CN112556676A - Device for adjusting motion parameters of atomic fountain - Google Patents
Device for adjusting motion parameters of atomic fountain Download PDFInfo
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- CN112556676A CN112556676A CN202011372103.2A CN202011372103A CN112556676A CN 112556676 A CN112556676 A CN 112556676A CN 202011372103 A CN202011372103 A CN 202011372103A CN 112556676 A CN112556676 A CN 112556676A
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- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
- G01C21/16—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
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Abstract
The invention provides a device for adjusting the motion parameters of an atomic fountain, which comprises: the system comprises an upper three-beam trapping optical module, a lower three-beam trapping optical module and a movable six-dimensional platform module; the upper three trapping optical modules are used for emitting the upper three trapping cooling light beams and fixing an upper reverse Helmholtz coil; the lower three trapping optical modules are used for emitting the lower three trapping cooling light beams, fixing the lower reverse Helmholtz coil and emitting one beam of pumping-back light; the movable six-dimensional platform module comprises a rotary table part, a two-dimensional translation table part, a lifting table part and a two-dimensional pitching table part; the turntable part is used for adjusting the initial speed direction of the atomic group; the two-dimensional translation table part and the lifting table part are used for adjusting the initial position of the atomic group; the two-dimensional pitching platform part is used for adjusting the initial speed direction of the atomic group. The invention can realize the accurate control of three-dimensional translation (X, Y, Z) and three-dimensional rotation (omega x, omega y and omega z) of atomic groups in the fountain.
Description
Technical Field
The invention belongs to the field of atomic fountain motion parameter adjusting devices, and particularly relates to a device for adjusting atomic fountain motion parameters.
Background
Cold atom physics is one of the hottest and the most rapid development fields of physics since the last 90 s, and thanks to the mature development of laser cooling technology, an interferometer realized by using cold atoms is widely applied to gravity and gravity gradient measurement, rotation measurement, ultra-fine structure constant measurement, equivalence principle inspection, gravitational wave detection and other aspects. The atomic fountain is a most basic part in an atomic interference experiment, and generally realizes cooling trapping on atomic groups by utilizing the cooperation of laser and a magnetic field, namely atoms are stably loaded in a potential well to prevent the atoms from diffusing, the potential well is a potential energy closed region in which the atomic groups are subjected to inward action in all directions at any position, and the atomic kinetic energy is lower than the depth of the potential well and is trapped in a fixed position in the potential well. Then the atomic groups need to be thrown out, and interference and detection are realized in the flying process. However, if the initial position, the velocity and the upward throwing direction of the atom fountain come in and go out of the design reference value, the flight trajectory of the atoms deviates more or less, which may interfere with the experiment and affect the final measurement accuracy, which is particularly significant for the throwing experiment. In the butt-polishing experiment, two atom fountains are usually provided, if the flight trajectories of atoms on two sides are not coincident, the difference effect is influenced, and the efficiency of laser pulse is also nonuniform, so that the contrast ratio of interference fringes is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a device for adjusting the motion parameters of an atom fountain, and aims to solve the problem that the initial position, the speed and the upward throwing direction of the atom fountain cannot be precisely controlled.
In order to achieve the above object, the present invention provides a device for adjusting the motion parameters of an atomic fountain, comprising: the device comprises an upper three-beam trapping optical module, a lower three-beam trapping optical module, a vacuum container and a movable six-dimensional platform module;
the upper three trapping optical modules are structurally a cover with a downward opening, three beam expander windows are arranged on the cover to fix the three upper trapping optical beam expanders, and a coil window is further arranged to fix an upper reverse Helmholtz coil;
the lower three trapping optical modules are structurally a cover with an upward opening, three beam expander windows are arranged on the cover to fix the three lower trapping optical beam expanders, and a coil window is also arranged to fix a lower reverse Helmholtz coil; the upper three trapping optical modules are fixedly positioned on the lower three trapping optical modules, and the opening directions of the two covers are symmetrical; three beam expander windows of the upper three trapping optical modules and three beam expander windows of the lower three trapping optical modules are respectively arranged in a pairwise symmetry manner, and coil windows of the upper three trapping optical modules and coil windows of the lower three trapping optical modules are arranged in a symmetry manner;
the vacuum container contains atomic groups which are arranged inside the upper three-beam trapping optical module and the lower three-beam trapping optical module; when three upper trapping light beam expanders and upper anti-Helmholtz coils are assembled on the upper three trapping light modules and three lower trapping light beam expanders and lower anti-Helmholtz coils are assembled on the lower three trapping light modules, six trapping light beams and magnetic fields provided by the two anti-Helmholtz coils are generated by the three upper trapping light beam expanders and the three lower trapping light beam expanders and act on atomic groups in a vacuum container, a magneto-optical trap is generated, the atomic groups are trapped in the vacuum container, and atoms move as a fountain after the atomic groups in the magneto-optical trap are polished upwards;
the movable six-dimensional platform module includes: the device comprises a rotary table, a translation table, a lifting table and a pitching table; the lifting table is arranged on the rotary table, the translation table is arranged on the lifting table, the pitching table is arranged on the translation table, the lower three trapping optical modules are fixed on the pitching table, the rotary table drives the lower three trapping optical modules to rotate along the XY plane, the lifting table drives the lower three trapping optical modules to lift, the translation table drives the lower three trapping optical modules to translate, and the pitching table drives the lower three trapping optical modules to rotate along the YZ plane and the XZ plane; the motion of lower three prisoner's imprison optical module makes six prisoner's light and two anti helmholtz coils motion, and then drives atomic group motion in the magneto-optical trap to adjust the initial parameter of atom fountain motion, initial parameter includes: the initial position of the radical and the initial velocity direction of the radical.
Specifically, when the movable six-dimensional platform module drives the three trapping optical modules to move, the three upper trapping optical modules located above the movable six-dimensional platform module also move, so that the six trapping optical modules and the two anti-Helmholtz coils move, the directions of trapping light and a magnetic field acting on atomic groups are changed, and then the atomic groups in the magnetic light trap are driven to move along with the changed directions of the trapping light and the magnetic field.
In addition, it should be noted that the vacuum vessel is not in direct contact with the upper and lower three trapping optical modules, and the vacuum vessel does not move along with the movement of the upper and lower three trapping optical modules, but the size of the incident window of the trapping light on the vacuum vessel itself is a size that allows the trapping light to move in a small range.
In an optional embodiment, the initial parameters of the atomic fountain motion further include: the initial velocity of the radical;
and controlling the initial speed of the atomic group by controlling the frequency difference between the three beams of confining light generated by the three upper confining light beam expanders and the three beams of confining light generated by the three lower confining light beam expanders.
In an optional embodiment, when the turntable rotates, the turntable drives the lifting table, the translation table, the pitching table, the upper three-beam trapping optical module and the lower three-beam trapping optical module to rotate simultaneously, so that the initial velocity direction of the radical rotates along the XY plane.
In an optional embodiment, when the lifting platform is lifted in the Z-axis direction, the lifting platform drives the translation platform, the pitching platform, the upper three-beam confinement optical module and the lower three-beam confinement optical module to lift simultaneously, so that the initial position of the radical is translated along the Z-axis direction.
In an optional embodiment, when the translation stage translates in the X-axis direction or the Y-axis direction, the translation stage drives the pitch stage, the upper three-beam confinement optical module, and the lower three-beam confinement optical module to translate simultaneously, so that the initial position of the radical translates in the X-axis direction or the Y-axis direction.
In an optional embodiment, when the pitching platform rotates along the YZ plane or the XZ plane, the pitching platform drives the upper three trapping optical modules and the lower three trapping optical modules to rotate simultaneously, so that the initial speed direction of the radical rotates along the YZ plane or the XZ plane.
In an alternative embodiment, the elevating stage and the translation stage are adjusted to adjust the initial positions of the radicals in the X-axis, Y-axis and Z-axis directions;
and adjusting the included angles of the initial speed direction of the atomic group relative to the XY plane, the XZ plane and the YZ plane by adjusting the rotary table and the pitching table.
Optionally, the lower three trapping optical modules and the lower three trapping optical modules are fixed by screws.
Optionally, the lower three trapping optical modules are fixed on the pitching platform of the movable six-dimensional platform module through screws.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
the invention provides a device for adjusting the motion parameters of an atom fountain, which can realize the accurate control of three-dimensional translation (X, Y, Z) and three-dimensional rotation (omega x, omega y and omega z) in the initial velocity direction of atom groups at the initial position of the atom groups in the fountain, and control the initial velocity of the atom groups by controlling the frequency of confining light.
The atom fountain control device can realize real-time adjustment, has the characteristics of mobility, portability and the like, and better meets the control requirements and parameter requirements of the atom fountain in a cold atom experiment. The adjusting range and the adjusting precision of the invention are determined by the stroke and the precision of the six-dimensional platform and are not limited. The device provided by the invention can be widely applied to the field of quantum inertia sensing, is easy to adapt to a test container, and can realize fountain parameter adjustment by controlling the device without moving the vacuum container body in the working process.
Drawings
FIG. 1 is a schematic diagram of a module of an atomic fountain motion parameter adjusting device provided by the invention;
FIG. 2 is a schematic structural diagram of an atomic fountain motion parameter adjusting device provided by the present invention;
the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 100 is the upper three trapping optical modules; 200 is a lower three-beam imprisoning optical module; 300 is a movable six-dimensional platform module; 101 is a first beam trapping window; 102 is the upper reverse helmholtz coil fixing position; 103 is a first trapping light; 104 is a second beam of trapping light; 105 is a second beam trapping optical window; 106 is a third beam of trapping light; 107 is a third beam trapping optical window; 108 is a first stationary plane; 201 is a fourth beam trapping optical window; 202 is a fourth beam of trapping light; 203 is the back pump light window; 204 is a fifth beam trapping optical window; 205 is a fifth beam of trapping light; 206 is the lower anti-helmholtz coil fixing position; 207 is a sixth beam trapping optical window; 208 is a sixth trapping light; 209 is the pump back light; 210 is a second stationary plane; 211 is a third fixing surface; 301 is a YZ plane included angle (omega x) adjusting knob; 302 is a two-dimensional translation stage; 303 is a two-dimensional pitch stage; 304 is an X-direction adjustment knob; 305 is a turntable; 306 is a turntable (Ω z) adjustment knob; 307 is a lifting table; 308 is a Z-direction adjustment knob; 309 is an XZ plane angle (Ω y) adjusting knob; 310 is a Y-direction adjustment knob; and 311 is a fourth fixing surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention is a device for realizing the movement of the atomic fountain, and the movement parameters of the atomic groups can be changed by adjusting the device, so that the flight trajectory of the atomic groups can be accurately controlled, the subsequent interference and detection processes are facilitated, the use requirements of an atomic interferometer are met, and the measurement precision and the measurement capability are improved.
The invention relates to a movable adjusting adapter device, comprising: the system comprises an upper three-beam trapping optical module, a lower three-beam trapping optical module and a movable six-dimensional platform module;
the upper three-beam trapping optical module can be 20cm in length, 20cm in width and 15cm in height, and is used for fixing a beam expander, an upper reverse Helmholtz coil and a lower three-beam trapping optical module of the upper three-beam trapping optical module;
the lower three trapping optical modules can be 20cm in length, 20cm in width and 15cm in height, and are used for fixing a beam expander for fixing the lower three trapping cooling light beams, an anti-Helmholtz coil and a beam expander for returning pump light beams, and after being mutually fixed with the upper three trapping optical modules, the lower three trapping optical modules are integrally fixed on the movable six-dimensional platform module; the magneto-optical trap (MOT) is composed of trapping light generated by an upper and a lower three-beam trapping light beam expander and an upper and a lower reverse Helmholtz coils, wherein the intersection point of the upper and the lower three-beam trapping light is superposed with the axis of the upper and the lower reverse Helmholtz coils, and atoms can be trapped in the center of the magneto-optical trap. The atom fountain can be realized by simultaneously changing the frequency difference between the upper three beams of confinement light and the lower three beams of confinement light, and the directions of the atom fountain are the axial directions of the upper three beams of confinement light and the lower three beams of confinement light.
Specifically, the atom fountain can be realized by simultaneously changing the frequency difference between the upper three beams of confinement light and the lower three beams of confinement light, and the initial speed of the atom fountain can be controlled by controlling the frequency difference.
The movable six-dimensional platform module includes: the three-dimensional translation table, the rotary table and the two-dimensional pitching table are arranged on the base; the three-dimensional translation table can be 25cm in length and width and 10cm in height, so that three-dimensional integral translation of the upper three-beam confinement optical module and the lower three-beam confinement optical module can be realized, and further three-dimensional translation of the center of the atomic group, namely three-dimensional translation of the initial position of the atomic group, is realized. The diameter of the rotary table can be 35cm, the length and the width of the two-dimensional pitching table are 25cm, the three-dimensional integral rotation of the upper three-beam trapping optical module and the lower three-beam trapping optical module can be realized, and then the atom group initial speed direction is realized to rotate along three dimensions.
In an optional embodiment, the configuration of the trapping optical module in the trapping optical module is as follows:
wherein, go up three prison imprison optical module and include: the optical module comprises a first beam of confinement optical window, a second beam of confinement optical window, a third beam of confinement optical window, an upper reversed Helmholtz coil and a fixing surface mutually fixed with a lower three beams of confinement optical modules; during work, a first trapping light beam is injected from a first trapping optical window, a second trapping light beam is injected from a second trapping optical window, a third trapping light beam is injected from a third trapping optical window, and the whole module is fastened with the lower three trapping optical modules through screws.
Wherein, the lower three-beam imprisoning optical module includes: a fourth confining light window, a fifth confining light window, a sixth confining light window, a pumping light returning window and a lower reverse Helmholtz coil; during work, the fourth beam of confining light is injected from the fourth beam of confining light window, the fifth beam of confining light is injected from the fifth beam of confining light window, the sixth beam of confining light is injected from the sixth beam of confining light window, the backpump light is injected from the backpump light window, and the module is integrally fixed on the lower movable six-dimensional platform in a screw fastening mode after being fastened with the upper three beams of confining light modules.
In an optional embodiment, the movable six-dimensional platform module realizes specific adjustment of parameters of the atomic fountain as follows:
because the upper trapping optical module and the lower trapping optical module are fixed on the module, the translation movement of the whole upper trapping optical module and the whole lower trapping optical module in the three directions of X, Y and Z can be realized by adjusting the three-dimensional translation table, specifically, the position of the whole upper trapping optical module and the whole lower trapping optical module in the X direction is adjusted by controlling an X-direction adjusting knob, and then the movement of the initial position of the atomic group along the X-axis direction is realized; the Y-direction position of the whole upper and lower trapping optical modules is adjusted by controlling a Y-direction adjusting knob, so that the initial position of the atomic group moves along the Y-axis direction; the Z-direction position of the upper trapping optical module and the lower trapping optical module is adjusted by controlling a Z-direction adjusting knob, and therefore the atomic group initial position is moved along the Z-axis direction.
The rotary table omega Z knob is adjusted to realize that the upper and lower trapping optical modules integrally rotate along the Z direction, so that the initial speed direction of the atomic group is adjusted along the rotation of the XZ plane.
Adjusting knobs omega X and omega y of the two-dimensional pitching table can respectively realize the rotation of the whole upper and lower trapping optical modules along YZ and XZ plane directions, namely the whole upper and lower trapping optical modules can rotate along the X direction by adjusting the adjusting knobs omega X, so that the initial speed direction of the atomic group can rotate along the YZ plane; the upper and lower trapping optical modules are integrally rotated along the Y direction by adjusting the omega Y adjusting knob, and then the initial speed direction of the atomic group is rotated along the XZ plane.
In a specific embodiment, fig. 1 is a schematic diagram of a module for adjusting the motion parameters of an atomic fountain according to the present invention; in FIG. 1, 100 is the upper three trapping optical modules; 200 is a lower three-beam imprisoning optical module; 300 is a movable six-dimensional platform module;
specifically, in the upper three-beam trapping optical module 100: 101 is a first beam trapping window; 102 is the upper reverse helmholtz coil fixing position; 103 is a first trapping light; 104 is a second beam of trapping light; 105 is a second beam trapping optical window; 106 is a third beam of trapping light; 107 is a third beam trapping optical window; 108 is the first fixing surface.
Specifically, in the lower three trapping optical modules 200: 201 is a fourth beam trapping optical window; 202 is a fourth beam of trapping light; 203 is the back pump light window; 204 is a fifth beam trapping optical window; 205 is a fifth beam of trapping light; 206 is the lower anti-helmholtz coil fixing position; 207 is a sixth beam trapping optical window; 208 is a sixth trapping light; 209 is the pump back light; 210 is a second stationary plane; 211 is a third fixing surface.
Specifically, in the movable six-dimensional stage module 300: 301 is a YZ plane included angle (omega x) adjusting knob; 302 is a two-dimensional translation stage; 303 is a two-dimensional pitch stage; 304 is an X-direction adjustment knob; 305 is a turntable; 306 is a turntable (Ω z) adjustment knob; 307 is a lifting table; 308 is a Z-direction adjustment knob; 309 is an XZ plane angle (Ω y) adjusting knob; 310 is a Y-direction adjustment knob; and 311 is a fourth fixing surface.
In the embodiment of the present invention, the upper three trapping optical modules and the lower three trapping optical modules are firstly adapted to the upper atom fountain, and the first fixing surface 108 and the third fixing surface 211 of the two modules are fastened together by screws, and then are integrally fixed on the fourth fixing surface 311 of the movable six-dimensional platform module. Six windows on the device are correspondingly irradiated with six beams of circularly polarized laser to serve as six beams of confining light, and a pair of anti-Helmholtz coils are fixed at the coil positions. The six laser beams have equal power and frequencies that are red detuned and are opposite to each other, specifically, the first beam of confining light 103 is opposite to the sixth beam of confining light 208, the second beam of confining light 104 is opposite to the fifth beam of confining light 205, the third beam of confining light 106 is opposite to the fourth beam of confining light 202, and the opposite beams of laser beams have opposite circular polarization directions. The laser frequency is in red detuning, so that atoms are subjected to damping force, the power is equal, so that the atomic groups are stressed and balanced, the atoms are confined in the center of the magneto-optical trap, the anti-Helmholtz coil provides magnetic field gradient, and restoring force is generated to restrain the atomic groups.
After the cooling trapping of the radicals is completed, initial parameters of the radicals need to be set, and the invention will be described in detail with reference to the accompanying drawings:
the movable six-dimensional platform module 300 is used for adjusting the initial position and the speed direction of the atomic group and comprises a rotary table 305, a two-dimensional translation table 302, a lifting table 307 and a two-dimensional pitching table 303. Wherein the turntable part comprises a turntable (Ω z) adjustment knob 306; the two-dimensional translation stage part comprises an X-direction adjusting knob 304 and a Y-direction adjusting knob 310; the elevator platform portion includes a Z-direction adjustment knob 308; the two-dimensional table pitching section includes a radical velocity direction and XZ plane included angle (Ω y) adjusting knob 309, and a radical velocity direction and YZ plane included angle (Ω x) adjusting knob 301.
Specifically, the initial speed of the atom fountain is controlled by setting different frequency differences of the upper three beams and the lower three beams of confining light; the position of the upper and lower imprisoning optical modules in the X, Y, Z direction is set by adjusting an X-direction adjusting knob 304, a Y-direction adjusting knob 310 and a Z-direction adjusting knob 308 of the three-dimensional platform, so that the initial position of the atomic group is set; the angle of the whole upper and lower imprisoning optical modules along the three-dimensional rotation coordinate axis is set by adjusting an (omega z) adjusting knob 306 of the turntable, an included angle (omega y) between the radical speed direction and the XZ plane and an included angle (omega x) between the radical speed direction and the YZ plane and adjusting a knob 301, and then the initial speed direction of the radical is set.
FIG. 2 is a schematic structural diagram of an atomic fountain motion parameter adjusting device provided by the present invention; as shown in fig. 2, the movable six-dimensional stage module includes: turntable 305, translation stage 302, lift stage 307, and tilt stage 303. Here, the platen table and the vacuum vessel on the right side of the elevating table 307 in fig. 1 are not shown for the sake of simplicity of explanation. In fig. 2, the rotary knobs of the turntable, the translation stage, the lift stage and the tilt stage, and the vacuum vessel are not shown.
Specifically, the lifting table 307 is arranged on the rotary table 305, the translation table 302 is arranged on the lifting table 307, the pitching table 303 is arranged on the translation table 302, the lower three-beam confinement optical module 200 is fixed on the pitching table 303, the rotary table 305 drives the lower three-beam confinement optical module 200 to rotate, the lifting table 307 drives the lower three-beam confinement optical module 200 to ascend and descend, the translation table 302 drives the lower three-beam confinement optical module 200 to translate, and the pitching table 303 drives the lower three-beam confinement optical module 200 to rotate along the rotation of the YZ plane and the rotation of the XZ plane; the movement of the lower three trapping optical modules 200 drives the magneto-optical trap to move so as to adjust initial parameters of the movement of the atom fountain, wherein the initial parameters include: the initial position and the initial direction of movement of the atom.
Optionally, when the rotating table 305 rotates, it drives the lifting table 307, the translation table 302, the pitching table 303, the upper three-beam trapping optical module 100, and the lower three-beam trapping optical module 200 to rotate simultaneously, so as to realize that the initial velocity direction of the radical rotates along the XY plane.
Optionally, when the lifting platform 307 is lifted in the Z-axis direction, it drives the translation platform 302, the pitching platform 303, the upper three-beam confinement optical module 100, and the lower three-beam confinement optical module 200 to lift at the same time, so as to realize the translation of the initial position of the radical along the Z-axis direction.
Optionally, when the translation stage 302 translates in the X-axis direction or the Y-axis direction, it drives the pitching stage 303, the upper three-beam confinement optical module 100, and the lower three-beam confinement optical module 200 to translate simultaneously, so as to implement translation of the initial position of the radical along the X-axis direction or the Y-axis direction.
Optionally, when the pitching platform 303 rotates along the YZ plane or the XZ plane, it drives the upper three trapping optical modules 100 and the lower three trapping optical modules 200 to rotate simultaneously, so as to realize that the initial velocity direction of the radical rotates along the YZ plane or the XZ plane.
Optionally, the elevating stage 307 and the translation stage 302 are adjusted to adjust the initial positions of the radicals in the X-axis, Y-axis, and Z-axis directions;
the turntable 305 and the tilt table 303 are adjusted to adjust the angles of the radical initial velocity direction with respect to the XY plane, the XZ plane, and the YZ plane.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A device for adjusting motion parameters of an atom fountain is characterized by comprising: the device comprises an upper three-beam trapping optical module, a lower three-beam trapping optical module, a vacuum container and a movable six-dimensional platform module;
the upper three trapping optical modules are structurally a cover with a downward opening, three beam expander windows are arranged on the cover to fix the three upper trapping optical beam expanders, and a coil window is further arranged to fix an upper reverse Helmholtz coil;
the lower three trapping optical modules are structurally a cover with an upward opening, three beam expander windows are arranged on the cover to fix the three lower trapping optical beam expanders, and a coil window is also arranged to fix a lower reverse Helmholtz coil; the upper three trapping optical modules are fixedly positioned on the lower three trapping optical modules, and the opening directions of the two covers are symmetrical; three beam expander windows of the upper three trapping optical modules and three beam expander windows of the lower three trapping optical modules are respectively arranged in a pairwise symmetry manner, and coil windows of the upper three trapping optical modules and coil windows of the lower three trapping optical modules are arranged in a symmetry manner;
the vacuum container contains atomic groups which are arranged inside the upper three-beam trapping optical module and the lower three-beam trapping optical module; when three upper trapping light beam expanders and upper anti-Helmholtz coils are assembled on the upper three trapping light modules and three lower trapping light beam expanders and lower anti-Helmholtz coils are assembled on the lower three trapping light modules, six trapping light beams and magnetic fields provided by the two anti-Helmholtz coils are generated by the three upper trapping light beam expanders and the three lower trapping light beam expanders and act on atomic groups in a vacuum container, a magneto-optical trap is generated, the atomic groups are trapped in the vacuum container, and atoms move as a fountain after the atomic groups in the magneto-optical trap are polished upwards;
the movable six-dimensional platform module includes: the device comprises a rotary table, a translation table, a lifting table and a pitching table; the lifting table is arranged on the rotary table, the translation table is arranged on the lifting table, the pitching table is arranged on the translation table, the lower three trapping optical modules are fixed on the pitching table, the rotary table drives the lower three trapping optical modules to rotate along the XY plane, the lifting table drives the lower three trapping optical modules to lift, the translation table drives the lower three trapping optical modules to translate, and the pitching table drives the lower three trapping optical modules to rotate along the YZ plane and the XZ plane; the motion of lower three prisoner's imprison optical module makes six prisoner's light and two anti helmholtz coils motion, and then drives atomic group motion in the magneto-optical trap to adjust the initial parameter of atom fountain motion, initial parameter includes: the initial position of the radical and the initial velocity direction of the radical.
2. The apparatus for adjusting parameters of an atomic fountain motion of claim 1, wherein the initial parameters of the atomic fountain motion further include: the initial velocity of the radical;
and controlling the initial speed of the atomic group by controlling the frequency difference between the three beams of confining light generated by the three upper confining light beam expanders and the three beams of confining light generated by the three lower confining light beam expanders.
3. The device for adjusting the movement parameters of the atom fountain according to claim 1 or 2, wherein when the turntable rotates, the turntable drives the lifting table, the translation table, the pitching table, the upper three trapping optical modules and the lower three trapping optical modules to rotate simultaneously, so that the initial velocity direction of the atomic group rotates along the XY plane.
4. The device for adjusting the motion parameters of an atom fountain according to claim 3, wherein when the lifting table is lifted in the Z-axis direction, the lifting table drives the translation table, the pitching table, the upper three trapping optical modules and the lower three trapping optical modules to be lifted simultaneously, so that the initial position of the atomic group is translated in the Z-axis direction.
5. The device for adjusting the movement parameters of the atom fountain according to claim 4, wherein when the translation stage translates in the X-axis or Y-axis direction, the translation stage drives the pitching stage, the upper three trapping optical modules and the lower three trapping optical modules to translate simultaneously, so as to translate the initial position of the atomic group along the X-axis or Y-axis direction.
6. The device for adjusting atom fountain motion parameters of claim 5, wherein the pitching table drives the upper and lower three trapping optical modules to rotate simultaneously when rotating along the YZ plane or the XZ plane, so as to realize the rotation of the initial velocity direction of the atomic group along the YZ plane or the XZ plane.
7. The apparatus for adjusting the parameters of an atomic fountain according to claim 6, wherein the elevating platform and the translation platform are adjusted to adjust the initial positions of the radicals in the X-axis, Y-axis and Z-axis directions;
and adjusting the included angles of the initial speed direction of the atomic group relative to the XY plane, the XZ plane and the YZ plane by adjusting the rotary table and the pitching table.
8. The apparatus for adjusting atom fountain motion parameters of any one of claims 4-6, wherein the lower three trapping optical modules and the lower three trapping optical modules are fixed by screws.
9. The apparatus for adjusting atomic fountain motion parameters of any one of claims 4-6, wherein the lower three trapping optical modules are screwed onto the pitching table of the movable six-dimensional platform module.
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| CN115588525B (en) * | 2022-10-26 | 2023-08-01 | 天府兴隆湖实验室 | Atomic movement device |
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| Publication number | Publication date |
|---|---|
| CN112556676B (en) | 2022-09-13 |
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