CN203337809U - Atomic energy level state selection-based transition number factor measuring device - Google Patents
Atomic energy level state selection-based transition number factor measuring device Download PDFInfo
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- CN203337809U CN203337809U CN2013202889868U CN201320288986U CN203337809U CN 203337809 U CN203337809 U CN 203337809U CN 2013202889868 U CN2013202889868 U CN 2013202889868U CN 201320288986 U CN201320288986 U CN 201320288986U CN 203337809 U CN203337809 U CN 203337809U
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- current value
- atomic beam
- resonance absorption
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Abstract
The utility model discloses an atomic energy level state selection-based transition number factor measuring device and belongs to the atomic frequency standard field. The device comprises a transmitting module, a first state selection module, a resonance absorption module, a detection module and a processing module, wherein the transmitting module is used for providing an atomic beam; the first state selection module is used for subjecting atoms in the atomic beam to state selection by adopting a magnetic deflection technology; the resonance absorption module is used for absorbing the atoms, subjected to state selection, in the atomic beam by using isotope atoms of the atoms in the atomic beam; the detection module is used for detecting the current value of the atomic beam which passes the resonance absorption module, the current value is a first current value when the resonance absorption module is not effected by a magnetic field and radio-frequency signals, and the current value is a second current value when the resonance absorption module is effected by the magnetic field and the radio-frequency signals; the processing module is used for computing atomic transition number factors according to the first current value and the second current value. Therefore, pumping substance absorption rate of the atoms is detected in resonance transition processes.
Description
Technical field
The utility model relates to the atomic transition field, and particularly the factors check device is counted in a kind of transition based on the atomic energy level state selection.
Background technology
Atomic transition refers to, under external influence, and the process that atom changes to another state generation great-jump-forward from a state, the state before atomic transition occurs is called initial state, and the state after transition occurs is called final states.
For realizing that the transition device of atomic transition mainly comprises: light source, resonator cavity and radio frequency source.Under magnetic fields, each energy level generation Zeeman splitting in the hyperfine structure of resonator cavity Atom sample, form the sub-energy level of Zeeman, under the irradiation of the pumping light produced at light source, and the poor increase of population number between each sub-energy level.At this moment, the direction in the magnetic field perpendicular to producing Zeeman splitting, add the rf frequency produced by radio frequency source, when meeting Magneti Resonant Condition, between the sub-energy level of the Zeeman of atom, produces resonant transition.The transition device has widespread use in the atomic frequency standard field, as the physical location of inactive type rubidium atom frequency scale.
In above-mentioned resonant transition process, the absorptivity of resonator cavity Atom to pumping material (pumping light), directly reflected the performance of transition device, so it is just very important to the absorptivity of pumping material how to measure the resonator cavity Atom.
The utility model content
In order to measure in the resonant transition process, the absorptivity of resonator cavity Atom to the pumping material, the utility model embodiment provides a kind of transition based on the atomic energy level state selection to count the factors check device.Described technical scheme is as follows:
The utility model embodiment provides a kind of transition based on the atomic energy level state selection to count the factors check device, and described device comprises:
For the transmitter module of atomic beam is provided;
For adopting the magnetic deflection technology atom of described atomic beam to be carried out to the first state selection module of state selection;
For utilizing the isotope atom of atom of described atomic beam, absorb the resonance absorption module of the atom in the described atomic beam after state selection;
Current value for detection of described atomic beam after described resonance absorption module, when being subject to magnetic field and radiofrequency signal, described resonance absorption module do not do the used time, described current value is the first current value, when being subject to described magnetic field and described radiofrequency signal, described resonance absorption module does the used time, the detection module that described current value is the second current value;
For according to described the first current value and described the second current value, calculating the processing module that atomic transition is counted the factor, described atomic transition is counted the factor for being illustrated in resonant transition process, the ratio that the part that the atom in low-lying level in described atomic beam is absorbed is shared;
Described the first state selection module, described resonance absorption module, described detection module are located on the progress path of the described atomic beam that described transmitter module provides successively, and described processing module is electrically connected to described detection module.
In a kind of implementation of the utility model embodiment, described transmitter module comprises: with the sealed gas chamber of collimating eyelet with for the press device to described sealed gas chamber pressurization.
In the another kind of implementation of the utility model embodiment, described resonance absorption module comprises: the resonator cavity that the isotope atom of the atom in described atomic beam is housed.
In the another kind of implementation of the utility model embodiment, described detection module comprises: galvanometer.
In the another kind of implementation of the utility model embodiment, described device also comprises:
For adopting the magnetic deflection technology atom of the described atomic beam after described resonance absorption module to be carried out to the second state selection module of state selection;
Described the second state selection module is located on the progress path of described atomic beam, and described the second state selection module is located between described resonance absorption module and described detection module.
In the another kind of implementation of the utility model embodiment, described the first state selection module and described the second state selection module comprise respectively: the magnetic deflection instrument, described magnetic deflection instrument is located on the progress path of described atomic beam.
In the another kind of implementation of the utility model embodiment, described device also comprises:
The wave frequency signal function that meets Bohr condition for the compartment of terrain generation is in the coherent source of described resonance absorption module, and described coherent source is electrically connected to described resonance absorption module.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
By first adopting the magnetic deflection technology to carry out state selection to the atom in atomic beam, and detect the current value (not being subject to magnetic field and radiofrequency signal to do the used time, the current value of atomic beam after the resonance absorption module) of atomic beam after state selection, obtain the first current value; The isotope atom of the atom in the recycling atomic beam, absorption is the atom in atomic beam after state selection, and the current value (being subject to magnetic field and radiofrequency signal to do the used time, the current value of atomic beam after the resonance absorption module) of detection atomic beam after absorbing, obtain the second current value; Count the factor according to the first current value and the second current value calculating atomic transition, atomic transition is counted the factor for being illustrated in the resonant transition process, atom in low-lying level in atomic beam is absorbed the shared ratio of part, realized in the resonant transition process, the detection of the absorptivity of atom pair pumping material, process is easy, and device is simple.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation that the factors check device is counted in the transition based on the atomic energy level state selection that the utility model embodiment provides;
Fig. 2 is the schematic diagram of the magnetic deflection technology atomic beam state selection that provides of the utility model embodiment;
Fig. 3 is the schematic diagram of the atomic beam that provides of the utility model embodiment through transistion region;
Fig. 4 is the schematic diagram of the wave frequency signal that meets Bohr condition that provides of the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment
The utility model embodiment provides a kind of transition based on the atomic energy level state selection to count the factors check device, and referring to Fig. 1, device comprises: transmitter module 101, the first state selection module 102, resonance absorption module 103, detection module 104 and processing module 105; Wherein, transmitter module 101, for providing atomic beam; The first state selection module 102, carry out state selection for adopting the magnetic deflection technology to the atom of atomic beam; Resonance absorption module 103, for the isotope atom of the atom that utilizes above-mentioned atomic beam, absorb the atom in the atomic beam after state selection; Detection module 104, for detection of the current value of atomic beam after resonance absorption module 103, when being subject to magnetic field and radiofrequency signal, resonance absorption module 103 do not do the used time, and current value is the first current value, do the used time when resonance absorption module 103 is subject to magnetic field and radiofrequency signal, current value is the second current value; Processing module 105, for according to the first current value and the second current value calculating atomic transition, counting the factor, atomic transition is counted the factor for being illustrated in the resonant transition process, the ratio that the part that the atom in low-lying level in atomic beam is absorbed is shared;
The first state selection module 102, resonance absorption module 103, detection module 104 are located on the progress path of the atomic beam that transmitter module 101 provides successively, and processing module 105 is electrically connected to detection module 104.
Preferably, transmitter module 101 comprises with the sealed gas chamber of collimating eyelet with for the press device to the sealed gas chamber pressurization.Press device, by this sealed gas chamber pressurization, can complete the emission of atomic beam, thereby atomic beam is provided.
Wherein, above-mentioned state selection can refer to removes the high level atom in two kinds of energy levels of ground state comprised in atomic beam, due to ground state high level in atomic beam and low-lying level atom, during through magnetic field, the power difference be subject to, therefore used the magnetic deflection technology can remove the atom of high level.As Fig. 2, take the rubidium atom as example, by magnetic deflection, the atom of F=2 energy level is removed.
Wherein, resonance absorption module 103 comprises: the resonator cavity that the isotope atom of the atom in atomic beam is housed.
Further, above-mentioned detection module 104 includes but not limited to galvanometer.
Further, this device also comprises: for adopting the magnetic deflection technology, the atom of the atomic beam after resonance absorption module 103 is carried out to the second state selection module of state selection, the second state selection module is located on the progress path of atomic beam, and the second state selection module is located between resonance absorption module and detection module.Atomic beam is by twice state selection, makes the atomic beam after state selection purer, and measurement result is more accurate.
The first state selection module 102 and the second state selection module comprise respectively: the magnetic deflection instrument, the magnetic deflection instrument is located on the progress path of atomic beam.
Further, processing module is used for, and calculates atomic transition according to following mode and counts the factor: atomic transition is counted the factor=second current value ÷ the first current value.
As shown in Figure 3, be provided with the isotope atom of atomic beam Atom in transistion region (resonator cavity).Take the rubidium atom as example, and the atom of the basic only remaining F=1 state of the atomic beam after state selection, while entering transistion region, if now meet transition conditions, isotope atom in transistion region absorbs the F=1 state atom in the atomic beam after state selection so, resonates, and F=1 atomicity in atomic beam is reduced.
Further, device also comprises:
Produce and meet the wave frequency signal function of Bohr condition in the coherent source 106 of resonance absorption module 103 for compartment of terrain.Due to the length of transistion region, and the atomic beam after state selection may make above-mentioned resonance absorption not thorough through the time restriction of transistion region, is unfavorable for that follow-up transition counts the measurement of the factor, therefore added radiation source.The wave frequency signal f(that radiation source meets Bohr condition with △ t interval, certain hour interval output is as shown in Figure 4) act on transistion region, as shown in Figure 3, can extend the transistion region resonance absorption time like this, be conducive to improve the measuring accuracy that atomic transition is counted the factor, the length of transistion region also can do very shortly, avoided extending transistion region length for the time that extends atomic transition on the conventional art.
The utility model embodiment is by first adopting the magnetic deflection technology to carry out state selection to the atom in atomic beam, and after the detection state selection, the current value of atomic beam (is not subject to magnetic field and radiofrequency signal to do the used time, the current value of atomic beam after the resonance absorption module), obtain the first current value; The isotope atom of the atom in the recycling atomic beam, absorption is the atom in atomic beam after state selection, and the current value (being subject to magnetic field and radiofrequency signal to do the used time, the current value of atomic beam after the resonance absorption module) of detection atomic beam after absorbing, obtain the second current value; Count the factor according to the first current value and the second current value calculating atomic transition, atomic transition is counted the factor for being illustrated in the resonant transition process, atom in low-lying level in atomic beam is absorbed the shared ratio of part, realized in the resonant transition process, the detection of the absorptivity of atom pair pumping material, process is easy, and device is simple.
Above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. the factors check device is counted in the transition based on the atomic energy level state selection, it is characterized in that, described device comprises:
For the transmitter module of atomic beam is provided;
For adopting the magnetic deflection technology atom of described atomic beam to be carried out to the first state selection module of state selection;
For utilizing the isotope atom of atom of described atomic beam, absorb the resonance absorption module of the atom in the described atomic beam after state selection;
Current value for detection of described atomic beam after described resonance absorption module, when being subject to magnetic field and radiofrequency signal, described resonance absorption module do not do the used time, described current value is the first current value, when being subject to described magnetic field and described radiofrequency signal, described resonance absorption module does the used time, the detection module that described current value is the second current value;
For according to described the first current value and described the second current value, calculating the processing module that atomic transition is counted the factor, described atomic transition is counted the factor for being illustrated in resonant transition process, the ratio that the part that the atom in low-lying level in described atomic beam is absorbed is shared;
Described the first state selection module, described resonance absorption module, described detection module are located on the progress path of the described atomic beam that described transmitter module provides successively, and described processing module is electrically connected to described detection module.
2. device according to claim 1, is characterized in that, described transmitter module comprises: with the sealed gas chamber of collimating eyelet with for the press device to described sealed gas chamber pressurization.
3. device according to claim 1, is characterized in that, described resonance absorption module comprises: the resonator cavity that the isotope atom of the atom in described atomic beam is housed.
4. device according to claim 1, is characterized in that, described detection module comprises: galvanometer.
5. device according to claim 1, is characterized in that, described device also comprises:
For adopting the magnetic deflection technology atom of the described atomic beam after described resonance absorption module to be carried out to the second state selection module of state selection;
Described the second state selection module is located on the progress path of described atomic beam, and described the second state selection module is located between described resonance absorption module and described detection module.
6. device according to claim 5, is characterized in that, described the first state selection module and described the second state selection module comprise respectively: the magnetic deflection instrument, described magnetic deflection instrument is located on the progress path of described atomic beam.
7. according to the described device of claim 1-6 any one, it is characterized in that, described device also comprises:
The wave frequency signal function that meets Bohr condition for the compartment of terrain generation is in the coherent source of described resonance absorption module, and described coherent source is electrically connected to described resonance absorption module.
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| CN2013202889868U CN203337809U (en) | 2013-05-24 | 2013-05-24 | Atomic energy level state selection-based transition number factor measuring device |
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| CN2013202889868U CN203337809U (en) | 2013-05-24 | 2013-05-24 | Atomic energy level state selection-based transition number factor measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293494A (en) * | 2013-05-24 | 2013-09-11 | 江汉大学 | Atomic transition number factor measuring device and atomic transition number factor measuring method |
| CN111505474A (en) * | 2020-04-24 | 2020-08-07 | 中国科学院长春光学精密机械与物理研究所 | CO2Laser amplifier upper energy level service life testing device and method |
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2013
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293494A (en) * | 2013-05-24 | 2013-09-11 | 江汉大学 | Atomic transition number factor measuring device and atomic transition number factor measuring method |
| CN103293494B (en) * | 2013-05-24 | 2015-06-10 | 江汉大学 | Atomic transition number factor measuring device and atomic transition number factor measuring method |
| CN111505474A (en) * | 2020-04-24 | 2020-08-07 | 中国科学院长春光学精密机械与物理研究所 | CO2Laser amplifier upper energy level service life testing device and method |
| CN111505474B (en) * | 2020-04-24 | 2021-11-02 | 中国科学院长春光学精密机械与物理研究所 | CO2Laser amplifier upper energy level service life testing device and method |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20140524 |