CN203367208U - Filament used for electronic gun - Google Patents
Filament used for electronic gun Download PDFInfo
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- CN203367208U CN203367208U CN 201320223954 CN201320223954U CN203367208U CN 203367208 U CN203367208 U CN 203367208U CN 201320223954 CN201320223954 CN 201320223954 CN 201320223954 U CN201320223954 U CN 201320223954U CN 203367208 U CN203367208 U CN 203367208U
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Abstract
The utility model discloses a filament used for an electronic gun. The filament comprises an emitting surface and fixing pins connected to two ends of the emitting surface. The emitting surface is in an incense coil shape. A material of the filament is a rhenium tungsten filament containing 5% of rhenium. By using the filament of the utility model, a problem that a service life of the electronic gun filament of an accelerator in the prior art is short is solved; the emitting surface of the filament is set to be in the incense coil shape so that a length of the emitting surface is increased and emission power of the electronic gun is increased too; simultaneously, the filament adopting the rhenium tungsten filament material is used so that high temperature performance is good; ion bombardment resistance performance and high atmospheric pressure resistance performance are possessed; after deflation, a system does not need to be re-activated; an emission current is stable and the service life is long; integral performance of the accelerator is increased.
Description
Technical field
The utility model has related to a kind of filament, has especially related to a kind of used in electron gun filament, belongs to the electric vacuum technology field.
Background technology
Electron gun is one of industrial electronic irradiation accelerator core component, is the key that accelerator is effectively applied in industrial production.Electron gun is the electron source of accelerator, requires electron gun can launch enough electronics, by extraction electrode, drawn, with accelerating tube coupling, thus obtain certain energy, enough stream by force, the electron beam that focusing performance is good.The electron gun life-span depends primarily on the filament material of employing, also claims hot cathode material.In electron accelerator, adoptable hot cathode material has tungsten filament, thoriatde-tungsten wire, Pengization Lanthanum, rhenium tungsten filament, oxide coated cathode etc.What generally use is that tungsten filament is as hot cathode material.Although tungsten cathode can stand Ions Bombardment, its electron emission density (0.2-0.3A/ square centimeter), its emission effciency is not high.Heating power is high, and working temperature, up to 2100C °-2600C °, easily causes sealing leak, so that the decline of accelerator vacuum degree, affects the accelerator normal operation.Although the working temperature of thoriatde-tungsten wire negative electrode is lower than tungsten cathode, emission density is also higher, its not anti-hyperbar and Ions Bombardment.The emitting performance of Pengization Lanthanum negative electrode is fine, reach the 20A/ square centimeter in the emission density of 1500C °-1700C °, but useful life is shorter, is unfavorable for the long-term operation continuously of accelerator.Though, and oxide coated cathode has working temperature low, emission density is higher, its not anti-hyperbar and Ions Bombardment, the life-span is not long yet, and existing filament is generally V-type, and its surface of emission is less.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of used in electron gun filament, by the surface of emission being designed to the incense coil shape, has increased emission area, adopts the filament of rhenium tungsten filament material simultaneously, has improved the useful life of filament.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of used in electron gun filament, comprise the surface of emission and the fixing feet that is connected to described surface of emission two ends, and it is characterized in that: the described surface of emission is the incense coil shape.
Aforesaid a kind of used in electron gun filament is characterized in that: the material of described filament is the rhenium tungsten filament that contains 5% rhenium.
Aforesaid a kind of used in electron gun filament is characterized in that: the length of the described surface of emission is 20mm-40mm.
Aforesaid a kind of used in electron gun filament, it is characterized in that: the length of the described surface of emission is preferably 30mm.
The beneficial effects of the utility model are: by the surface of emission by filament, be arranged to noninductive incense coil shape, increased the length of the surface of emission, strengthened the transmitting power of electron gun, adopt the filament of rhenium tungsten filament material simultaneously, have better high-temperature behavior, anti-Ions Bombardment, anti-hyperbar needn't reactivate after system deflation, emission current is stable, long working life, has improved the overall performance of accelerator.
The accompanying drawing explanation
Fig. 1 is the vertical view of a kind of used in electron gun filament of the utility model;
Fig. 2 is the end view of a kind of used in electron gun filament of the utility model.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
As depicted in figs. 1 and 2, a kind of used in electron gun filament, comprise the surface of emission 2 and the fixing feet 1 that is connected to the described surface of emission 2 two ends, the described surface of emission 2 is the incense coil shape, by the surface of emission 2 is arranged to the incense coil shape, thereby increased the length of the surface of emission 2 of filament, than the filament of existing employing V-type, its transmitting power is higher, and emission current is more stable.
The material of filament is the rhenium tungsten filament that contains 5% rhenium, contains the oxides such as Trace Aluminum, potassium, silicon because of it, has than the better high-temperature behavior of tungsten anti-Ions Bombardment, anti-hyperbar.After system deflation, needn't reactivate, emission current is stable, the advantages such as long working life, and its service life is up to the several years, thereby improved the accelerator overall performance.
The length of the surface of emission 2 is 20mm-40mm, through repetition test, and when the length of the surface of emission 2 of discovery filament is 30mm, launching effect the best.
In sum, a kind of used in electron gun filament that the utility model provides, by the surface of emission being designed to the incense coil shape, increased emission area, adopts the filament of rhenium tungsten filament material simultaneously, improved the useful life of filament.
Above demonstration and described basic principle of the present utility model, principal character and advantage.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is by appending claims and equivalent circle thereof.
Claims (3)
1. a used in electron gun filament comprises the surface of emission (2) and is connected to the fixing feet (1) at the described surface of emission (2) two ends that it is characterized in that: the described surface of emission (2) is the incense coil shape, and length is 20mm-40mm.
2. a kind of used in electron gun filament according to claim 1, it is characterized in that: the material of described filament is the rhenium tungsten filament.
3. a kind of used in electron gun filament according to claim 3, it is characterized in that: the length of the described surface of emission (2) is 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320223954 CN203367208U (en) | 2013-04-28 | 2013-04-28 | Filament used for electronic gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320223954 CN203367208U (en) | 2013-04-28 | 2013-04-28 | Filament used for electronic gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203367208U true CN203367208U (en) | 2013-12-25 |
Family
ID=49814931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320223954 Expired - Lifetime CN203367208U (en) | 2013-04-28 | 2013-04-28 | Filament used for electronic gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203367208U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247500A (en) * | 2013-04-28 | 2013-08-14 | 江苏达胜加速器制造有限公司 | Filament for electron gun |
-
2013
- 2013-04-28 CN CN 201320223954 patent/CN203367208U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247500A (en) * | 2013-04-28 | 2013-08-14 | 江苏达胜加速器制造有限公司 | Filament for electron gun |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215214 Jiangsu city of Suzhou province Wujiang FenHu Beishe Community Road No. 1288. Patentee after: CGN DASHENG ELECTRON ACCELERATOR TECHNOLOGY Co.,Ltd. Address before: 215214 Jiangsu city of Suzhou province Wujiang FenHu Beishe Community Road No. 1288. Patentee before: Jiangsu Dasheng Accelerator Manufacturing Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |