CN206531978U - A kind of intervening atom gravity measuring device based on double material wave sources - Google Patents
A kind of intervening atom gravity measuring device based on double material wave sources Download PDFInfo
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- CN206531978U CN206531978U CN201621355638.8U CN201621355638U CN206531978U CN 206531978 U CN206531978 U CN 206531978U CN 201621355638 U CN201621355638 U CN 201621355638U CN 206531978 U CN206531978 U CN 206531978U
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Abstract
The utility model discloses a kind of intervening atom gravity measuring device based on double material wave sources；Belong to intervening atom and gravity survey technical field；Including：Vacuum cavity, for providing a sealing container for atom vapor, and preparation for cold atom and manipulates that to provide vacuum be (10‑8~10‑7) Pa vacuum environment.There are two cold atom cloud preparation structures and positioned at same one end of interference region；The utility model compact conformation, center of gravity is low in earth's surface working environment, and support is simple, and device has preferable stability；Two atomic groups share an exploring laser light and photodetector in detecting area vacuum chamber, reduce system complexity, it is suppressed that common mode detecting error；Interference is completed in same elongated shape vacuum chamber, and parcel magnetic shield material is convenient；There is no cold atom preparation structure between two atomic groups, device self-gravitation effect is small, and space has been reserved for additional gravitation source demarcation measurement result.The present apparatus only need to a set of detection system, magnetic field effect suppress, quantum projection noise it is small.
Description
Technical field
The utility model belongs to atomic interferometer and gravity survey technical field, more particularly, to one kind based on double things
The intervening atom gravity measuring device of matter wave source.
Background technology
High precise gravity survey extensive application in geophysics application.In resource exploration, acceleration of gravity and again
Power gradient data can be used for gravitational field inverting to obtain the Mass Distribution of underground, so as to provide important clue for resource exploration.
Acceleration of gravity is first-order derivative of the gravitional force to locus；And gravity gradient is gravitional force to space bit
The second derivative put, it is a second-order tensor, there is 9 components (wherein there was only 5 isolated components).Gradiometry needs
2 points of acceleration of gravity is poor in measurement space.Acceleration of gravity and gravity gradient can be realized by different methods.Than
As low-temperature superconducting gravity (gradient) instrument, rotating accelerometer gravity gradiometer, electrostatic suspension gravity (gradient) instrument and FG-5 are exhausted
To gravity (gradient) instrument, intervening atom gravity (gradient) instrument etc..Intervening atom gravity (gradient) instrument has potential sensitivity height, nothing
The advantages of null offset.
Cold atom interference technique is initially subordinate to culture and education in Zhu by U.S. Stamford in 1991 and awards group's realization.Due to microcosmic grain
Son have fluctuation, therefore microcosmic particle ripple bag different paths develop after overlap can interfere phenomenon.Using swash
Light manipulates atom, the ripple bag of atom occurred beam splitting, reflection, closed beam, it is possible to achieve the interference of atom.Atom has static matter
Amount, its ripple bag develops in gravitational field and influenceed by gravitional force, and the interferometric phase of intervening atom includes gravity.Therefore, atom
Interferometer can be for progress High-Precision Gravimeter Survey.
The diagonal components of gravity gradient tensor vertical direction can be measured by constructing two interferometers simultaneously in vertical direction.Institute
The instrument of construction is exactly intervening atom gravity gradiometer.It is advantageous that, it is by with a branch of two intervening atoms of laser steering, ground
It is common-mode noise to two interventional procedures that noise and laser phase noise this two main noises are shaken in face.Therefore gradiometry pair
This two noises are common mode inhibitions.
At present, the intervening atom gravity gradiometer scheme of measurement vertical direction diagonal components has following two.The first is
Trapping of Atoms (single material wave source) is cooled down using single Magneto-Optical Trap (Fig. 2), successively two atoms of upthrow (New Journal of
Physics 12,095009,2010) or one atom of upthrow, one atom is then divided into two (arXiv using laser:
1610.03832v2).This scheme is primarily limited to the speed that single Magneto-Optical Trap cools down Trapping of Atoms, mean unit time internal reference
Atom number with interference is less, causes quantum projection noise larger, limits the sensitivity of gradiometry.Second method is
Using two Magneto-Optical Traps come Trapping of Atoms (double material wave sources), there are two interference regions, interference region and Magneto-Optical Trap are alternately arranged.
(Phys.Rev.A, 65,033608,2002).This scheme causes device center of gravity high, and device stability is poor；Two interferometers
Between have a Three-Dimensional Magnetic light trap structures, cause instrument self-gravitation effect notable；Three-Dimensional Magnetic light trap structures between two interferometers
Much room is occupied, is unfavorable for demarcating gradient measurements using additional gravitational mass；Need two sets of detection devices and needs
Magnetic field shielding is carried out respectively.
Utility model content
Two kinds of gravity gradiometer structural schemes listed above, the first quantum projection noise is big, second of instrument center of gravity
High, self-gravitation effect is big, and is unfavorable for additional attraction quality demarcation, it is necessary to which two sets of detection devices to two interference regions, it is necessary to enter
Row magnetic field shielding.Not enough for these, the utility model provides a kind of new diatomic interferometer based on double material wave sources
Gravity measurement implementation.
The utility model provides a kind of intervening atom gravity measuring device based on double material wave sources, including：Vacuum chamber
Body, for providing a sealing container for atom vapor, and preparation for cold atom and manipulates that to provide vacuum be (10-8~10-7) Pa vacuum environment.
Further, the vacuum cavity includes：Interference region, detecting area, the first cold atom cloud preparation structure and second
Cold atom cloud preparation structure；The interference region is a slender type pipeline, for providing space for intervening atom process, and in institute
State interference region upper end and be provided with glass window for introducing Atomic Manipulation laser；The detecting area is used for the detection for atom
Journey provides space, is the cavity of multiwindow, and window is that exploring laser light and the fluorescence to be collected provide passage；The first cold original
Son group's preparation structure and the second cold atom cloud preparation structure are used to provide space for cooling Trapping of Atoms, are polyhedral structure,
And multiple windows are provided with, window is used to provide passage for cooling laser, and provides passage for atomic group when monitoring preparation；
A window for being used to provide passage for Atomic Manipulation laser is additionally provided with below the second cold atom cloud preparation structure.
The present apparatus have compact conformation, only need to that a set of detection system, magnetic field effect suppress, quantum projection noise is small,
The advantages of low self-gravitation effect of instrument center of gravity is small, demarcation facilitates.
Further, between the detecting area and the first cold atom cloud preparation structure, first cold atom cloud
Connected between preparation structure and the second cold atom cloud preparation structure by titanium alloy pipeline.
Further, the Atomic Manipulation laser is Raman light beams or Bragg light beams, for irradiated atoms, makes atom
The transition of generation stimulated Raman or Bragg diffraction, realize the beam splitting, reflection and conjunction beam of atomic wave.
Further, the intervening atom gravity measuring device also includes：Bias magnetic field coil, magnetic field shielding layer, light
Electric explorer, main cavity supporting plate, the first alkali metal shuttle, vavuum pump, the second alkali metal shuttle, laser mirror
With mother's Huo Zi coils of the anti-last of the twelve Earthly Branches；The bias magnetic field coil is the conductive coil being wrapped on the interference region arm, for producing edge
The magnetic field of vertical direction makes the magnetic sublevel of atom remove degeneracy；The magnetic field shielding layer is for the background environment in interference region of decaying
Magnetic field；Photodetector is used for the fluorescence for collecting atomic emissions, and is converted into electric signal；Main chamber body supporting plate is used to support
Main cavity；The vavuum pump is used to maintain the vacuum in main cavity；The first alkali metal shuttle and described first cold
Atomic group preparation structure is connected, and inside fills alkali metal atom sample, atomic gas is gone out to disperse, for providing working substance
Matter；The second alkali metal shuttle is connected with the second cold atom cloud preparation structure, and inside fills alkali metal atom sample, is used
Atomic gas is gone out with disperse, for providing operation material；The laser mirror is placed perpendicular to Atomic Manipulation laser, for inciting somebody to action
Atomic Manipulation laser original road reflects to form the laser to penetrating, and atom is operated；The anti-last of the twelve Earthly Branches mother Huo Zi coils are two and led to
Enter the coil of reverse current, in the first cold atom cloud preparation structure and make its diameter parallel in cooling laser in one
Beam, to produce magnetic field intensity zero point and magnetic field gradient at its center, so as to coordinate with cooling laser, imprisons former in center
Son.
Further, magnetic field shielding layer is made up of high-permeability material multi-lay winding.Wherein, high-permeability material can be with
For permalloy film, relative permeability is up to 105Level.
Further, photodetector is photoelectric tube or photomultiplier.
Further, vavuum pump includes ionic pump and getter pump, cold with the first cold atom cloud preparation structure and second
Pipeline communication between atomic group preparation structure.
The utility model has the advantages that：
(1) using two magneto-optic well structure Trapping of Atoms (material wave source), the speed increase of Trapping of Atoms is original 2
Times, therefore participating in that the atom number of interference is more in the unit interval, quantum projection noise is small, therefore the sensitivity of gradiometry can be with
Accomplish higher.
(2) two cold atom cloud preparation structures are closer to the distance, and positioned at the same one end of interference region, device compact overall structure,
Center of gravity is low in earth's surface working environment, and support can be conveniently realized using flat board, and device has preferable stability.
The interferometer that (3) two atomic groups are constituted, result of interference shares same exploring laser light and photoelectricity in detecting area
Detector, it is to avoid build two detection devices, reduces device complexity, and being capable of suppression common mode detecting error.
(4) interference is completed in same elongated shape interference region, and interference region is not separated by cold atom cloud preparation structure,
Magnetic screen is carried out to single interference region fairly simple；And tubular magnetic screen is more better by intermediate effect, therefore identical overall length
The interference region of degree, the single long interference region short interference region more separated than two shields more preferable to background magnetic field.
(5) interference region is an entirety, and centre does not have cold atom cloud preparation structure, and device sole mass is to atomic interferometer
Gravitational effect (self-gravitation effect) it is smaller, and interference when cold atom cloud between have abundance space.This makes in two atomic groups
The attraction quality of middle additional known quality distribution more facilitates to demarcate gradiometry result (such as resolution ratio).
Brief description of the drawings
Fig. 1 is the structure for the intervening atom gravity measuring device based on double material wave sources that the utility model embodiment is provided
Schematic diagram；
Fig. 2 is the structural representation for the three-dimensional Magneto-Optical Trap that the utility model embodiment is provided.
Wherein, 101 be interference region, 102 detecting areas, and 103 be the first cold atom cloud preparation structure, and 104 be the second cold atom
Group's preparation structure, 201 be bias magnetic field coil, and 202 be magnetic field shielding layer, and 203 be photodetector, and 204 be supporting plate, 205
It is vavuum pump for the first alkali metal shuttle, 206,207 be the second alkali metal shuttle, and 208 be laser mirror, 209
For mother's Huo Zi coils of the anti-last of the twelve Earthly Branches, a1 is the first atomic group, and a2 is the second atomic group, and L01 is Atomic Manipulation laser, and L02 swashs for detection
Light, L03 is the first cooling laser downwards, and L04 is the first cooling laser upwards, and L05 is the second cooling laser downwards, and L06 is the
Two cool down laser upwards.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
The utility model is related to one kind and utilizes atomic material wave interferometry terrestrial gravitation acceleration magnitude and gravity gradient value
Technology；Two Three-Dimensional Magnetic light trap structures (Fig. 2) are placed in same one end of interference region cavity 101 by the utility model, prepare simultaneously
Two cold atoms a1, a2.Two interventional procedures are completed simultaneously in interference cavity 101.Visited in same search coverage 102 with identical
Two atom a1 of light-metering L02 and photodetector 203 pair, the result of interference for the interferometer that a2 is constituted is detected.In earth's surface ring
In border, main vacuum cavity 101-104 support is realized using flat board 204.
Fig. 1 shows the intervening atom gravity measuring device based on double material wave sources that the utility model embodiment is provided
Structure, for convenience of description, illustrate only the part related to the utility model embodiment, details are as follows：
The intervening atom gravity measuring device based on double material wave sources that the utility model is provided is by ultrahigh vacuum degree cavity
101-104 and other accessory structures 201-209 is constituted；Laser beam L01-L06 and cold atom cloud a1, a2 are operation material.
Ultrahigh vacuum degree cavity 101-104 parts are the major mechanical structure of the present apparatus, and main function is for atom vapor
One sealing container is provided and preparation and manipulation for cold atom provide a ultrahigh vacuum degree environment, required vacuum one
As be 10-8-10-7Pa levels.Vacuum cavity selected materials typically have titanium alloy or devitrified glass.Now enter by taking titanium alloy as an example
Row brief description：It is same between cavity and cavity to be attached using titanium alloy pipeline；The place that laser beam passes through uses glass
Window；Connection between each separating component is sealed using anaerobic copper backing.
Vacuum cavity includes：Interference region 101, detecting area 102, the first cold atom cloud preparation structure 103, the second cold atom cloud
Preparation structure 104.Wherein, interference region 101 can be typically a slender type pipeline, and main function is carried for intervening atom process
For space.Its upper end is provided with glass window to introduce Atomic Manipulation laser L01；The outer winding bias magnetic field coil 201 of pipe, is used to
Producing magnetic field makes the magnetic sublevel of atom remove degeneracy；Magnetic field shielding layer 202 can be wound outside bias magnetic field coil 201, to shield
Cover external environment condition magnetic field.Detecting area 102 is generally the cavity of multiwindow, and it provides space for the detection process of atom, installed
Window be that the fluorescence to be collected of exploring laser light L02 and photodetector 203 provides passage.Cold atom cloud preparation structure 103,
104, generally polyhedral structure has many windows.It can provide space for cooling Trapping of Atoms, and window can be cooling laser
L03, L04, L05, L06 provide passage, while atomic group a1, a2 when also being prepared for monitoring provide passage.Detecting area 102 and
Between one cold atom cloud preparation structure 103, the first cold atom cloud preparation structure 103 and the second cold atom cloud preparation structure 104 it
Between connected by titanium alloy pipeline.The lower section of second cold atom cloud preparation structure 104 also has a window to be Atomic Manipulation laser L01
Passage is provided.
Laser beam L01-L06 is used for preparing and manipulating atomic group a1, a2.Wherein Atomic Manipulation laser L01 is generally Raman
Light beam or Bragg light beams, its effect is irradiated atoms, atom is occurred stimulated Raman transition or Bragg diffraction, is realized
Beam splitting, the reflection of atomic wave manipulate atom with closing beam, that is, and interfered.It can also be coupled in general Atomic Manipulation laser L01
Enter to remove light, for removing the atom of specific energy state.The principle for removing light is to make atom obtain photon momentum to accelerate, so that by
" blowing away ".The effect for detecting light L02 is irradiated atoms, makes atom-exciting transition, then spontaneous radiation goes out fluorescence.It is glimmering by detecting
Luminous intensity, can detect the number in not homomorphism atom, draw interferometric phase information, so as to derive that acceleration of gravity is believed
Breath.Cooling light L03-L06 is to carry out Doppler cooling to atom using the laser-correlation of red off resonance, while matching with externally-applied magnetic field
Conjunction can also realize the imprison of atom；Pump light composition is wherein also typically coupled with back, is because atom is during Doppler cooling
Meeting spontaneous radiation is called dark-state to that can not continue other atomic ground states of cooling procedure, and Dark atom can be returned by returning pump light
Pump is to the atomic ground state that can continue to Doppler cooling.Fig. 2 is exemplary three-dimensional magneto-optic well structure, cooling laser L03-L06 difference
Comprising three beams of laser, the laser beam pair to penetrating is formed between every two beam, and three pairs vertical two-by-two to the laser penetrated.In upthrow mistake
Journey, will change the laser frequency of cooling laser L03, L05 downwards, therefore cooling laser L03, L05 frequency will can be only downwards
Vertical control.
Accessory structure 201-209 is some for being attached on main cavity 101-104 or coordinating with main cavity 101-104
Gadget.They collectively form the entirety of this exemplary device with main cavity 101-104.Wherein, bias magnetic field coil 201 is winding
Conductive coil on the arm of interference region 101, the magnetic field to produce vertically makes the magnetic sublevel of atom remove degeneracy.Then
Using Atomic Manipulation laser L01 with going the magnetic sublevel of degeneracy to resonate, select and be projected as zero in vertical direction magnetic dipole moment
Atom.The influence of background magnetic field can so be reduced.Magnetic field shielding layer 202 is typically made up of high-permeability material multi-lay winding,
Effect is the background environment magnetic field in decay interference region 101.Photodetector 203 typically can be photoelectric tube or photomultiplier transit
Pipe, its window to detecting area 102 is installed, and effect is the fluorescence for collecting atomic emissions, and is converted into electric signal, convenient follow-up place
Reason and record.Main cavity supporting plate 204 is generally aluminum alloy material, and the outside supporting structure such as with section bar is connected, to support
Main cavity 101-104.Vavuum pump 206 generally comprises ionic pump and getter pump, with the first cold atom cloud preparation structure 103 and
Pipeline communication between two cold atom cloud preparation structures 104, to maintain the vacuum in main cavity 101-104, vacuum one
As be 10-8Pa levels.Alkali metal shuttle 205,207 is connected respectively at first, second cold atom cloud preparation structure, and inside is contained
There is alkali metal atom sample, atomic gas is gone out to disperse, operation material is provided for the present apparatus.Laser mirror 208 perpendicular to
Atomic Manipulation laser L01 is placed, and the former roads of Atomic Manipulation laser L01 to be reflected to form to the laser to penetrating, atom is grasped
Make.Anti- last of the twelve Earthly Branches mother Huo Zi coils 209 are two coils for being passed through reverse current, in the first cold atom cloud preparation structure 103
And make its diameter parallel a branch of in cooling laser L03, to produce magnetic field intensity zero point and magnetic field gradient at its center,
So as to coordinate with cooling laser L03, L04, in center Trapping of Atoms.
The example operation logic of the present apparatus and operating process are as follows：Alkali metal is waved from alkali metal shuttle 205,207
It is dealt into cold atom cloud preparation structure 103,104.Atom can be cooled down using Three-Dimensional Magnetic light trap structures as shown in Figure 2
Imprison.By taking one of three-dimensional Magneto-Optical Trap as an example, another Magneto-Optical Trap is identical with this.What three-dimensional Magneto-Optical Trap was fought each other by three Duis
Cooling laser L103, L104 and mother Huo Zi of anti-last of the twelve Earthly Branches coil 209 are constituted.Three pairs of laser are orthogonal, and atom is made in three directions
Slow down；Coil 209 and cooling laser L103, L104 coordinate Trapping of Atoms at center, form atomic group a1.
Cool down to imprison using three-dimensional Magneto-Optical Trap and arrive after enough atoms the frequency for reducing cooling laser L03, L05 downwards by original
Sub- upthrow.Predetermined height can be thrown by atomic group a1 on a2 by controlling the upthrow initial velocity of atom.Control two atomic groups
A1, a2 upthrow interval can make two atomic groups geo-stationary in upthrow flight course.Such two atomic groups a1, a2 relative to
Atomic Manipulation laser L01 Doppler's off resonance is identical, it is possible to manipulate two atomic groups simultaneously with a branch of Atomic Manipulation laser L01
A1, a2.
In atomic group a1, a2 can be carried out to atom simultaneously after entering interference region 101 using Atomic Manipulation laser L01
Energy level selects the selection with speed, is referred to as " state selection ".Energy level selection includes the hyperfine structure energy level and magnetic sublevel of atom
Selection.Producing magnetic field using bias magnetic field coil 201 makes atom magnetic sublevel move back degeneracy, regulation laser frequency and vertical direction magnetic
The resonance of quantum number null magnon energy level, they is chosen and by other atoms " blowing away ".The vertical direction quantity of magnetism
The atom pair magnetic field that subnumber is zero is insensitive, can reduce the influence in magnetic field.Speed selection is exactly the atom using friction speed
Doppler's mismatching angle that relative atom manipulates laser L01 is different, regulation Atomic Manipulation laser L01 frequency, intensity and it is lasting when
Between, select the atom of specific speed distribution.Can there be the VELOCITY DISTRIBUTION of atom in the vertical direction after speed selection with narrower
Beneficial to raising signal to noise ratio.
After state selection, manipulate atomic group a1, a2 using Atomic Manipulation laser L01 and complete interventional procedures simultaneously.Interventional procedures
Generally typical three pulses matter wave interference process.Atom in atomic group a1, a2 is a kind of matter wave, is utilized etc. between the time
Every three beams Atomic Manipulation laser L01 pulses make matter wave the beam splitting of ripple bag, reflection then close beam can just interfere phenomenon.
In the interferometric phase that interventional procedures are obtained, include acceleration of gravity information.
After the completion of interventional procedures, atom successively freely falls to detecting area 102, at this moment can be shone using exploring laser light L02
Penetrate atom, and using the Measurement atom fluorescence intensity of photodetector 203 so as to providing result of interference, show that atomic group a1, a2 exist
Acceleration of gravity information in interventional procedures.Atomic group a1 can be directly extracted using suitable method, a2 is in interventional procedures
In acceleration of gravity difference, and with good common-mode noise (interference laser phase noise, earth shock noise etc.) suppression
Make and use.It is also possible to extract the acceleration of gravity in atomic group a1, a2 interventional procedures respectively.According to atomic group a1, a2
Acceleration of gravity and gravity gradient information at two in interventional procedures can provide on vertical direction any point in certain limit
Gravity acceleration value.
In order that measurement result is more credible, in addition it is also necessary to demarcated using additional attraction quality.Known quality is distributed
High density mass placed close to interference region 101, according to newton law of gravitation, mass produce gravitational effect be known
's.Measure this additional gravitational effect with atomic interferometer to be contrasted with known gravitational effect, you can complete gravity (ladder
Degree) measurement demarcation.The position of calibration mass block can typically be moved, compare the variable quantity size of gravitational effect, can common mode fall
The influence of background gravitational field.
Finally, in ground surface environment, the support to main chamber body portion can be completed using supporting plate 203.In addition vavuum pump
206 can be fixed to realization on main supporting structure by support supports.
In summary, the present apparatus has compact conformation, only needs to that a set of detection system, magnetic field effect suppress, quantum is thrown
The advantages of shadow noise is small, instrument self-gravitation effect is small, demarcation facilitates.
As it will be easily appreciated by one skilled in the art that the foregoing is only preferred embodiment of the present utility model, not
To limit the utility model, all any modifications made within spirit of the present utility model and principle, equivalent substitution and change
Enter, should be included within protection domain of the present utility model.
Claims (7)
1. a kind of intervening atom gravity measuring device based on double material wave sources, it is characterised in that including：Vacuum cavity, is used for
A sealing container is provided for atom vapor, and preparation for cold atom and manipulates that to provide vacuum be (10-8~10-7) Pa
Vacuum environment；
The vacuum cavity includes：Interference region (101), detecting area (102), the first cold atom cloud preparation structure (103) and second
Cold atom cloud preparation structure (104)；
The interference region (101) is a slender type pipeline, for providing space for intervening atom process, and in the interference region
(101) upper end is provided with the glass window for introducing Atomic Manipulation laser (L01)；
The detecting area (102) is used to provide space for the detection process of atom, is the cavity of multiwindow, window is exploring laser light
Passage is provided with the fluorescence to be collected；
The first cold atom cloud preparation structure (103) and the second cold atom cloud preparation structure (104) are used for for cooling imprison original
Son provides space, is polyhedral structure, and is provided with multiple windows, and window is used to provide passage for cooling laser, and is prison
Survey atomic group when preparing and passage is provided；A use is additionally provided with below the second cold atom cloud preparation structure (104)
In the window that passage is provided for Atomic Manipulation laser.
2. intervening atom gravity measuring device as claimed in claim 1, it is characterised in that the detecting area (102) with it is described
Between first cold atom cloud preparation structure (103), the first cold atom cloud preparation structure (103) and second cold atom cloud
Connected between preparation structure (104) by titanium alloy pipeline.
3. intervening atom gravity measuring device as claimed in claim 1, it is characterised in that the Atomic Manipulation laser (L01)
For Raman light beams or Bragg light beams, for irradiated atoms, atom is occurred stimulated Raman transition or Bragg diffraction, realize
Beam splitting, reflection and the conjunction beam of atomic wave.
4. the intervening atom gravity measuring device as described in claim any one of 1-3, it is characterised in that the intervening atom weight
Force measuring device also includes：Bias magnetic field coil (201), magnetic field shielding layer (202), photodetector (203), main cavity support
Plate (204), the first alkali metal shuttle (205), vavuum pump (206), the second alkali metal shuttle (207), laser reflection
Mirror (208) and mother's Huo Zi coils of the anti-last of the twelve Earthly Branches (209)；
The bias magnetic field coil (201) is the conductive coil being wrapped on the interference region (101), for producing along vertical side
To magnetic field the magnetic sublevel of atom is removed degeneracy；
The magnetic field shielding layer (202) is for the background environment magnetic field in interference region (101) of decaying；
Photodetector (203) is used for the fluorescence for collecting atomic emissions, and is converted into electric signal；
Main chamber body supporting plate (204) is used to support main cavity (101-104)；
The vavuum pump (206) is used to maintain the vacuum in main cavity (101-104)；
The first alkali metal shuttle (205) connects with the first cold atom cloud preparation structure (103), and inside fills alkali
Metallic atom sample, atomic gas is gone out to disperse, for providing operation material；
The second alkali metal shuttle (207) connects with the second cold atom cloud preparation structure, and inside fills alkali metal atom
Sample, atomic gas is gone out to disperse, for providing operation material；
The laser mirror (208) is placed perpendicular to Atomic Manipulation laser (L01), for Atomic Manipulation laser (L01) is former
Road reflects to form the laser to penetrating, and atom is operated；
Anti- last of the twelve Earthly Branches mother's Huo Zi coils (209) are two coils for being passed through reverse current, prepare and tie installed in the first cold atom cloud
On structure (103) and make its diameter parallel a branch of in cooling laser (L03), to produce magnetic field intensity zero point at its center
And magnetic field gradient, so as to coordinate with cooling laser (L03, L04), in center Trapping of Atoms.
5. intervening atom gravity measuring device as claimed in claim 4, it is characterised in that the magnetic field shielding layer (202) by
High-permeability material multi-lay winding is constituted.
6. intervening atom gravity measuring device as claimed in claim 4, it is characterised in that the photodetector (203) is
Photoelectric tube or photomultiplier.
7. intervening atom gravity measuring device as claimed in claim 4, it is characterised in that the vavuum pump (206) include from
Pipe between sub- pump and getter pump, with the first cold atom cloud preparation structure (103) and the second cold atom cloud preparation structure (104)
Road is connected.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106772652A (en) * | 2016-12-08 | 2017-05-31 | 华中科技大学 | A kind of intervening atom gravity measuring device based on double material wave sources |
| CN108169804A (en) * | 2017-12-29 | 2018-06-15 | 中国人民解放军国防科技大学 | Atomic interference gravity gradient measurement method and device based on two-dimensional cross grating and similar pyramid structure |
| CN109116275A (en) * | 2018-07-16 | 2019-01-01 | 北京航空航天大学 | A method of using atomic interferometer precise measurement under slight distance two magnetic field consistency |
| CN113672002A (en) * | 2021-08-23 | 2021-11-19 | 九江学院 | Cold atom gravimeter active vibration isolation control method based on nominal model |
| US11181467B1 (en) * | 2020-07-01 | 2021-11-23 | East China Normal University Beijing | All-glass optical atom-chamber with a vacuum higher than 1×10-8 Pa and manufacturing method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772652A (en) * | 2016-12-08 | 2017-05-31 | 华中科技大学 | A kind of intervening atom gravity measuring device based on double material wave sources |
| CN106772652B (en) * | 2016-12-08 | 2019-06-18 | 华中科技大学 | A kind of intervening atom gravity measuring device based on double substance wave sources |
| CN108169804A (en) * | 2017-12-29 | 2018-06-15 | 中国人民解放军国防科技大学 | Atomic interference gravity gradient measurement method and device based on two-dimensional cross grating and similar pyramid structure |
| CN109116275A (en) * | 2018-07-16 | 2019-01-01 | 北京航空航天大学 | A method of using atomic interferometer precise measurement under slight distance two magnetic field consistency |
| CN109116275B (en) * | 2018-07-16 | 2020-11-03 | 北京航空航天大学 | Method for accurately measuring consistency of two magnetic fields at small distance |
| US11181467B1 (en) * | 2020-07-01 | 2021-11-23 | East China Normal University Beijing | All-glass optical atom-chamber with a vacuum higher than 1×10-8 Pa and manufacturing method thereof |
| CN113672002A (en) * | 2021-08-23 | 2021-11-19 | 九江学院 | Cold atom gravimeter active vibration isolation control method based on nominal model |
| CN113672002B (en) * | 2021-08-23 | 2022-03-22 | 九江学院 | Cold atom gravimeter active vibration isolation control method based on nominal model |
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