CN107946157A - The microwave frequency micromatic setting and coaxial manetron of a kind of coaxial manetron - Google Patents
The microwave frequency micromatic setting and coaxial manetron of a kind of coaxial manetron Download PDFInfo
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- CN107946157A CN107946157A CN201711496191.5A CN201711496191A CN107946157A CN 107946157 A CN107946157 A CN 107946157A CN 201711496191 A CN201711496191 A CN 201711496191A CN 107946157 A CN107946157 A CN 107946157A
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- coaxial
- manetron
- coaxial manetron
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- microwave frequency
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 description 7
- 230000005684 electric field Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/18—Resonators
- H01J23/20—Cavity resonators; Adjustment or tuning thereof
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- Particle Accelerators (AREA)
Abstract
The present invention discloses the microwave frequency micromatic setting and coaxial manetron of a kind of coaxial manetron, the microwave frequency micromatic setting of coaxial manetron includes supporting item and the drive link with the coaxial setting of coaxial manetron, plastic deformation part, drive plate and frequency modulation ring, supporting item combines the shell for being fixed on coaxial manetron, the both ends of plastic deformation part are respectively in connection with being fixed on supporting item and drive plate, the bottom surface of drive link combines the top surface for being fixed on drive plate, the top surface of frequency modulation ring combines and is fixed with multiple circumferentially uniformly distributed connecting rods, the top surface of connecting rod combines the bottom surface for being fixed on drive plate；Frequency modulation ring is located in the exocoel of coaxial manetron, and the fine setting to coaxial manetron microwave frequency is realized by the displacement along inner cavity axial direction under the drive of drive link.The present invention can be realized accurately to coaxial manetron, especially the fine setting to the microwave frequency of C-band coaxial manetron.
Description
Technical field
The present invention relates to vacuum electron device technical field.More particularly, to a kind of microwave frequency of coaxial manetron
Micromatic setting and coaxial manetron.
Background technology
Magnetron is a kind of vacuum electronic oscillator, it is used to the electric energy in power supply be converted into microwave energy.Magnetic control pipe
There is the characteristics of power is big, small, cost is low, therefore, the microwave source being commonly used in medical linac.
At present, domestic medical linac is concentrated mainly on S-band (2856MHz), exports pulse power about 2.6 million
Watt.In order to meet Medical Instruments miniaturization and the needs of precisely treating, the developing direction of medical linac is C-band
(5700MHz) and X-band (9300MHz), and require microwave frequency to be adjusted (within 20MHz) in the range of very little.
It is lost greatly when can be applied to the non-coaxial magnetron of S-band linear accelerator due to high-frequency work, efficiency is low, cannot be applicable in
In C-band linear accelerator, therefore C-band linear accelerator generally use coaxial manetron.
Existing coaxial manetron includes cathode, is formed at the inner cavity of cathode external and is formed at the exocoel of lumen outer,
Usually it is additionally provided with frequency modulation device.Existing frequency modulation device is mainly realized by the way of drive link complexed metal piston, passes through biography
Lever drives the metallic piston being placed in exocoel to move up and down to adjust the microwave frequency of coaxial manetron.But metallic piston
Micro-displacement can cause the frequency displacement stepping of coaxial manetron excessive, for example, metallic piston moves down in C-band coaxial manetron
0.1mm can cause the microwave frequency of coaxial manetron to raise about 30MHz.However, C-band linear accelerator is to C-band coaxial magnetic
The requirement of keyholed back plate frequency displacement precision is less than 20MHz, and existing frequency modulation device cannot meet that C-band linear accelerator is same to C-band
The requirement of axis magnetron.
Accordingly, it is desirable to provide one kind can be realized accurately to coaxial manetron, the especially microwave to C-band coaxial manetron
The microwave frequency micromatic setting and coaxial manetron for the coaxial manetron that frequency is finely adjusted.
The content of the invention
It is an object of the invention to provide one kind can accurately realize to coaxial manetron, especially to the coaxial magnetic control of C-band
The microwave frequency micromatic setting and coaxial manetron for the coaxial manetron that the microwave frequency of pipe is finely adjusted.
To reach above-mentioned purpose, the present invention uses following technical proposals：
First aspect present invention provides a kind of microwave frequency micromatic setting of coaxial manetron, including supporting item and with it is coaxial
Drive link, plastic deformation part, drive plate and the frequency modulation ring that the coaxial of magnetron is set, the supporting item, which combines, to be fixed on together
The shell of axis magnetron, the both ends of the plastic deformation part are described respectively in connection with being fixed on the supporting item and the drive plate
The bottom surface of drive link is fixed with multiple circumferential directions and is evenly distributed with reference to the top surface for being fixed on the drive plate, the top surface combination of the frequency modulation ring
Connecting rod, the top surface of the connecting rod is with reference to the bottom surface for being fixed on the drive plate；The frequency modulation ring is located at coaxial manetron
Exocoel in, by under the drive of the drive link along inner cavity axial direction displacement realize to the micro- of coaxial manetron microwave frequency
Adjust.
When carrying out the fine setting of coaxial manetron microwave frequency, it is set to drive frequency modulation ring to drive link force along inner cavity is axial
It is axially moved along inner cavity, when stopping exerting a force since the plasticity of plastic deformation part causes position of the frequency modulation ring in exocoel to fix.
In this way, by exerting a force to drive link frequency modulation ring can be driven axially to realize displacement along inner cavity, position of the frequency modulation ring in exocoel more connects
The microwave frequency of the lower part coaxial manetron of nearly exocoel is higher, and position of the frequency modulation ring in exocoel is same closer to the top of exocoel
The microwave frequency of axis magnetron is lower.The microwave frequency micromatic setting of the coaxial manetron provided by first aspect present invention
Precision Machining and assembling, it can be achieved that frequency modulation ring is in along the shift value and the change value of coaxial manetron microwave frequency of inner cavity axial direction
Linear relationship, frequency modulation ring often move down 0.1mm, and it is about 2MHz that coaxial manetron microwave frequency, which rises, can reach C-band straight line
Ten times to C-band coaxial manetron frequency displacement required precision of accelerator.
Preferably, the plastic deformation part is metal bellows, and the drive link is located at close to the part of the drive plate
In the tube chamber of the metal bellows.
Preferably, the thickness of the frequency modulation ring is 6-10mm.The beneficial effect that such a structure is brought is：Due to magnetron
Output power be about 2MW-3MW, power is very high, therefore too thin spark phenomenon cannot occurs in the thickness of frequency modulation ring, therefore adjusts
The thickness of frequency ring is preferably 6-10mm, is most preferably 8mm.
Preferably, the number of the connecting rod is 3, and 3 connecting rods can ensure the stability of frequency modulation ring displacement.
Preferably, the material of the drive link, plastic deformation part, drive plate and connecting rod is stainless steel, the frequency modulation
The material of ring is oxygen-free copper.The beneficial effect that the selection of such a material is brought is：Frequency modulation ring produces in the high-frequency electric field of exocoel
Raw heat can pass sequentially through connecting rod, drive plate and drive link and shed, and strengthen thermal diffusivity.
Preferably, the frequency modulation ring is located at the position of top and close inner cavity in the exocoel of coaxial manetron.Such a structure
The beneficial effect brought is：High-frequency electric field in coaxial manetron exocoel is mainly TE011 patterns, and high-frequency electric field is with inner chamber body
It is distributed for axle center in circular, the field strength in exocoel at luminal border is minimum, therefore frequency modulation ring ring is located at coaxial manetron
Exocoel in top and close to inner cavity position, further can accurately realize the fine setting to the microwave frequency of coaxial manetron.
Preferably, the both ends of the plastic deformation part are respectively welded in the supporting item and the drive plate, the transmission
The bottom surface of bar is welded in the top surface of the drive plate, and the top surface of the frequency modulation ring is welded with multiple circumferentially uniformly distributed connecting rods, institute
The top surface for stating connecting rod is welded in the bottom surface of the drive plate.
Preferably, the supporting item is welded in the shell of coaxial manetron or is integrally formed with the shell of coaxial manetron.
A kind of coaxial manetron of second aspect of the present invention offer, including the coaxial manetron of first aspect present invention offer
Microwave frequency micromatic setting.
Preferably, the coaxial manetron that second aspect of the present invention provides is C-band coaxial manetron.That is, by the present invention the
On the one hand the microwave frequency micromatic setting of the coaxial manetron provided is applied to C-band coaxial manetron, so can fully realize
The microwave frequency micromatic setting for the coaxial manetron that first aspect present invention provides can carry out the microwave frequency of coaxial manetron
The advantage accurately finely tuned.
Beneficial effects of the present invention are as follows：
Technical solution of the present invention can be realized accurately to coaxial manetron, especially to the micro- of C-band coaxial manetron
Wave frequency rate is finely adjusted, and can meet requirement of the C-band linear accelerator to C-band coaxial manetron frequency displacement precision.
Brief description of the drawings
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings；
Fig. 1 shows the diagrammatic cross-section of the microwave frequency micromatic setting of coaxial manetron.
Fig. 2 shows frequency modulation ring and the schematic diagram of connecting rod.
Embodiment
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
As Fig. 1 and Fig. 2 are jointly shown, An embodiment provides a kind of microwave frequency of coaxial manetron is micro-
Adjust device, including supporting item 8 and the drive link 7, plastic deformation part 6, the drive plate 5 that are coaxially disposed with the inner cavity 2 of coaxial manetron
With frequency modulation ring 3, supporting item 8, which combines, is fixed on the shell of coaxial manetron, and the both ends of plastic deformation part 6 are respectively in connection with being fixed on branch
Support member 8 and drive plate 5, the bottom surface of drive link 7 are more with reference to being fixed with reference to the top surface for being fixed on drive plate 5, the top surface of frequency modulation ring 3
A circumferentially uniformly distributed connecting rod 4, the top surface of connecting rod 4 combine the bottom surface for being fixed on drive plate 5；Frequency modulation ring 3 is located at coaxial magnetic control
In the exocoel 1 of pipe, by being realized under the drive of drive link 7 along the axial displacement in inner cavity 2 to coaxial manetron microwave frequency
Fine setting.
When carrying out the fine setting of coaxial manetron microwave frequency, it is set to drive frequency modulation to the force of drive link 7 along inner cavity 2 is axial
Ring 3 is axially moved along inner cavity 2, when stopping exerting a force since the plasticity of plastic deformation part 6 causes position of the frequency modulation ring 3 in exocoel 1
Put fixation.In this way, by exerting a force to drive link 7 frequency modulation ring 3 can be driven to realize displacement along inner cavity 2 is axial, frequency modulation ring 3 is in exocoel 1
In position it is higher closer to the microwave frequency of the lower part coaxial manetron of exocoel 1, position of the frequency modulation ring 3 in exocoel 1 is got over
Microwave frequency close to the top coaxial manetron of exocoel 1 is lower.The coaxial manetron provided by first aspect present invention
Microwave frequency micromatic setting Precision Machining and assembling, it can be achieved that frequency modulation ring 3 along the axial shift value in inner cavity 2 and coaxial magnetic control
The change value of pipe microwave frequency is in a linear relationship, and frequency modulation ring 3 often moves down 0.1mm, and coaxial manetron microwave frequency rises about
For 2MHz, C-band linear accelerator is can reach to ten times of C-band coaxial manetron frequency displacement required precision.Wherein, drive link 7,
Plastic deformation part 6, drive plate 5 and frequency modulation ring 3 be coaxially disposed with the inner cavity 2 of coaxial manetron may be such that along inner cavity 2 it is axial to
Frequency modulation ring 3 is more accurate along the axial displacement in inner cavity 2 when drive link 7 exerts a force.In addition, it will be understood by those skilled in the art that：
Drive link 7 is coaxial with drive plate 5 and the bottom surface of drive link 7 is combined the top surface for being fixed on drive plate 5, it is meant that the bottom of drive link 7
Face center combines the end face center for being fixed on drive plate 5；And the top surface of frequency modulation ring 3 combines and is fixed with multiple circumferentially uniformly distributed connections
Bar 4 means between adjacent connecting rod 4 that equidistantly therefore, the structure of this stabilization causes regulation ring under sharp pounding, its end
Face still can keep horizontality (if original state is horizontality), it is ensured that the precision of fine setting.
In the specific implementation, plastic deformation part 6 is specially metal bellows, and drive link 7 is located at close to the part of drive plate 5
In the tube chamber of metal bellows.
In the specific implementation, the thickness of frequency modulation ring 3 is arranged to 6-10mm.The beneficial effect that such a structure is brought is：By
It is about 2MW-3MW in the output power of magnetron, power is very high, therefore the thickness of frequency modulation ring 3 too thin cannot occur that sparking is existing
As, therefore the thickness of frequency modulation ring 3 is preferably 6-10mm, is most preferably 8mm.
In the specific implementation, the number of connecting rod 4 is 3, and 3 connecting rods 4 can ensure the stabilization of 3 displacement of frequency modulation ring
Property.
In the specific implementation, the material of drive link 7, plastic deformation part 6, drive plate 5 and connecting rod 4 is stainless steel, is adjusted
The material of frequency ring 3 is oxygen-free copper.The beneficial effect that the selection of such a material is brought is：High-frequency electric field of the frequency modulation ring 3 in exocoel 1
The heat of middle generation can pass sequentially through connecting rod 4, drive plate 5 and drive link 7 and shed, and strengthen thermal diffusivity.
In the specific implementation, frequency modulation ring 3 is located at the position of top and close inner cavity 2 in the exocoel 1 of coaxial manetron.It is such a
The beneficial effect that structure is brought is：High-frequency electric field in coaxial manetron exocoel 1 is mainly TE011 patterns, high-frequency electric field with
2 body of inner cavity is distributed for axle center in circular, and the field strength in exocoel 1 close to 2 boundary of inner cavity is minimum, therefore 3 ring of frequency modulation ring is located at
The position of top and close inner cavity 2 in the exocoel 1 of coaxial manetron, further can accurately realize the microwave to coaxial manetron
The fine setting of frequency.
In the specific implementation, the both ends of plastic deformation part 6 are respectively welded in supporting item 8 and drive plate 5, the bottom of drive link 7
Face is welded in the top surface of drive plate 5, and the top surface of frequency modulation ring 3 is welded with multiple circumferentially uniformly distributed connecting rods 4, the top surface of connecting rod 4
It is welded in the bottom surface of drive plate 5.
In the specific implementation, supporting item 8 be welded in coaxial manetron shell or with the shell of coaxial manetron one into
Type.
An alternative embodiment of the invention provides a kind of coaxial manetron, including the coaxial magnetic control that above-described embodiment provides
The microwave frequency micromatic setting of pipe, the coaxial manetron is C-band coaxial manetron in the specific implementation.That is, by above-mentioned implementation
The microwave frequency micromatic setting for the coaxial manetron that example provides is applied to C-band coaxial manetron, so can fully realize above-mentioned
The microwave frequency micromatic setting for the coaxial manetron that embodiment provides can carry out the microwave frequency of coaxial manetron accurately micro-
The advantage of tune.
In the description of the present invention, it is necessary to which the orientation of the instruction such as explanation, term " on ", " under " or position relationship are base
In orientation shown in the drawings or position relationship, description description of the invention and simplified, rather than instruction or hint are for only for ease of
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of invention.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " should be interpreted broadly, example
Such as, can be fixedly connected or be detachably connected, or be integrally connected；Can mechanically connect or be electrically connected
Connect；It can be directly connected, can also be indirectly connected by intermediary, can be the connection inside two elements.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
It should also be noted that, in the description of the present invention, relational terms such as first and second and the like are only used
To distinguish one entity or operation from another entity or operation, without necessarily requiring or implying these entities or
There are any actual relationship or order between operation.Moreover, term " comprising ", "comprising" or its any other change
Body is intended to non-exclusive inclusion, so that process, method, article or equipment including a series of elements are not only wrapped
Those key elements are included, but also including other elements that are not explicitly listed, or further include as this process, method, article
Or the key element that equipment is intrinsic.In the absence of more restrictions, the key element limited by sentence "including a ...", and
It is not precluded within the process including the key element, method, article or equipment that also there are other identical element.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention, for those of ordinary skill in the art, on the basis of the above description can be with
Make other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to the present invention
The obvious changes or variations extended out of technical solution still in protection scope of the present invention row.
Claims (10)
- A kind of 1. microwave frequency micromatic setting of coaxial manetron, it is characterised in that including supporting item and with coaxial manetron Drive link, plastic deformation part, drive plate and the frequency modulation ring that coaxial is set, the supporting item, which combines, is fixed on coaxial manetron Shell, the both ends of the plastic deformation part respectively in connection with being fixed on the supporting item and the drive plate, the drive link With reference to the top surface for being fixed on the drive plate, the top surface of the frequency modulation ring, which combines, is fixed with multiple circumferentially uniformly distributed connections for bottom surface Bar, the top surface of the connecting rod is with reference to the bottom surface for being fixed on the drive plate；The frequency modulation ring is located at the exocoel of coaxial manetron In, the fine setting to coaxial manetron microwave frequency is realized by the displacement along inner cavity axial direction under the drive of the drive link.
- 2. the microwave frequency micromatic setting of coaxial manetron according to claim 1, it is characterised in that the plastic deformation Part is metal bellows, and the drive link is located in the tube chamber of the metal bellows close to the part of the drive plate.
- 3. the microwave frequency micromatic setting of coaxial manetron according to claim 1, it is characterised in that the frequency modulation ring Thickness is 6-10mm.
- 4. the microwave frequency micromatic setting of coaxial manetron according to claim 1, it is characterised in that the connecting rod Number is 3.
- 5. the microwave frequency micromatic setting of coaxial manetron according to claim 1, it is characterised in that the drive link, The material of plastic deformation part, drive plate and connecting rod is stainless steel, and the material of the frequency modulation ring is oxygen-free copper.
- 6. the microwave frequency micromatic setting of coaxial manetron according to claim 1, it is characterised in that the frequency modulation ring position The position of top and close inner cavity in the exocoel of coaxial manetron.
- 7. the microwave frequency micromatic setting of coaxial manetron according to claim 1, it is characterised in that the plastic deformation The both ends of part are respectively welded in the supporting item and the drive plate, and the bottom surface of the drive link is welded in the top of the drive plate Face, the top surface of the frequency modulation ring are welded with multiple circumferentially uniformly distributed connecting rods, and the top surface of the connecting rod is welded in the transmission The bottom surface of disk.
- 8. the microwave frequency micromatic setting of coaxial manetron according to claim 1, it is characterised in that the supporting item weldering It is connected to the shell of coaxial manetron or is integrally formed with the shell of coaxial manetron.
- 9. a kind of coaxial manetron, it is characterised in that including the micro- of the coaxial manetron as any one of claim 1-8 Wave frequency rate micromatic setting.
- 10. coaxial manetron according to claim 9, it is characterised in that the coaxial manetron is the coaxial magnetic control of C-band Pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711496191.5A CN107946157A (en) | 2017-12-31 | 2017-12-31 | The microwave frequency micromatic setting and coaxial manetron of a kind of coaxial manetron |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711496191.5A CN107946157A (en) | 2017-12-31 | 2017-12-31 | The microwave frequency micromatic setting and coaxial manetron of a kind of coaxial manetron |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111223732A (en) * | 2020-01-14 | 2020-06-02 | 四川大学 | Side-fed multi-port frequency adjusting device and assembly based on load characteristics of magnetron |
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| EP0074173A1 (en) * | 1981-09-08 | 1983-03-16 | English Electric Valve Company Limited | Improvements in or relating to magnetrons |
| US5449972A (en) * | 1993-07-30 | 1995-09-12 | Litton Systems, Inc. | Low-torque magnetron tuning device |
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| CN106711001A (en) * | 2016-11-18 | 2017-05-24 | 广东威特真空电子制造有限公司 | Magnetron frequency modulation apparatus |
| CN207611737U (en) * | 2017-12-31 | 2018-07-13 | 中国电子科技集团公司第十二研究所 | A kind of the microwave frequency micromatic setting and coaxial manetron of coaxial manetron |
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| US2551614A (en) * | 1946-08-31 | 1951-05-08 | Standard Telephones Cables Ltd | Tunable magnetron |
| GB1133429A (en) * | 1966-06-24 | 1968-11-13 | Sfd Lab Inc | Ditherable and tunable microwave tube having a dithered tuner actuator of fixed length |
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| US4247828A (en) * | 1978-07-03 | 1981-01-27 | Societa Italiana Telecomunicazioni Siemens S.P.A. | Reciprocating piston tuning mechanism for a microwave oscillator |
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| US5449972A (en) * | 1993-07-30 | 1995-09-12 | Litton Systems, Inc. | Low-torque magnetron tuning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111223732A (en) * | 2020-01-14 | 2020-06-02 | 四川大学 | Side-fed multi-port frequency adjusting device and assembly based on load characteristics of magnetron |
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