CN203275662U - Microgravity ground state spectral line detection device - Google Patents
Microgravity ground state spectral line detection device Download PDFInfo
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- CN203275662U CN203275662U CN 201220603558 CN201220603558U CN203275662U CN 203275662 U CN203275662 U CN 203275662U CN 201220603558 CN201220603558 CN 201220603558 CN 201220603558 U CN201220603558 U CN 201220603558U CN 203275662 U CN203275662 U CN 203275662U
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- resonance absorption
- spectral line
- ground state
- atomic
- microgravity
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Abstract
The utility model discloses a microgravity ground state spectral line detection device, comprising a light source 201, a central processor 207, a magnetic field control module 204, an atom resonance absorbent mould 202, a microwave source 205, an optical detection unit 206, and a temperature detection unit 203. The light source 201 is connected with the atom resonance absorbent mould 202. The magnetic field control module 204 is connected with the atom resonance absorbent mould 202, the temperature detection unit 203, and the central processor 207 in sequence. The microwave source 20 is connected with the atom resonance absorbent mould 202 and the central processor 207 in sequence. The temperature detection unit 203 is connected with the atom resonance absorbent mould 202. The device enables measuring operation on atomic spectral lines under microgravity environment, and is characterized by simple structure and accurate measurement.
Description
Technical field
The utility model belongs to the atomic physics technical field, particularly a kind of microgravity ground state spectral line sniffer.
Background technology
In traditional atomic spectral line sniffer, because atomic velocity is too fast, cause that the factor that causes too much frequency shifts is arranged in measuring process.Simultaneously, use the non-uniform magnetic-field Trapping of Atoms, also caused the problems such as non-homogeneous broadening of spectral lines.And under microgravity condition, can use the atom (slowing down 10-100 doubly than atom conventional art medium velocity) of utmost point jogging speed, can make spectral line be down to 0.05-0.1Hz.Slow atom also helps the factor that further reduces much to cause frequency shifts, as: residue Doppler shift, spectral line traction frequency displacement, residue quadratic Zeeman effect, relativistic effect and collision frequency displacement etc.Atom is in free suspended state under microgravity condition, need not use the non-uniform magnetic-field Trapping of Atoms, is conducive to eliminate non-homogeneous broadening of spectral lines.Simultaneously, in the space away from ground, with the noise of shockproof introducing, the interference of electromagnetic field is also little than ground.So microgravity environment is a desirable experimental site that carries out accurate physical measurement.This just makes designs a kind of atomic spectral line sniffer that is applied under microgravity environment and becomes a kind of new technical barrier.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of atomic spectral line sniffer that is applied under microgravity environment, and have simple in structure, measure accurate characteristics.
For solving the problems of the technologies described above, the utility model provides a kind of microgravity ground state spectral line sniffer, comprising: light source, central processing unit, be used for regulating magnetic field the magnetic field control module, be used for quantum leap the atomic resonance absorption module, be used for the temperature detecting unit that the optical detecting unit that the microwave source of energy, light signal after being used for described atomic resonance absorption module is processed detect is provided and is used for the system works temperature is detected to described atomic resonance absorption module; Described light source is connected with described atomic resonance absorption module; Described magnetic field control module is connected with described atomic resonance absorption module, described temperature detecting unit, described central processing unit successively; Described microwave source is connected with described atomic resonance absorption module, described central processing unit successively; Described optical detecting unit is connected with described atomic resonance absorption module, described central processing unit successively; Described temperature detecting unit is connected with described atomic resonance absorption module.
Further, described atomic resonance absorption module comprises: resonance absorption unit, resonator cavity; Described resonator cavity is the microwave cavity of TE111 pattern, and described resonance absorption unit is placed in described intra resonant cavity; The described resonance absorption unit hyperfine 0-0 jump frequency of Atom ground state is the central reference frequency that atomic spectral line detects; Operation material in described resonance absorption unit is by a kind of element and isotopics thereof; Described resonance absorption unit inwall is provided with one deck protective layer.
Further, described resonator cavity comprises: cylindrical cavity, coupling ring, tuning device and field coil; It is inner that described resonance absorption unit is placed in described cylindrical cavity; Described coupling ring one end is fixedly connected with the external cable heart yearn, and the other end is fixedly connected with described cylindrical cavity body cavity lid by screw threads for fastening mechanism; Described field coil is laterally close on described cylindrical cavity outer wall; Described tuning device is fixedly connected with described cylindrical cavity, by changing the length of described tuning device in described cylindrical cavity, the chamber is regulated frequently.
Further, described tuning device is screw.
Further, described protective layer is paraffin.
Further, described atomic resonance absorption module also comprises: temperature resistance, at least one photoelectric cell; Described temperature resistance is arranged on by circuit board above described resonator cavity, is used for monitoring the working temperature of described cylindrical cavity; Described photoelectric cell is arranged on the both sides of described cylindrical cavity central axis.
Further, described photoelectric cell quantity is 2, and is symmetricly set on the both sides of described cylindrical cavity central axis.
Further, described central processing unit is controlled described microwave source frequency output, and described microwave source output frequency is used for completing the frequency sweep of whole atomic spectral line near the hyperfine 0-0 jump frequency of described atomic ground state.
Further, described light source is used for the element of radiation laser beam and the operation material of described resonance absorption unit is the same element.
Further, described screw threads for fastening mechanism is that screw connects.
A kind of microgravity ground state spectral line sniffer that the utility model provides comprises light source, central processing unit, magnetic field control module, atomic resonance absorption module, microwave source, optical detecting unit and temperature detecting unit.In the course of work, go out light beam to the atomic resonance absorption module by radiation of light source, the atomic resonance absorption module is completed the quantum transition process by resonance absorption unit, resonator cavity, and the optical signal transmission after processing is to optical detecting unit, optical detecting unit detects the light signal that transmits, and testing result is transferred to central processing unit.Wherein, the resonance excitation microwave source provides energy for the quantum leap of atomic resonance absorption module.The resonance excitation microwave source is exported by its frequency of central processing unit control break, and resonance excitation microwave source output frequency is near atomic ground state hyperfine structure 0-0 transition centre frequency, to complete the frequency sweep of whole atomic spectral line.The magnetic field control module is completed former quantum splitting and the quantization axle needed magnetic field in the atomic resonance absorption module, and its intensity is controlled by central processing unit.After temperature detecting unit detects the operating ambient temperature of atomic resonance absorption module, transfer to central processing unit, central processing unit is according to supplemental characteristic A, the B of storage inside, field supply in the control module of magnetic field is regulated control, and then compensate by changing the atom centre frequency atom centre frequency variation that causes due to temperature variation, finally control the atom centre frequency and remain unchanged.And have simple in structure, measure accurate characteristics.
Description of drawings
The microgravity ground state spectral line sniffer theory structure block diagram that Fig. 1 provides for the utility model embodiment.
The microgravity ground state spectral line sniffer For Atoms absorption module structural representation that Fig. 2 provides for the utility model embodiment.
Wherein, 1-cylindrical cavity, 2-chamber wall, the 3-coupling ring, 4-screw, 5-field coil, 6-resonance absorption unit, 7-paraffin, 8-temperature resistance, the 9-photoelectric cell, 10-covers in the chamber, the 201-light source, 202-atomic resonance absorption module, 203-temperature detecting unit, 204-magnetic field control module, the 205-microwave source, 206-optical detecting unit, 207-central processing unit.
Embodiment
Below in conjunction with accompanying drawing, the embodiment that the utility model embodiment is provided is described in further detail.
Referring to Fig. 1, a kind of microgravity ground state spectral line sniffer that the utility model embodiment provides, comprise light source 201, central processing unit 207, be used for regulating magnetic field magnetic field control module 204, be used for quantum leap atomic resonance absorption module 202, be used for the temperature detecting unit 203 that the optical detecting unit 206 that the resonance excitation microwave source 205 of energy, light signal after being used for described atomic resonance absorption module is processed detect is provided and is used for the system works temperature is detected to atomic resonance absorption module 202.Wherein, light source 201 is connected with atomic resonance absorption module 202.Magnetic field control module 204 is connected with atomic resonance absorption module 202, temperature detecting unit 203, central processing unit 207 successively.Resonance excitation microwave source 205 is connected with atomic resonance absorption module 202, central processing unit 207 successively.Optical detecting unit 206 is connected with atomic resonance absorption module 202, central processing unit 207 successively.Temperature detecting unit 203 is connected with atomic resonance absorption module 202.
Referring to Fig. 2, in the present embodiment, atomic resonance absorption module 202 comprises: resonance absorption unit, resonator cavity.The resonance absorption unit is placed in intra resonant cavity.
Preferably, resonator cavity is the microwave cavity of TE111 pattern.The resonator cavity Main Function is that the microwave transition for the atomic ground state fine structure provides suitable microwave field, and its resonant frequency is chosen on atomic ground state fine structure 0-0 transition centre frequency.Simultaneously, resonator cavity also plays a part to provide thermal environment for the resonance absorption unit.
In the present embodiment, microwave cavity mainly is made of cylindrical cavity 1, coupling ring 3, tuning device, field coil 5.The coupling scheme that microwave cavity is taked are loop coupling (being magnetic coupling) modes, and in order to improve the degree of coupling, coupling ring 3 one ends are fixedly connected with the coaxial cable core wire that is fixed well, and the other end is fixed on the central axis of chamber lid 10 by screw threads for fastening mechanism.Due to machining error, frequently there is different in actual chamber with result of calculation, by changing the length of tuning device in the chamber, (the fine setting scope probably has about 50MHz) is finely tuned in the chamber frequently.
Preferably, tuning device is screw, and screw threads for fastening mechanism is that screw connects.
Simultaneously, atomic resonance absorption module 202 also comprises: temperature resistance, at least one photoelectric cell.Wherein, temperature resistance is arranged on by circuit board above microwave cavity, is used for the operating ambient temperature of monitoring cavity.Field coil 5 adopts horizontal mode close on cylindrical cavity 1 outer wall, field supply by 207 pairs of magnetic field control modules 204 of central processing unit is adjusted, and act on close field coil 5 on cylindrical cavity 1 outer wall, and then the magnetic field that makes cylindrical cavity 1 produce varying strength, make the atomic ground state generation division and quantization axle that are arranged in the resonance absorption unit.The intensity of the longitudinal component of microwave magnetic field is the strongest in coupling ring both sides, so descend in working order atomic resonance transition signal the strongest place on the cavity both sides.Preferably, photoelectric cell quantity is 2, and is arranged at symmetrically the both sides of cylindrical cavity 1 central axis.
In the present embodiment, preferably, the resonance absorption unit is the balloon-shaped structure of being made by transparent glass material.The hyperfine 0-0 jump frequency of the ground state of resonance absorption unit Atom is namely the central reference frequency that atomic spectral line detects.Operation material in the resonance absorption unit is by a kind of element and isotopics thereof.For example: natural rubidium
87Rb,
85Rb.Wherein
87Rb content is 27.8%,
85Rb content is 72.2%.Preferably, the element of light source 201 radiation laser beams is
87Rb, the light that light source 201 sends are sent in atomic resonance absorption module 202, and as shown in Figure 2, if light passes through from the bottom up, the first half of resonance absorption unit mainly plays filter action so, and latter half mainly plays resonant interaction.Because the utility model embodiment must be applied to microgravity environment, the system of filling can not reduce live width, improves optical pumping the inert gas that (“ Ying Guang temper goes out " and " excitation level mixes ") efficient is used in the resonance absorption unit.And under microgravity condition, atom is in free suspended state, owing to there is no inert gas, each atomic motion speed is the same, and very slow, so the average magnetic field that each atom stands is the same, the impact such as the microwave power frequency displacement that will reduce to bring because of Magnetic field inhomogeneity like this.But just because of do not fill inert gas processed, can cause atom and the probability of resonance absorptive unit inwall collision to increase, can increase " the frequency wall moves effect " (frequency displacement that occurs because of atom and the collision of resonance absorptive unit inwall), so at the inwall of resonance absorption unit, one deck protective layer is set.Preferably, protective layer is paraffin, is used for reducing the frequency displacement that atom produces with the inwall collision of resonance absorptive unit.
In the real work engineering, come frequency sweep to obtain the atomic spectral line center frequency value by changing microwave source 205 frequencies, but this value can be subjected to the variation of ambient temperature, and the temperature variation frequency wall that paraffine layer 7 causes move effect and affect.So the embodiment of the present invention is before practical application, operating ambient temperature by the manual change system, measure the center frequency value that obtains atomic spectral line, and then the atom centre frequency that obtains to cause due to temperature variation change concern A, such as 1 degree centigrade of atom centre frequency of every variation changes 1E-10.Simultaneously, change resonator cavity external magnetic field intensity by magnetic field control module 204, obtain the B that concerns that different magnetic field electric current and the atom centre frequency that causes change, such as every variations 1mA atom centre frequency variation 1E-10.And A, B are saved in central processing unit 207.And then in the actual measurement application, detect the working temperature of atomic resonance absorption module 202 by temperature detecting unit 203, in case change, convert it into as after concrete working temperature value C, concern A, concern B by central processing unit 207 inquiry storage inside, and then pass through to regulate field supply in the control module 204 of magnetic field, and then compensate by changing the atom centre frequency atom centre frequency variation that causes due to temperature variation, finally control the atom centre frequency and remain unchanged.
A kind of microgravity ground state spectral line sniffer that the utility model provides, comprise light source 201, central processing unit 207, be used for regulating magnetic field magnetic field control module 204, be used for quantum leap atomic resonance absorption module 202, be used for the temperature detecting unit 203 that the optical detecting unit 206 that the resonance excitation microwave source 205 of energy, light signal after being used for described atomic resonance absorption module is processed detect is provided and is used for the system works temperature is detected to described atomic resonance absorption module.In the course of work, give off light beam to atomic resonance absorption module 202 by light source 201, atomic resonance absorption module 202 is completed the quantum transition process by resonance absorption unit, resonator cavity, and the optical signal transmission after processing is to optical detecting unit 206,206 pairs of light signals that transmit of optical detecting unit detect, and testing result is transferred to central processing unit 207.Wherein, resonance excitation microwave source 205 provides energy for 202 quantum leaps of atomic resonance absorption module.Resonance excitation microwave source 205 is exported by its frequency of central processing unit 207 control breaks, and resonance excitation microwave source 205 output frequencies are near atomic ground state hyperfine structure 0-0 transition centre frequency, to complete the frequency sweep of whole atomic spectral line.Magnetic field control module 204 is completed former quantum splitting and the quantization axle needed magnetic field in atomic resonance absorption module 202, and its intensity is controlled by central processing unit 207.After temperature detecting unit 203 detects the operating ambient temperature of atomic resonance absorption module 202, transfer to central processing unit 207, central processing unit 207 is according to supplemental characteristic A, the B of storage inside, field supply in the control module of magnetic field is regulated control, and then compensate by changing the atom centre frequency atom centre frequency variation that causes due to temperature variation, finally control the atom centre frequency and remain unchanged.
It should be noted last that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to example, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (10)
1. microgravity ground state spectral line sniffer, comprise light source (201), central processing unit (207), it is characterized in that, also comprise: for the magnetic field control module (204) of regulating magnetic field, for the atomic resonance absorption module (202) of quantum leap, for the microwave source (205) that energy is provided to described atomic resonance absorption module (202), for the optical detecting unit (206) that the light signal after described atomic resonance absorption module (202) processing is detected and for the temperature detecting unit (203) that the system works temperature is detected;
Described light source (201) is connected with described atomic resonance absorption module (202);
Described magnetic field control module (204) is connected with described atomic resonance absorption module (202), described temperature detecting unit (203), described central processing unit (207) successively;
Described microwave source (205) is connected with described atomic resonance absorption module (202), described central processing unit (207) successively;
Described optical detecting unit (206) is connected with described atomic resonance absorption module (202), described central processing unit (207) successively;
Described temperature detecting unit (203) is connected with described atomic resonance absorption module (202).
2. microgravity ground state spectral line sniffer according to claim 1, is characterized in that, described atomic resonance absorption module (202) comprising: resonance absorption unit, resonator cavity;
Described resonator cavity is the microwave cavity of TE111 pattern, and described resonance absorption unit is placed in described intra resonant cavity;
The described resonance absorption unit hyperfine 0-0 jump frequency of Atom ground state is the central reference frequency that atomic spectral line detects;
Described resonance absorption unit inwall is provided with one deck protective layer.
3. microgravity ground state spectral line sniffer according to claim 2, is characterized in that, described resonator cavity comprises: cylindrical cavity (1), coupling ring (3), tuning device and field coil (5);
Described resonance absorption unit is placed in described cylindrical cavity (1) inside;
Described coupling ring (3) one ends are fixedly connected with the external cable heart yearn, and the other end is fixedly connected with described cylindrical cavity (1) chamber lid (10) by screw threads for fastening mechanism;
Described field coil (5) is laterally close on described cylindrical cavity (1) outer wall;
Described tuning device is fixedly connected with described cylindrical cavity (1), by changing the length of described tuning device in described cylindrical cavity (1), the chamber is regulated frequently.
4. any one microgravity ground state spectral line sniffer according to claim 3, it is characterized in that: described tuning device is screw.
5. microgravity ground state spectral line sniffer according to claim 2, it is characterized in that: described protective layer is paraffin (7).
6. microgravity ground state spectral line sniffer according to claim 5, is characterized in that, described atomic resonance absorption module also comprises: temperature resistance (8), at least one photoelectric cell (9);
Described temperature resistance (8) is arranged on by circuit board above described resonator cavity, is used for monitoring the working temperature of described cylindrical cavity (1);
Described photoelectric cell (9) is arranged on the both sides of described cylindrical cavity (1) central axis.
7. microgravity ground state spectral line sniffer according to claim 6 is characterized in that:
Described photoelectric cell (9) quantity is 2, and is symmetricly set on the both sides of described cylindrical cavity (1) central axis.
8. microgravity ground state spectral line sniffer according to claim 7 is characterized in that:
Described central processing unit (207) is controlled the output of described microwave source (205) frequency, and described microwave source (205) output frequency is used for completing the frequency sweep of whole atomic spectral line near the hyperfine 0-0 jump frequency of described atomic ground state.
9. microgravity ground state spectral line sniffer according to claim 8 is characterized in that: described light source (201) is used for the element of radiation laser beam and the operation material of described resonance absorption unit is the same element.
10. according to claim 3-8 described microgravity ground state of any one spectral line sniffers is characterized in that: described screw threads for fastening mechanism is that screw connects.
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| CN 201220603558 CN203275662U (en) | 2012-11-15 | 2012-11-15 | Microgravity ground state spectral line detection device |
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| CN 201220603558 CN203275662U (en) | 2012-11-15 | 2012-11-15 | Microgravity ground state spectral line detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980656A (en) * | 2012-11-15 | 2013-03-20 | 江汉大学 | Atomic spectral line detector based on microgravity environment |
| CN106774532A (en) * | 2016-12-29 | 2017-05-31 | 江汉大学 | Steady optical frequency output intent high and its control system |
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2012
- 2012-11-15 CN CN 201220603558 patent/CN203275662U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980656A (en) * | 2012-11-15 | 2013-03-20 | 江汉大学 | Atomic spectral line detector based on microgravity environment |
| CN106774532A (en) * | 2016-12-29 | 2017-05-31 | 江汉大学 | Steady optical frequency output intent high and its control system |
| CN106774532B (en) * | 2016-12-29 | 2019-02-01 | 江汉大学 | High steady optical frequency output method and its control system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20151115 |
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| EXPY | Termination of patent right or utility model |