CN103367082A - An electronoc emitter for an X-ray tube and an X-ray containing the same - Google Patents
An electronoc emitter for an X-ray tube and an X-ray containing the same Download PDFInfo
- Publication number
- CN103367082A CN103367082A CN2013101167784A CN201310116778A CN103367082A CN 103367082 A CN103367082 A CN 103367082A CN 2013101167784 A CN2013101167784 A CN 2013101167784A CN 201310116778 A CN201310116778 A CN 201310116778A CN 103367082 A CN103367082 A CN 103367082A
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- China
- Prior art keywords
- emitter
- ray tube
- conductor
- ray
- electron emitter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/16—Cathodes heated directly by an electric current characterised by the shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/06—Cathodes
- H01J35/064—Details of the emitter, e.g. material or structure
Abstract
The invention relates to an electronic emitter (16) for an X-ray tube (10). The electronic emitter (16) comprises a flat current-carrying conductor (20) for the emission of thermal electrons (e-) and a V-shaped zigzag structure.
Description
Technical field
The present invention relates to a kind of electron emitter for X-ray tube, this electron emitter is made of the conductor that is used for thermionic emission flat, energising.The invention still further relates to a kind of X-ray tube with this electron emitter.
Background technology
For the so-called flat emitter of known use from DE2727907C2 for example of thermionic emission in X-ray tube, this flat emitter forms for lath recess, that materials with high melting point is made of introducing by alternately being provided with top-cross opposite each other, therefore, the energising ribbon conductor that forms by this way has back-shaped structure.Thisly represent with the form in vertical view or vertical section among Fig. 1 and 2 from electron emission body well known in the prior art.Introduce generally recess in the lamellar 2 of the thickness d that is formed by tungsten W or breach 4 this be rectangle and width a be about ten microns to the hundreds of micron.Distance between the breach 4 is designed at this, and the resistance relevant with width b with material, the thickness d of the ribbon conductor 6 that forms by breach is enough high in order to improve in this wise temperature by the electric current in the predetermined voltage current downflow, so that thermionic emission occurs.
But this electron emitter is high by heating and cooling stage heat load, so it must be changed after the shorter life-span.
Summary of the invention
Therefore, technical problem to be solved by this invention is, a kind of electronic emitter for X-ray tube is provided, and this electronic emitter is made of the flat electrical conductor that is used for thermionic emission, the Service life of this conductor and must correspondingly less changing.In addition, technical problem to be solved by this invention provides a kind of X-ray tube with this electron emitter.
With regard to electron emitter, technical problem of the present invention solves by a kind of electron emitter for X-ray tube.By the present invention, electronic emitter comprises flat electrical conductor, and this conductor has the curved structure of V-arrangement.In other words, breach or the recess of introducing ribbon conductor have v-shaped structure, and court widens for the manufacture of the edge of the lath of this conductor.
Can produce the particle flux of free electron when the identical external dimensions by this structure, this particle flux is the same large with the particle flux that is produced by the known electron emitter of prior art in practice, and wherein, the while has obviously improved the life-span.
The present invention based on following understanding, can form short circuit owing to depending on the length prolongation or the shortening that obtain when heating or cooling in the adjacent ribbon conductor of complications, so cause by the known electron emission body life time of prior art short at this.By being formed on by V-notch provided by the invention between the ribbon conductor towards lateral edges increasing distance or gap, this distance or gap obviously reduce the risk of short circuit between the ribbon conductor that appears on the outward flange.Herein in practice, when until the edge a little widen tens microns, and other sizes have obtained to improve nine times life-span when keeping identical.Demonstrate in addition, the emission section of electronics is not affected by the curved structure of this V-arrangement in practice, because the fringe region of recess can not help electric current to carry and so electron emission in practice.
The concept " V-arrangement " of using in this application is interpreted as the structure similar to " V " at this.Therefore " V " arm needn't extend by straight line, also needn't overlap in the summit.Principal character is that breach is widened towards lateral edges.
Description of drawings
Characteristic, the feature and advantage that the present invention is above-mentioned and the mode that how to realize them and method are in conjunction with clearer and clear and definite in conjunction with the following example explanation relevant with accompanying drawing.
The embodiment that describes with reference to the accompanying drawings for other explanation of the present invention.In the accompanying drawing:
Fig. 1 and Fig. 2 are partial top view and the longitudinal sections of electronic emitter well known in the prior art.
Fig. 3 is the schematic diagram by X-ray tube of the present invention,
Fig. 4 and Fig. 5 are by electron emitter of the present invention simple partial top view and longitudinal section.
Embodiment
Press Fig. 3, X-ray tube 10 comprises housing 12, is provided with anode opposite each other 14 and electron emitter 16 in this housing 12.Have a high pressure between anode 14 and electron emitter 16, make the electronics that penetrates from electron emitter accelerate and produce gamma-rays in this X ray towards anode 14 by this high pressure, this gamma-rays is discharged by the window 18 that is arranged in housing 12.
Fig. 4 and Fig. 5 illustrate the enlarged drawing by X ray reflector of the present invention.The X ray reflector comprises conductor 20 flat, energising, and the ribbon conductor 22 of this conductor has the curved structure of V-arrangement.This curved structure produces by recess or the breach 24 of V-arrangement, and this recess or breach 24 originate in edge 26 and widen by cutting with laser or line in little processing introducing lath and towards the edge 26 of lath.Breach 24 is like this moulding correspondingly so that its at the width a1 on the edge 26 greater than the width on the breach interior substrate.For example, the difference between a1 and the a2 is tens microns.Ribbon conductor 22 adjacent arms 28 interconnect by the substrate 30 of extending between arm 28 point-blank at this.In the preferred form of implementation shown in the Figure 4 and 5, also provide the arm 28 linearly extended sides of V-notch 24 linearly extended arms and ribbon conductor 22.
In the embodiment of this figure, also be provided with two such ribbon conductors 22 that are arranged side by side, this ribbon conductor 22 can be made by a unique lath by little processing equally.
Although at length further specify and described the present invention by preferred embodiment, the present invention is not limited to disclosed embodiment, and those skilled in the art can therefrom derive other modification, only otherwise exceeding protection scope of the present invention gets final product.
Claims (5)
1. that electron emitter (16) that is used for X-ray tube (10), this electron emitter have is flat, energising be used for hot electron (e
-) emission conductor (20), this conductor (20) has the curved structure of V-arrangement.
2. by electron emitter claimed in claim 1 (16), wherein, described conductor (20) consists of by the lath that is provided with V-notch (24).
3. by claim 1 or 2 described electron emitters (16), wherein, described curved structure arm (28) adjacent one another are interconnects by linearly extended substrate (30) between described arm.
4. by claim 1,2 or 3 described electron emitters (16), wherein, two ribbon conductors that are arranged side by side (22) design has the curved structure of V-arrangement.
5. an X-ray tube (10), it has by the described electron emitter of one of aforementioned claim (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210205715 DE102012205715A1 (en) | 2012-04-05 | 2012-04-05 | Electron emitter i.e. flat emitter, for use in X-ray tube for thermal emission of electrons, has flat, current-carrying conductor including V-shaped meander structure and formed by metal strips provided with V-shaped recesses |
| DE102012205715.3 | 2012-04-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103367082A true CN103367082A (en) | 2013-10-23 |
| CN103367082B CN103367082B (en) | 2016-06-08 |
Family
ID=49209964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310116778.4A Active CN103367082B (en) | 2012-04-05 | 2013-04-07 | The electron emitter of X-ray tube and the X-ray tube with this electron emitter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103367082B (en) |
| DE (1) | DE102012205715A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105849851A (en) * | 2013-10-29 | 2016-08-10 | 瓦里安医疗系统公司 | X-ray tube having planar emitter with tunable emission characteristics and magnetic steering and focusing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3788721A (en) * | 1970-12-15 | 1974-01-29 | Thorn Electrical Ind Ltd | Electrically conductive components |
| US6646366B2 (en) * | 2001-07-24 | 2003-11-11 | Siemens Aktiengesellschaft | Directly heated thermionic flat emitter |
| CN101443876A (en) * | 2006-05-11 | 2009-05-27 | 皇家飞利浦电子股份有限公司 | Emitter design including emergency operation mode in case of emitter-damage for medical x-ray application |
| US20090323898A1 (en) * | 2008-06-30 | 2009-12-31 | Varian Medical Systems, Inc. | Thermionic emitter designed to control electron beam current profile in two dimensions |
| CN101779265A (en) * | 2007-07-24 | 2010-07-14 | 皇家飞利浦电子股份有限公司 | Thermionic electron emitter, method for preparing same and x-ray source including same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2727907A1 (en) | 1977-06-21 | 1979-01-18 | Siemens Ag | X-ray tube glow cathode |
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2012
- 2012-04-05 DE DE201210205715 patent/DE102012205715A1/en active Pending
-
2013
- 2013-04-07 CN CN201310116778.4A patent/CN103367082B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3788721A (en) * | 1970-12-15 | 1974-01-29 | Thorn Electrical Ind Ltd | Electrically conductive components |
| US6646366B2 (en) * | 2001-07-24 | 2003-11-11 | Siemens Aktiengesellschaft | Directly heated thermionic flat emitter |
| CN101443876A (en) * | 2006-05-11 | 2009-05-27 | 皇家飞利浦电子股份有限公司 | Emitter design including emergency operation mode in case of emitter-damage for medical x-ray application |
| CN101779265A (en) * | 2007-07-24 | 2010-07-14 | 皇家飞利浦电子股份有限公司 | Thermionic electron emitter, method for preparing same and x-ray source including same |
| US20090323898A1 (en) * | 2008-06-30 | 2009-12-31 | Varian Medical Systems, Inc. | Thermionic emitter designed to control electron beam current profile in two dimensions |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105849851A (en) * | 2013-10-29 | 2016-08-10 | 瓦里安医疗系统公司 | X-ray tube having planar emitter with tunable emission characteristics and magnetic steering and focusing |
| CN105849851B (en) * | 2013-10-29 | 2017-10-24 | 万睿视影像有限公司 | Transmitting feature can adjust and magnetic manipulation and the X-ray tube with flat emitters focused on |
| US10269529B2 (en) | 2013-10-29 | 2019-04-23 | Varex Imaging Corporation | Method of designing X-ray tube having planar emitter with tunable emission characteristics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103367082B (en) | 2016-06-08 |
| DE102012205715A1 (en) | 2013-10-10 |
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Effective date of registration: 20220128 Address after: Erlangen Patentee after: Siemens Healthineers AG Address before: Munich, Germany Patentee before: SIEMENS AG |
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| TR01 | Transfer of patent right |