An experimental device for trapping cold molecular ions

Abstract

This invention relates to the field of optical instrument technology and discloses an experimental device for trapping cold molecular ions. The device includes a frame placed on the ground, and further comprises: a main cavity, fixedly mounted on the 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, disposed on the main cavity, for forming a three-dimensional trapping potential well for charged ions; a vacuum pumping component, disposed on the frame and connected to the main cavity, for creating a vacuum environment within the installation and storage area of ​​the main cavity; a laser cooling component, disposed on the main cavity and connected to the installation and storage area within the main cavity; and an optical measurement component, disposed on the main cavity for measuring the state of ions within the installation and storage area of ​​the main cavity. The purpose of this experimental device for trapping cold molecular ions is to solve the problems of large footprint, non-compact structure, and high construction costs in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of optical instrument technology, specifically to an experimental device for trapping cold molecular ions. Background Technology

[0002] In cutting-edge research in physics and chemistry, cold molecular ions have attracted much attention due to their unique physical and chemical properties. To explore these properties in depth, an experimental device capable of stably trapping, cooling, and observing cold molecular ions is needed. Existing experimental devices for trapping cold molecular ions typically 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 fundamental laws governing their interactions with light, electric fields, and magnetic fields. In addition, cold molecular ions also have enormous application potential in fields such as quantum computing, quantum communication, and precision measurement.

[0003] However, the non-compact design of existing trapping cold molecular ion experimental devices presents numerous challenges. Their large size not only limits the use of space 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. This not only increases the difficulty of connection and debugging, but may also lead to signal attenuation and energy loss, thereby affecting the stability and accuracy of the experiment. More seriously, due to the large size of the device, it is also more sensitive to environmental changes. For example, changes in external temperature may cause thermal expansion and contraction inside the device, which in turn affects the relative position and accuracy between the components. At the same time, the optical measurement environment is also easily affected by 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 experimental results. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of large footprint, non-compact structure and high construction cost in the prior art, and to propose an experimental device for trapping cold molecular ions.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] An experimental apparatus for trapping cold molecular ions includes a rack placed on the ground, and further includes:

[0007] The main cavity is fixedly installed on the surface of the frame away from the ground, and the inner side of the main cavity is provided with an installation and storage area;

[0008] An electric field trapping component is disposed on the main cavity, which is used to form a three-dimensional trapping potential well for charged ions;

[0009] The vacuum assembly, mounted on the frame and connected to the main chamber, is used to create a vacuum environment within the installation and storage area of ​​the main chamber.

[0010] The laser cooling component is mounted on the main cavity and is connected to the installation and storage area within the main cavity.

[0011] An optical measurement component, mounted on the main cavity, is used to measure the state of ions within the storage area of ​​the main cavity.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, a number of light-transmitting flanges are fixedly installed on the outer side of the main cavity, with one end penetrating and extending into the inner side of the main cavity. The number of light-transmitting flanges are symmetrically distributed around the center of the main cavity. A cavity mirror is also fixedly installed on the inner side of the light-transmitting flange. The cavity mirror is made entirely of fused silica. A top viewing window is embedded at the end of the main cavity away from the frame. The top viewing window is also made of fused silica.

[0014] Furthermore, the electric field trapping component includes:

[0015] An ion trap is located inside the main cavity and within the installation and storage area.

[0016] A high-voltage electrical circuit is installed throughout the inner side of the main cavity, with one end located within the installation and storage area. There are at least two high-voltage electrical circuits, symmetrically distributed around the center of the main cavity.

[0017] A 15-pin electro-pneumatic catheter is inserted through the outer wall of the main cavity.

[0018] Furthermore, the vacuum assembly includes:

[0019] Mechanical pump, fixedly mounted on a frame;

[0020] A molecular pump is fixedly mounted on a frame, with its suction end penetrating the main cavity and extending into the installation and storage area. The mechanical pump and the molecular pump are connected by a corrugated hose.

[0021] A titanium pump, fixedly mounted on a frame, includes a titanium wire that extends from one end through the main cavity into the installation and storage area; and

[0022] The vacuum gauge is fixedly installed on the outside of the main cavity, with its detection end penetrating and extending into the installation and storage area.

[0023] Furthermore, the laser cooling component is a laser, and the laser beam generated by the laser can pass through the cavity mirror and irradiate the installation and storage area.

[0024] Furthermore, the optical measurement component includes:

[0025] The fiber optic frame is fixedly installed on the rack, with one end penetrating the main cavity and extending into the installation and storage area;

[0026] The adjustment bracket is mounted on the frame and is perpendicular to the frame.

[0027] A camera, mounted on an adjustable bracket, with its shooting end aligned with the top viewing window for capturing images within the mounting and storage area; and

[0028] The breadboard is fixedly installed on the frame and has a horizontal mounting surface.

[0029] Furthermore, the fiber optic frame includes:

[0030] Mounting base, fixedly mounted on the frame, has a horizontal mounting surface;

[0031] A three-dimensional translation stage is fixedly installed on the mounting surface of the mounting base;

[0032] A connecting rod, one end of which is fixedly mounted on the displacement end of the three-dimensional translation stage, and the other end passing through the main cavity and extending into the installation and storage area; and

[0033] The stripped fiber section is fixedly installed on the end of the connecting rod away from the three-dimensional translation stage.

[0034] Furthermore, the adjustment bracket includes:

[0035] The bracket base is fixedly installed on the surface of the main cavity away from the frame;

[0036] The XY linear translation stage is fixedly installed on the surface of the support base away from the machine frame.

[0037] The connecting plate is fixedly installed on the moving end of the XY linear translation stage;

[0038] The Z-axis lifting platform is fixedly installed on the other side surface of the connecting plate;

[0039] The lifting guide column is fixedly installed on the other side surface of the Z-axis lifting table;

[0040] The mounting bracket is bolted to the outside of the lifting guide column; and

[0041] The connecting clamp is fixedly installed on the mounting bracket and connected to the camera.

[0042] 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. The center of the lens barrel and the objective lens are both located on the same vertical line. A beam splitter cube is provided at the end of the objective lens away from the top window. The beam splitter cube is located between the lens barrel and the objective lens, and a beam splitter plate is provided in the beam splitter cube at a 45-degree angle.

[0043] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0044] This invention significantly optimizes the overall structural design of the device and reduces its footprint by employing a compact frame and a main cavity fixedly mounted on the side of the frame away from the ground. Secondly, the electric field trapping component, by forming a three-dimensional trapping potential well for charged ions, can stably trap cold molecular 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 ensures that the installation and storage area within the main cavity forms a vacuum environment, which is beneficial for reducing the impact of ions on the back surface. The collision of atmospheric gases, the extension of ion confinement time, and the improvement of experimental precision are all crucial. The efficient operation of the vacuum pumping component can effectively reduce the interference of the external environment on the experimental results, thereby improving the accuracy and reliability of the experiment. In addition, the laser cooling component, which is connected to the installation and storage area in the main cavity through laser technology, can cool the ions and bring them to a low temperature state close to absolute zero. Finally, the optical measurement component 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. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall connection structure of the present invention;

[0046] Figure 2 This is a schematic diagram of the connection structure between the frame and the main cavity of the present invention;

[0047] Figure 3 This is a schematic diagram of the connection structure between the main cavity and the electric field trapping component of the present invention;

[0048] Figure 4 This is a schematic diagram of the connection structure between the main cavity and the vacuum assembly of the present invention;

[0049] Figure 5 This is a schematic diagram of the fiber optic frame structure of the present invention;

[0050] Figure 6 This is a schematic diagram of the connection structure between the adjustment bracket and the camera according to the present invention.

[0051] In the diagram: 1. Frame; 2. Main cavity; 3. Electric field trapping assembly; 31. Ion trap; 32. High voltage electric shock circuit; 33. 15-pin electric shock circuit; 4. Vacuum pump assembly; 41. Mechanical pump; 42. Molecular pump; 43. Titanium pump; 44. Vacuum gauge; 5. Laser cooling assembly; 6. Optical measurement assembly; 61. Fiber optic frame; 611. Mounting base; 612. 3D translation stage; 613. Connecting rod; 614. Stripped fiber section; 62. Adjustment bracket; 621. Bracket base; 622. XY linear translation stage; 623. Connecting plate; 624. Z-axis lifting stage; 625. Lifting guide column; 626. Mounting bracket; 627. Connecting clamp; 63. Camera; 64. Breadboard; 7. Light-transmitting flange; 8. Cavity mirror; 9. Top window; 10. Mirror tube; 11. Objective lens; 12. Beam splitter cube. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Combination Figures 1-6 As shown, an experimental apparatus for trapping cold molecular ions according to the present invention includes a frame 1 placed on the ground, and further includes:

[0054] The main cavity 2 is fixedly installed on the surface of the frame 1 away from the ground, and the inner side of the main cavity 2 is provided with an installation and storage area;

[0055] An electric field trapping component 3 is disposed on the main cavity 2, which is used to form a three-dimensional trapping potential well for charged ions;

[0056] The vacuum assembly 4 is mounted on the frame 1 and connected to the main chamber 2. It is used to create a vacuum environment in the installation and storage area of ​​the main chamber 2.

[0057] The laser cooling component 5 is mounted on the main cavity 2 and is connected to the installation and storage area inside the main cavity 2.

[0058] The optical measurement component 6 is mounted on the main cavity 2 and is used to measure the state of ions in the storage area of ​​the main cavity 2.

[0059] The experimental setup is based on a frame 1, which is securely placed on the ground to provide support for the entire apparatus. The main cavity 2 is fixedly mounted on the side of the frame 1 away from the ground, with a dedicated storage area inside for containing and trapping cold molecular ions. An electric field trapping component 3 is installed on the main cavity 2. This component, through a precisely controlled electric field, forms a three-dimensional trapping potential well for charged ions inside the main cavity 2. This potential well stably traps the cold molecular ions, preventing them from escaping during the experiment, thus ensuring the continuity and accuracy of the experiment. To ensure a pure experimental environment and reduce external interference, a vacuum pumping component 4 is installed on the frame 1 and connected to the main cavity 2. The vacuum pumping component 4 efficiently evacuates the storage area of ​​the main cavity 2. A vacuum environment significantly reduces the probability of collisions between ions and the background gas, prolongs the ion trapping time, and improves experimental precision. Regarding laser cooling, the laser cooling component 5 is cleverly positioned on the main cavity 2 and interconnected with the installation and storage area within the main cavity 2. The laser cooling component 5 emits a laser of a specific frequency, interacting with the cold molecular ions trapped within the main cavity 2, thereby cooling the ions. The cooled ions are more stable, facilitating more in-depth research. Finally, to monitor and infer the quantity and state of ions in real time, an optical measurement component 6 is positioned on the main cavity 2. This component indirectly infers the quantity and state of ions by measuring the fluorescence intensity of ions within the installation and storage area of ​​the main cavity 2, providing valuable experimental data.

[0060] In a preferred embodiment, the present invention may be further configured as follows: Figure 3 , Figure 4As shown; several light-transmitting flanges 7 are fixedly installed on the outer side of the main cavity 2, with one end penetrating and extending to the inner side of the main cavity 2. These light-transmitting flanges 7 are symmetrically distributed around the center of the main cavity 2. A cavity mirror 8 is also fixedly installed inside the light-transmitting flange 7. The cavity mirror 8 is entirely made of fused silica. A top viewing window 9, also made of fused silica, is embedded at the end of the main cavity 2 away from the frame 1. Several light-transmitting flanges 7 are fixedly installed on the outer side of the main cavity 2, with one end penetrating and extending to the inner side of the main cavity 2. These light-transmitting flanges 7 are symmetrically distributed around the center of the main cavity 2. This design not only ensures uniform light distribution but also helps improve the accuracy and efficiency of optical measurements. Inside the light-transmitting flanges 7… Cavity mirrors 8 are also fixedly installed. These cavity mirrors 8 are made entirely of fused silica, a material with optical properties and thermal stability. This material can effectively reduce the loss and distortion of light during propagation, ensuring the quality and stability of the light. The placement of cavity mirrors 8 not only helps with 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 viewing window 9 is also embedded at the end of the main cavity 2 away from the frame 1. This top viewing window 9 is also made of fused silica. It provides a clear and transparent observation window, allowing direct observation of the internal situation of the main cavity 2. At the same time, the top viewing window 9 made of fused silica also has good optical properties and thermal stability, ensuring the accuracy and long-term stability of the observation.

[0061] In a preferred embodiment, the present invention may be further configured as follows: Figure 2 , Figure 3 As shown; the electric field trapping component 3 includes:

[0062] An ion trap 31 is disposed inside the main cavity 2 and located within the installation and storage area; and

[0063] A high-voltage electric shock circuit 32 is installed inside the main cavity 2, with one end located within the installation and storage area. There are at least two high-voltage electric shock circuits 32, symmetrically distributed around the center of the main cavity 2.

[0064] Fifteen high-voltage electric traps 33 are installed through the outer wall of the main cavity 2. Ion traps 31 are located inside the main cavity 2, precisely within the installation and storage area. This area is the primary location for trapping and studying cold molecular ions. The ion traps 31, through a precisely designed electric field structure, generate a strong trapping potential, firmly confining charged ions within the trap and preventing escape. Simultaneously, high-voltage electric traps 32 also play a crucial role. These high-voltage electric traps 32 are installed through the inner wall of the main cavity 2, and one of them... The terminals are located in the installation and storage area, and there are no fewer than two of them. They are symmetrically distributed around the center of the main cavity 2. This design is for the axial extraction of trapped ions in subsequent experiments. The 15-pin electric trap, by applying DC and AC electric fields, works together with the ion trap 31 to form a powerful three-dimensional trapping potential trap. This potential trap can accurately trap charged ions and manipulate and study them. The 15-pin electric trap has 15 interfaces, and each electric trap can connect 15 independent wires.

[0065] In a preferred embodiment, the present invention may be further configured as follows: Figure 1 , Figure 4 As shown; the vacuum assembly 4 includes:

[0066] Mechanical pump 41 is fixedly installed on frame 1;

[0067] Molecular pump 42 is fixedly installed on frame 1, and its suction end passes through main cavity 2 and extends into installation and storage area. Mechanical pump 41 and molecular pump 42 are connected by corrugated hose.

[0068] Titanium pump 43 is fixedly mounted on frame 1, and titanium pump 43 is also provided with a titanium wire that passes through the main cavity 2 and extends into the installation and storage area; and

[0069] Vacuum gauge 44 is fixedly installed on the outside of the main chamber 2, with its detection end penetrating and extending into the installation and storage area. The vacuum pumping assembly 4 ensures that the installation and storage area within the main chamber 2 reaches the required vacuum level to reduce interference from background gas on cold molecular ions, thus guaranteeing the accuracy and stability of the experiment. This function is achieved through the collaborative operation of mechanical pump 41, molecular pump 42, titanium pump 43, and vacuum gauge 44. First, mechanical pump 41 is fixedly installed on the frame 1. As the initial stage of vacuum pumping, it can initially extract the gas from the main chamber 2, reducing the gas pressure within the main chamber 2. Mechanical pump 41 operates stably and reliably, providing a foundation for subsequent high-vacuum extraction. Next, molecular pump 42 is also fixedly installed on the frame 1, with its pumping end penetrating the main chamber 2 and extending into the installation and storage area. Molecular pump 42 uses high-speed rotating turbine blades to accelerate and expel gas molecules, enabling… The pressure inside the main chamber 2 can be further reduced to achieve a higher vacuum. Meanwhile, the mechanical pump 41 and the molecular pump 42 are connected via a corrugated hose, ensuring the continuity and stability of gas extraction. In addition, a titanium pump 43 is also fixedly mounted on the frame 1. It utilizes the property of titanium wire to adsorb gas at high temperatures, further reducing the pressure inside the main chamber 2 to achieve a high vacuum or even ultra-high vacuum. One end of the titanium wire on the titanium pump 43 penetrates the main chamber 2 and extends into the installation and storage area, ensuring maximum adsorption effect. The titanium wire is evaporated to adsorb the remaining water and hydrogen in the chamber. Finally, a vacuum gauge 44 is fixedly mounted on the outside of the main chamber 2, with its detection end penetrating and extending into the installation and storage area for real-time monitoring of the vacuum level inside the main chamber 2. The precise measurement by the vacuum gauge 44 provides crucial data support for the experimenters, ensuring the stability and controllability of the experimental environment.

[0070] In a preferred embodiment, the present invention may 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 the installation and storage area. The laser cooling component 5 is specifically implemented as a laser in this experimental setup. This design aims to achieve ion cooling by utilizing the interaction between the laser and cold molecular ions. As the core component of the laser cooling component 5, the laser 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, as a key component inside the light-transmitting flange 7, is made entirely of fused silica. This material has excellent optical properties and thermal stability, which can effectively reduce the loss and distortion of light during propagation. Therefore, the laser beam can pass smoothly and... The laser beam passes efficiently through the cavity mirror 8 without significant interference or attenuation. After passing through the cavity mirror 8, it accurately irradiates the installation and storage area inside the main cavity 2. In this area, the cold molecular ions are bound by the three-dimensional trapping potential well formed by the electric field trapping component 3. When the laser beam interacts with these ions, the Doppler cooling effect occurs, 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 motion state, which helps to more accurately observe and control the behavior of ions during experiments. 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.

[0071] In a preferred embodiment, the present invention may be further configured as follows: Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown; the optical measurement component 6 includes:

[0072] The fiber optic frame 61 is fixedly installed on the rack 1, with one end penetrating the main cavity 2 and extending into the installation and storage area;

[0073] An adjustment bracket 62 is mounted on the frame 1, and its entirety is perpendicular to the frame 1.

[0074] Camera 63 is mounted on an adjustable bracket 62, with the shooting end of camera 63 aligned with the top viewing window 9 for capturing images within the mounting and storage area; and

[0075] Breadboard 64, fixedly mounted on rack 1, has a horizontal mounting surface. Fiber optic bracket 61, fixedly mounted on rack 1, extends one end through the main cavity 2 and into the installation and storage area. This design allows the fiber optic cable to be directly connected to the core area of ​​the experiment to guide laser or other optical signals for the excitation or detection of cold molecular ions. The stability and accuracy of fiber optic bracket 61 are crucial for ensuring the accuracy of optical measurements. Adjustment bracket 62 is mounted on rack 1 and is perpendicular to rack 1. This design allows adjustment bracket 62 to flexibly adjust its height and angle to precisely align camera 63 with the top. The top window 9, made of fused silica, provides a clear and transparent observation window, allowing the camera 63 to clearly capture images of the cold molecular ions within the storage area. The camera 63 is mounted on the adjustment bracket 62, with its imaging end aligned with the top window 9. During the experiment, the camera 63 captures and records fluorescence images or videos of the cold molecular ions within the 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 mounted on the frame 1 and has a horizontal mounting surface for mounting other optical components or circuits to expand the functionality and flexibility of the experimental setup.

[0076] In a preferred embodiment, the present invention may be further configured as follows: Figure 4 , Figure 5 As shown; the fiber optic frame 61 includes:

[0077] Mounting base 611 is fixedly mounted on frame 1 and has a horizontal mounting surface;

[0078] A three-dimensional translation stage 612 is fixedly installed on the mounting surface of the mounting base 611;

[0079] 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 passing through the main cavity 2 and extending into the installation and storage area; and

[0080] The shed fiber section 614 is fixedly mounted on the end of the connecting rod 613 away from the three-dimensional translation stage 612. The fiber frame 61, as a key component of the optical measurement assembly 6, primarily functions to precisely introduce the fiber into the mounting and storage area of ​​the main cavity 2, ensuring accurate positioning of the cooling light. The design of the fiber frame 61 fully considers stability and accuracy to ensure the accuracy of optical measurements. First, the mounting base 611, as the basic component of the fiber frame 61, is fixedly mounted on the frame 1. The mounting base 611 has a horizontal mounting surface, ensuring stable installation of subsequent components. Next, the three-dimensional translation stage 612 is fixedly mounted on the mounting surface of the mounting base 611. The three-dimensional translation stage 612 has translational capabilities in three directions, allowing for precise adjustment in both the horizontal and vertical directions. This design enables the fiber frame 61 to flexibly adjust the fiber position, ensuring the fiber can accurately extend into the middle region of the ion trap, guiding the cooling light smoothly to this position for subsequent laser cooling. The connecting rod 613 serves as the transmission link between the fiber frame 61 and the optical fiber. The moving part, one end of which is fixedly installed on the displacement end of the three-dimensional translation stage 612, has a connecting rod 613 designed to ensure both the stability of the optical fiber and its smooth passage through the main cavity 2 and extension into the installation and storage area. At the other end of the connecting rod 613, the peeled fiber section 614 is fixedly installed. The peeled fiber section 614 is the end part of the optical fiber, which has been specially treated to remove the protective layer of the optical fiber, exposing the fiber core and guiding the position of the cooling light so that the cooling light can optically interact with the cold molecular ions. During the experiment, by adjusting the three-dimensional translation stage 612, the position of the peeled fiber section 614 can be precisely controlled to align it with the cold molecular ions in the installation and storage area. Then, the cold molecular ions are excited or detected by guiding the laser or other optical signals through the optical fiber. Due to the high stability and accuracy of the fiber frame 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. Its specific structure and working principle can be found through search and need not be elaborated here.

[0081] In a preferred embodiment, the present invention may be further configured as follows: Figure 5 , Figure 6 As shown; the adjusting bracket 62 includes:

[0082] The bracket base 621 is fixedly installed on the surface of the main cavity 2 away from the frame 1;

[0083] The XY linear translation stage 622 is fixedly installed on the side surface of the bracket base 621 away from the frame 1;

[0084] The connecting plate 623 is fixedly installed on the moving end of the XY linear translation stage 622;

[0085] The Z-axis lifting platform 624 is fixedly installed on the other side surface of the connecting plate 623;

[0086] The lifting guide column 625 is fixedly installed on the other side surface of the Z-axis lifting table 624;

[0087] Mounting bracket 626 is bolted to the outside of lifting guide column 625; and

[0088] The connecting clamp 627 is fixedly mounted on the mounting bracket 626 and interconnected with the camera 63. The adjusting bracket 62, as an important component of the optical measurement assembly 6, primarily functions to achieve precise mounting and position adjustment of the camera 63 on the top of the main cavity 2. By adjusting the various components of the adjusting bracket 62, the shooting angle and position of the camera 63 can be flexibly adjusted to ensure accurate capture of images of cold molecular ions within the mounting and storage area. Firstly, the bracket base 621 is fixedly mounted on the 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 surface of the support base 621 away from the frame 1, allowing the camera 63 to perform precise two-dimensional translation adjustments in the horizontal plane. The connecting plate 623 is fixedly mounted on the moving end of the XY linear translation stage 622, acting as a bridge connecting the XY linear translation stage 622 and the Z-axis lifting stage 624, ensuring that the Z-axis lifting stage 624 can move with the XY linear translation stage 622. The Z-axis lifting stage 624 is fixedly mounted on the other side of the connecting plate 623, allowing the camera 63 to perform precise vertical lifting adjustments. The guide column 625 is fixedly mounted on the other side surface of the Z-axis lifting platform 624. It serves as a support structure for the mounting bracket 626, ensuring its stability and verticality. The mounting bracket 626 is bolted to the outside of the lifting guide column 625. It provides a platform for roughly adjusting the vertical position of the camera 63. Finally, the connecting clamp 627 is fixedly mounted on the mounting bracket 626 and connected to the camera 63. The design of the connecting clamp 627 ensures that the camera 63 can be securely mounted on the adjusting bracket 62, and its position can be precisely adjusted through the various components of the adjusting bracket 62. During the experiment, the operator can 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 coarsely adjusted by the mounting bracket 626, and then finely adjusted by the Z-axis lifting stage 624 to further refine the vertical position of the camera 63 and 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 Z-axis lifting device in the existing high-precision machine tool, and need not be described in detail here.

[0089] In a preferred embodiment, the present invention may be further configured as follows: Figure 1 , Figure 6 As shown; a lens barrel 10 is fixedly connected to the shooting end of camera 63, and an objective lens 11 is fixedly mounted on the top window 9. The centers of the lens barrel 10 and the objective lens 11 are located on the same vertical line. A beam splitter cube 12 is set at the end of the objective lens 11 away from the top window 9, and the beam splitter cube 12 is located between the lens barrel 10 and the objective lens 11. The beam splitter cube 12 contains a beam splitter set at a 45-degree angle. In the cold molecular ion confinement experimental device, camera 63, as the core component of optical measurement assembly 6, undertakes the important task of capturing and recording cold molecular ion images. In order to improve the shooting effect and accuracy, a lens barrel 10 is fixedly connected to the shooting end of camera 63. The lens barrel 10, as a protective and guiding structure, can ensure that the lens of camera 63 is precisely aligned with the subsequent optical components. At the same time, the lens barrel 10 can also reduce the interference of external light on the shooting and improve the shooting quality. An objective lens 11 is fixedly mounted on the top window 9. The objective lens 11, as a magnifying and focusing lens, can magnify and focus the image of the stored image. The cold molecular ions in the imaging area are magnified and focused onto the lens of camera 63. To ensure the accuracy of the image, the centers of the microscope tube 10 and the objective lens 11 are located on the same vertical line. This ensures that the path of light from the objective lens 11 to the camera 63 is the shortest and most accurate. At the end of the objective lens 11 away from the top viewing window 9, a beam splitter 12 is set. The beam splitter 12 is located between the microscope tube 10 and the objective lens 11. Inside the beam splitter is a beam splitter set at a 45-degree angle. This beam splitter can split the light from the objective lens 11 into two beams. One beam is directly directed to the camera 63 to capture the image of the cold molecular ions. The other beam is sent to a fluorescence counter to measure the fluorescence intensity of the ions and infer the number and state of the ions. Due to the special design of the beam splitter 12 and the beam splitter, they can achieve effective distribution and utilization of light without interfering with the image capture of camera 63. At the same time, this design also enables the experimental device to perform multiple optical measurement and analysis tasks simultaneously, improving the efficiency and accuracy of the experiment.

[0090] The specific working principle of the experimental device for trapping cold molecular ions according to the present invention is as follows:

[0091] First, the experimental setup is placed on a stable surface to ensure the frame 1 is securely installed. Then, in the fixed installation area of ​​the main cavity 2, the molecular ion samples required for the experiment are prepared through the installation and storage area on its inner side. At this time, the electric field trapping component 3 starts to work. The ion trap 31 forms a three-dimensional trapping potential well for charged ions in the installation and storage area of ​​the main cavity 2. The ion trap 31, through a precisely designed electric field structure, can generate a strong trapping potential, which firmly binds the charged ions inside the potential well and prevents them from escaping. The high-voltage electric collapsing circuit 32 axially extracts the trapped ions in subsequent experiments. The 15-pin electric collapsing circuit, by applying a DC electric field and an AC electric field, works together with the ion trap 31 to form a powerful three-dimensional trapping potential well. This potential well can precisely trap charged ions and manipulate and study them.

[0092] To ensure a pure experimental environment, the vacuum pumping assembly 4 is put into operation. The mechanical pump 41 and the molecular pump 42 are connected by a corrugated hose. The pumping end of the molecular pump 42 is inserted into the installation and storage area of ​​the main chamber 2 to extract the internal gas. The titanium wire on the titanium pump 43 is also inserted into this area to further remove residual gas. The vacuum gauge 44 continuously monitors the vacuum level in the main chamber 2 to ensure that the required standards for the experiment are met.

[0093] Subsequently, the laser cooling assembly 5 is activated, 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 silica 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.

[0094] During the cooling process, the optical measurement assembly 6 starts to work. The stripped fiber section 614 on the fiber optic frame 61 guides the light 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 stage 624 and the lifting guide column 625 on the adjustment bracket 62. The top window 9 is also made of fused silica 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. A beam splitter cube 12 and its beam splitter plates are set in the middle for beam splitting and guiding the light path, thereby capturing the ion fluorescence image in the installation and storage area.

[0095] These images allow for the measurement of ion fluorescence intensity, which in turn allows for the inference of ion quantity and state, providing crucial information for the analysis and processing of experimental data. Throughout the experiment, the various components work together to ensure the accuracy and reliability of the cold molecular ion trapping experiment.

[0096] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0097] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An experimental apparatus for trapping cold molecular ions, comprising a frame (1) placed on the ground, characterized in that, Also includes: The main cavity (2) is fixedly installed on the side surface of the frame (1) away from the ground, and the inner side of the main cavity (2) is provided with an installation and storage area; An electric field trapping component (3) is disposed on the main cavity (2) to form a three-dimensional trapping potential well for charged ions; The vacuum assembly (4) is mounted on the frame (1) and connected to the main cavity (2), which is used to create a vacuum environment in the installation and storage area of ​​the main cavity (2); The laser cooling component (5) is mounted on the main cavity (2) and is connected to the installation and storage area inside the main cavity (2); An optical measurement component (6) is installed on the main cavity (2) and is used to measure the state of ions in the storage area of ​​the main cavity (2); guide laser or other optical signals to excite or detect cold molecular ions; A plurality of light-transmitting flanges (7) with one end penetrating through and extending to the inside of the main cavity (2) are fixedly installed on the outside of the main cavity (2). The plurality of light-transmitting flanges (7) are symmetrically distributed around the center of the main cavity (2). A cavity mirror (8) is also fixedly installed on the inside of the light-transmitting flanges (7). The cavity mirror (8) is made entirely of fused silica. A top viewing window (9) is embedded at the end of the main cavity (2) away from the frame (1). The top viewing window (9) is made of fused silica. The electric field trapping component (3) includes: An ion trap (31) is located inside the main cavity (2) and within the installation and storage area; A high-voltage electric shock circuit (32) is installed through the inner side of the main cavity (2), with one end located in the installation and storage area. There are at least two high-voltage electric shock circuits (32), symmetrically distributed around the center of the main cavity (2). 15-needle electro-pneumatic tube (33) is installed through the outer wall of the main cavity (2); The vacuum pumping assembly (4) includes: Mechanical pump (41) is fixedly installed on frame (1); A molecular pump (42) is fixedly installed on a frame (1), with its pumping end penetrating the main cavity (2) and extending into the installation and storage area, wherein the mechanical pump (41) and the molecular pump (42) are connected by a corrugated hose. Titanium pump (43), fixedly mounted on frame (1), wherein titanium pump (43) is also provided with a titanium wire that extends through the main cavity (2) and into the installation and storage area; and Vacuum gauge (44) is fixedly installed on the outside of the main cavity (2), and its detection end extends through and into the installation and storage area; The optical measurement component (6) includes: The fiber optic frame (61) is fixedly installed on the rack (1), with one end penetrating the main cavity (2) and extending into the installation and storage area; the fiber optic frame (61) precisely introduces the fiber into the installation and storage area of ​​the main cavity (2) so as to accurately know the position of the cooling light, ensure that the fiber can accurately extend into the middle area of ​​the ion trap, and guide the cooling light to hit this position smoothly, so as to facilitate the subsequent laser cooling. Adjustment bracket (62) is set on frame (1) and is set perpendicular to frame (1); A camera (63) is mounted on an adjustable bracket (62), wherein the shooting end of the camera (63) is aligned with the top viewing window (9) for taking pictures within the installation and storage area; and Breadboard (64) is fixedly installed on frame (1) and has a horizontal mounting surface; The fiber optic frame (61) includes: Mounting base (611) is fixedly mounted on frame (1) and has a horizontal mounting surface; A three-dimensional translation stage (612) is fixedly installed on the mounting surface of the mounting base (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 passing through the main cavity (2) and extending into the installation and storage area; and The peeled fiber section (614) is fixedly installed on the end of the connecting rod (613) away from the three-dimensional translation stage (612) to guide the position of the cooling light so that the cooling light can optically interact with the cold molecular ions; The adjusting bracket (62) includes: The bracket base (621) is fixedly installed on the side surface of the main cavity (2) away from the frame (1); The XY linear translation stage (622) is fixedly installed on the side surface of the support base (621) away from the frame (1); The connecting plate (623) is fixedly installed on the moving end of the XY linear translation stage (622); The Z-axis lifting platform (624) is fixedly installed on the other side surface of the connecting plate (623); The lifting guide column (625) is fixedly installed on the other side surface of the Z-axis lifting table (624); Mounting bracket (626) is bolted to the outside of lifting guide column (625); and The connecting clamp (627) is fixedly installed on the mounting bracket (626) and connected to the camera (63).

2. The experimental apparatus for trapping cold molecular ions according to claim 1, 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.

3. The experimental apparatus for trapping cold molecular ions according to claim 1, characterized in that, The camera (63) has a lens barrel (10) fixedly connected to its shooting end, and an objective lens (11) fixedly installed on the top window (9). The center of the lens barrel (10) and the objective lens (11) are both located on the same vertical line. A beam splitter cube (12) is provided at the end of the objective lens (11) away from the top window (9). The beam splitter cube (12) is located between the lens barrel (10) and the objective lens (11). The beam splitter cube (12) is provided with a beam splitter set at a 45-degree angle.

Images