CN2359720Y - Hydrogen atomic clock maser oscillator structure - Google Patents
Hydrogen atomic clock maser oscillator structure Download PDFInfo
- Publication number
- CN2359720Y CN2359720Y CN 98247331 CN98247331U CN2359720Y CN 2359720 Y CN2359720 Y CN 2359720Y CN 98247331 CN98247331 CN 98247331 CN 98247331 U CN98247331 U CN 98247331U CN 2359720 Y CN2359720 Y CN 2359720Y
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- Prior art keywords
- chamber
- bubble
- atomic clock
- hydrogen
- hydrogen atomic
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Abstract
The utility model relates to a hydrogen atomic clock pulse oscillator structure, which comprises an atomic beam source, an energy state selector, a cavity and bulb subassembly and two signal coupling cables which are orderly arranged in a vacuum chamber all, wherein, an upper cover of the cavity and bulb subassembly adopts a disk-shaped spring compacting structure, and a lower cover of the cavity and bulb subassembly adopts the structure of six rollers and the structure of a floating and supporting basic plate. A thin wall cylinder is sheathed outside the cavity and bulb subassembly, the compacting structure of the upper cover, and the supporting structure of the lower cover. The lower end of the thin wall cylinder is the composite design of an inner opened groove and is fixed on the floating basic plate, the upper end passes through six disk-shaped springs which are tightly fixed by threaded bolts, and thus, one similar solid structure is formed, and the stability and the shock resistance of the utility model are increased.
Description
The utility model relates to a kind of modular construction of hydrogen atomic clock, specifically, is the improvement structure of the hydrogen atomic oscillator (or claiming maser oscillator) in a kind of hydrogen atomic clock.
Hydrogen Atom Frequency Standard (being commonly called as hydrogen atomic clock) is a kind of high precision time and frequency standard.Because its accuracy height, degree of stability is good, therefore in national defence, space technology and modern science test important use is arranged.Hydrogen atomic clock be frequency signal by the high stable of hydrogen atomic oscillator (maser oscillator) output as standard, go to control that the frequency of a highly stable crystal oscillator constitutes by a phase locking circuit.Its major part is the atomic hydrogen maser oscillator, is equivalent to " pendulum " of hydrogen atomic clock, is important core component.The performance of hydrogen atomic clock just depends mainly on this part.
The atomic hydrogen maser oscillator is to store main position such as bubble and microwave cavity by atomic beam source, energy state selector switch and atom to constitute.Atomic beam source produces hydrogen atom, select the high level hydrogen atom through the effect of the strong non-uniform magnetic-field of energy state selector switch and focus on and the atom that is in the resonator cavity center stores the bubble inlet and enters and stores in the bubble, with resonator cavity medium-high frequency magnetic field interaction, transit to low-lying level and release energy simultaneously from high level, its frequency signal of following is highly stable and by the output of output coupling ring.
The resonator cavity of existing atomic hydrogen maser oscillator-storage bubble (being called for short chamber-bubble) structure is divided into two bodies, the base plate of cavity is placed on the bell jar base plate by three quartz columns, the top board in chamber is then used six double helix shape spring compressions, so its chamber-bubble structure is very unstable, and can not be inverted.Under vacuum state, because the pressure of atmosphere makes bell jar base plate generation deformation, pass to the chamber base plate by three quartz columns, make the resonator cavity distortion and the chamber resonance frequency is changed, this does not wish to take place.In addition, during the last six double helix shape spring compressions in chamber top, the top, chamber is stressed also very inhomogeneous, and therefore this structure changes resonance frequency because extraneous heat and mechanical variation all can make cavity be affected.In addition, the magnetic shielding cylinder of outside, chamber-bubble adopts flat-tope structure, also is subject to STRESS VARIATION and reduces magnetic screening action.Equally, the outer field coil of chamber-bubble is that close not only the magnetic field that is produced is inhomogeneous around forming with enameled wire in the aluminum barrel outside, and weight also weighs.More than these all are very unfavorable structural designs.
The purpose of this utility model is the shortcoming that overcomes existing atomic hydrogen maser oscillator, provides a kind of performance index height, the atomic hydrogen maser oscillator that reliable operation and firm shock resistance are good.
Technical solution of the present utility model is: the resonator cavity-storage bubble structure of atomic hydrogen maser oscillator is improved to one nearly " entity shape structure ", establish floating substrate below the base plate of chamber, floating substrate contacts hardly with the vacuum (-tight) housing base plate, and the chamber base plate is put on the floating substrate by six rollers; Replace existing general helical spring structure with dish-shaped Belleville spring on the top board of chamber.When resonator cavity compresses by these parts that improve design, just constitute a nearly entity integral body.Cavity in vacuum state because change of atmospheric pressure, therefore, when adopting floating substrate, and avoid stress influence, and the application of six rollers and Belleville spring can absorb cavity and changes the radial and axial STRESS VARIATION that produces because of ambient temperature, that is to say, make cavity avoid various STRESS VARIATION owing to above-mentioned these improve design, thereby keep the cavity resonance frequency constant.In addition, magnetic shielding changes taper into, reduces stress deformation and improves the magnetic cup effect.Equally, field coil is used multilayered printed circuit instead and is made, not only evenly but also light and handy.As above-mentioned, the utility model comprises that atomic beam source, energy state selector switch, microwave cavity and atom store bubble, and two signal coupling cables, they are installed in the vacuum chamber successively, and this atom stores foam and is positioned at this microwave resonance cavity, form chamber-bubble assembly, the neck of this foam is connected with this energy state selector switch; This chamber-bubble assembly and its fixed sturcture constitute nearly entity structure, and the loam cake compressing structure system of this chamber-bubble assembly adopts the disk spring structure, and its lower cover supporting structure system adopts six roller bearing structures; The back up pad of chamber bubble assembly then adopts floating board structure; The structure that is fixed and clamped of chamber-bubble assembly comprises a thin cylinder, and it is enclosed within this chamber-bubble assembly, loam cake compressing structure and lower cover supporting structure, and its lower end is that internal recessing is breathed out multiple designs fix on this floating substrate, and 6 bolted disk springs are passed in the upper end;
Further, this uniform magnetic field produces member system and adopts inside and outside two-layer seal line circuit loop construction, the centre coil of serving as theme, two ends are ancillary coil, this armoured magnetic field member by glass not the alloy tube constitute; And be four layers altogether; The floating substrate of above-mentioned this is shallow type, and it becomes line to contact with the vacuum (-tight) housing base plate; Thin cylinder in the structure that is fixed and clamped of chamber-bubble assembly again, it is 200 kilograms that the pressure of 6 bolted on disk spring is passed in its upper end; Also have, it is to adopt thin quartzy annulus to add the hollow quartz ampoule of weldering to freeze in the structure of spherical quartz bubble as support that this atom stores bubble, and two signal coupling cables are the half steel cable, they are walked along " neck " in vacuum chamber, one end passes thorax in the titanium getter pump, be screwed on two vacuum seal High-frequency plugs of ionic pump lower surface symmetry, the other end of two cables is fixed on two coupling ring structures that cover symmetrical distribution under the chamber, one is the output coupling ring, one is the varactor coupling ring, and varactor is in the chamber; The supporting construction that is connected of steeping assembly and magnetic cup assembly with titanium getter pump and chamber one is circular thick aluminium sheet and three titanium bars, the one end is fixed on the thick cylindrical plate, the other end passes four layers of magnetic shielding and is screwed on the vacuum chamber substrate, and titanium getter pump is fixed on thick circle with two thick stainless steels and supports on the aluminium sheet; At last, this hydrogen clock maser oscillator is provided with thick circle and supports aluminium sheet, and symmetry is being fixed and extended four back up pads on it, and they are separately fixed on the anti-rattler that welds on four vertical legs of hydrogen clock support on the triangular support piece of establishing.
Compared with the prior art the utility model has many superiority, and effect has significant progress at aspects such as performance index, functional reliability, firm shock resistance and practicality.
1. frequency accuracy height: prior art is n * 10
-12, and the utility model is 5 * 10
-13
2. degree of stability height: prior art is 8 * 10
-13/ second, 4 * 10
-14/ hour, and the utility model is 2 * 10
-13/ second, 7 * 10
-15/ hour;
3. shock resistance is good, is convenient to install: prior art is for can only vertically placing, can not whole Transporting; And the utility model can be installed placement arbitrarily, even is inverted, but whole Transporting;
4. functional reliability is good: prior art can only be interrupted work, and the life-span is short, but and the utility model continuous working, the life-span is long;
5. practicality is good: prior art can only be used at laboratory environment, and the utility model both can use in the laboratory, can turn round on engineering truck again.
Accompanying drawing of the present utility model is simply described as follows:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the chamber-bubble structure synoptic diagram in the utility model.
Fig. 3 is the loam cake compressing structure enlarged diagram among Fig. 2 of the utility model.
Fig. 4 is the lower cover supporting structure enlarged diagram among the utility model Fig. 2.
Fig. 5 is an application synoptic diagram of the present utility model, the support of the maser oscillator of its signify hydrogen atomic clock in the hydrogen clock frame, sets up and shockproof layout and structure
Below, provide better embodiment of the utility model according to Fig. 1～Fig. 5, and, further provide ins and outs of the present utility model by description to this embodiment.
See also Fig. 1, as shown in the figure, hydrogen atomic clock maser oscillator structure of the present utility model comprises atomic beam source 1, energy state selector switch 2, the member 3 that chamber-bubble assembly and structure thereof constitute, wherein atomic beam source 1, energy state selector switch 2 and chamber-bubble assembly 31 is arranged in order and is in the same vacuum chamber, atomic beam source 1 produces hydrogen atom, through energy state selector switch 2 (is magnetic lens, be six pole magnet in the present embodiment) the effect of strong non-uniform magnetic-field, isolate high level hydrogen atom wherein and make the high level hydrogen atom that chooses focus on atom in chamber-bubble assembly 31 and store bubble inlet 3110 and enter this storages and steep in 311.In the present embodiment, this chamber-bubble assembly and structure thereof constitute part 3, the loam cake compressing structure 312 of its lumen-bubble assembly 31 as shown in the figure, it is to adopt the disk spring structure, it comprises disk spring support 3121, disk spring 3122 and hold-down bolt 3123, tighten hold-down bolt 3123, till the displacement that disk spring 3122 pressurizeds are produced is not with the pressure transformation.In other words, loam cake compressing structure 312 absorbing cavities-bubble assembly 31 is because of the caused axial stress deformation of temperature variation; Lid supporting structure 313 then adopts six roller bearing structures (as shown in Figure 3) to eliminate the caused radial stress deformation because of temperature changes of chamber-bubble assembly under chamber-bubble assembly 31; The back up pad of the chamber in the utility model-bubble assembly 31 is not to adopt fixed sturcture, but adopt floating board structure 314, itself and the almost contactless area of vacuum chamber substrate, to eliminate the vacuum substrate because of the influence of the deformation of atmosphere due to changing to chamber-bubble assembly 31, floating substrate in the present embodiment is shallow shape plate structure, it becomes line to contact with the vacuum chamber base plate, reaches floating purpose.
In the present embodiment, the structure that is fixed and clamped of chamber-bubble assembly 31 adopts a thin cylinder to be enclosed within above said chamber-bubble assembly 31 and sets up the parts outside, to be that the utility model is shockproof can be inverted the fixed hard pressure mode of its tool, any key point of placing: thin cylinder 315 lower ends are designed (see figure 3) again with the internal recessing Kazakhstan and are fixed on the floating substrate 314, these thin cylinder 315 upper ends are passed 6 bolts 3123 and are eaten on disk spring 3122 and with about 200 kilograms power chamber-bubble assembly 31 is compressed and makes whole chamber-bubble assembly 31 become nearly entity structure, thereby make the hydrogen clock agent structure can place and withstand 9 gravity acceleration gs arbitrarily and do not produce what influence.
In the present embodiment, it is the quartzy bubble that stores that atomic clock stores bubble 311, and adopt quartzy annulus to add the hollow quartz ampoule of weldering and make support, 3110 and freeze and store on the bubble at quartz, the adjustable valve piston structure 316 of deciding device with lock of titanium processing is adopted in the mechanical tuning of resonator cavity frequency.
The uniform magnetic field that puts on chamber-bubble assembly 31 in the utility model adopts the inside and outside two-layer seal line circuit loop construction 317 of tubular, the centre circle of serving as theme, and two ends are ancillary coil, and it had both guaranteed the homogeneity in tubular magnetic field, had reduced the weight of coil again.
In Fig. 1, two signal coupling cables 4 are semi-rigid cable, they are walked along neck 317 in vacuum chamber, one end passes thorax in the titanium getter pump 5, stubborn being connected on two vacuum seal High-frequency plugs (not shown on the figure) of this titanium getter pump lower surface symmetry, and the other end of these two signal coupling cables 4 is fixed on two coupling ring members that cover symmetrical distribution under the chamber, one is output coupling ring 3171, one is varactor coupling ring 3172, and this varactor is positioned at this hydrogen atom resonator cavity.
In addition, in the utility model, titanium getter pump 5 is thick cylindrical plate and three titanium bars with the supporting construction 319 that is connected of chamber-bubble assembly 31 and magnetic shielding assembly 318, and the one end is fixed on this thick cylindrical plate, the other end passes four layers of magnetic shielding assembly 318, is screwed on the vacuum chamber substrate.Two thick stainless steels of these two titanium getter pumps, 5 usefulness are fixed on this thick cylindrical plate.
At last, see also Fig. 5, the hydrogen clock maser oscillator of the utility model extends three back up pads 3181 in the system of the installation on the hydrogen clock support on the thick cylindrical plate 318 to this, and on four vertical legs 61 on total frame 6, weld out four triangular support pieces 62, and establish an anti-rattler 621 on each back-up block 62, three back up pads 3181 on this hydrogen clock maser oscillator then are placed on these corresponding four anti-rattlers 621 and by screw and are critical, thereby have improved the shockproof reliability of hydrogen atomic clock.
Claims (10)
1. hydrogen atomic clock maser oscillator structure, comprise that atomic beam source, energy state selector switch, microwave cavity and atom store bubble, and two signal coupling cables, they are installed in the vacuum chamber successively, and this atom stores foam and is positioned at this microwave resonance cavity, form chamber-bubble assembly, the neck of this foam is connected with this energy state selector switch; It is characterized in that: this chamber-bubble assembly and its fixed sturcture constitute nearly entity structure, and the loam cake compressing structure system of this chamber-bubble assembly adopts the disk spring structure, and its lower cover supporting structure system adopts six roller bearing structures; The back up pad of chamber-bubble assembly then adopts floating board structure; The structure that is fixed and clamped of chamber-bubble assembly comprises a thin cylinder, it is enclosed within this chamber-bubble assembly, loam cake compressing structure and lower cover supporting structure outside, its lower end is that internal recessing is breathed out multiple designs fix on this floating substrate, and 6 bolted disk springs are passed in the upper end.
2. according to the described hydrogen atomic clock maser oscillator of claim 1 structure, it is characterized in that this uniform magnetic field produces member system and adopts inside and outside two-layer seal line circuit loop construction, the centre coil of serving as theme, two ends are ancillary coil.
3. hydrogen atomic clock maser oscillator structure according to claim 1, it is characterized in that this armoured magnetic field member by glass not the alloy tube constitute.
4. hydrogen atomic clock maser oscillator structure according to claim 1, it is characterized in that this glass not the alloy magnetic shielding cylinder be four layers altogether.
5. hydrogen atomic clock maser oscillator structure according to claim 1 is characterized in that this floating substrate is shallow type, and it becomes line to contact with the vacuum (-tight) housing base plate.
6. hydrogen atomic clock maser oscillator structure according to claim 1 is characterized in that the thin cylinder in the structure that is fixed and clamped of chamber-bubble assembly, and it is 200 kilograms that the pressure of 6 bolted on disk spring is passed in its upper end.
7. hydrogen atomic clock maser oscillator structure according to claim 1 is characterized in that it is to adopt thin quartzy annulus to add the hollow quartz ampoule of weldering to freeze in the structure of spherical quartz bubble as support that this atom stores bubble.
8. hydrogen atomic clock maser oscillator structure according to claim 1, it is characterized in that two signal coupling cables are the half steel cable, they are walked along neck in vacuum chamber, one end passes thorax in the titanium getter pump, be screwed on two vacuum seal High-frequency plugs of ionic pump lower surface symmetry, the other end of two cables is welded in and is fixed on two coupling ring structures that cover symmetrical distribution under the chamber, and one is the output coupling ring, one is the varactor coupling ring, and varactor is in the chamber.
9. hydrogen atomic clock maser oscillator structure according to claim 1, it is characterized in that titanium getter pump is circular thick aluminium sheet and three titanium bars with the supporting construction that is connected of " chamber-bubble " assembly and magnetic shielding assembly, the one end is fixed on the thick cylindrical plate, the other end passes four layers of magnetic shielding and is screwed on the vacuum chamber substrate, and titanium getter pump is fixed on thick circle with two thick stainless steels and supports on the aluminium sheet.
10. hydrogen atomic clock maser oscillator structure according to claim 1, it is characterized in that this hydrogen clock maser oscillator is located at thick circle and supports aluminium sheet, symmetry is being fixed and is being extended four back up pads on it, and they are separately fixed on the anti-rattler that welds on four vertical legs of hydrogen clock support on the triangular support piece of establishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98247331 CN2359720Y (en) | 1998-12-18 | 1998-12-18 | Hydrogen atomic clock maser oscillator structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98247331 CN2359720Y (en) | 1998-12-18 | 1998-12-18 | Hydrogen atomic clock maser oscillator structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2359720Y true CN2359720Y (en) | 2000-01-19 |
Family
ID=33992587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98247331 Expired - Lifetime CN2359720Y (en) | 1998-12-18 | 1998-12-18 | Hydrogen atomic clock maser oscillator structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2359720Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103429062A (en) * | 2012-05-17 | 2013-12-04 | 中国科学院上海天文台 | Magnetic shielding system and method for improving atomic frequency standard magnetic shielding performance |
| CN110148484A (en) * | 2019-06-10 | 2019-08-20 | 北京无线电计量测试研究所 | A kind of diffusing reflection laser cooling and trapping atoms storage facility and method |
| CN110190848A (en) * | 2019-06-06 | 2019-08-30 | 北京无线电计量测试研究所 | A kind of double state selection devices of Hydrogen Atom Frequency Standard |
| CN111252272A (en) * | 2020-02-26 | 2020-06-09 | 航天科工防御技术研究试验中心 | Vacuum vibration-proof cabin |
-
1998
- 1998-12-18 CN CN 98247331 patent/CN2359720Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103429062A (en) * | 2012-05-17 | 2013-12-04 | 中国科学院上海天文台 | Magnetic shielding system and method for improving atomic frequency standard magnetic shielding performance |
| CN110190848A (en) * | 2019-06-06 | 2019-08-30 | 北京无线电计量测试研究所 | A kind of double state selection devices of Hydrogen Atom Frequency Standard |
| CN110148484A (en) * | 2019-06-10 | 2019-08-20 | 北京无线电计量测试研究所 | A kind of diffusing reflection laser cooling and trapping atoms storage facility and method |
| CN111252272A (en) * | 2020-02-26 | 2020-06-09 | 航天科工防御技术研究试验中心 | Vacuum vibration-proof cabin |
| CN111252272B (en) * | 2020-02-26 | 2022-02-01 | 航天科工防御技术研究试验中心 | Vacuum vibration-proof cabin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |