CN102749839A - Ionization source system of hydrogen atomic clock - Google Patents
Ionization source system of hydrogen atomic clock Download PDFInfo
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- CN102749839A CN102749839A CN2011100971859A CN201110097185A CN102749839A CN 102749839 A CN102749839 A CN 102749839A CN 2011100971859 A CN2011100971859 A CN 2011100971859A CN 201110097185 A CN201110097185 A CN 201110097185A CN 102749839 A CN102749839 A CN 102749839A
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- ionization
- ionization source
- atomic clock
- supporting column
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
- G04F5/14—Apparatus for producing preselected time intervals for use as timing standards using atomic clocks
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Abstract
The invention relate to an ionization source system of a hydrogen atomic clock. The ionization source system comprises an ionization bulb (3), a heat-conducting supporting post (2), a sealing mounting surface (5), an ionization source box (1), an exciting circuit (9) and a radio frequency coil (8), wherein the heat-conducting supporting post (2) is sleeved on the outer side of the ionization bulb (3); the sealing mounting surface (5) is arranged at one end of the heat-conducting supporting post (2); the ionization source box (1) is arranged at the other end of the heat-conducting supporting post (2); an opening used for accommodating the ionization bulb (3) is formed in the side wall, close to the heat-conducting supporting post (2), of the ionization source box (1); the exciting circuit (9) is arranged in the ionization source box (1); and the radio frequency coil (8) is arranged in the ionization source box (1) and positioned above the ionization bulb (3). The ionization source system is simple in structure, high in ionization efficiency and good in radiating effect, and can be directly applied to the hydrogen atomic clock.
Description
Technical field
The present invention relates to the hydrogen atomic clock field, relate more specifically to a kind of hydrogen atomic clock and use the ionization origin system, can directly be used for hydrogen atomic clock.
Background technology
Time is one of five fundamental physical quantities, and its accurate measurement is had important scientific research and using value.After getting into twentieth century, utilize and confirm that energy level transition realizes that the atomic clock of split-second precision output is ripe gradually, and used widely.Practical atomic clock comprises rubidium atomic clock, cesium-beam atomic clock and hydrogen atomic clock at present; Wherein hydrogen atomic clock have outstanding a middle or short term degree of stability with good long-term stability and drift rate index, can be used for the various fields such as time service, navigator fix and communication guarantee of keeping time.
The principle of work of hydrogen atomic clock be utilize hydrogen atom ground state (F=1, mF=0) with (F=0, mF=0) jump frequency between the two hyperfine energy levels locks crystal oscillator.Plant hydrogen imports the ionization source system through after purifying, and the hydrogen molecule disassociation becomes state of atom during this period, emits light and heat simultaneously; Hydrogen atom forms the atom line by collimating apparatus; Under the effect of magnetic separation attitude device, (F=1, mF=0) hydrogen atom of attitude is injected the storage bubble in the microwave cavity; And the microwave resonance transition takes place therein; Make microwave energy increase in the chamber, just can the microwave signal of Circuits System output be locked on the atomic transition spectral line through the microwave energy that detects in the microwave cavity, thus the output signal that can obtain having high stability and pin-point accuracy.This shows that the core of hydrogen atomic clock is its physical piece, comprise microwave cavity, ionization source system and state selection system etc., wherein the ionization source system is the important subsystem of hydrogen atomic clock.
In order to carry out the ionization of hydrogen molecule with high as far as possible efficient; Avoid simultaneously hydrogen atom is produced too much external disturbance; What hydrogen atomic clock ionization source system generally adopted at present is the mode of radio frequency ionization; Producing frequency through built-in exciting circuit is about 100MHz, and power is the radiofrequency signal of 5～10W, excites hydrogen molecule to make it to dissociate into state of atom.Concrete structure such as document Robert F C Vessot, " The Atomic Hydrogen Maser Oscillator, " Metrologia 42 (2005) S80-S89 and Samuel R.Stein; Boulder, colo, Dissociator for Atomic Masers.U S Patent:4; 734,622,1988; And N.A.Demidov; A.A.Belyaev, B.A.Sakharov, A.A.Uljanov; Shown in " Passive Hydrogen Maser Frequency Stability and Accuracy Investigations Passive Hydrogen Maser Frequency Stability, " 7th European Frequency and Time Forum Neuchatec 16-17-181993.The similarity of these several kinds of ionization sources is, hydrogen is continued to import in the ionization bubble of quartzy system, and radiofrequency signal acts on the ionization bubble with inductive coupling or capacity coupled mode simultaneously, thereby hydrogen molecule is dissociated in the ionization bubble.This mode ionizing efficiency is high, but continuous working.But exist component structural complicated, heat conduction is not smooth, can't adapt to shortcomings such as vacuum environment.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of hydrogen atomic clock ionization source system; This ionization source system has simple in structure; The characteristics that heat conduction is unobstructed can be widely used in all types of hydrogen atomic clocks, satisfy the request for utilization of the various working environments that comprise vacuum environment.
A kind of hydrogen atomic clock ionization source of the present invention system comprises: the ionization bubble; Be sleeved on the heat conduction supporting column in the outside of said ionization bubble; Be installed in the sealing installed surface on the end of said heat conduction supporting column; Be installed in the ionization source capsule on the said heat conduction supporting column other end, on the sidewall of said ionization source capsule, be provided with one and be used to hold the opening that said ionization is steeped near said heat conduction supporting column; Be installed in the inner exciting circuit of said ionization source capsule; And it is inner and be positioned at the radio-frequency coil of the top of said ionization bubble that said ionization source capsule is installed.
This ionization source system also is included in the heat dissipating housing that said ionization source capsule inside is installed in said opening part and closely links to each other with the end face of said ionization bubble.
This ionization source system also comprises and is installed in said ionization source capsule near the heat pipe that extends to the bottom installed surface of said ionization source capsule on the sidewall of said heat conduction supporting column and from said heat conduction supporting column.
This ionization source system comprises that also the inside that is installed in the ionization source capsule is used for detecting the light-sensitive detector of the optical radiation that ionization process produces.
Said ionization bubble is fixedly mounted on the sealing installed surface through fixed knob.
Said ionization source capsule is installed on the said heat conduction supporting column through screw.
Said heat conduction supporting column is installed on the said sealing installed surface through screw.
Said ionization source capsule is the can of one processing.
Ionization source of the present invention system compared with prior art; Have simple and compact for structure, easy to process, physical strength is high, the heat transfer efficiency advantages of higher obtains actual verification on the model machine of laboratory; It does not need traditional wind-cooling heat dissipating when under atmosphere, working, ionization bubble working temperature is lower than 40 ℃; But also operate as normal of this ionization source system under vacuum, ionization bubble working temperature is lower than 50 ℃, has solved the problem that traditional electrical can't be worked under vacuum from origin system.
Description of drawings
Fig. 1 is the one-piece construction cut-open view of hydrogen atomic clock ionization source of the present invention system.
Fig. 2 is the structural representation of the ionization source capsule of hydrogen atomic clock ionization source of the present invention system.
Fig. 3 is the working temperature curve of hydrogen atomic clock ionization source system of the present invention under vacuum.
Embodiment
Below in conjunction with accompanying drawing hydrogen atomic clock ionization source of the present invention system is elaborated.
As shown in Figure 1, hydrogen atomic clock ionization source of the present invention system is made up of ionization source capsule 1, heat conduction supporting column 2, ionization bubble 3, fixed knob 4, sealing installed surface 5, heat dissipating housing 6, heat pipe 7, radio-frequency coil 8, exciting circuit 9, light-sensitive detector 10 and gib screw 11,12.Screw 11 is used to connect ionization source capsule 1 and heat conduction supporting column 2, and screw 12 is used to connect heat conduction supporting column 2 and sealing installed surface 5.
Heat conduction supporting column 2 is installed on the sealing installed surface 5 with ionization bubble 3, and wherein ionization bubble 3 is installed on the sealing installed surface 5 through fixed knob 4, continues to import hydrogen in the inside of this ionization bubble 3, is used for carrying out as hydrogen molecule the environment of ionization.Heat conduction supporting column 2 is sleeved on the outside of ionization bubble 3, is connected on the sealing installed surface 5 through screw 12, is used to support ionization source capsule 1, the heat that the side produces when deriving 3 work of ionization bubble simultaneously.Ionization source capsule 1 is directly installed on the heat conduction supporting column 2 through screw 11, as the mounting box and the passage of heat of ionization source circuit.The outer wall of the inwall of heat conduction supporting column 2 and ionization bubble 3 fully near, and ionization source capsule 1 snugly fits on the heat conduction supporting column 2, has constituted thus from the side of ionization bubble 3 to the complete heat transfer path of ionization source capsule 1.On the sidewall of ionization source capsule 1 near heat conduction supporting column 2, be provided with circular open, ionization source capsule 1 is contained in outside the ionization bubble 3 through this opening sleeve.Radio-frequency coil 8 is installed in the ionization source capsule 1, is positioned at ionization and steeps 3 tops, is used for the radiofrequency signal radiation that ionization process is required and gets into ionization bubble 3.Exciting circuit 9 is installed in the ionization source capsule 1, is used to produce the required radiofrequency signal of ionization process.Light-sensitive detector 10 is installed in the ionization source capsule 1, is used for detecting the optical radiation that ionization process produces, thus the duty of monitoring ionization source system.This ionization source capsule 1 inner exciting circuit 9 of installing, radio-frequency coil 8 and light-sensitive detector 10 circuit such as grade and devices can directly be used to excite the hydrogen molecule in the ionization bubble 3, accomplish ionization work, thereby make the structure of ionization source system compact more.Heat dissipating housing 6 is installed between the end face and ionization source capsule 1 of ionization bubble 3; The inboard of this heat dissipating housing 6 closely is connected with the end face of ionization bubble 3; Constituted thus by ionization and steeped the passage of heat of 3 end faces to ionization source capsule 1, the heat that end face produces when being used for 3 work of ionization bubble exports to ionization source capsule 1.Heat pipe 7 is installed on the ionization source capsule 1 sidewall near heat conduction supporting column 2; Be positioned between the bottom installed surface 13 (as shown in Figure 2) of heat conduction supporting column 2 and ionization source capsule 1; It extends to ionization source capsule 1 bottom near bottom installed surface 13 from heat conduction supporting column 2, is used for the heat on the ionization source capsule 1 is conducted to this bottom installed surface 13.
This ionization source capsule 1 is the can of one processing; Its inside is provided with the mounting hole and the shielding construction of ionization circuit, as the carrier of ionization circuit, constitutes perfect passage of heat through metal case and heat pipe 7 simultaneously; To reach the purpose of strengthening heat radiation; The ionization source system work process can be passed on the ionization source capsule 1 through heat conduction supporting column and heat dissipating housing by the heat that the ionization bubble produces, and conducts to the radiating end that is positioned at ionization source capsule 1 bottom by heat pipe 7 again, i.e. bottom installed surface 13.The bottom of ionization source capsule 1 is provided with mechanical installation foot in addition; The whole ionization source system that is used for comprising ionization source capsule 1 is installed in outside installed surface; Heat conducts through ionization source bottom installed surface 13; And derive the ionization source system, can constitute complete unobstructed ionization source system radiating passage thus.Through just can assemble the complete novel hydrogen atomic clock ionization source of cover system with upper type.
Emulation of the computer software and actual tests show that this structure of the present invention can satisfy the heat radiation requirement of hydrogen atomic clock ionization source system under various working environments, and the working temperature of each parts does not all exceed designing requirement during system works.Do not need traditional wind-cooling heat dissipating, ionization to steep 3 working temperatures when the ionization source system works under atmosphere in this hydrogen atom and be lower than 40 ℃.But also operate as normal of this ionization source system under vacuum; Fig. 3 is the working temperature curve of hydrogen atomic clock ionization source system of the present invention under vacuum; Show the thermovacuum experimental data of this ionization source system, change the temperature conditions of outside platform in the experiment gradually, the working temperature of test ionization bubble; This temperature of data presentation is lower than 50 ℃ all the time, and the visible traditional electrical that the invention solves leaves the problem that origin system can't be worked under vacuum.
The above is merely preferred embodiment of the present invention, is not in order to limiting scope of the present invention, and the above embodiment of the present invention can also be made various variations.Be that every simple, equivalence of doing according to the claims and the description of application of the present invention changes and modification, all fall into the claim protection domain of patent of the present invention.
Claims (8)
1. a hydrogen atomic clock ionization source system is characterized in that, comprising:
Ionization bubble (3);
Be sleeved on the heat conduction supporting column (2) in the outside of said ionization bubble (3);
Be installed in the sealing installed surface (5) on the end of said heat conduction supporting column (2);
Be installed in the ionization source capsule (1) on the other end of said heat conduction supporting column (2), on the sidewall of said ionization source capsule (1), be provided with near said heat conduction supporting column (2) one be used to hold said ionization bubble (3) opening;
Be installed in the inner exciting circuit (9) of said ionization source capsule (1); And said ionization source capsule (1) inside is installed and is positioned at the radio-frequency coil (8) that the top of (3) is steeped in said ionization.
2. hydrogen atomic clock ionization source according to claim 1 system is characterized in that, also is included in the heat dissipating housing (6) that said ionization source capsule (1) inside is installed in said opening part and closely links to each other with the end face of said ionization bubble (3).
3. hydrogen atomic clock ionization source according to claim 1 and 2 system; It is characterized in that, also comprise being installed in said ionization source capsule (1) near the heat pipe (7) that extends to the bottom installed surface (13) of said ionization source capsule (1) on the sidewall of said heat conduction supporting column (2) and from said heat conduction supporting column (2).
4. hydrogen atomic clock ionization source according to claim 1 system is characterized in that, comprises that also the inside that is installed in ionization source capsule (1) is used for detecting the light-sensitive detector (10) of the optical radiation that ionization process produces.
5. hydrogen atomic clock ionization source according to claim 1 system is characterized in that, said ionization bubble (3) is fixedly mounted on through fixed knob (4) and seals on the installed surface (5).
6. hydrogen atomic clock ionization source according to claim 1 system is characterized in that said ionization source capsule (1) is installed on the said heat conduction supporting column (2) through screw (11).
7. hydrogen atomic clock ionization source according to claim 1 system is characterized in that said heat conduction supporting column (2) is installed on the said sealing installed surface (5) through screw (12).
8. hydrogen atomic clock ionization source according to claim 1 system is characterized in that, said ionization source capsule (1) is the can of one processing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100971859A CN102749839B (en) | 2011-04-18 | 2011-04-18 | Ionization source system of hydrogen atomic clock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100971859A CN102749839B (en) | 2011-04-18 | 2011-04-18 | Ionization source system of hydrogen atomic clock |
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| CN102749839A true CN102749839A (en) | 2012-10-24 |
| CN102749839B CN102749839B (en) | 2013-12-18 |
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| CN2011100971859A Active CN102749839B (en) | 2011-04-18 | 2011-04-18 | Ionization source system of hydrogen atomic clock |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342212A (en) * | 2017-07-18 | 2017-11-10 | 上海示方科技有限公司 | A kind of ionization source system, Hydrogen Atom Frequency Standard |
| CN114173464A (en) * | 2021-11-10 | 2022-03-11 | 中国科学院上海天文台 | System for preparing hydrogen plasma of hydrogen atom frequency standard |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4734622A (en) * | 1986-05-14 | 1988-03-29 | Ball Corporation | Dissociator for atomic masers |
| CN201569869U (en) * | 2009-10-30 | 2010-09-01 | 中国科学院上海天文台 | Vacuum device of active hydrogen atom clock |
-
2011
- 2011-04-18 CN CN2011100971859A patent/CN102749839B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4734622A (en) * | 1986-05-14 | 1988-03-29 | Ball Corporation | Dissociator for atomic masers |
| CN201569869U (en) * | 2009-10-30 | 2010-09-01 | 中国科学院上海天文台 | Vacuum device of active hydrogen atom clock |
Non-Patent Citations (2)
| Title |
|---|
| ROBERT F C VESSOT: "The atomic hydrogen maser oscillator", 《METROLOGIA》 * |
| 沈国辉 等: "氢原子频标电离泡封接工艺研究", 《时间频率学术会议》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342212A (en) * | 2017-07-18 | 2017-11-10 | 上海示方科技有限公司 | A kind of ionization source system, Hydrogen Atom Frequency Standard |
| CN107342212B (en) * | 2017-07-18 | 2019-05-10 | 上海新示方科技有限公司 | A kind of ionization source system, Hydrogen Atom Frequency Standard |
| CN114173464A (en) * | 2021-11-10 | 2022-03-11 | 中国科学院上海天文台 | System for preparing hydrogen plasma of hydrogen atom frequency standard |
| CN114173464B (en) * | 2021-11-10 | 2023-11-24 | 中国科学院上海天文台 | System for preparing hydrogen plasma of hydrogen atom frequency scale |
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| CN102749839B (en) | 2013-12-18 |
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