Experimental device for trapping cold molecule ions

Abstract

The invention relates to the technical field of optical instruments, and discloses an experimental device for trapping cold molecule ions, which comprises a rack arranged on the ground, and further comprises a main cavity fixedly mounted on the surface of one side, far away from the ground, of the rack, and an installation and storage area arranged on the inner side of the main cavity; the electric field trapping assembly is arranged on the main cavity and is used for forming a three-dimensional trapping potential well with charged ions; the vacuumizing assembly is arranged on the rack, is connected with the main cavity and is used for forming a vacuum environment in the mounting and storing area of the main cavity; the laser cooling assembly is arranged on the main cavity and communicates with the mounting storage area in the main cavity; and the optical measurement assembly is arranged on the main cavity and is used for measuring the state of ions in the main cavity installation and storage area. The experimental device for trapping cold molecule ions aims at solving the problems that in the prior art, the occupied area is large, the structure is not compact, and the building cost is high.

Description

Technical Field

[0001] The invention relates to the technical field of optical instruments, in particular to an experimental device for trapping cold molecular ions. Background Art

[0002] In cutting-edge research in physics and chemistry, cold molecular ions have attracted much attention due to their unique physical and chemical properties. In order to explore these properties in depth, an experimental device that can stably trap, cool and observe cold molecular ions is needed. Existing experimental devices for trapping cold molecular ions usually rely on complex electric fields, magnetic fields and laser technology to achieve the trapping, cooling and precise measurement of ions. The existence of such an experimental device is crucial because it provides a stable and controllable experimental environment in which ions can be precisely manipulated to study the basic laws of their interaction with light, electric fields, magnetic fields, etc. In addition, cold molecular ions also have great application potential in quantum computing, quantum communication, precision measurement and other fields.

[0003] However, the uncompactness of the structural design of the existing trapped cold molecular ion experimental device does bring many challenges. Its huge size not only limits the space utilization in the laboratory, making flexible deployment difficult, but also significantly increases the complexity and cost of installation and maintenance. Due to the large size of the device, the connecting lines and pipes between the components also increase accordingly, which not only increases the difficulty of connection and debugging, but also may cause signal attenuation and energy loss, thereby affecting the stability and accuracy of the experiment. What is more serious is that due to the large size of the device, it is also more sensitive to environmental changes. For example, external temperature changes may cause thermal expansion and contraction inside the device, thereby affecting the relative position and accuracy of the components. At the same time, the optical measurement environment is also susceptible to external interference, which may lead to inaccurate optical measurements and introduce errors. These defects not only limit the performance of the experimental device, but also increase the uncertainty and risk of the experimental results. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of large floor space, non-compact structure and high construction cost in the prior art, and to propose a trapped cold molecular ion experimental device.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A trapped cold molecular ion experimental device comprises a rack placed on the ground, and further comprises: The main cavity is fixedly mounted on a side surface of the frame away from the ground, wherein an installation and storage area is provided inside the main cavity; An electric field trapping component is disposed on the main cavity and is used to form a three-dimensional trapping potential well for charged ions; A vacuum pumping assembly is arranged on the frame and connected to the main cavity, and is used to form a vacuum environment in the installation and storage area of ​​the main cavity; A laser cooling assembly is disposed on the main cavity and is interconnected with the installation and storage area in the main cavity; The optical measurement component is arranged on the main cavity and is used to measure the state of ions in the installation and storage area of ​​the main cavity.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, a plurality of light-passing flanges are fixedly installed on the outer side of the main cavity, one end of which passes through and extends to the inner side of the main cavity. The plurality of light-passing flanges are symmetrically distributed according to the center of the main cavity, wherein a cavity mirror is also fixedly installed on the inner side of the light-passing flange, and the cavity mirror is made of fused quartz as a whole. A top window is embedded in the end of the main cavity away from the frame, and the top window is made of fused quartz.

[0008] Furthermore, the electric field trapping component includes: An ion trap is arranged inside the main cavity and located in the installation and storage area; A high-voltage electrical via is disposed through the inner side of the main cavity and one end of which is located in the installation and storage area, wherein the number of the high-voltage electrical vias is not less than two and they are symmetrically distributed according to the center of the main cavity; and 15-pin electric contact, set on the outer wall of the main cavity Furthermore, the vacuum pumping assembly includes: Mechanical pump, fixedly installed on the frame; A molecular pump is fixedly mounted on the frame, and its suction end penetrates the main cavity and extends to the installation and storage area, wherein the mechanical pump and the molecular pump are connected by a corrugated hose; A titanium pump is fixedly mounted on the frame, wherein the titanium pump is also provided with a titanium wire having one end penetrating the main cavity and extending into the installation and storage area; and The vacuum gauge is fixedly installed on the outside of the main cavity, and its detection end penetrates and extends into the installation and storage area.

[0009] Furthermore, the laser cooling component is a laser, and the laser beam generated by the laser can pass through the cavity mirror and irradiate into the installation and storage area.

[0010] Furthermore, the optical measurement component includes: An optical fiber rack is fixedly mounted on the rack, one end of which passes through the main cavity and extends into the installation and storage area; The adjusting bracket is arranged on the frame, and the entire bracket is arranged perpendicular to the frame; A camera is mounted on the adjustment bracket, wherein the camera end is aligned with the top window to capture the installation and storage area; and The breadboard is fixedly mounted on the rack and has a horizontal building surface.

[0011] Furthermore, the optical fiber rack includes: A mounting base, fixedly mounted on the frame, having a horizontal mounting surface; The three-dimensional translation stage is fixedly mounted on the mounting surface of the mounting seat; A connecting rod, one end of which is fixedly mounted on the displacement end of the three-dimensional translation stage, and the other end of which passes through the main cavity and extends into the installation and storage area; and The peeled optical fiber part is fixedly mounted on the end of one side of the connecting rod away from the three-dimensional translation stage.

[0012] Furthermore, the adjusting bracket includes: The bracket base is fixedly mounted on a side surface of the main cavity away from the frame; The XY linear translation stage is fixedly mounted on the side surface of the bracket base away from the frame; The connecting plate is fixedly mounted on the moving end of the XY linear translation stage; The Z-axis lifting platform is fixedly installed on the other side surface of the connecting plate; The lifting guide column is fixedly installed on the other side surface of the Z-axis lifting platform; A mounting frame connected to the outer side of the lifting guide column by bolts; and The connecting fixture is fixedly mounted on the mounting frame and is connected to the camera.

[0013] Furthermore, a lens barrel is fixedly connected to the shooting end of the camera, and an objective lens is fixedly installed on the top window, wherein the centers of the lens barrel and the objective lens are located on the same vertical line, and a beam splitter cube is provided at the end of the objective lens away from the top window, wherein the beam splitter cube is located between the lens barrel and the objective lens, and a beam splitter arranged at forty-five degrees is provided inside the beam splitter cube.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The present invention significantly optimizes the overall structural design of the device and reduces the floor space by adopting a compact frame and a main cavity fixedly installed on the side of the frame away from the ground. Secondly, the arrangement of the electric field trapping component can stably trap cold molecular ions by forming a three-dimensional trapped potential well of charged ions, providing a stable and controllable experimental environment. This design ensures the stability and controllability of ions during the experiment, thereby improving the accuracy and reliability of the experiment. Furthermore, the interconnection between the vacuum pumping component and the main cavity can ensure that the installation and storage area in the main cavity forms a vacuum environment, which is very important for reducing the contact between ions and the background. It is crucial to prevent the collision of scene gases, extend the trapping time of ions and improve the accuracy of the experiment. The efficient operation of the vacuum assembly can effectively reduce the interference of the external environment on the experimental results and improve the accuracy and reliability of the experiment. In addition, the setting of the laser cooling assembly is interconnected with the installation and storage area in the main cavity through laser technology, which can realize the cooling of ions and make the ions reach a low temperature state close to absolute zero. Finally, the setting of the optical measurement assembly can accurately measure the fluorescence intensity of ions in the main cavity, thereby inferring the number and state of ions. This high-precision measurement technology improves the accuracy and reliability of experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall connection structure of the present invention; Figure 2 It is a schematic diagram of the connection structure between the frame and the main cavity of the present invention; Figure 3 It is a schematic diagram of the connection structure between the main cavity and the electric field trapping component of the present invention; Figure 4 It is a schematic diagram of the connection structure between the main cavity and the vacuum pumping component of the present invention; Figure 5 It is a structural schematic diagram of the optical fiber rack of the present invention; Figure 6 This is a schematic diagram of the connection structure between the adjusting bracket and the camera of the present invention.

[0016] In the figure: 1. rack; 2. main cavity; 3. electric field trapping assembly; 31. ion trap; 32. high voltage circuit; 33. 15-pin circuit; 4. vacuum assembly; 41. mechanical pump; 42. molecular pump; 43. titanium pump; 44. vacuum gauge; 5. laser cooling assembly; 6. optical measurement assembly; 61. fiber rack; 611. mounting seat; 612. three-dimensional translation stage; 613. connecting rod; 614. peeled fiber section; 62. adjustment bracket; 621. bracket base; 622. XY linear translation stage; 623. connecting plate; 624. Z-axis lifting platform; 625. lifting guide column; 626. mounting bracket; 627. connecting fixture; 63. camera; 64. breadboard; 7. light-transmitting flange; 8. cavity mirror; 9. top window; 10. lens barrel; 11. objective lens; 12. beam splitter cube. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Combination Figure 1-Figure 6 As shown, a trapped cold molecular ion experimental device of the present invention includes a rack 1 placed on the ground, and also includes: The main cavity 2 is fixedly mounted on a side surface of the frame 1 away from the ground, wherein an installation and storage area is provided inside the main cavity 2; The electric field trapping component 3 is arranged on the main cavity 2 and is used to form a three-dimensional trapping potential well for charged ions; A vacuum pumping assembly 4 is disposed on the frame 1 and connected to the main chamber 2, and is used to form a vacuum environment in the installation and storage area of ​​the main chamber 2; The laser cooling assembly 5 is disposed on the main cavity 2 and is in communication with the installation and storage area in the main cavity 2; The optical measurement component 6 is disposed on the main cavity 2 and is used to measure the state of ions in the installation and storage area of ​​the main cavity 2 .

[0019] The experimental device is firstly based on a frame 1, which is firmly placed on the ground to provide support for the entire device. On the side surface of the frame 1 away from the ground, a main cavity 2 is fixedly installed, and a special installation and storage area is provided inside the main cavity 2 for accommodating and trapping cold molecular ions. An electric field trapping component 3 is provided on the main cavity 2. The component forms a three-dimensional trapped potential well for charged ions inside the main cavity 2 through a precisely controlled electric field. This potential well can stably trap cold molecular ions so that they will not escape during the experiment, thereby ensuring the continuity and accuracy of the experiment. In order to ensure the purity of the experimental environment and reduce external interference, a vacuum component 4 is arranged on the frame 1 and interconnected with the main cavity 2. The vacuum component 4 evacuates the installation and storage area of ​​the main cavity 2 through efficient work. A vacuum environment greatly reduces the probability of collision between ions and background gas, prolongs the ion trapping time, and improves the accuracy of the experiment. In terms of laser cooling, the laser cooling component 5 is cleverly arranged on the main cavity 2 and is interconnected with the installation and storage area in the main cavity 2. The laser cooling component 5 interacts with the cold molecular ions trapped in the main cavity 2 by emitting lasers of a specific frequency, thereby achieving ion cooling. The cooled ions are more stable, which is conducive to more in-depth research. Finally, in order to monitor and infer the number and state of ions in real time, the optical measurement component 6 is arranged on the main cavity 2. By measuring the fluorescence intensity of ions in the installation and storage area of ​​the main cavity 2, the component can indirectly infer the number and state of ions, providing valuable experimental data.

[0020] In a preferred embodiment, the present invention can be further configured as follows: Figure 3 , Figure 4As shown; a plurality of light-through flanges 7 with one end penetrating through and extending to the inner side of the main cavity 2 are fixedly installed on the outer side of the main cavity 2, and the plurality of light-through flanges 7 are symmetrically distributed according to the center of the main cavity 2, wherein a cavity mirror 8 is also fixedly installed on the inner side of the light-through flange 7, and the cavity mirror 8 is made of fused quartz as a whole, and a top window 9 is embedded in the end of the main cavity 2 away from the frame 1, and the top window 9 is made of fused quartz, and a plurality of light-through flanges 7 are fixedly installed on the outer side of the main cavity 2, and one end of these light-through flanges 7 penetrates and extends to the inner side of the main cavity 2, and these light-through flanges 7 are symmetrically distributed according to the center of the main cavity 2. Such a design not only ensures the uniform distribution of light, but also helps to improve the accuracy and efficiency of optical measurement. On the inner side of the light-through flange 7, The cavity mirrors 8 are also fixedly installed. These cavity mirrors 8 are made of fused quartz as a whole. This material has optical properties and thermal stability, which can effectively reduce the loss and distortion of light during propagation and ensure the quality and stability of light. The setting of the cavity mirrors 8 not only helps the later reflection and focusing of light, but also provides a more accurate and stable optical path for the optical measurement component 6. In addition, a top window 9 is embedded in the end of the main cavity 2 away from the frame 1. This top window 9 is also made of fused quartz. It provides a clear and transparent observation window, so that the situation inside the main cavity 2 can be intuitively observed. At the same time, the top window 9 made of fused quartz also has good optical properties and thermal stability, which can ensure the accuracy and long-term stability of observation.

[0021] In a preferred embodiment, the present invention can be further configured as follows: Figure 2 , Figure 3 As shown; the electric field trapping component 3 includes: The ion trap 31 is disposed inside the main cavity 2 and is located in the installation and storage area; and A high-voltage electrical via 32 is disposed through the inner side of the main cavity 2 and one end of which is located in the installation and storage area, wherein the number of the high-voltage electrical vias 32 is not less than two and they are symmetrically distributed according to the center of the main cavity 2; and 15 needle electric vias 33 are set on the outer wall of the main cavity 2, and the ion trap 31 is set on the inner side of the main cavity 2 and is located in the installation and storage area. This area is the main place where cold molecular ions are trapped and studied. The ion trap 31 can generate a strong trapped potential through the precisely designed electric field structure, which can firmly bind the charged ions inside the potential trap to prevent them from escaping. At the same time, the high-voltage electric vias 32 also play a vital role. These high-voltage electric vias 32 are set on the inner side of the main cavity 2, and one of them The ends are located in the installation and storage area. There are no less than two of them and they are symmetrically distributed according to the center of the main cavity 2. This design is for axial extraction of trapped ions in subsequent experiments. The 15-pin feedthrough applies DC and AC electric fields to work together with the ion trap 31 to form a powerful three-dimensional trapped potential well. This potential well can accurately trap charged ions and manipulate and study them. The 15-pin feedthrough has 15 interfaces, and this feedthrough can connect 15 independent wires.

[0022] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 , Figure 4 As shown; the vacuum assembly 4 includes: A mechanical pump 41 is fixedly mounted on the frame 1; The molecular pump 42 is fixedly mounted on the frame 1, and its air extraction end penetrates the main cavity 2 and extends to the installation and storage area, wherein the mechanical pump 41 and the molecular pump 42 are connected by a corrugated hose; A titanium pump 43 is fixedly mounted on the frame 1, wherein the titanium pump 43 is also provided with a titanium wire having one end penetrating through the main cavity 2 and extending to the installation and storage area; and The vacuum gauge 44 is fixedly mounted on the outside of the main cavity 2, and its detection end penetrates and extends into the installation and storage area. The vacuum pumping component 4 ensures that the installation and storage area in the main cavity 2 reaches the required vacuum degree to reduce the interference of background gas on cold molecular ions and ensure the accuracy and stability of the experiment. This function is achieved by the cooperation of the mechanical pump 41, molecular pump 42, titanium pump 43 and vacuum gauge 44. First, the mechanical pump 41 is fixedly mounted on the frame 1. As the initial stage of vacuum pumping, it can initially extract the gas in the main cavity 2 and reduce the air pressure in the main cavity 2. The mechanical pump 41 works stably and reliably, providing a basis for subsequent high vacuum extraction. Then, the molecular pump 42 is also fixedly mounted on the frame 1, and its exhaust end penetrates the main cavity 2 and extends into the installation and storage area. The molecular pump 42 accelerates and discharges gas molecules using high-speed rotating turbine blades, which can It can further reduce the air pressure in the main cavity 2 to achieve a higher vacuum degree. At the same time, the mechanical pump 41 and the molecular pump 42 are connected by a corrugated hose to ensure the continuity and stability of gas extraction. In addition, the titanium pump 43 is also fixedly installed on the frame 1. It uses the characteristics of titanium wire to adsorb gas at high temperature to further reduce the air pressure in the main cavity 2 to achieve a high vacuum or even ultra-high vacuum state. One end of the titanium wire on the titanium pump 43 passes through the main cavity 2 and extends to the installation and storage area, ensuring the maximization of the adsorption effect. The titanium wire is evaporated to adsorb the remaining water and hydrogen in the cavity. Finally, the vacuum gauge 44 is fixedly installed on the outside of the main cavity 2, and its detection end passes through and extends to the installation and storage area, which is used to monitor the vacuum degree in the main cavity 2 in real time. The precise measurement of the vacuum gauge 44 provides important data support for the experimenters and ensures the stability and controllability of the experimental environment.

[0023] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 , Figure 2As shown; the laser cooling component 5 is a laser. The laser beam generated by the laser can pass through the cavity mirror 8 and irradiate into the installation and storage area. The laser cooling component 5 is specifically implemented as a laser in this experimental device. This design aims to use the interaction between the laser and the cold molecular ions to achieve ion cooling. The laser, as the core component of the laser cooling component 5, can generate a stable and high-intensity laser beam. During the experiment, the laser beam generated by the laser will pass through the cavity mirror 8. The cavity mirror 8 is a key component on the inner side of the light-transmitting flange 7. The whole is made of fused quartz. This material has excellent optical properties and thermal stability, and can effectively reduce the loss and distortion of light during propagation. Therefore, the laser beam can be smoothly and The laser beam can efficiently pass through the cavity mirror 8 without being significantly disturbed or attenuated. After passing through the cavity mirror 8, it will accurately irradiate the installation and storage area in the main cavity 2. In this area, the cold molecular ions are bound by the three-dimensional trapped potential well formed by the electric field trapping component 3. When the laser beam interacts with these ions, a Doppler cooling effect will occur, causing the kinetic energy of the ions to gradually decrease, thereby achieving ion cooling. The cooled ions have a lower temperature and a more stable state of motion, which helps to more accurately observe and control the behavior of the ions during the experiment. At the same time, due to the stability and controllability of the laser beam, the experimenter can adjust the intensity and frequency of the laser as needed to achieve precise control of the ion cooling effect.

[0024] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown; the optical measurement component 6 includes: The optical fiber rack 61 is fixedly mounted on the rack 1, one end of which passes through the main cavity 2 and extends into the installation and storage area; The adjusting bracket 62 is arranged on the frame 1, and the entire bracket 62 is arranged perpendicular to the frame 1; A camera 63 is disposed on the adjustment bracket 62, wherein the camera 63 has its shooting end aligned with the top window 9 to shoot the installation and storage area; and The breadboard 64 is fixedly mounted on the rack 1 and has a horizontal construction surface. The optical fiber rack 61 is fixedly mounted on the rack 1, and one end of the optical fiber rack 61 passes through the main cavity 2 and extends to the installation and storage area. This design allows the optical fiber to be directly connected to the core area of ​​the experiment to guide the laser or other optical signals to excite or detect cold molecular ions. The stability and accuracy of the optical fiber rack 61 are crucial to ensure the accuracy of optical measurements. The adjustment bracket 62 is arranged on the rack 1 and is arranged perpendicular to the rack 1. This design allows the adjustment bracket 62 to flexibly adjust the height and angle so that the camera 63 can be accurately aligned with the top. Window 9, the top window 9 is made of fused quartz, providing a clear and transparent observation window, so that the camera 63 can clearly capture the cold molecular ions in the installation and storage area. The camera 63 is set on the adjustment bracket 62, and its shooting end is aimed at the top window 9. During the experiment, the camera 63 will capture and record the fluorescent image or video of the cold molecular ions in the installation and storage area. These images or video data provide important information about the number, state and dynamic behavior of the ions. The breadboard 64 is fixedly installed on the rack 1 and has a horizontal construction surface for building other optical elements or circuits to expand the function and flexibility of the experimental device.

[0025] In a preferred embodiment, the present invention can be further configured as follows: Figure 4 , Figure 5 As shown; the optical fiber rack 61 comprises: The mounting base 611 is fixedly mounted on the frame 1 and has a horizontal mounting surface; The three-dimensional translation stage 612 is fixedly mounted on the mounting surface of the mounting seat 611; A connecting rod 613, one end of which is fixedly mounted on the displacement end of the three-dimensional translation stage 612, and the other end of which passes through the main cavity 2 and extends to the installation and storage area; and The peeled optical fiber part 614 is fixedly mounted on the end of the connecting rod 613 on one side away from the three-dimensional translation stage 612. The optical fiber rack 61 is a key part in the optical measurement component 6. Its main function is to accurately introduce the optical fiber into the installation and storage area of ​​the main cavity 2 so as to accurately know the position of the cooling light. The design of the optical fiber rack 61 fully considers stability and precision to ensure the accuracy of optical measurement. First, the mounting seat 611 is fixedly mounted on the frame 1 as the basic component of the optical fiber rack 61. The mounting seat 611 has a horizontal mounting surface. This design ensures the stable installation of subsequent components. Then, the three-dimensional translation stage 612 is fixedly mounted on the mounting surface of the mounting seat 611. The three-dimensional translation stage 612 has the ability to translate in three directions, that is, it can be accurately adjusted in the horizontal and vertical directions. This design enables the optical fiber rack 61 to flexibly adjust the position of the optical fiber to ensure that the optical fiber can accurately extend into the middle area of ​​the ion trap and guide the cooling light to hit this position smoothly for the subsequent laser cooling. The connecting rod 613 is used as the transmission of the optical fiber rack 61. The movable component has one end fixedly mounted on the displacement end of the three-dimensional translation stage 612. The design of the connecting rod 613 not only ensures the stability of the optical fiber, but also ensures that the optical fiber can smoothly pass through the main cavity 2 and extend to the installation and storage area. At the other end of the connecting rod 613, the peeled optical fiber part 614 is fixedly mounted. The peeled optical fiber part 614 is the end part of the optical fiber. It is specially treated to remove the protective layer of the optical fiber, exposing the optical fiber core, and guiding the position of the cooling light so that the cooling light and the cold molecular ions can interact optically. During the experiment, by adjusting the three-dimensional translation stage 612, the position of the peeled optical fiber part 614 can be precisely controlled to align it with the cold molecular ions in the installation and storage area. Then, the laser or other optical signals are guided through the optical fiber to excite or detect the cold molecular ions. Due to the high stability and precision of the optical fiber rack 61, the accuracy and reliability of the optical measurement can be ensured. It should also be noted that the three-dimensional translation stage 612 is a three-dimensional translation device on a machine tool in the prior art. The specific structure and working principle can be obtained through retrieval and there is no need to elaborate here.

[0026] In a preferred embodiment, the present invention can be further configured as follows: Figure 5 , Figure 6 As shown; the adjustment bracket 62 includes: The support base 621 is fixedly mounted on a side surface of the main cavity 2 away from the frame 1; An XY linear translation stage 622 is fixedly mounted on a side surface of the support base 621 away from the frame 1; The connecting plate 623 is fixedly mounted on the moving end of the XY linear translation stage 622; The Z-axis lifting platform 624 is fixedly mounted on the other side surface of the connecting plate 623; The lifting guide column 625 is fixedly mounted on the other side surface of the Z-axis lifting platform 624; A mounting frame 626 connected to the outer side of the lifting guide column 625 by bolts; and The connecting fixture 627 is fixedly mounted on the mounting frame 626 and is interconnected with the camera 63. The adjusting bracket 62 is an important part of the optical measurement assembly 6. Its main function is to realize the accurate installation and position adjustment of the camera 63 on the top of the main cavity 2. By adjusting the various components of the bracket 62, the shooting angle and position of the camera 63 can be flexibly adjusted to ensure that it can accurately capture the image of the cold molecular ions in the installation and storage area. First, the bracket base 621 is fixedly mounted on the side surface of the main cavity 2 away from the frame 1, providing a stable support foundation for the entire adjusting bracket 62. The XY linear translation stage 622 is fixedly mounted on the side surface of the support base 621 away from the frame 1, which allows the camera 63 to perform precise two-dimensional translation adjustment in the horizontal plane. The connecting plate 623 is fixedly mounted on the moving end of the XY linear translation stage 622. It serves as a bridge connecting the XY linear translation stage 622 and the Z-axis lifting platform 624, ensuring that the Z-axis lifting platform 624 can move with the movement of the XY linear translation stage 622. The Z-axis lifting platform 624 is fixedly mounted on the other side surface of the connecting plate 623, which allows the camera 63 to perform precise lifting and lowering adjustment in the vertical direction. The guide column 625 is fixedly mounted on the other side surface of the Z-axis lifting platform 624. It serves as a supporting structure for the mounting frame 626, ensuring the stability and verticality of the mounting frame 626. The mounting frame 626 is connected to the outer side of the lifting guide column 625 by bolts, and it provides a platform for roughly adjusting the vertical position of the camera 63. Finally, the connecting fixture 627 is fixedly mounted on the mounting frame 626 and is interconnected with the camera 63. The design of the connecting fixture 627 ensures that the camera 63 can be firmly mounted on the adjustment bracket 62, and the position can be accurately adjusted by adjusting the various components of the bracket 62. During the experiment, the operator can flexibly adjust the shooting angle and position of the camera 63 by adjusting the XY linear translation stage 622 to ensure that its shooting range can accurately cover the cold molecular ions in the installation and storage area. At the same time, the position of the camera 63 can be roughly adjusted through the mounting frame 626, and then fine-tuned with the Z-axis lifting platform 624 to further accurately position the vertical position of the camera 63 to obtain a clearer image. The XY linear translation stage 622 and the Z-axis lifting stage 624 are the same as the XY linear translation device and the Z-axis lifting device on the high-precision machine tools in the prior art, and there is no need to elaborate on them here.

[0027] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 , Figure 6As shown; a lens barrel 10 is fixedly connected to the shooting end of the camera 63, and an objective lens 11 is fixedly installed on the top window 9, wherein the centers of the lens barrel 10 and the objective lens 11 are located on the same vertical line, and a beam splitting cube 12 is arranged at one end of the objective lens 11 away from the top window 9, wherein the beam splitting cube 12 is located between the lens barrel 10 and the objective lens 11, and a beam splitter arranged at a forty-five degree angle is arranged in the beam splitting cube 12. In the trapped cold molecular ion experimental device, the camera 63, as the core component of the optical measurement component 6, undertakes the important task of capturing and recording the cold molecular ion image. In order to improve the shooting effect and accuracy, the lens barrel 10 is fixedly connected to the shooting end of the camera 63. The lens barrel 10, as a protective and guiding structure, can ensure that the lens of the camera 63 is kept accurately aligned with the subsequent optical components. At the same time, the lens barrel 10 can also reduce the interference of external light on shooting and improve the shooting quality. On the top window 9, an objective lens 11 is fixedly installed. The objective lens 11, as a magnifying and focusing lens, can install the storage The cold molecular ions in the release area are magnified and focused onto the lens of the camera 63. In order to ensure the accuracy of shooting, the centers of the lens barrel 10 and the objective lens 11 are located on the same vertical line, so that the path of light from the objective lens 11 to the camera 63 can be ensured to be the shortest and most accurate. At the end of the objective lens 11 away from the top window 9, a beam splitter cube 12 is provided. The beam splitter cube 12 is located between the lens barrel 10 and the objective lens 11, and a beam splitter arranged at a forty-five degree angle is provided inside the beam splitter. The beam splitter can split the light from the objective lens 11 into two beams, one of which is directly directed to the camera 63 for capturing images of the cold molecular ions; the other is used to measure the fluorescence intensity of the ions by the fluorescence counter to infer the number and state of the ions. Due to the special design of the beam splitter cube 12 and the beam splitter, they can achieve effective distribution and utilization of light without interfering with the shooting of the camera 63. At the same time, this design also enables the experimental device to perform multiple optical measurement and analysis tasks at the same time, thereby improving the efficiency and accuracy of the experiment.

[0028] The specific working principle of the experimental device for trapping cold molecular ions of the present invention is as follows: First, place the experimental device on a stable ground to ensure that the rack 1 is firmly installed. Then, in the fixed installation area of ​​the main cavity 2, prepare the molecular ion samples required for the experiment through the installation and storage area inside it. At this time, the electric field trapping component 3 starts to work, and the ion trap 31 forms a three-dimensional trapped potential well for charged ions in the installation and storage area of ​​the main cavity 2. The ion trap 31 can generate a strong trapped potential through the precisely designed electric field structure, which can firmly bind the charged ions inside the potential well to prevent them from escaping. The high-voltage electric discharge 32 axially leads the trapped ions in subsequent experiments. The 15-pin electric discharge applies a DC electric field and an AC electric field to work together with the ion trap 31 to form a strong three-dimensional trapped potential well. This potential well can accurately trap charged ions and manipulate and study them. To ensure the purity of the experimental environment, the vacuum assembly 4 starts to operate. The mechanical pump 41 and the molecular pump 42 are connected by a corrugated hose. The exhaust end of the molecular pump 42 goes deep into the installation and storage area of ​​the main cavity 2 to extract the internal gas. The titanium wire on the titanium pump 43 also goes deep into the area to further extract the residual gas. The vacuum gauge 44 continuously monitors the vacuum degree in the main cavity 2 to ensure that it meets the standards required for the experiment. Subsequently, the laser cooling assembly 5 is started, and the laser beam generated by the laser passes through the cavity mirrors 8 inside the light-transmitting flange 7. These cavity mirrors 8 are made of fused quartz and have high light transmittance, ensuring that the laser beam can accurately irradiate the molecular ions in the installation and storage area to achieve laser cooling; During the cooling process, the optical measurement assembly 6 starts to work. The peeled optical fiber part 614 on the optical fiber rack 61 guides the optical signal to the installation and storage area in the main cavity 2 through the precise adjustment of the connecting rod 613 and the three-dimensional translation stage 612. At the same time, the camera 63 is precisely aligned with the top window 9 by adjusting the XY linear translation stage 622, the Z-axis lifting platform 624 and the lifting guide column 625 on the adjustment bracket 62. The top window 9 is also made of fused quartz to ensure high light transmittance. The lens barrel 10 connected to the shooting end of the camera 63 is aligned with the objective lens 11 on the top window 9. The beam splitter cube 12 and the beam splitter inside it are arranged in the middle to split and guide the light path, so as to capture the ion fluorescence image in the installation and storage area. Through these images, the fluorescence intensity of the ions can be measured, and the number and state of the ions can be inferred, providing key information for the analysis and processing of experimental data. Throughout the entire experimental process, the various components work together to ensure the accuracy and reliability of the trapped cold molecular ion experiment.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A trapped cold molecular ion experimental device, comprising a frame (1) placed on the ground, characterized in that: Also includes: The main cavity (2) is fixedly mounted on a surface of a side of the frame (1) away from the ground, wherein an installation and storage area is provided inside the main cavity (2); An electric field trapping component (3) is arranged on the main cavity (2) and is used to form a three-dimensional trapping potential well for charged ions; A vacuum pumping assembly (4) is arranged on the frame (1) and is interconnected with the main cavity (2), and is used to form a vacuum environment in the installation and storage area of ​​the main cavity (2); A laser cooling component (5) is arranged on the main cavity (2) and is in communication with a mounting and storage area in the main cavity (2); The optical measurement component (6) is arranged on the main cavity (2) and is used to measure the state of ions in the installation and storage area of ​​the main cavity (2).

2. The experimental device for trapping cold molecular ions according to claim 1, characterized in that: A plurality of light-transmitting flanges (7) are fixedly mounted on the outer side of the main cavity (2), one end of which penetrates through and extends to the inner side of the main cavity (2). The plurality of light-transmitting flanges (7) are symmetrically distributed according to the center of the main cavity (2). A cavity mirror (8) is also fixedly mounted on the inner side of the light-transmitting flange (7). The cavity mirror (8) is made of fused quartz as a whole. A top window (9) is embedded at one end of the main cavity (2) away from the frame (1). The top window (9) is made of fused quartz.

3. The trapped cold molecular ion experimental device according to claim 1, characterized in that: The electric field trapping component (3) comprises: An ion trap (31) is arranged inside the main cavity (2) and is located in the installation and storage area; A high-voltage electrical via (32) is disposed through the inner side of the main cavity (2) and one end of which is located in the installation and storage area, wherein the number of the high-voltage electrical vias (32) is not less than two and they are symmetrically distributed around the center of the main cavity (2); and 15-pin electric via (33) is provided through the outer wall of the main cavity (2).

4. The experimental device for trapping cold molecular ions according to claim 1, characterized in that: The vacuum pumping component (4) comprises: A mechanical pump (41) is fixedly mounted on the frame (1); A molecular pump (42) is fixedly mounted on the frame (1), with its air extraction end passing through the main cavity (2) and extending into the installation and storage area, wherein the mechanical pump (41) and the molecular pump (42) are connected via a corrugated hose; A titanium pump (43) is fixedly mounted on the frame (1), wherein the titanium pump (43) is also provided with a titanium wire having one end penetrating through the main cavity (2) and extending into the installation and storage area; and The vacuum gauge (44) is fixedly mounted on the outside of the main cavity (2), and its detection end penetrates and extends into the installation and storage area.

5. The trapped cold molecular ion experimental device according to claim 2, characterized in that: The laser cooling component (5) is a laser, and the laser beam generated by the laser can pass through the cavity mirror (8) and irradiate the installation and storage area.

6. The experimental device for trapping cold molecular ions according to claim 2, characterized in that: The optical measurement component (6) comprises: An optical fiber rack (61) is fixedly mounted on the rack (1), one end of which passes through the main cavity (2) and extends into the installation and storage area; An adjusting bracket (62) is arranged on the frame (1), and the adjusting bracket and the frame (1) are arranged perpendicular to each other as a whole; A camera (63) is disposed on the adjustment bracket (62), wherein the shooting end of the camera (63) is aligned with the top window (9) to shoot the installation and storage area; and The breadboard (64) is fixedly mounted on the frame (1) and has a horizontal building surface.

7. The trapped cold molecular ion experimental device according to claim 6, characterized in that: The optical fiber rack (61) comprises: A mounting seat (611) is fixedly mounted on the frame (1) and has a horizontal mounting surface; A three-dimensional translation stage (612) is fixedly mounted on a mounting surface of the mounting seat (611); A connecting rod (613), one end of which is fixedly mounted on the displacement end of the three-dimensional translation platform (612), and the other end of which passes through the main cavity (2) and extends into the installation and storage area; and The peeled optical fiber portion (614) is fixedly mounted on an end portion of the connecting rod (613) that is away from the three-dimensional translation platform (612).

8. The experimental device for trapping cold molecular ions according to claim 6, characterized in that: The adjusting bracket (62) comprises: A bracket base (621) is fixedly mounted on a surface of a side of the main cavity (2) away from the frame (1); An XY linear translation stage (622) is fixedly mounted on a side surface of the support base (621) away from the frame (1); A connecting plate (623) is fixedly mounted on the moving end of the XY linear translation stage (622); A Z-axis lifting platform (624) is fixedly mounted on the other side surface of the connecting plate (623); A lifting guide column (625) is fixedly mounted on the other side surface of the Z-axis lifting platform (624); A mounting frame (626) connected to the outer side of the lifting guide column (625) by bolts; and The connecting fixture (627) is fixedly mounted on the mounting frame (626) and is connected to the camera (63).

9. The experimental device for trapping cold molecular ions according to claim 6, characterized in that: A lens barrel (10) is fixedly connected to the shooting end of the camera (63), and an objective lens (11) is fixedly mounted on the top viewing window (9), wherein the centers of the lens barrel (10) and the objective lens (11) are both located on the same vertical line, and a beam splitting cube (12) is provided at one end of the objective lens (11) away from the top viewing window (9), wherein the beam splitting cube (12) is located between the lens barrel (10) and the objective lens (11), and a beam splitter arranged at a forty-five degree angle is provided in the beam splitting cube (12).

Images