CN206451680U - A kind of HCN lasers novel cathode structure - Google Patents
A kind of HCN lasers novel cathode structure Download PDFInfo
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- CN206451680U CN206451680U CN201720143017.1U CN201720143017U CN206451680U CN 206451680 U CN206451680 U CN 206451680U CN 201720143017 U CN201720143017 U CN 201720143017U CN 206451680 U CN206451680 U CN 206451680U
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- cups
- lanthanum hexaboride
- boron nitride
- tantalum
- graphite
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Abstract
The utility model discloses a kind of HCN lasers novel cathode structure, including lanthanum hexaboride a set of cups, lanthanum hexaboride a set of cups is fixed on water-cooled cathode base by graphite and tungsten copper support stick, the tantalum ring on boron nitride matrix is embedded in outside lanthanum hexaboride a set of cups, one end connection tantalum pin heating heating lanthanum of tungsten copper support stick, it is socketed with tungsten copper support stick on boron nitride matrix and graphite, graphite and is socketed ceramics, lanthanum hexaboride a set of cups is made of emission of cathode electronic material.This novel cathode structure is exquisite simple, the fixation problem of tantalum pin and lanthanum hexaboride a set of cups had both been solved using graphite fixture, lanthanum hexaboride a set of cups and tantalum pin, tungsten copper support member, which are kept apart, again prevents contact from chemically reacting, while also having the effect of electrical connection.Tantalum ring has been used outside lanthanum hexaboride a set of cups as heat shielding device, the heat sent during the work of lanthanum hexaboride a set of cups had not only been shielded but also had shielded the boron nitride molecule that the heated boron nitride molecule of boron nitride is diffused into discharge medium gas.
Description
Technical field
The utility model is related to optical technical field, more particularly to a kind of HCN lasers novel cathode structure.
Background technology
In tokamak fusion assay, plasma electron density is an extremely important parameter in experiment, and its is big
It is small to weigh the experimental level of whole device.The density measure of electronics is mainly measured by HCN FIR laser interferometers,
The high-power operation of long-time stable is required as the light source HCN lasers of interferometer system.HCN laser cathode structures are
The important component of HCN lasers, the good and bad stability for determining laser works of its structure, therefore a kind of good negative electrode knot
Structure is significant to interferometer system.The cathode material of current HCN lasers is mainly tantalum, and cathode construction is mainly tantalum cylinder
Find that the life-span of tantalum cathode is unsatisfactory in formula structure, practical application, and usually sparking make it that laser discharge is unstable,
It is even more so under the conditions of heavy-current discharge.Therefore we have selected lanthanum hexaboride a set of cups as a kind of new cathode material, and adopt
With a set of cups hollow type structure that emission area is larger.
Utility model content
Current HCN lasers use tantalum cathode material, and cathode construction, which is mainly in tantalum core structure, practical application, finds tantalum
The life-span of negative electrode is unsatisfactory, and usually sparking make it that laser discharge is unstable, and the utility model mainly solves HCN and swashed
The problem of laser cathode is struck sparks in light device normal work and negative electrode service life problem.
Utility model technical scheme
LaB6 is bluish violet boride ceramics product, is good thermionic emission materials, can be in dismountable vacuum
Used in system, resistance to Ions Bombardment, evaporation rate be low, anti-sputtering, life-span are longer.In order to prevent cathode sparking boron nitride and ceramics
Tungsten copper support stick is kept apart.
The utility model solves the technical scheme that its technical problem used：Tantalum material is instead of using lanthanum hexaboride a set of cups
Material employs the larger a set of cups hollow type structure of emission area as laser cathode emissive material.Its primary structure form
It is that lanthanum hexaboride a set of cups and tantalum pin are fixed on tungsten copper support stick, in order to prevent lanthanum hexaboride a set of cups and tungsten copper rod, tantalum pin hair
It is biochemical reaction using graphite is as fixture and is kept apart, while graphite be good conductor again can be lanthanum hexaboride set
Cup, tantalum pin and electrode are connected, and are the tantalum ring being embedded on boron nitride matrix outside lanthanum hexaboride a set of cups cathode emitter,
It is main to play heat shielding, boron nitride and the main isolation tungsten copper support stick of ceramics and dielectric gas contact sparking influence laser
Stability.
The beneficial effect that the utility model is reached is：This novel cathode structure is exquisite simple, uses graphite fixture
Both the fixation problem of tantalum pin and lanthanum hexaboride a set of cups had been solved, and lanthanum hexaboride a set of cups and tantalum pin, tungsten copper support member had been kept apart
To prevent contact from chemically reacting, while also having the effect of electrical connection.Tantalum ring has been used to make outside lanthanum hexaboride a set of cups
For heat shielding device, the heat sent during the work of lanthanum hexaboride a set of cups was not only shielded but also had shielded the heated boron nitride molecule of boron nitride
It is diffused into the boron nitride molecule in discharge medium gas.Boron nitride and ceramics again isolate dielectric gas and tungsten copper support member simultaneously
Come, it is therefore prevented that tungsten copper support member is in laser works and dielectric gas sparking causes laser works unstable.Using
The problem of both solving cathode sparking after novel cathode mechanism, again greatly prolongs the service life of negative electrode.
Brief description of the drawings
Accompanying drawing is used for providing further understanding to of the present utility model, and constitutes a part for specification, with this practicality
New embodiment is used to explain the utility model together, does not constitute to limitation of the present utility model.
In the accompanying drawings：
Fig. 1 is overall structure diagram of the present utility model；
Label in figure：1st, tantalum pin heating heating lanthanum；2nd, boron nitride matrix；3rd, it is ceramic；4th, lanthanum hexaboride a set of cups；5th, tungsten copper branch
Support rod；6th, graphite；7th, tantalum ring.
Embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
Embodiment：As shown in figure 1, the utility model provides a kind of HCN lasers novel cathode structure, including lanthanum hexaboride
A set of cups 4, lanthanum hexaboride a set of cups 4 is fixed on water-cooled cathode base by graphite 6 and tungsten copper support stick 5, outside lanthanum hexaboride a set of cups 4
Face is embedded in the tantalum ring 7 on boron nitride matrix 2, one end connection tantalum pin heating heating lanthanum 1 of tungsten copper support stick 5, tungsten copper support stick 5
On be socketed with boron nitride matrix 2 and graphite 6, graphite 6 be socketed ceramics 3.
Lanthanum hexaboride a set of cups 4 is made of emission of cathode electronic material, and signal, which can be stablized, punctures dielectric gas.
When in use, the 1 tantalum pin heating connected first with electrode when laser normal work heats 4 six to the utility model
Lanthanum boride a set of cups, when 4 lanthanum hexaboride a set of cups reach certain temperature, launching electronics puncture dielectric gas, and laser is lighted.When six
Substantial amounts of heat can be also produced during lanthanum boride a set of cups launching electronics, these heats are mainly masked by 7 tantalum rings, the heat one of shielding
Aspect can heat lanthanum hexaboride a set of cups again, on the other hand 2 boron nitride overheat can be avoided boron nitride molecule is diffused into gas again
Electric discharge is influenceed in body medium.What therefore this novel cathode structure can make HCN laser long-time stables is operated in high power
State, high-quality diagnostic signal is provided for HCN laser interferometer.
The beneficial effect that the utility model is reached is：This novel cathode structure is exquisite simple, uses graphite fixture
Both the fixation problem of tantalum pin and lanthanum hexaboride a set of cups had been solved, and lanthanum hexaboride a set of cups and tantalum pin, tungsten copper support member had been kept apart
To prevent contact from chemically reacting, while also having the effect of electrical connection.Tantalum ring has been used to make outside lanthanum hexaboride a set of cups
For heat shielding device, the heat sent during the work of lanthanum hexaboride a set of cups was not only shielded but also had shielded the heated boron nitride molecule of boron nitride
It is diffused into the boron nitride molecule in discharge medium gas.Boron nitride and ceramics again isolate dielectric gas and tungsten copper support member simultaneously
Come, it is therefore prevented that tungsten copper support member is in laser works and dielectric gas sparking causes laser works unstable.Using
The problem of both solving cathode sparking after novel cathode mechanism, again greatly prolongs the service life of negative electrode.
Finally it should be noted that：Preferred embodiment of the present utility model is these are only, this practicality is not limited to
It is new, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art,
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement.It is all it is of the present utility model spirit and principle within, any modification, equivalent substitution and improvements made etc. all should be included
Within protection domain of the present utility model.
Claims (2)
1. a kind of HCN lasers novel cathode structure, it is characterised in that including lanthanum hexaboride a set of cups (4), the lanthanum hexaboride set
Cup (4) is fixed on water-cooled cathode base by graphite (6) and tungsten copper support stick (5), is inlayed outside the lanthanum hexaboride a set of cups (4)
It is embedded in the tantalum ring (7) on boron nitride matrix (2), one end connection tantalum pin heating heating lanthanum (1) of the tungsten copper support stick (5), institute
State and boron nitride matrix (2) and graphite (6) are socketed with tungsten copper support stick (5), be socketed on the graphite (6) ceramic (3).
2. a kind of HCN lasers novel cathode structure according to claim 1, it is characterised in that the lanthanum hexaboride set
Cup (4) is made of emission of cathode electronic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720143017.1U CN206451680U (en) | 2017-02-17 | 2017-02-17 | A kind of HCN lasers novel cathode structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720143017.1U CN206451680U (en) | 2017-02-17 | 2017-02-17 | A kind of HCN lasers novel cathode structure |
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| Publication Number | Publication Date |
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| CN206451680U true CN206451680U (en) | 2017-08-29 |
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| CN201720143017.1U Active CN206451680U (en) | 2017-02-17 | 2017-02-17 | A kind of HCN lasers novel cathode structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779646A (en) * | 2020-06-18 | 2020-10-16 | 北京控制工程研究所 | Lanthanum hexaboride hollow cathode based on tungsten-rhenium heating wire and tungsten top welding structure |
-
2017
- 2017-02-17 CN CN201720143017.1U patent/CN206451680U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779646A (en) * | 2020-06-18 | 2020-10-16 | 北京控制工程研究所 | Lanthanum hexaboride hollow cathode based on tungsten-rhenium heating wire and tungsten top welding structure |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191009 Address after: 230000 Room 801, C1 Building, Innovation Industrial Park, 800 Wangjiangxi Road, Hefei High-tech Zone, Anhui Province Patentee after: Anhui Zhongke Touwei Photoelectric Technology Co., Ltd. Address before: The dawn of Baohe District of Hefei city Anhui province 230000 Road No. 69 King Garden 6 Building 502 room Patentee before: Hefei Ming Guang Photoelectric Technology Co., Ltd. |
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| TR01 | Transfer of patent right |