CN207320056U - A kind of photocathode protection - Google Patents
A kind of photocathode protection Download PDFInfo
- Publication number
- CN207320056U CN207320056U CN201721052383.2U CN201721052383U CN207320056U CN 207320056 U CN207320056 U CN 207320056U CN 201721052383 U CN201721052383 U CN 201721052383U CN 207320056 U CN207320056 U CN 207320056U
- Authority
- CN
- China
- Prior art keywords
- cavity
- cylindrical cavity
- coaxial
- wall
- coupling aperture
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of photocathode protection, including the first cylindrical cavity, the second cylindrical cavity, coaxial cavity, annulus hole, rectangular waveguide, coupling aperture, hollow disc and cut-off waveguide, wherein the second cylindrical cavity is connected with the first cylindrical cavity and coaxial cavity respectively, second cylindrical cavity end carries cut-off waveguide, and coaxial cavity is connected realization coupling by coupling aperture with rectangular waveguide.The utility model is compact-sized, microwave power coupling aperture is moved into coaxial cavity one end by cylindrical cavity side, keeps the rotational symmetry of cylindrical cavity, is avoided since asymmetry coupling aperture produces multipole fields, so that with beam emittance is reduced, the good result of quality of beam is improved.
Description
Technical field
It the utility model is related to accelerator field, more particularly to a kind of photocathode protection.
Background technology
Photocathode protection is mainly the electron source for producing high-quality, is internationally recognized following high-quality electron source
Generation device, be advanced light source, free-electron laser, THz source and based on high-quality electronic beam current system candidate electricity
Component.It is to produce electronics by laser bombardment photocathode, under the action of microwave field, accelerates to draw electronic beam current.Common light
Cathode microwave electron gun, microwave power open coupling aperture by cylindrical cavity side, in cylindrical cavity internal motivation microwave field.Due to perforate
The asymmetry of position, easily encourages multipole fields inside cylindrical cavity.Under the action of multipole fields, beam emittance increases, beam
Family status matter reduces.
The utility model provides a kind of photocathode protection, solves coupling aperture position of opening and destroys cylindrical cavity rotation
The problem of symmetry.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of photocathode protection, solves coupling aperture and opens
The problem of cylindrical cavity rotational symmetry, is destroyed in hole site.
To achieve these goals, the technical scheme in the invention for solving the technical problem is：
A kind of photocathode protection, including the first cylindrical cavity, the second cylindrical cavity, coaxial cavity, annulus hole, rectangular wave
Lead, coupling aperture, hollow disc and cut-off waveguide, wherein the first cylindrical cavity and the second cylindrical cavity are connected by hollow disc,
Two cylindrical cavity ends carry cut-off waveguide, and the second cylindrical cavity is connected with coaxial cavity, and coaxial cavity passes through coupling aperture and rectangular waveguide phase
Even, coaxial cavity one end is connected composition resonator by annulus hole with the second cylindrical cavity, and the other end is connected with coupling aperture, realizes rectangle
Waveguide is coupled with coaxial cavity.
Wherein, the coaxial cavity and the second cylindrical cavity composition resonator, connected by annulus hole, wherein annulus hole outside diameter with
Coaxial cavity wall internal diameter is connected, and annulus hole internal diameter and the second cylinder cavity wall outside diameter are connected.
Wherein, the coaxial resonator end surface inner wall is connected with annulus hole bottom surface inner wall, the second cylinder resonator end surface inner wall and annulus
Bottom hole face inner wall is coplanar.
Wherein, the coaxial cavity is connected by coupling aperture with rectangular waveguide, one side end face inner wall of coupling aperture and coaxial cavity one
Hold inner wall coplanar.
The beneficial effects of the utility model：The utility model is compact-sized, by microwave power coupling aperture by cylindrical cavity side
Coaxial cavity one end is moved to, keeps the rotational symmetry of cylindrical cavity, avoids since asymmetry coupling aperture produces multipole fields, makes
Must have reduces beam emittance, improves the good result of quality of beam.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the diagrammatic cross-section of the utility model.
Mark meaning is in Fig. 2：101 be rectangular waveguide, and 102 be coupling aperture, and 103 be coaxial cavity, and 104 be annulus hole, 105
It is cut-off waveguide for the first cylindrical cavity, 106,107 be the second cylindrical cavity, and 108 be hollow disc.
Embodiment
Illustrate the utility model is further described below in conjunction with the accompanying drawings：
As shown in Figure 2：A kind of photocathode protection, including coaxial cavity 103, annulus chamber 104, the first cylindrical cavity 105,
Hollow disc 108, the second cylindrical cavity 107, cut-off waveguide 106, rectangular waveguide 101 and coupling aperture 102.
First cylindrical cavity 105 and the second cylindrical cavity 107 are connected by hollow disc 108, wherein 107 end of the second cylindrical cavity
With cut-off waveguide 106, the second cylindrical cavity 107 is connected with coaxial cavity 103, and coaxial cavity 103 passes through coupling aperture 102 and rectangular waveguide
101 are connected, and one end of coaxial cavity 103 is connected composition resonator, the other end and coupling by annulus hole 104 with the second cylindrical cavity 107
Close hole 102 to be connected, realize that rectangular waveguide 101 is coupled with coaxial cavity 103.
103 and second cylindrical cavity 107 of coaxial cavity forms resonator, is connected by annulus hole 104, wherein annulus hole
104 inner wall outside diameters are connected with 103 inner wall internal diameter of coaxial cavity, and 104 inner wall internal diameter of annulus hole and 107 inner wall outside diameter of the second cylindrical cavity connect
Connect, 103 end face inner wall of coaxial cavity and 104 bottom surface inner wall of annulus hole are coplanar, 107 end face inner wall of the second cylindrical cavity and annulus hole 104
Bottom surface inner wall is coplanar.
The coaxial cavity 103 is connected by coupling aperture 102 with rectangular waveguide 101,102 1 side end face inner wall of coupling aperture with it is same
103 one end inner wall of axocoel is coplanar.
In conclusion the utility model provides a kind of photocathode protection, the rotational symmetry of cylindrical cavity is maintained
Property, asymmetric coupling aperture excitation multipole fields are avoided, reduce the emittance of electron beam source, improve quality of beam, electronic beam current is stablized
Property is good.
The basic principle, main feature and advantage of the utility model has been shown and described above.The technology people of the industry
Member it should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe
The principle of the utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also have various changes
Change and improve, these changes and improvements will be fallen into claimed the scope of the utility model.The requires of the utility model is protected
Scope is by appended claims and its equivalent circle.
Claims (2)
- A kind of 1. photocathode protection, it is characterised in that：Including the first cylindrical cavity, the second cylindrical cavity, coaxial cavity, annulus Hole, rectangular waveguide, coupling aperture, hollow disc and cut-off waveguide, the first cylindrical cavity and the second cylindrical cavity are connected by hollow disc Connect, wherein the second cylindrical cavity end carries cut-off waveguide, the second cylindrical cavity is connected with coaxial cavity, and coaxial cavity passes through coupling aperture and square Shape waveguide is connected, and coaxial cavity one end is connected composition resonator by annulus hole with the second cylindrical cavity, and the other end is connected with coupling aperture, Realize that rectangular waveguide is coupled with coaxial cavity；The coaxial cavity and the second cylindrical cavity composition resonator, connected by annulus hole, wherein annulus hole inner wall outside diameter with it is coaxial Cavity wall internal diameter is connected, and annulus hole inner wall internal diameter and the second cylinder cavity wall outside diameter are connected；The coaxial resonator end surface inner wall is connected with annulus hole bottom surface inner wall, the second cylinder resonator end surface inner wall and annulus hole bottom surface inner wall It is coplanar.
- A kind of 2. photocathode protection according to claim 1, it is characterised in that：The coaxial cavity passes through coupling aperture It is connected with rectangular waveguide, one side end face inner wall of coupling aperture and coaxial cavity one end inner wall are coplanar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721052383.2U CN207320056U (en) | 2017-08-22 | 2017-08-22 | A kind of photocathode protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721052383.2U CN207320056U (en) | 2017-08-22 | 2017-08-22 | A kind of photocathode protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207320056U true CN207320056U (en) | 2018-05-04 |
Family
ID=62431870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721052383.2U Active CN207320056U (en) | 2017-08-22 | 2017-08-22 | A kind of photocathode protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207320056U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113365409A (en) * | 2021-05-19 | 2021-09-07 | 中国原子能科学研究院 | Traveling wave acceleration structure and electron accelerator |
-
2017
- 2017-08-22 CN CN201721052383.2U patent/CN207320056U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113365409A (en) * | 2021-05-19 | 2021-09-07 | 中国原子能科学研究院 | Traveling wave acceleration structure and electron accelerator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106253031B (en) | Submicrosecond grade long pulse high efficiency the theory of relativity Cherenkov's oscillator | |
| CN106971929B (en) | The controllable Relativistic backward-wave oscillator of across the wave band multifrequency of one kind | |
| CN105355528B (en) | A kind of bielectron note terahertz radiation source for crossing mould cascade high-frequency structure | |
| US9583301B2 (en) | Metamaterial high-power microwave source | |
| CN106992106A (en) | A kind of backward wave oscillator of power adjustable | |
| CN207320056U (en) | A kind of photocathode protection | |
| CN207217458U (en) | A kind of photocathode protection | |
| CN207217457U (en) | A kind of photocathode protection | |
| CN207217459U (en) | A kind of photocathode protection | |
| CN206789517U (en) | C-band high-power klystron | |
| CN103258703B (en) | A kind of microstrip line slow-wave structure | |
| CN103050356B (en) | High-power millimeter wave and terahertz wave signal frequency doubling device | |
| CN107946156A (en) | Electronic collector of coaxial transit time oscillator capable of working in long pulse state | |
| CN107968030A (en) | Coaxial injection is greater than the coaxial relativistic klystron amplifier of mould in one kind | |
| CN107359098A (en) | A kind of photocathode protection | |
| CN105244248A (en) | Radial structure continuous wave terahertz oscillator | |
| CN103824738A (en) | Klystron output resonant cavity | |
| CN206877965U (en) | A kind of across wave band controllable Relativistic backward-wave oscillator of multifrequency | |
| CN202855700U (en) | Radial logarithmic spiral micro-strip slow wave line | |
| CN203260549U (en) | Microstrip line slow-wave structure | |
| CN102903587A (en) | Radial logarithmic spiral micro-stripe slow wave line | |
| GB676630A (en) | Improvements in thermionic valve arrangements | |
| CN204303753U (en) | A kind of microwave ultraviolet lamp based on electron cyclotron resonace principle | |
| CN107424888A (en) | The slow-wave structure of travelling-wave tubes | |
| CN203812849U (en) | Structure for preventing electron sputtering of electron tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |