CN100474692C - Rubidium atomic frequency standard microwave cavity resonator - Google Patents
Rubidium atomic frequency standard microwave cavity resonator Download PDFInfo
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- CN100474692C CN100474692C CNB2006100181248A CN200610018124A CN100474692C CN 100474692 C CN100474692 C CN 100474692C CN B2006100181248 A CNB2006100181248 A CN B2006100181248A CN 200610018124 A CN200610018124 A CN 200610018124A CN 100474692 C CN100474692 C CN 100474692C
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Abstract
This invention discloses a rubidium atomic frequency standard microwave resonant cavity, which is composed of the resonant ring, support tube, cylindrical cavity, rubidium absorption foam, rubidium filter foam, heating pipe, heating pipe block, C coil, and etc. The rubidium absorption and filter foam insert into the support tube, the media ring inserts into the position between the support tube and cylindrical cavity, the resonant ring inserts into the position between the media ring and rubidium absorption foam, the cylindrical cavity sets out of the media ring linking the support tube by screws, the heating triode sets in the heating tube block, and the block links the support tube and cylindrical cavity through screws.
Description
Technical field
The present invention relates to a kind of rubidium atomic frequency standard microwave cavity resonator field, more specifically relate to a kind of rubidium atomic frequency standard microwave cavity resonator, can be directly used in the Rb atom frequency marking.
Background technology
Along with the development of modern science and technology, many fields all need stable more and the precise time frequency signal, and traditional mechanical timer and crystal oscillator regularly can not be satisfied the demand.Atomic frequency standard has high stability and accuracy, so obtained utilization more and more widely.Wherein the Rb atom frequency marking volume is little, and is in light weight, and better performances is so occupied the very big market share.
Rb atom frequency marking is made of physical piece and circuit part.Physical piece has determined the main performance of Rb atom frequency marking.Physical piece is made up of the rubidium spectral lamp and the cavity bubble system that produce pumping light.Cavity bubble system comprises the microwave cavity that is used to store microwave field, the rubidium absorption dunk and the rubidium filtering blobs of storage rubidium element, the photocell of sensed light signal and C field coil etc.The rubidium atom by the pumping rayed after, make and between two hyperfine energy levels of rubidium atomic ground state population inversion take place that the population that promptly goes up energy level is higher than energy level down.When microwave frequency in being stored in microwave cavity and two energy level frequency intervals match, the microwave transition will promptly take place from last energy level transition to following energy level in the rubidium atom.When the microwave transition takes place, the light intensity signal that photocell detects will change, and be called light inspection signal.The error signal that Rb atom frequency marking utilizes this light inspection signal to produce just is locked in microwave frequency on the rubidium atomic transition spectral line, obtains standard frequency output.This shows that microwave cavity is the core component of excitation rubidium atom microwave transition, its performance is very big to the performance impact of rubidium frequency standard.
The early stage Rb atom frequency marking microwave cavity that uses mostly is the standard chamber, as the TE111 chamber, and TE011 chamber etc.The volume in this class chamber is bigger.In order to reduce volume, several non-standard chambeies have appearred.Comprise by W.Froncisz and the described annular space of JamesS.Hyde chamber (The Loop-gap resonator:A new microwave lumped circuitESR sample structure[J] .J Mag.Reson., 1982,47:515～521); By T.Sphicopoulous and the described fluting tube chamber of F.Gardiol (Slotted tube cavity:a compact resonator withempty core[J] .IEEE Proc, 1987,134 (5): 405～410); By described magnetron cavities such as H.Schweda (Atomic frequency standard[P] .US Patent:387881,1995).The common feature in these several chambeies is all to have used a kind of LC structure, this LC structure is by constituting around microwave cavity axis and the metal pole piece that equidistantly distributes, wherein the effect of pole piece is equivalent to inductance, the effect in pole piece gap is equivalent to electric capacity, and the resonance frequency in chamber is by the geometric parameter decision of LC structure.The advantage of this class microwave cavity is that volume is little, and field mode is superior.Shortcoming is the requirement on machining accuracy height, and relatively difficulty is regulated in assembling and chamber frequently.Mei Ganghua etc. has invented a kind of fluting tube chamber (Miniatured microwave cavity for atomic frequency standard[P] .US Patent:6 225 870 B1,2001) of new construction.The LC structure in this chamber by directly on metallic cylinder fluting realize, except the advantage that keeps several chambeies, front, also have simple in structure, handling ease, the advantage that the Q value is high.
Summary of the invention
The objective of the invention is to be to provide a kind of rubidium atomic frequency standard microwave cavity resonator, this microwave cavity has simple in structure, easily processing, and the microwave field pattern is superior, and field distribution is even, and the microwave fill factor, curve factor is big, the advantage that easily transfer frequently in the chamber.It can be directly used in and make the high-performance Rb atom frequency marking.
Characteristics of the present invention are: by resonant ring in the microwave cavity 1 and stay pipe 2, make the present invention have in the LC structure that microwave cavity is different in the past.Resonant ring 1 and stay pipe 2 are equivalent to inductance.Between resonant ring 1 and the stay pipe 2 certain interval is arranged, be equivalent to electric capacity.By adjusting the geometric parameter of this LC structure, make microwave cavity produce resonance in needed characteristic frequency.
Microwave is coupled in the microwave cavity by coupling loop.Induce the microwave field that around it, produces around it by resonant ring 1.As shown in Figure 2.Resonant ring 1 is circular.The microwave field that produces is similar to the TE011 pattern, and pattern is superior, helps encouraging the microwave resonance transition that absorbs rubidium atom in the bubble.By changing the height L of resonant ring 1, the microwave field field pattern that can adjust in the chamber distributes, and absorbs the interior rubidium atom of bubble with abundant excitation, thereby obtains maximum microwave resonance signal, and then improves the signal to noise ratio of system.By changing the gap W (Fig. 2) between resonant ring 1 and the stay pipe 2, can adjust the resonance frequency in the chamber easily, guarantee that microwave resonance frequency and rubidium atomic transition frequency are consistent.This microwave cavity has kept that above-mentioned several cavity volume is little, pattern is superior, Q value advantages of higher, and avoided pole piece in the above-mentioned cavity configuration to take the shortcoming of microwave distribution space, thereby have higher microwave fill factor, curve factor, and the microwave field in the microwave cavity is more evenly distributed.This structure is less demanding to each position component and machining accuracy, and assembling is simple, and institute is so that processing and manufacturing.
The present invention compared with prior art, the most significant advantage is that the microwave fill factor, curve factor is big, it is superior to have the microwave field pattern simultaneously, field pattern is even, frequently easily transfer in the chamber, simple in structure, easily machining characteristics.
Description of drawings
Fig. 1: the microwave resonance field pattern schematic diagram that produces around a kind of resonant ring
Fig. 2: the structural representation of a kind of resonant ring and stay pipe
Fig. 3: a kind of schematic diagram of rubidium atomic frequency standard microwave cavity resonator
Embodiment
According to Fig. 1, Fig. 2, Fig. 3 as can be known, the microwave cavity that is used for Rb atom frequency marking is made up of resonant ring 1, stay pipe 2, cylindrical cavity 3, dielectric ring 4, rubidium filtering blobs 5, rubidium absorption dunk 6, end cap 7, coupling loop 8, photocell 9, heating pipe holder 10, heating triode 11, C field coil 12, screw 13a-d, screw 13e-h.Screw 13a-d is used to connect end cap 7 and cylindrical cavity 3, and screw 13e-h is used to connect heating pipe holder 10, stay pipe 2 and cylindrical cavity 3.
It is characterized in that: rubidium filtering blobs 5 and rubidium absorption dunk 6 close fits are inserted in the stay pipe 2, and the two respectively charges into the buffer gas of an amount of isotope rubidium and certain ingredients and proportioning.Stay pipe 2 is made (as alloy aluminum) by metal material, is used to support rubidium filtering blobs 5 and rubidium absorption dunk 6.Dielectric ring 4 close fits are inserted between stay pipe 2 and the cylindrical cavity 3, are used to reduce the effective volume of resonant cavity.Resonant ring 1 close fit is inserted between dielectric ring 4 and the rubidium absorption dunk 6, and available suitable viscose glue cements (as epoxy radicals bi-component glue), makes whole chamber form firm type structure.Resonant ring 1 is made (as alloy aluminum) by metal material, and its effect is the resonance microwave field of excitation rings around it, and microwave field is similar to the TE011 pattern, can be used for encouraging the microwave resonance transition that absorbs rubidium atom in the bubble.Cylindrical cavity 3 links to each other with stay pipe 2 by screw 13e-h, makes (as alloy aluminum) by metal material.11 close fits of heating triode are packed between heating pipe holder 10 and the stay pipe 2 upper flange dishes, can heat whole microwave cavity after the energising, and making the rubidium metallic transition in rubidium filtering blobs 5 and the rubidium absorption dunk 6 is the operation material of Rb atom frequency marking---the rubidium steam.Have a groove on the heating pipe holder 10, be used to hold heating triode 11.Screw 13e-h is fixed on the cylindrical cavity upper end with heating pipe holder 10 and stay pipe 2.End cap 7 is connected cylindrical cavity 3 lower ends by screw 13a-d, makes (as copper) by metal material, as an end face of microwave cavity.Coupling loop 8 one ends are welded on the end cap 7, and the other end is drawn out to outside the chamber, and as the input of microwave signal, effect is that microwave is coupled into the chamber.Photocell 9 sticks with glue in the end cap inner surface, is used to survey light signal.C field coil 12 is wound on the cylindrical cavity 3, is used to produce the magnetostatic field that is parallel to the microwave resonance cavity axis.This magnetostatic field is used to make
87Small division takes place in the hyperfine energy level of Rb, and provides atomic transition required quantization axle.By just can assemble the complete rubidium frequency standard microwave cavity bubble system of a cover with upper type, can be used for making Rb atom frequency marking.
Claims (1)
1, a kind of rubidium atomic frequency standard microwave cavity resonator, it is by cylindrical cavity (3) dielectric ring (4), end cap (7), coupling loop (8), heating triode (11), C field coil (12) constitutes, it is characterized in that rubidium filtering blobs (5) and rubidium absorption dunk (6) insert in the stay pipe (2), dielectric ring (4) inserts between stay pipe (2) and the cylindrical cavity (3), resonant ring (1) inserts between dielectric ring (4) and the rubidium absorption dunk (6), resonant ring (1) is an annular, gapped between resonant ring (1) and the stay pipe (2), end cap (7) is connected cylindrical cavity (3) by screw (13a-d) and is an end face of microwave cavity, coupling loop (8) one ends are welded on the end cap (7), the other end stretches out outside the chamber, heating triode (11) is packed between heating pipe holder (10) and the cylindrical cavity (3), heating pipe holder (10) is connected on stay pipe (2) and the heating triode (11) by screw (13e-h), C field coil (12) is wound on the cylindrical cavity (3), cylindrical cavity (3) is contained in outside the dielectric ring (4), links to each other with stay pipe (2) by screw (13e-h).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100181248A CN100474692C (en) | 2006-01-10 | 2006-01-10 | Rubidium atomic frequency standard microwave cavity resonator |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100181248A CN100474692C (en) | 2006-01-10 | 2006-01-10 | Rubidium atomic frequency standard microwave cavity resonator |
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| CN101000974A CN101000974A (en) | 2007-07-18 |
| CN100474692C true CN100474692C (en) | 2009-04-01 |
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| CNB2006100181248A Expired - Fee Related CN100474692C (en) | 2006-01-10 | 2006-01-10 | Rubidium atomic frequency standard microwave cavity resonator |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077799B (en) * | 2012-12-05 | 2015-06-03 | 东南大学 | Passive hydrogen clock ultra-uniform C-field magnetic cylinder and manufacturing method thereof |
| CN103048917B (en) * | 2012-12-21 | 2015-08-05 | 成都天奥电子股份有限公司 | For the cylindrical waveguide microwave cavity of rubidium clock |
| CN104410412B (en) * | 2014-10-10 | 2017-05-17 | 中国科学院武汉物理与数学研究所 | Dual-bubble microwave cavity for rubidium frequency scale |
| CN106067816B (en) * | 2016-06-07 | 2018-08-14 | 中国科学院上海天文台 | Hydrogen atomic clock transfiguration tuner |
| CN106129573B (en) * | 2016-08-19 | 2019-01-11 | 中国科学院武汉物理与数学研究所 | A kind of New type atom frequency marking microwave cavity |
| CN112332840B (en) * | 2021-01-05 | 2021-04-02 | 中国科学院精密测量科学与技术创新研究院 | Subminiature atomic frequency standard microwave cavity based on microstrip line structure |
| CN116979963A (en) * | 2023-09-25 | 2023-10-31 | 中国科学院精密测量科学与技术创新研究院 | A thickening integrated form bubble body structure for reducing rubidium atomic frequency standard atmospheric pressure influence |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4494085A (en) * | 1982-04-28 | 1985-01-15 | Eg&G, Inc. | Miniaturized atomic frequency standard having both filter cell and absorption cell in resonator cavity |
| US5517157A (en) * | 1993-04-27 | 1996-05-14 | Ball Corporation | Evanescent-field interrogator for atomic frequency standards |
| CN2912015Y (en) * | 2006-01-10 | 2007-06-13 | 中国科学院武汉物理与数学研究所 | Rb atom frequency-marking microwave resonant cavity |
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2006
- 2006-01-10 CN CNB2006100181248A patent/CN100474692C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4494085A (en) * | 1982-04-28 | 1985-01-15 | Eg&G, Inc. | Miniaturized atomic frequency standard having both filter cell and absorption cell in resonator cavity |
| US5517157A (en) * | 1993-04-27 | 1996-05-14 | Ball Corporation | Evanescent-field interrogator for atomic frequency standards |
| CN2912015Y (en) * | 2006-01-10 | 2007-06-13 | 中国科学院武汉物理与数学研究所 | Rb atom frequency-marking microwave resonant cavity |
Non-Patent Citations (1)
| Title |
|---|
| 一种小型化铷原子频标腔泡系统及其频移特性. 夏白桦，钟达，安绍锋，梅刚华.计量学报，第26卷第2期. 2005 * |
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