CN103475365A - Resonant cavity for superconduction frequency stabilization oscillator and application method thereof - Google Patents
Resonant cavity for superconduction frequency stabilization oscillator and application method thereof Download PDFInfo
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- CN103475365A CN103475365A CN2013104185515A CN201310418551A CN103475365A CN 103475365 A CN103475365 A CN 103475365A CN 2013104185515 A CN2013104185515 A CN 2013104185515A CN 201310418551 A CN201310418551 A CN 201310418551A CN 103475365 A CN103475365 A CN 103475365A
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Abstract
The invention discloses a resonant cavity for a superconduction frequency stabilization oscillator and an application method of the resonant cavity. The resonant cavity comprises a resonant cavity body (3), an input beam tube (2), an output beam tube (5), an input coupler (1), an output coupler (6) and a vacuum pumping beam tube (4). The resonant cavity body (3) is cylindrical, one end of the resonant cavity body (3) is fixedly connected with the input beam tube (2), and the other end of the resonant cavity body (3) is fixedly connected with the output beam tube (5). The radius of the resonant cavity body (3) is larger than the radius of the input beam tube (2) and the radius of the output beam tube (5). One end of the vacuum pumping beam tube (4) is fixedly connected with the side wall of the output beam tube (5). The input coupler (1) is arranged at the free end of the input beam tube (2), and the output coupler (6) is arranged at the free end of the output beam tube (5). Both frequency and the Q value of the resonant cavity for the superconduction frequency stabilization oscillator are obviously increased, the frequency of the resonant cavity reaches up to 409GHz, and the Q value of the resonant cavity reaches up to 109.
Description
Technical field
The present invention relates to the resonant cavity technical field, particularly a kind of resonant cavity for the superconduction resonator oscillator and using method thereof.
Background technology
Superconduction resonator oscillator (SCSO) relates to subject and the technology such as radio physics, Superconductor Physics, electronics, control theory and precision optical machinery processing.With respect to traditional atomic clock, the SCSO system has higher short-term frequency stability.The frequency stability of SCSO can reach 10
-15-10
-16magnitude, for example, exceed one to two order of magnitude than atomic clock commonly used in prior art (hydrogen atomic clock, rubidium atomic clock or cesium-beam atomic clock).Therefore, the superconduction resonator oscillator can, as using with reference to source in the assay calibration of hydrogen atomic clock or cesium-beam atomic clock, be also the direction of WeiLai Technology development.
The superconduction resonator oscillator mainly consists of niobium resonant cavity, high-gain low-noise frequency-locked loop, VCO source and decompression cooling system, its every part has many technological difficulties to need to solve, high Q(quality factor) design and the development of resonant cavity be one of them key.
Resonant cavity is the microwave component with energy storage and selecting frequency characteristic, and its key technical indexes comprises resonance frequency, Q value and characteristic impedance.For the superconduction resonator oscillator, the Q value of resonant cavity is more high better.
In prior art, for the resonant cavity of superconduction resonator oscillator, there is following shortcoming:
(1) frequency is lower, and the superconducting cavity of prior art is generally used for electron accelerator, and its frequency is lower than 1GHz, and generally is greater than 4GHz for the frequency of the resonant cavity of superconduction resonator oscillator;
(2) in prior art, the Q value for the resonant cavity of superconduction resonator oscillator is lower, does not generally all reach 10
8.
Summary of the invention
One of purpose of the present invention is the above-mentioned defect for prior art, and a kind of resonant cavity for the superconduction resonator oscillator is provided.
Two of purpose of the present invention is the above-mentioned defects for prior art, and a kind of using method of the resonant cavity for the superconduction resonator oscillator is provided.
Resonant cavity for the superconduction resonator oscillator provided by the invention comprises resonant cavity body, input beam tube, output beam tube, input coupler, output coupler and vacuumizes beam tube; Described resonant cavity body is cylindrical, and an end of described resonant cavity body is fixedly connected with described input beam tube, and its other end is fixedly connected with described output beam tube; The radius of described resonant cavity body is greater than the radius of described input beam tube and described output beam tube; A described end that vacuumizes beam tube is fixedly connected with the sidewall of described output beam tube; Described input coupler is located at the free end of described input beam tube; Described output coupler is located at the free end of described output beam tube.
Preferably, described input beam tube all is fixedly connected with described resonant cavity body by the mode of electron beam welding with described output beam tube.
Preferably, a described end that vacuumizes beam tube is fixedly connected with the sidewall of described output beam tube by the mode of electronic welding.
Preferably, a described end of beam tube and the close described resonant cavity body in junction of described output beam tube of vacuumizing.
Preferably, the material of described resonant cavity body is niobium.
Preferably, described input beam tube, described output beam tube and the described material that vacuumizes beam tube are all niobium.
Preferably, the length of described resonant cavity body is 26mm, and its radius is 30mm.
Preferably, the length of described input beam tube is 30-50mm, and its radius is 5-10mm; The length of described output beam tube is 30-50mm, and its radius is 5-10mm; The described length that vacuumizes beam tube is 30-70mm, and its radius is 5-8mm.
Preferably, the length of the probe of described input coupler is 20-26mm, and its radius is 0.2-0.6mm; The length of the probe of described output coupler is 12-18mm, and its radius is 0.2-0.6mm.
The using method of the resonant cavity for the superconduction resonator oscillator provided by the invention comprises the steps:
By the described beam tube that vacuumizes, described resonant cavity body is vacuumized, when the intrinsic vacuum degree of described resonant cavity is less than 10
-6during Pa, stop vacuumizing;
Utilize described input coupler by microwave signal in described input beam tube is input to described resonant cavity body;
Utilize described resonant cavity body to carry out filtering to microwave signal;
Utilize described output coupler by filtered microwave signal through the output of described output beam tube for.
The present invention has following beneficial effect:
(1) with the resonant cavity for the superconduction resonator oscillator of prior art, the frequency of the resonant cavity for the superconduction resonator oscillator of the present invention obviously improves, and its frequency is up to 4.9GHz,
(2) with the resonant cavity for the superconduction resonator oscillator of prior art, the Q value of the resonant cavity for the superconduction resonator oscillator of the present invention is improve obviously, and its Q value is up to 10
9.
The accompanying drawing explanation
The generalized section of the resonant cavity for the superconduction resonator oscillator that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, summary of the invention of the present invention is further described.
As shown in Figure 1, the resonant cavity for the superconduction resonator oscillator that the present embodiment provides comprises resonant cavity body 3, input beam tube 2, output beam tube 5, input coupler 1, output coupler 6 and vacuumizes beam tube 4.
Resonant cavity body 3 is cylindrical.One end of resonant cavity body 3 is fixedly connected with input beam tube 2, and the other end of resonant cavity body 3 is fixedly connected with output beam tube 5.The radius of resonant cavity body 3 is greater than the radius of input beam tube 2 and output beam tube 5.An end that vacuumizes beam tube 4 is fixedly connected with the sidewall of output beam tube 5, for the equipment with vacuumizing for example vacuum pump be connected, with the internal cavities to resonant cavity body 3, vacuumize.Preferably, vacuumize an end and the close resonant cavity body 3 in the junction of output beam tube 5 of beam tube 4.Input coupler 1 is located at the free end of input beam tube 2, for by input signal, the mode by coupling is input in resonant cavity body 3.Output coupler 6 is located at the free end of output beam tube 5, and the mode for the signal by resonant cavity body 3 by coupling extracts.
In the present embodiment, input beam tube 2 all is fixedly connected with resonant cavity body 3 by the mode of electron beam welding with output beam tube 5; An end that vacuumizes beam tube 4 is fixedly connected with the sidewall of output beam tube 5 by the mode of electronic welding.
In the present embodiment, resonant cavity body 3, input beam tube 2, output beam tube 5 and the material that vacuumizes beam tube 4 are all niobium.
In the present embodiment, input beam tube 2 and output beam tube 5 are all the tubular beam tubes that adopts veneer reeling machine coiling niobium plate to obtain.But the circularity at the weld bond place of the beam tube that adopts veneer reeling machine coiling niobium plate to obtain is lower, thereby affect the quality of electron beam welding.Therefore, adopt veneer reeling machine coiling niobium plate to obtain answering the butt welding mouth place to carry out extrusion process after beam tube, to improve the circularity at weld bond place.
In the present embodiment, the length of resonant cavity body 3 is 26mm, and its radius is 30mm; The length of input beam tube 2 is 30-50mm, and its radius is 5-10mm; The length of output beam tube 5 is 30-50mm, and its radius is 5-10mm; The length that vacuumizes beam tube 4 is 30-70mm, and its radius is 5-8mm; The length of the probe of input coupler 1 is 20-26mm, and its radius is 0.2-0.6mm; The length of the probe of output coupler 6 is 12-18mm, and its radius is 0.2-0.6mm.
The resonant cavity of the present embodiment, before work, need to carry out surface treatment to the inner surface of resonant cavity body 3, to reduce sheet resistance, improves surface roughness and Q value.
The using method of the resonant cavity for the superconduction resonator oscillator that the present embodiment provides comprises the steps:
S1: by vacuumizing 4 pairs of resonant cavity bodies 3 of beam tube, vacuumized, the vacuum degree in resonant cavity body 3 is less than 10
-6during Pa, stop vacuumizing;
S2: utilize input coupler 1 that microwave signal is input in resonant cavity body 3 through input beam tube 2;
S3: utilize 3 pairs of microwave signals of resonant cavity body to carry out filtering;
S4: utilize output coupler 6 by filtered microwave signal through the output of output beam tube 5 for.
With the resonant cavity for the superconduction resonator oscillator of prior art, the frequency of the resonant cavity for the superconduction resonator oscillator of the present embodiment and Q value all obviously improve, and its frequency is up to 4.9GHz, and its Q value is up to 10
9.
Should be appreciated that the above detailed description of technical scheme of the present invention being carried out by preferred embodiment is illustrative and not restrictive.Those of ordinary skill in the art modifies reading the technical scheme that can put down in writing each embodiment on the basis of specification of the present invention, or part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the resonant cavity for the superconduction resonator oscillator, it is characterized in that, this resonant cavity comprises resonant cavity body (3), input beam tube (2), output beam tube (5), input coupler (1), output coupler (6) and vacuumizes beam tube (4);
Described resonant cavity body (3) is cylindrical, and an end of described resonant cavity body (3) is fixedly connected with described input beam tube (2), and its other end is fixedly connected with described output beam tube (5); The radius of described resonant cavity body (3) is greater than the radius of described input beam tube (2) and described output beam tube (5);
A described end that vacuumizes beam tube (4) is fixedly connected with the sidewall of described output beam tube (5);
Described input coupler (1) is located at the free end of described input beam tube (2); Described output coupler (6) is located at the free end of described output beam tube (5).
2. the resonant cavity for the superconduction resonator oscillator according to claim 1, is characterized in that, described input beam tube (2) all is fixedly connected with described resonant cavity body (3) by the mode of electron beam welding with described output beam tube (5).
3. the resonant cavity for the superconduction resonator oscillator according to claim 1, is characterized in that, a described end that vacuumizes beam tube (4) is fixedly connected with the sidewall of described output beam tube (5) by the mode of electronic welding.
4. the resonant cavity for the superconduction resonator oscillator according to claim 1, is characterized in that, a described end of beam tube (4) and the close described resonant cavity body (3) in junction of described output beam tube (5) of vacuumizing.
5. the resonant cavity for the superconduction resonator oscillator according to claim 1, is characterized in that, the material of described resonant cavity body (3) is niobium.
6. the resonant cavity for the superconduction resonator oscillator according to claim 1, is characterized in that, described input beam tube (2), described output beam tube (5) and the described material that vacuumizes beam tube (4) are all niobium.
7. the resonant cavity for the superconduction resonator oscillator according to claim 1, is characterized in that, the length of described resonant cavity body (3) is 26mm, and its radius is 30mm.
8. the resonant cavity for the superconduction resonator oscillator according to claim 1, is characterized in that, the length of described input beam tube (2) is 30-50mm, and its radius is 5-10mm; The length of described output beam tube (5) is 30-50mm, and its radius is 5-10mm; The described length that vacuumizes beam tube (4) is 30-70mm, and its radius is 5-8mm.
9. the resonant cavity for the superconduction resonator oscillator according to claim 1, is characterized in that, the length of the probe of described input coupler (1) is 20-26mm, and its radius is 0.2-0.6mm; The length of the probe of described output coupler (6) is 12-18mm, and its radius is 0.2-0.6mm.
10. as claimed in any one of claims 1-9 wherein for the using method of the resonant cavity of superconduction resonator oscillator, it is characterized in that, this using method comprises the steps:
By the described beam tube (4) that vacuumizes, described resonant cavity body (3) is vacuumized, the vacuum degree in described resonant cavity body (3) is less than 10
-6during Pa, stop vacuumizing;
Utilize described input coupler (1) by microwave signal in described input beam tube (2) is input to described resonant cavity body (3);
Utilize described resonant cavity body (3) to carry out filtering to microwave signal;
Utilize described output coupler (6) by filtered microwave signal through described output beam tube (5) output for.
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| CN2013104185515A CN103475365A (en) | 2013-09-13 | 2013-09-13 | Resonant cavity for superconduction frequency stabilization oscillator and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114678675A (en) * | 2022-03-07 | 2022-06-28 | 电子科技大学 | Device for obtaining established coupling coefficient under low-temperature vacuum condition |
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| US5500995A (en) * | 1993-06-14 | 1996-03-26 | Istituto Nazionale Di Fisica Nucleare | Method of producing radiofrequency resonating cavities of the weldless type |
| CN101888737A (en) * | 2010-06-13 | 2010-11-17 | 赵夔 | Major structure of dual-mode superconductive photocathode injector |
| CN102811546A (en) * | 2012-07-24 | 2012-12-05 | 中国原子能科学研究院 | Method for improving Q (Quality) value of high-frequency resonant cavity |
-
2013
- 2013-09-13 CN CN2013104185515A patent/CN103475365A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5500995A (en) * | 1993-06-14 | 1996-03-26 | Istituto Nazionale Di Fisica Nucleare | Method of producing radiofrequency resonating cavities of the weldless type |
| CN101888737A (en) * | 2010-06-13 | 2010-11-17 | 赵夔 | Major structure of dual-mode superconductive photocathode injector |
| CN102811546A (en) * | 2012-07-24 | 2012-12-05 | 中国原子能科学研究院 | Method for improving Q (Quality) value of high-frequency resonant cavity |
Non-Patent Citations (4)
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| 刘亚萍: ""BEPCII 500MHz 超导高频腔的仿真计算"", 《中国核科学技术进展报告 粒子加速器分卷》 * |
| 吴琼: ""低损耗超导谐振腔的仿真设计和实验研究"", 《2009年时间频率学术会议论文集》 * |
| 吴琼: ""高Q超导谐振腔的实验研究"", 《微波学报》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114678675A (en) * | 2022-03-07 | 2022-06-28 | 电子科技大学 | Device for obtaining established coupling coefficient under low-temperature vacuum condition |
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Application publication date: 20131225 |