CN204155898U - A kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM - Google Patents
A kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM Download PDFInfo
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- CN204155898U CN204155898U CN201420663687.2U CN201420663687U CN204155898U CN 204155898 U CN204155898 U CN 204155898U CN 201420663687 U CN201420663687 U CN 201420663687U CN 204155898 U CN204155898 U CN 204155898U
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Abstract
The utility model discloses a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM, comprise adopt conductivity high, launch threshold value highly metallic material, and there is the identical cylindrical structural of overall diameter, concentric mutually the cathode rod keeping good electrical to connect, cathode rod transition rings, cathode rod changeover portion, cathode block, cathode column, negative electrode bulb; In the utility model, therefore the breakdown voltage of emission element negative electrode bulb evenly has uniform electron emission density, the many notes cylindrical electron beam launched separately relative its center is symmetric, under suitable guiding magnetic field effect, electron beam rotates around its center the collision being not easy to cause electron beam and drift tube wall in many note drift pipes in transmitting procedure, there is higher efficiency of transmission, in drift tube, the space bit shape of electron beam remains unchanged, and improves bundle ripple conversion efficiency.
Description
Technical field
The utility model relates to the cathode technique field in Pulse Power Techniques, and be specifically related to a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM, the utility model can be applied to the microwave generating system of High-Power Microwave technical field.
Background technology
In Pulse Power Techniques, cathode technique is an important branch, and the energy, quality etc. of negative electrode generation electron beam determine the application prospect of pulse power supply.High-Power Microwave technical field is an important application direction of Pulse Power Techniques.In high-power pulsed ion beams, the electron beam that negative electrode produces and electromagnetic field interact, excitation or amplification microwave signal.Relativistic klystron amplifier (RKA), as a kind of popular high-power pulsed ion beams, has that power is high, efficiency is high, the advantage such as phase place and amplitude stabilization, in high-energy particle accelerator, High power radar, advanced communication system etc., have important application.Along with the raising of operating frequency and the increase of power output, traditional single beam klystron can produce strong space-charge forces when high current works, and then makes Electronic beam focusing difficulty, increase noise and cathode load and reduce device efficiency.Many notes relativistic klystron adopts multiple electron beam parallel operation, can ensure that the perveance of each electron beam is less, thus reducing the space charge effect of electron beam inside, required guiding magnetic field intensity is also lower, can improve the power output of device and obtain higher bundle ripple conversion efficiency.
Many note RKA both domestic and external study mainly based on megawatt magnitude many notes electron beam of hot cathode, because cathode emission capabilities limits makes hot cathode technology be difficult to produce the electron beam of power GW magnitude.Just note with regard to RKA more, adopt cold cathode to have following advantage:
1, hot cathode needs the heating system targets such as heater to be heated to hundreds of to thousands of degree, make cathod system complex structure, and cold cathode does not have particular/special requirement to temperature, gets final product work under room temperature, and structure simply and easily process.
2, hot cathode is high to vacuum level requirements, is generally (10
-6~ 10
-9) Pa, and the requirement of cold cathode to vacuum degree is lower, is generally (10
-2~ 10
-3) Pa.
3, hot cathode emission is low, is generally tens A/cm
2concerning the multiple-beam klystron of a few KA of power GW magnitude electric current, whole cathode emissive area causes greatly whole system bulky dimensions, expense huge (this is also that Stanford has only carried out parameter designing and unfounded reason to system), and cold cathode emission current density can reach a few KA/cm
2, the hundreds of being hot cathode to thousands of times, makes system dimension greatly reduce and expense is very low like this.
4, the many note RKA based on hot cathode need to compress electron beam to be just incorporated in drift tube, higher to the required precision of guiding magnetic field position shape like this and not easily regulate, and do not need to compress electron beam based on many note RKA of cold cathode, Magnetic Field Design is easier to.
Disclose fan-shaped generation and the transmission technology noting INTENSE RELATIVISTIC ELECTRON BEAM of a kind of GW magnitude based on cold cathode in document " generation of fan-shaped many note INTENSE RELATIVISTIC ELECTRON BEAM is studied with transmission " (author Wu Tao etc., are published in " Acta Physica Sinica " the 61st volume the 18th phase in 2012) more.Research finds, noting electron beam more, not only can rotate around its center, also around the central rotation of whole system in hollow drift pipe transmitting procedure fan-shaped; Only rotate centered by self in the fan-shaped drift pipe of many notes.Because harp cathode tip exists stroke field intensity area territory, local in the fan-shaped many note electron beam production processes of experimental result display, the uniformity of therefore launching is very undesirable.When transmitting in the fan-shaped drift pipe of many notes in addition, the fan-shaped electron beam of effect due to external electromagnetic field inevitably rotates around its center, the area that this rotation causes electron beam trace to skim over increases, so not only easily cause the collision of electron beam and drift tube wall, cause electrical losses, affect electron beam transmission efficency, also make the electron beam space bit shape at diverse location place in drift tube different, the mutual effect of impact bundle ripple.
Utility model content
The purpose of this utility model is launched uneven to overcome fan-shaped many note electron beams, and collide with drift tube wall the shortcoming causing electrical losses owing to rotating around self in transmitting procedure, the utility model provides a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM.This negative electrode can produce uniform many note electron beams and realize the high-efficiency transfer in many note drift pipes.
For achieving the above object, the utility model adopts following technical scheme:
Produce a cold cathode for cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM, comprise cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block, cathode column, negative electrode bulb; The outbound course of described cathode rod is provided with boss, and one end of described cathode rod transition rings and cathode rod changeover portion is enclosed within successively on boss; One end of described cathode block is provided with boss, and the boss of cathode block is enclosed within the other end of cathode rod changeover portion; The other end of described cathode block is provided with cathode column, and the end of cathode column is provided with negative electrode bulb.
In technique scheme, described cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block have the identical cylindrical structural of overall diameter.
In technique scheme, described cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block have concentric and inner hollow and connecting as one each other.
In technique scheme, between described cathode rod and cathode rod changeover portion, be provided with several cathode rod transition rings.
In technique scheme, described cathode block surface is provided with screwed hole, and one end of cathode column is connected as one by screw thread and screwed hole.
In technique scheme, described cathode block surface is provided with several screwed holes, and each screwed hole connects a cathode column.
In technique scheme, described cathode column is symmetrically uniformly distributed around cathode block axle center.
In technique scheme, be threaded connection between described cathode column and negative electrode bulb.
Operation principle of the present utility model is: add a negative high-voltage pulse in vacuum environment this many notes cold cathode, electric pulse will along cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block, cathode column transfers to negative electrode bulb, with cathode rod, the negative electrode bulb of comparing such as cathode block is similar to cutting-edge structure, so form the highfield of local at negative electrode bulb outer surface, and bulb is that hemispherical dome structure surface electric field distribution is more even, under the effect of this uniform electric field, whole negative electrode bulb surface will progressively enter explosive emission process, thus form uniform cylindrical electron beam transmitting on each negative electrode bulb surface, and transmit along additional guiding magnetic field.Under the effect of external electromagnetic field E × B, often note electron beam and will produce significantly spin around its center after entering many note drift tubes, due to these many note cylindrical electron beams separately relative its center be symmetric, rotating around self of electronics can not change the area that electron beam trace skims over, namely the collision of electron beam and drift tube wall is avoided, in turn ensure that the unification of electron beam space bit shape in drift tube, there is higher transmission and bundle ripple conversion efficiency.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
In the utility model, therefore the breakdown voltage of emission element negative electrode bulb evenly has uniform electron emission density, the many notes cylindrical electron beam launched separately relative its center is symmetric, under suitable guiding magnetic field effect, electron beam rotates around its center the collision being not easy to cause electron beam and drift tube wall in many note drift pipes in transmitting procedure, there is higher efficiency of transmission, in drift tube, the space bit shape of electron beam remains unchanged, and improves bundle ripple conversion efficiency.
Accompanying drawing explanation
The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the cutaway view of embodiment one of the present utility model;
Fig. 2 is the left view of embodiment one of the present utility model;
Wherein: 1 is cathode rod, 2 is cathode rod transition rings, and 3 is cathode rod changeover portions, and 4 is cathode blocks, and 5 is cathode columns, and 6 is negative electrode bulbs.
Embodiment
As shown in Figure 1, the utility model forms primarily of cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block, cathode column and negative electrode ball first class sections.Cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block are high by conductivity, transmitting threshold value highly metallic material composition, generally adopt stainless steel; In order to ensure the uniformity transmitting electric field, adopting the concentric cylinder body structure of same external diameter, and keeping good electrical to connect.Cathode rod, cathode rod transition rings, cathode rod changeover portion, the inside and outside diameter of cathode block, length is adjustable as required, and the number of cathode rod transition rings is adjustable as required.Cathode block center is the adjustable as required air-vent of size, avoids cathode construction and hides gases affect vacuum stability.Cathode block top outer and central hole are the adjustable as required arc structure of size, avoid cathode block surface and occur local strong electric field region.
As shown in Figures 1 and 2, cathode block top circumference direction is evenly equipped with the internal thread hole of some, and the size of internal thread hole and number are adjustable as required.Cathode column adopts high emission threshold metal material; Bottom is external thread structure, and its thread size and cathode block top internal thread hole match; Top is internal thread or hollow structure.The number of cathode column is adjustable as required.Negative electrode bulb adopts low transmitting threshold value cold-cathode material, and bottom is external screw thread or smooth cylindrical body structure, and size is mated with cathode column top internal thread or hollow structure forms tight fit; Negative electrode bulb top is hemisphere structure, and hemispheroidal size is adjustable as required.
Embodiment 1:
The cylindrical 16 note INTENSE RELATIVISTIC ELECTRON BEAM cold cathode structures of generation as depicted in figs. 1 and 2, cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block are concentric structure, all adopt stainless steel material, and keep good electrical to connect, overall diameter is 54mm.Cathode rod length is 145mm.Cathode rod transition rings length is 50mm, and quantity is 1.Cathode rod transition section length is 235mm; Cathode block length is 45mm, and center has diameter 14mm air-vent, and cathode block top outer arc radius is 15mm, and air-vent place arc radius is 5mm, cathode block top diameter 51mm is circumferentially uniform 16 M2 internal thread holes.Cathode column adopts stainless steel material, and quantity is 16, and overall diameter is 2.1mm, and bottom is M2 external thread structure, and top is smooth cylindrical body structure.Negative electrode bulb adopts graphite material, and quantity is 16, and hemispherical head is of a size of R1.05mm.This structure cathode produces the cylindrical 16 note relativistic electron beams of the strong 5kA of total stream when cathode and anode spacing 1.5cm, applying 600kV potential pulse.Under the effect of 1Tesla guiding magnetic field, after the drift pipe of radius 30mm, electron beam transmission efficency is 80%.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (8)
1. produce a cold cathode for cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM, it is characterized in that comprising cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block, cathode column, negative electrode bulb; The outbound course of described cathode rod is provided with boss, and one end of described cathode rod transition rings and cathode rod changeover portion is enclosed within successively on boss; One end of described cathode block is provided with boss, and the boss of cathode block is enclosed within the other end of cathode rod changeover portion; The other end of described cathode block is provided with cathode column, and the end of cathode column is provided with negative electrode bulb.
2. a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM according to claim 1, is characterized in that described cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block have the identical cylindrical structural of overall diameter.
3. a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM according to claim 2, is characterized in that described cathode rod, cathode rod transition rings, cathode rod changeover portion, cathode block have concentric and inner hollow and connecting as one each other.
4. a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM according to claim 1, is characterized in that being provided with several cathode rod transition rings between described cathode rod and cathode rod changeover portion.
5. a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM according to claim 1, it is characterized in that described cathode block surface is provided with screwed hole, one end of cathode column is connected as one by screw thread and screwed hole.
6. a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM according to claim 5, it is characterized in that described cathode block surface is provided with several screwed holes, each screwed hole connects a cathode column.
7. a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM according to claim 6, is characterized in that described cathode column is symmetrically uniformly distributed around cathode block axle center.
8. a kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM according to claim 1, is characterized in that being threaded connection between described cathode column and negative electrode bulb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420663687.2U CN204155898U (en) | 2014-11-10 | 2014-11-10 | A kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420663687.2U CN204155898U (en) | 2014-11-10 | 2014-11-10 | A kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM |
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| CN204155898U true CN204155898U (en) | 2015-02-11 |
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|---|---|---|---|
| CN201420663687.2U Withdrawn - After Issue CN204155898U (en) | 2014-11-10 | 2014-11-10 | A kind of cold cathode producing cylindrical many note INTENSE RELATIVISTIC ELECTRON BEAM |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332373A (en) * | 2014-11-10 | 2015-02-04 | 中国工程物理研究院应用电子学研究所 | Cold cathode capable of generating multiple cylindrical intense relativistic electron beams |
| CN110189969A (en) * | 2019-06-05 | 2019-08-30 | 中国工程物理研究院激光聚变研究中心 | A kind of magnetically confined pulse broadening imaging system |
| CN114975040A (en) * | 2022-04-29 | 2022-08-30 | 电子科技大学 | Cold cathode-based bidirectional multi-injection multi-cavity cascade amplifier |
-
2014
- 2014-11-10 CN CN201420663687.2U patent/CN204155898U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332373A (en) * | 2014-11-10 | 2015-02-04 | 中国工程物理研究院应用电子学研究所 | Cold cathode capable of generating multiple cylindrical intense relativistic electron beams |
| CN104332373B (en) * | 2014-11-10 | 2016-06-15 | 中国工程物理研究院应用电子学研究所 | A kind of cylinder that produces notes the cold cathode of INTENSE RELATIVISTIC ELECTRON BEAM more |
| CN110189969A (en) * | 2019-06-05 | 2019-08-30 | 中国工程物理研究院激光聚变研究中心 | A kind of magnetically confined pulse broadening imaging system |
| CN110189969B (en) * | 2019-06-05 | 2024-03-22 | 中国工程物理研究院激光聚变研究中心 | Magnetic field constraint pulse broadening imaging system |
| CN114975040A (en) * | 2022-04-29 | 2022-08-30 | 电子科技大学 | Cold cathode-based bidirectional multi-injection multi-cavity cascade amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150211 Effective date of abandoning: 20160615 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |