CN103247500A - Filament for electron gun - Google Patents
Filament for electron gun Download PDFInfo
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- CN103247500A CN103247500A CN2013101531130A CN201310153113A CN103247500A CN 103247500 A CN103247500 A CN 103247500A CN 2013101531130 A CN2013101531130 A CN 2013101531130A CN 201310153113 A CN201310153113 A CN 201310153113A CN 103247500 A CN103247500 A CN 103247500A
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- filament
- electron gun
- emission
- emitting surface
- rhenium
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Abstract
The invention discloses a filament for an electron gun which comprises an emitting surface and fixing feet connected to two ends of the emitting surface, wherein the emitting surface is incense coil-shaped; and the filament is made of rhenium wolfram filament containing 5 percent of rhenium. The filament for the electron gun solves the problem that in the prior art, the service life of the filament of the electron gun of an accelerator is short. The length of the emitting surface is increased via the non-inductive incense coil-shaped emitting surface of the filament, the emitting power of the electronic gun is improved, meanwhile, and the filament adopts a rhenium wolfram filament material, has better high temperature resistant performance, is ion bombardment resistant and high air pressure resistant, does not need to be reactivated after system deflation, is stable in emitting current and long in service life, and improves the overall performance of the accelerator.
Description
Technical field
The present invention relates to a kind of filament, especially related to a kind of used in electron gun filament, belonged to the electric vacuum technology field.
Background technology
Electron gun is one of industrial electronics irradiation accelerator core component, is accelerator effective key in application in industrial production.Electron gun is the electron source of accelerator, requires electron gun can launch enough electronics, drawn by extraction electrode, with accelerating tube coupling, thus obtain certain energy, enough stream by force, focusing performance good electron bundle.The electron gun life-span depends primarily on the filament material of employing, also claims hot cathode material.Adoptable hot cathode material has tungsten filament, thoriatde-tungsten wire, Pengization Lanthanum, rhenium tungsten filament, oxide coated cathode etc. in electron accelerator.What generally use is that tungsten filament is as hot cathode material.Although tungsten cathode can stand the ion bombardment, its electron emission density (0.2-0.3A/ square centimeter), its emission effciency is not high.Heating power height, working temperature up to 2100C °-2600C °, cause sealing leak easily, so that accelerator vacuum degree descends, influence the accelerator operate as normal.Though the working temperature of thoriatde-tungsten wire negative electrode is lower than tungsten cathode, emission density is also higher, its not anti-hyperbar and ion 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, the bombardment of its not anti-hyperbar and ion, and the life-span is not long yet, and existing filament is generally V-type, and its surface of emission is less.
Summary of the invention
Technical problem to be solved by this invention provides 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 solution adopted in the present invention is:
A kind of used in electron gun filament comprises the surface of emission and the fixing feet that is connected 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 invention has the beneficial effects as follows: by the surface of emission of filament being 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-ion bombardment, anti-hyperbar needn't reactivate behind system deflation, emission current is stable, long working life, has improved the overall performance of accelerator.
Description of drawings
Fig. 1 is the vertical view of a kind of used in electron gun filament of the present invention;
Fig. 2 is the end view of a kind of used in electron gun filament of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
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 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 oxides such as Trace Aluminum, potassium, silicon because of it, has than the better high-temperature behavior of tungsten, anti-ion bombardment, anti-hyperbar.Needn't reactivate behind system deflation, emission current is stable, and advantages such as long working life, its service life be up to the several years, thereby has 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 provided by the invention 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.
More than show and described basic principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is by appending claims and equivalent circle thereof.
Claims (4)
1. used in electron gun filament comprises the surface of emission (2) and is connected 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.
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 that contains 5% rhenium.
3. a kind of used in electron gun filament according to claim 1 and 2, it is characterized in that: the length of the described surface of emission (2) is 20mm-40mm.
4. 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 preferably 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101531130A CN103247500A (en) | 2013-04-28 | 2013-04-28 | Filament for electron gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101531130A CN103247500A (en) | 2013-04-28 | 2013-04-28 | Filament for electron gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103247500A true CN103247500A (en) | 2013-08-14 |
Family
ID=48926936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101531130A Pending CN103247500A (en) | 2013-04-28 | 2013-04-28 | Filament for electron gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103247500A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768210A (en) * | 2017-09-04 | 2018-03-06 | 湖北汉光科技股份有限公司 | Large power long life-span cathode heater sub-assembly preparation method |
| CN115985735A (en) * | 2022-12-23 | 2023-04-18 | 核工业理化工程研究院 | Mosquito-repellent incense type filament structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038351A (en) * | 1988-01-12 | 1989-12-27 | 皮莱利通用公司 | Light signal amplifies |
| CN1606631A (en) * | 2001-10-09 | 2005-04-13 | 株式会社东芝 | Tunsten wire, cathode heater, and filament for vibration service lamp |
| US20070183577A1 (en) * | 2006-02-08 | 2007-08-09 | Varian Medical Systems Technologies, Inc. | Cathode structures for X-ray tubes |
| CN101877931A (en) * | 2009-11-12 | 2010-11-03 | 江苏达胜加速器制造有限公司 | Method for preparing non-inductive filament |
| CN102577633A (en) * | 2009-07-08 | 2012-07-11 | 艾可瑞公司 | Interleaving multi-energy X-ray energy operation of a standing wave linear accelerator using electronic switches |
| CN203367208U (en) * | 2013-04-28 | 2013-12-25 | 江苏达胜加速器制造有限公司 | Filament used for electronic gun |
-
2013
- 2013-04-28 CN CN2013101531130A patent/CN103247500A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038351A (en) * | 1988-01-12 | 1989-12-27 | 皮莱利通用公司 | Light signal amplifies |
| CN1606631A (en) * | 2001-10-09 | 2005-04-13 | 株式会社东芝 | Tunsten wire, cathode heater, and filament for vibration service lamp |
| US20070183577A1 (en) * | 2006-02-08 | 2007-08-09 | Varian Medical Systems Technologies, Inc. | Cathode structures for X-ray tubes |
| CN102577633A (en) * | 2009-07-08 | 2012-07-11 | 艾可瑞公司 | Interleaving multi-energy X-ray energy operation of a standing wave linear accelerator using electronic switches |
| CN101877931A (en) * | 2009-11-12 | 2010-11-03 | 江苏达胜加速器制造有限公司 | Method for preparing non-inductive filament |
| CN203367208U (en) * | 2013-04-28 | 2013-12-25 | 江苏达胜加速器制造有限公司 | Filament used for electronic gun |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768210A (en) * | 2017-09-04 | 2018-03-06 | 湖北汉光科技股份有限公司 | Large power long life-span cathode heater sub-assembly preparation method |
| CN107768210B (en) * | 2017-09-04 | 2019-04-26 | 湖北汉光科技股份有限公司 | Large power long service life cathode heater sub-assembly preparation method |
| CN115985735A (en) * | 2022-12-23 | 2023-04-18 | 核工业理化工程研究院 | Mosquito-repellent incense type filament structure |
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Application publication date: 20130814 |