CN106772652B - A kind of intervening atom gravity measuring device based on double substance wave sources - Google Patents
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Abstract
The invention discloses a kind of intervening atom gravity measuring devices based on double substance wave sources；Belong to intervening atom and gravity survey technical field；It include: vacuum cavity, it is (10 that the preparation and manipulation for providing a sealing container for atom vapor, and for cold atom, which provide vacuum degree,‑8~10‑7) Pa vacuum environment.There are two cold atom cloud preparation structure and positioned at the same end of interference region；Structure of the invention is compact, and 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 the same elongated shape vacuum chamber, and package magnetic shield material is convenient；There is no cold atom preparation structure between two atomic groups, device self-gravitation effect is small, and demarcates measurement result for additional gravitation source and reserved space.The present apparatus only needs a set of detection system, magnetic field effect to inhibit, quantum projection noise is small.
Description
Technical field
The invention belongs to atomic interferometers and gravity survey technical field, more particularly, to one kind based on double matter waves
The intervening atom gravity measuring device in source.
Background technique
High precise gravity survey extensive application in geophysics application.In resource exploration, acceleration of gravity and again
Force gradient data can be used for gravitational field inverting to obtain the Mass Distribution of underground, to provide important clue for resource exploration.
Acceleration of gravity is first-order derivative of the gravitional force to spatial position；And gravity gradient is gravitional force to space bit
The second derivative set, it is a second-order tensor, there is 9 components (wherein there was only 5 isolated components).Gradiometry needs
The acceleration of gravity for measuring two o'clock in space is poor.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 high sensitivity, nothing
The advantages that 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 has fluctuation, therefore the coincidence after different paths develop of the wave packet of microcosmic particle can interfere phenomenon.Using swash
Light manipulates atom, makes the wave packet of atom that beam splitting occur, reflection, close beam, the interference of atom may be implemented.Atom has static matter
Amount, wave packet develops in gravitational field to be influenced by gravitional force, and the interferometric phase of intervening atom includes gravity item.Therefore, atom
Interferometer can be used to carry out 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 the same as two intervening atoms of a branch of laser steering, ground
Noise is shaken in face and laser phase noise this two main noises are common-mode noises to two interventional procedures.Therefore gradiometry pair
This two noises are common mode inhibitions.
Currently, the intervening atom gravity gradiometer scheme of measurement vertical direction diagonal components has following two.The first is
Trapping of Atoms (single substance 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, then using laser by an atom be divided into two (arXiv:
1610.03832v2).This scheme is primarily limited to the speed of the cooling Trapping of Atoms of single Magneto-Optical Trap, mean unit time internal reference
It is less with the atom number of interference, cause quantum projection noise larger, limits the sensitivity of gradiometry.Second method is
Using two Magneto-Optical Traps come Trapping of Atoms (double substance wave sources), there are two interference regions, and 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 significant；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.
Summary of the invention
Two kinds of gravity gradiometer structural schemes listed above, the first quantum projection noise is big, second of instrument center of gravity
It is high, self-gravitation effect is big, and be unfavorable for it is additional attract quality demarcation, need two sets of detection devices, need to two interference regions into
Row magnetic field shielding.For these deficiencies, the present invention provides a kind of new diatomic interferometer gravity based on double substance wave sources
Measure implementation.
The present invention provides a kind of intervening atom gravity measuring devices based on double substance wave sources, comprising: vacuum cavity is used
It is (10 that preparation and manipulation in providing a sealing container for atom vapor, and for cold atom, which provide vacuum degree,-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
It states interference region upper end and is provided with glass window for introducing Atomic Manipulation laser；The detection that the detecting area is used for as atom
Journey provides space, is the cavity of multiwindow, and window provides channel for exploring laser light and the fluorescence to be collected；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 channel for cooling laser, and provides channel for atomic group when monitoring preparation；?
One is additionally provided with below the second cold atom cloud preparation structure for providing the window in channel for Atomic Manipulation laser.
The present apparatus have it is compact-sized, only need a set of detection system, magnetic field effect to inhibit, quantum projection noise is small,
The advantages that low self-gravitation effect of instrument center of gravity is small, calibration facilitates.
Further, between the detecting area and the first cold atom cloud preparation structure, first cold atom cloud
It is connected by titanium alloy pipeline between preparation structure and the second cold atom cloud preparation structure.
Further, the Atomic Manipulation laser is Raman light beam or Bragg light beam, is used for irradiated atoms, makes atom
Stimulated Raman transition or Bragg diffraction occurs, realizes the beam splitting, reflection and conjunction beam of atomic wave.
Further, the intervening atom gravity measuring device further include: bias magnetic field coil, magnetic field shielding layer, light
Electric explorer, main cavity support plate, the first alkali metal sample container, vacuum pump, the second alkali metal sample container, laser mirror
With anti-last of the twelve Earthly Branches mother Huo Zi coil；The bias magnetic field coil is the conductive coil being wrapped on the interference region arm, for generating 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 to collect the fluorescence of atomic emissions, and is converted into electric signal；Main chamber body support plate is used to support
Main cavity；The vacuum pump is used to maintain the vacuum degree in main cavity；The first alkali metal sample container and described first cold
The connection of atomic group preparation structure, inside fills alkali metal atom sample, goes out atomic gas to disperse, for providing working substance
Matter；The second alkali metal sample container is connected to the second cold atom cloud preparation structure, and inside fills alkali metal atom sample, is used
Go out atomic gas with disperse, for providing operation material；The laser mirror is placed perpendicular to Atomic Manipulation laser, and being used for will
Atomic Manipulation laser original road is reflected to form to the laser penetrated, and is operated to atom；The anti-last of the twelve Earthly Branches mother Huo Zi coil is two logical
The coil for entering reverse current, one for being mounted in the first cold atom cloud preparation structure and making that its axis is parallel in cooling laser
Beam, to generate magnetic field strength zero point and magnetic field gradient at its center, to be imprisoned at center former with cooling laser cooperation
Son.
Further, magnetic field shielding layer is made of high-permeability material multi-lay winding.Wherein, high-permeability material can be with
For permalloy film, relative permeability is up to 105It is horizontal.
Further, photodetector is photoelectric tube or photomultiplier tube.
Further, vacuum pump includes ionic pump and getter pump, cold with the first cold atom cloud preparation structure and second
Pipeline connection between atomic group preparation structure.
The present invention has the advantages that:
(1) two magneto-optic well structure Trapping of Atoms (substance wave source) are used, it is original 2 that the speed of Trapping of Atoms, which increases,
Times, therefore the atom number that interference is participated in the unit time is more, quantum projection noise is small, therefore the sensitivity of gradiometry can be with
Accomplish higher.
(2) two cold atom cloud preparation structures are closer, and are located at interference region the same end, device compact overall structure,
Center of gravity is low in earth's surface working environment, realizes support using plate with can be convenient, device has preferable stability.
The interferometer that (3) two atomic groups are constituted, result of interference share the same exploring laser light and photoelectricity in detecting area
Detector avoids and builds two detection devices, reduce device complexity, and is able to suppress common mode detecting error.
(4) interference is completed in the same elongated shape interference region, and interference region is not separated by cold atom cloud preparation structure,
It is fairly simple that magnetic screen is carried out to single interference region；And tubular magnetic screen is more leaning on intermediate effect better, therefore identical overall length
The interference region of degree, single long interference region shield background magnetic field than two sseparated short interference regions more preferable.
(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 have sufficient space between cold atom cloud when interfering.This makes in two atomic groups
The attraction quality of the additional known quality distribution in centre is more convenient to demarcate gradiometry result (such as resolution ratio).
Detailed description of the invention
Fig. 1 is the structural representation of the intervening atom gravity measuring device provided in an embodiment of the present invention based on double substance wave sources
Figure；
Fig. 2 is the structural schematic diagram of three-dimensional Magneto-Optical Trap provided in an embodiment of the present invention.
Wherein, 101 be interference region, and 102 detecting areas, 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 support plate, 205
For the first alkali metal sample container, 206 be vacuum pump, and 207 be the second alkali metal sample container, and 208 be laser mirror, 209
For anti-last of the twelve Earthly Branches mother Huo Zi coil, a1 is the first atomic group, and a2 is the second atomic group, and L01 is Atomic Manipulation laser, and L02 is that detection swashs
Light, L03 are the first cooling laser downwards, and L04 is the first cooling laser upwards, and L05 is the second cooling laser downwards, L06 the
Two upward cooling laser.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention relates to a kind of skills using atomic material wave interferometry terrestrial gravitation acceleration value and gravity gradient value
Art；Two Three-Dimensional Magnetic light trap structures (Fig. 2) are placed in the same end of interference region cavity 101 by the present invention, while preparing two cold originals
Sub- a1, a2.Two interventional procedures are completed at the same time in interference cavity 101.In the same search coverage 102 with identical detection light L02
With photodetector 203 to two atom a1, the result of interference for the interferometer that a2 is constituted is detected.In ground surface environment, benefit
The support of main vacuum cavity 101-104 is realized with plate 204.
Fig. 1 shows the knot of the intervening atom gravity measuring device provided in an embodiment of the present invention based on double substance wave sources
Structure, for ease of description, only parts related to embodiments of the present invention are shown, and details are as follows:
Intervening atom gravity measuring device provided by the invention based on double substance wave sources is by ultra-high vacuum cavity 101-
104 and other accessory structures 201-209 is formed；Laser beam L01-L06 and cold atom cloud a1, a2 are operation material.
The part ultra-high vacuum cavity 101-104 is the major mechanical structure of the present apparatus, and main function is for atom vapor
One sealing container and preparation for cold atom are provided and manipulation provides a ultra-high vacuum environment, required vacuum degree one
As be 10-8-10-7Pa is horizontal.Vacuum cavity selected materials generally have titanium alloy or devitrified glass.Now by taking titanium alloy as an example into
Row brief description: it is equally attached using titanium alloy pipeline between cavity and cavity；The place that laser beam passes through uses glass
Window；Connection between each separation unit 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 generally a slender type pipeline, and main function is mentioned for intervening atom process
For space.The upper end is equipped with glass window to introduce Atomic Manipulation laser L01；Pipe is outer to wind bias magnetic field coil 201, to
Generating magnetic field makes the magnetic sublevel of atom remove degeneracy；It can wind magnetic field shielding layer 202 outside bias magnetic field coil 201, to shield
Cover external environment magnetic field.Detecting area 102 is generally the cavity of multiwindow, provides space for the detection process of atom, is installed
Window provide channel for exploring laser light L02 and the fluorescence to be collected of photodetector 203.Cold atom cloud preparation structure 103,
There are many windows in 104, generally polyhedral structure.It can provide space for cooling Trapping of Atoms, and window can be cooling laser
L03, L04, L05, L06 provide channel, while also providing channel for atomic group a1, a2 when monitoring preparation.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.Second cold atom cloud preparation structure, 104 lower section is Atomic Manipulation laser L01 there are one window
Channel is provided.
Laser beam L01-L06 is used to prepare and manipulate atomic group a1, a2.Wherein Atomic Manipulation laser L01 is generally Raman
Light beam or Bragg light beam, effect is irradiated atoms, makes atom that stimulated Raman transition or Bragg diffraction occur, and is realized
Beam splitting, reflection and the conjunction beam of atomic wave, i.e. manipulation atom are interfered.It can also be coupled in general Atomic Manipulation laser L01
Into light is removed, for removing the atom of specific energy state.Remove light principle be make atom obtain photon momentum accelerate, thus 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, obtain interferometric phase information, to derive that acceleration of gravity is believed
Breath.Cooling light L03-L06 is to carry out Doppler cooling to atom using red detuning laser-correlation, while matching with externally-applied magnetic field
Close the imprison for being also able to achieve atom；It is generally wherein also coupled with back pump light ingredient, is because atom is during Doppler cooling
Meeting spontaneous radiation is called dark-state to other atomic ground states that can not continue cooling procedure, and Dark atom can be returned by returning pump light
Pump 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, formed between every two beam to the laser beam pair penetrated, and three pairs vertical two-by-two to the laser penetrated.In upthrow mistake
The frequency that journey will change the laser frequency for cooling down laser L03, L05 downwards, therefore cool down laser L03, L05 downwards is wanted can be only
Vertical control.
Accessory structure 201-209 is to be attached on main cavity 101-104 or cooperate with main cavity 101-104 some
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 101 arm of interference region makes the magnetic sublevel of atom remove degeneracy to generate magnetic field along the vertical direction.Then
Using Atomic Manipulation laser L01 and the magnetic sublevel of degeneracy is gone to resonate, selects and be projected as zero in vertical direction magnetic dipole moment
Atom.It can reduce the influence of background magnetic field in this way.Magnetic field shielding layer 202 is generally made of high-permeability material multi-lay winding,
Effect is the background environment magnetic field in decaying interference region 101.Photodetector 203 generally can be photoelectric tube or photomultiplier transit
Pipe installs the window of detecting area 102, and effect is the fluorescence for collecting atomic emissions, and is converted into electric signal, facilitates subsequent place
Reason and record.Main cavity support plate 204 is generally aluminum alloy material, and outside is connected with supporting structures such as profiles, to support
Main cavity 101-104.Vacuum pump 206 generally comprises ionic pump and getter pump, with the first cold atom cloud preparation structure 103 and
Pipeline connection between two cold atom cloud preparation structures 104, to maintain the vacuum degree in main cavity 101-104, vacuum degree one
As be 10-8Pa is horizontal.Alkali metal sample container 205,207 is connected to respectively at the first, second cold atom cloud preparation structure, and inside is contained
There is alkali metal atom sample, go out atomic gas to disperse, provides operation material for the present apparatus.Laser mirror 208 perpendicular to
Atomic Manipulation laser L01 is placed, and reflecting to form on Atomic Manipulation laser L01 original road to the laser penetrated, is grasped to atom
Make.Anti- last of the twelve Earthly Branches mother Huo Zi coil 209 is two coils for being passed through reverse current, is mounted in the first cold atom cloud preparation structure 103
And it is a branch of in cooling laser L03 to be parallel to its axis, to generate magnetic field strength zero point and magnetic field gradient at its center,
To cooperate with cooling laser L03, L04, the Trapping of Atoms at center.
The example operation logic of the present apparatus and operating process are as follows: alkali metal is waved from alkali metal sample container 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 anti-last of the twelve Earthly Branches mother Huo Zi coil 209 composition.Three pairs of laser are orthogonal, make atom in three directions
Slow down；Coil 209 and cooling laser L103, L104 cooperate Trapping of Atoms at center, form atomic group a1.
It will be former using the frequency for reducing cooling laser L03, L05 downwards after the cooling imprison to enough atoms of three-dimensional Magneto-Optical Trap
Sub- upthrow.Atomic group a1 can be thrown scheduled height on a2 by the upthrow initial velocity for controlling atom.Control two atomic groups
The upthrow interval of a1, a2 can make two atomic groups opposing stationary in upthrow flight course.Such two atomic groups a1, a2 relative to
The Doppler of Atomic Manipulation laser L01 is detuning identical, so that it may manipulate two atomic groups simultaneously with a branch of Atomic Manipulation laser L01
A1, a2.
It can use Atomic Manipulation laser L01 after atomic group a1, a2 enter interference region 101 simultaneously to carry out atom
The selection of energy level selection and speed, referred to as " state selection ".Energy level selection includes the hyperfine structure energy level and magnetic sublevel of atom
Selection.Generating magnetic field using bias magnetic field coil 201 makes atom magnetic sublevel move back degeneracy, adjusts laser frequency and vertical direction magnetic
Quantum number null magnon energy level resonance chooses them 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
The Doppler mismatching angle that relative atom manipulates laser L01 is different, adjust the frequency of Atomic Manipulation laser L01, intensity and it is lasting when
Between, select the atom of specific speed distribution.The VELOCITY DISTRIBUTION of atom in the vertical direction can be narrower after speed selection, has
Conducive to raising signal-to-noise ratio.
After state selection, atomic group a1 is manipulated using Atomic Manipulation laser L01, a2 is completed at the same time interventional procedures.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 times
Every three beams Atomic Manipulation laser L01 pulse make matter wave the beam splitting of wave packet, reflection then close beam can interfere phenomenon.
It include acceleration of gravity information in the interferometric phase that interventional procedures obtain.
After the completion of interventional procedures, atom successively freely falls to detecting area 102, at this moment can use exploring laser light L02 photograph
Atom is penetrated, and show that atomic group a1, a2 exist using 203 Measurement atom fluorescence intensity of photodetector to provide result of interference
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 there is good common-mode noise (interference laser phase noise, earth shock noise etc.) suppression
Production is used.It is also possible to atomic group a1 is extracted respectively, the acceleration of gravity in a2 interventional procedures.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 a certain range
Gravity acceleration value.
In order to keep measurement result more credible, it is also necessary to be demarcated using additional attraction quality.Known quality is distributed
High density mass block close to interference region 101 place, according to newton law of gravitation, mass block generate gravitational effect be known
's.This additional gravitational effect is measured with atomic interferometer to compare with known gravitational effect, and gravity (ladder can be completed
Degree) measurement calibration.The variable quantity size of gravitational effect is compared in the position that calibration mass block can generally be moved, can common mode fall
The influence of background gravitational field.
Finally, the support to main chamber body portion can be completed using support plate 203 in ground surface environment.Furthermore vacuum pump
206 can be fixed by the bracket realization support on main supporting structure.
In conclusion the present apparatus have it is compact-sized, only need that a set of detection system, magnetic field effect inhibit, quantum is thrown
The advantages that shadow noise is small, instrument self-gravitation effect is small, calibration facilitates.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of intervening atom gravity measuring device based on double substance wave sources characterized by comprising vacuum cavity is used for
A sealing container is provided for atom vapor, and it is 10 that preparation for cold atom and manipulation, which provide vacuum degree,-8~10-7Pa's is true
Altitude；
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)；And intervening atom process is same elongated
It is completed in shape interference region (101)；
The detecting area (102) is used to provide space for the detection process of two intervening atom results, is the cavity of multiwindow, window
Mouth provides channel for exploring laser light and the fluorescence to be collected；
The first cold atom cloud preparation structure (103) and the second cold atom cloud preparation structure (104) are located at the interference region
(101) the same end is polyhedral structure, and be provided with multiple windows, window for providing space for cooling Trapping of Atoms
For providing channel for cooling laser, and channel is provided for atomic group when monitoring preparation；It is prepared in second cold atom cloud
One is additionally provided with below structure (104) for providing the window in channel for Atomic Manipulation laser.
2. intervening atom gravity measuring device as described in claim 1, which is characterized 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
Preparation structure is connected by titanium alloy pipeline between (104).
3. intervening atom gravity measuring device as described in claim 1, which is characterized in that the Atomic Manipulation laser (L01)
For Raman light beam or Bragg light beam, irradiated atoms are used for, make atom that stimulated Raman transition or Bragg diffraction occur, are realized
Beam splitting, reflection and the conjunction beam of atomic wave.
4. intervening atom gravity measuring device as described in any one of claims 1-3, which is characterized in that the intervening atom weight
Force measuring device further include: bias magnetic field coil (201), magnetic field shielding layer (202), photodetector (203), main cavity support
Plate (204), the first alkali metal sample container (205), vacuum pump (206), the second alkali metal sample container (207), laser reflection
Mirror (208) and anti-last of the twelve Earthly Branches mother Huo Zi coil (209)；
The bias magnetic field coil (201) is the conductive coil being wrapped on the interference region (101) arm, for generating along vertical
The magnetic field in direction makes the magnetic sublevel of atom remove degeneracy；
The magnetic field shielding layer (202) is used for the background environment magnetic field decayed in interference region (101)；
Photodetector (203) is used to collect the fluorescence of two atomic groups (a1, a2) transmitting, and is converted into electric signal；
Main chamber body support plate (204) is used to support main cavity (101-104)；
The vacuum pump (206) is used to maintain the vacuum degree in main cavity (101-104)；
The first alkali metal sample container (205) is connected to the first cold atom cloud preparation structure, and inside fills alkali metal
Atomic sample goes out atomic gas to disperse, for providing operation material；
The second alkali metal sample container (207) is connected to the second cold atom cloud preparation structure, and inside fills alkali metal atom
Sample goes out atomic gas 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 is reflected to form to the laser penetrated, and is operated to atom；
The anti-last of the twelve Earthly Branches mother Huo Zi coil (209) is two coils for being passed through reverse current, is mounted on the first cold atom cloud preparation knot
On structure (103) and to be parallel to its axis a branch of in cooling laser (L03), to generate magnetic field strength zero point at its center
And magnetic field gradient, thus with cooling laser (L03, L04) cooperation, the Trapping of Atoms at center.
5. intervening atom gravity measuring device as claimed in claim 4, which is characterized 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, which is characterized in that the photodetector (203) is
Photoelectric tube.
7. intervening atom gravity measuring device as claimed in claim 4, which is characterized in that the photodetector (203) is
Photomultiplier tube.
8. intervening atom gravity measuring device as claimed in claim 4, which is characterized in that the vacuum pump (206) include from
Son pump and the pipe between getter pump, with the first cold atom cloud preparation structure (103) and the second cold atom cloud preparation structure (104)
Road connection.
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| CN107152925B (en) * | 2017-06-22 | 2019-11-12 | 华中科技大学 | A kind of quantum dipmeter based on intervening atom |
| CN108121015B (en) * | 2018-01-25 | 2024-03-29 | 中国科学技术大学 | Atomic population detection system |
| CN108267791B (en) * | 2018-02-09 | 2023-10-20 | 中国科学技术大学 | Magnetic field system for atomic interferometer probe |
| CN109298457B (en) * | 2018-11-20 | 2020-05-12 | 中国科学技术大学 | Vibration noise correction compensation method suitable for atomic interference gravimeter |
| CN109799542B (en) * | 2019-02-26 | 2020-04-14 | 中国人民解放军军事科学院国防科技创新研究院 | System and method for measuring full tensor of atomic interference gravity gradient |
| CN110596773A (en) * | 2019-10-23 | 2019-12-20 | 中国人民解放军军事科学院国防科技创新研究院 | Miniaturized atomic interference gravimeter vacuum device adopting folding light path |
| CN110888175A (en) * | 2019-11-25 | 2020-03-17 | 上海交通大学 | Double-material wave source interference measuring device based on optical cavity |
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