel nano described herein
Cathode electron gun electronics infuses trajectory diagram, and electronics note is close to axis and is moved along electron beam channel, forms solid note, added Distribution of Magnetic Field
Figure is as shown in Figure 5.Compared to the starting time that hot cathode is up to a few minutes, the design cold-cathode gun, which can be realized, quickly to be opened
It is dynamic.It is formed by hollow beam compared to conventional magnetron electron gun, the design electron gun structure can be by adjusting the first sun
Pole, second plate voltage and magnetic field can effectively adjust electronics note radius size, or even realize solid electron beam, so that the design
Electron gun application is more convenient.
The above description is merely a specific embodiment, any feature disclosed in this specification, except non-specifically
Narration, can be replaced by other alternative features that are equivalent or have similar purpose；Disclosed all features or all sides
Method or in the process the step of, other than mutually exclusive feature and/or step, can be combined in any way.
Claims (5)
1. a kind of novel nano cold-cathode gun, comprising: cathode, the first anode, second plate, pedestal, upper insulating sleeve and
Lower insulating sleeve；It is characterized in that,
The cathode is fixedly supported on pedestal by lower insulating sleeve, and the second plate is supported by the way that upper insulating sleeve is fixed
In on cathode；The cathode is the annular metal structure that center position offers hollow cavity, and the hollow cavity is in inverted round stage
Shape, and cathode inner surface is provided with circular nano cold cathode emission band；The first anode is fixed on pedestal, is set to cathode
Hollow cavity in and be located at hollow cavity center.
2. by nanometer cold-cathode gun described in claim 1, which is characterized in that the nanometer cold-cathode gun can generate
Cross section is the hollow or solid electronics note of annular.
3. by nanometer cold-cathode gun described in claim 1, which is characterized in that the first anode is round table-like metal knot
Structure.
4. by nanometer cold-cathode gun described in claim 1, which is characterized in that the second plate is that inside has electronics note logical
The tubular metal structure in road.
5. by nanometer cold-cathode gun described in claim 4, which is characterized in that the second plate is close to the end face of cathode
To the inclined skewed surface of cathode direction, and skewed surface end is provided with semicircular ring metal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910115489.XA CN109830412B (en) | 2019-02-15 | 2019-02-15 | Novel nanometer cold cathode electron gun |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910115489.XA CN109830412B (en) | 2019-02-15 | 2019-02-15 | Novel nanometer cold cathode electron gun |
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| CN109830412A true CN109830412A (en) | 2019-05-31 |
| CN109830412B CN109830412B (en) | 2021-02-05 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082062A (en) * | 2010-12-29 | 2011-06-01 | 清华大学 | Field emission display device |
| CN104319215A (en) * | 2014-11-05 | 2015-01-28 | 东南大学 | Cold cathode electron gun allowing circular plane cathode to correspond to circular-truncated-cone-shaped and column-shaped combination grid hole |
| CN104810225A (en) * | 2015-05-26 | 2015-07-29 | 电子科技大学 | Cold cathode electron source array with external grid and electronic gun formed thereby |
| CN106229246A (en) * | 2016-08-31 | 2016-12-14 | 安徽华东光电技术研究所 | Cold cathode electron gun of vacuum electron magnetron |
| CN107527779A (en) * | 2017-08-18 | 2017-12-29 | 电子科技大学 | One kind is based on spiral shape electronics note cold cathode radiation source |
| CN107591300A (en) * | 2017-08-18 | 2018-01-16 | 电子科技大学 | One kind is based on helical annular electronics note cold cathode radiation source |
| CN109065428A (en) * | 2018-08-16 | 2018-12-21 | 电子科技大学 | A kind of double-gated standard cold-cathode gun and preparation method thereof |
-
2019
- 2019-02-15 CN CN201910115489.XA patent/CN109830412B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082062A (en) * | 2010-12-29 | 2011-06-01 | 清华大学 | Field emission display device |
| CN104319215A (en) * | 2014-11-05 | 2015-01-28 | 东南大学 | Cold cathode electron gun allowing circular plane cathode to correspond to circular-truncated-cone-shaped and column-shaped combination grid hole |
| CN104810225A (en) * | 2015-05-26 | 2015-07-29 | 电子科技大学 | Cold cathode electron source array with external grid and electronic gun formed thereby |
| CN106229246A (en) * | 2016-08-31 | 2016-12-14 | 安徽华东光电技术研究所 | Cold cathode electron gun of vacuum electron magnetron |
| CN107527779A (en) * | 2017-08-18 | 2017-12-29 | 电子科技大学 | One kind is based on spiral shape electronics note cold cathode radiation source |
| CN107591300A (en) * | 2017-08-18 | 2018-01-16 | 电子科技大学 | One kind is based on helical annular electronics note cold cathode radiation source |
| CN109065428A (en) * | 2018-08-16 | 2018-12-21 | 电子科技大学 | A kind of double-gated standard cold-cathode gun and preparation method thereof |
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| CN109830412B (en) | 2021-02-05 |
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