Method and system for testing trace alkali metal in microminiature atomic gas chamber

Abstract

The invention provides a method and system for testing trace alkali metal in a microminiature atomic air chamber, and the method comprises the steps: placing the atomic air chamber in an air chamber groove, heating the atomic air chamber through a heating module, cooling a refrigeration rod through a refrigeration module, pressing the refrigeration rod through a pressing rod and a spring, and enabling the refrigeration rod to be in good contact with the atomic air chamber, the atomic gas chamber cannot be broken due to stress, and the ratio R of the diameter R of the end face of the refrigeration rod to the side length A of the atomic gas chamber is 0.1 A; the alkali metal in the atomic gas chamber is condensed into a large alkali metal liquid drop at the contact part of the atomic gas chamber and the refrigeration rod under the action of the heating module and the refrigeration module, the alkali metal liquid drop is photographed by a microscope, and the content of the alkali metal in the atomic gas chamber is calculated. According to the technical scheme, the technical problems that in the prior art, trace alkali metal in the microminiature atomic gas chamber is distributed in a scattered mode, local alkali metal is overlapped, and the area cutting error is large in the area calculation process are solved.

Description

Technical Field

[0001] The present invention relates to the field of quantum sensing technology, and in particular to a method and system for testing trace alkali metals in a micro-sized atomic gas chamber. Background Art

[0002] The atomic gas chamber is one of the core components of the atomic device. The atomic gas chamber and the atoms inside it constitute the sensitive meter of the atomic device. The atomic gas chamber is the place for atomic spin manipulation, and the object of manipulation is the multi-component atoms filled in the gas chamber. The type and quantity of atoms filled in the gas chamber are important parameters of the atomic gas chamber, among which the amount of alkali metals is an important indicator affecting the performance of the gas chamber. Too much alkali metal will block the light-transmitting surface and affect the light transmission; too little alkali metal will reduce the life of the gas chamber, but the alkali metal in the gas chamber cannot be weighed and directly measured because it is sealed inside the gas chamber.

[0003] According to the investigation, there is currently an imaging method to determine the amount of alkali metals in the gas chamber, but the trace alkali metals in the micro-atomic gas chamber are scattered and the local alkali metals overlap. The area cutting error is large during the area calculation process. Therefore, it is necessary to study the non-destructive measurement method of alkali metals in the atomic gas chamber. Summary of the invention

[0004] The present invention provides a method and system for testing trace alkali metals in a micro-atomic gas chamber, which can solve the technical problems in the prior art that trace alkali metals in the micro-atomic gas chamber are scattered, local alkali metals overlap, and large area cutting errors are caused during area calculation.

[0005] According to one aspect of the present invention, a method for testing trace alkali metals in a micro-sized atomic gas chamber is provided, and the method for testing trace alkali metals in a micro-sized atomic gas chamber comprises: placing the atomic gas chamber in a gas chamber groove, heating the atomic gas chamber with a heating module, cooling a cooling rod with a cooling module, pressing the cooling rod with a pressure rod and a spring to make it in good contact with the atomic gas chamber, and the atomic gas chamber will not be broken by stress, and the ratio of the end face diameter R of the cooling rod to the side length A of the atomic gas chamber is R=0.1A; under the action of the heating module and the cooling module, the alkali metal in the atomic gas chamber condenses into a large alkali metal droplet at the contact portion between the atomic gas chamber and the cooling rod, photographing the alkali metal droplet through a microscope, and calculating and obtaining the alkali metal content in the atomic gas chamber.

[0006] Further, the volume of the alkali metal droplet can be calculated according to Calculated and obtained, where h is the height of the alkali metal droplet, a is the radius of the alkali metal droplet, and θ is the contact angle between the alkali metal droplet and the glass surface.

[0007] Further, the alkali metal includes Rb, Cs or K.

[0008] According to another aspect of the present invention, a method for testing trace alkali metals in a micro-sized atomic gas chamber is provided, and the method for testing trace alkali metals in the micro-sized atomic gas chamber comprises: placing the atomic gas chamber in a gas chamber groove, heating the atomic gas chamber with a heating module, cooling a cooling rod with a cooling module, pressing the cooling rod with a pressure rod and a spring to make it in good contact with the atomic gas chamber, and the atomic gas chamber will not be broken by stress, and the ratio of the end face diameter R of the cooling rod to the side length A of the atomic gas chamber is R=0.1A; under the action of the heating module and the cooling module, the alkali metal in the atomic gas chamber condenses into a large alkali metal droplet at the contact portion between the atomic gas chamber and the cooling rod, and a differential scanning calorimeter is used to test the alkali metal in the gas chamber, and the amount of the alkali metal is estimated according to the heat absorption in the process of the alkali metal changing from solid to gas.

[0009] According to another aspect of the present invention, there is provided an alkali metal fixed-point condensation system, which is used for testing trace alkali metals in a micro-atomic gas chamber according to the above-mentioned testing method for trace alkali metals in an atomic gas chamber.

[0010] Furthermore, the alkali metal fixed-point condensation system includes a heating module, an insulation module, a refrigeration module, a refrigeration rod, a pressure rod, a spring and an air chamber groove. The pressure rod is connected to the refrigeration rod through a spring. The air chamber groove is arranged in the heating module. The refrigeration module is used to cool the refrigeration rod. The insulation module is arranged between the refrigeration module and the heating module. The atomic gas chamber is arranged in the air chamber groove. The heating module is used to heat the atomic gas chamber. The pressure rod and the spring press the refrigeration rod to make it in good contact with the atomic gas chamber.

[0011] Furthermore, the cooling module includes TEC cooling, the heat insulation module includes asbestos, and the cooling rod includes copper.

[0012] Furthermore, there are multiple air chamber grooves and multiple cooling rods, the multiple cooling rods are arranged in one-to-one correspondence with the multiple air chamber grooves, and the multiple air chamber grooves are arranged at intervals in the heating module.

[0013] By applying the technical solution of the present invention, a method for testing trace alkali metals in a micro-atomic gas chamber is provided. The method aims to solve the technical problems in the prior art that, during the area counting process, the area cannot be accurately cut due to the overlap between alkali metal droplets, and the number of droplets is large, the area of ​​a single droplet is small and the error is large. Therefore, it is proposed to use the temperature gradient to realize the fixed-point condensation of the alkali metal, redistribute the alkali metal, condense it into a large droplet, and then calculate the volume of the alkali metal. This method reduces the test error of the image method. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 A schematic diagram of calculating the volume of an alkali metal droplet according to a specific embodiment of the present invention is shown;

[0016] Figure 2 A schematic structural diagram of an alkali metal fixed-point condensation system provided according to a specific embodiment of the present invention is shown.

[0017] The above drawings include the following reference numerals:

[0018] 10. Heating module; 20. Heat insulation module; 30. Refrigeration module; 40. Refrigeration rod; 50. Pressure rod; 60. Spring; 70. Air chamber groove. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in 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.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] like Figure 1 and Figure 2 As shown, according to a specific embodiment of the present invention, a method for testing trace alkali metals in a micro-sized atomic gas chamber is provided, and the method for testing trace alkali metals in the micro-sized atomic gas chamber includes: placing the atomic gas chamber in a gas chamber groove 70, heating the atomic gas chamber with a heating module 10, cooling the cooling rod 40 with a cooling module 30, pressing the cooling rod 40 with a pressure rod 50 and a spring 60 to make it in good contact with the atomic gas chamber, and the atomic gas chamber will not be broken by stress, and the ratio of the end face diameter R of the cooling rod 40 to the side length A of the atomic gas chamber is R=0.1A; under the action of the heating module 10 and the cooling module 30, the alkali metal in the atomic gas chamber condenses into a large alkali metal droplet at the contact portion between the atomic gas chamber and the cooling rod 40, photographing the alkali metal droplet through a microscope, and calculating and obtaining the alkali metal content in the atomic gas chamber.

[0023] By applying this configuration, a method for testing trace alkali metals in a micro-atomic gas chamber is provided. This method aims to solve the technical problems in the prior art that, during the area statistics process, the area cannot be accurately cut due to the overlap of alkali metal droplets, and the number of droplets is large, the area of ​​a single droplet is small and the error is large. Therefore, it is proposed to use the temperature gradient to achieve the fixed-point condensation of the alkali metal, redistribute the alkali metal, condense it into a large droplet, and then calculate the volume of the alkali metal. This method reduces the test error of the image method.

[0024] Further, in the present invention, the volume of the alkali metal droplet can be determined according to Calculated to obtain, where h is the height of the alkali metal droplet, a is the radius of the alkali metal droplet, and θ is the contact angle between the alkali metal droplet and the glass surface. As a specific embodiment of the present invention, the alkali metal includes Rb, Cs or K.

[0025] According to another aspect of the present invention, a method for testing trace alkali metals in a micro-sized atomic gas chamber is provided, and the method for testing trace alkali metals in the micro-sized atomic gas chamber comprises: placing the atomic gas chamber in a gas chamber groove 70, heating the atomic gas chamber with a heating module 10, cooling the cooling rod 40 with a cooling module 30, pressing the cooling rod 40 with a pressure rod 50 and a spring 60 to make it in good contact with the atomic gas chamber, and the atomic gas chamber will not be broken by stress, and the ratio of the end face diameter R of the cooling rod 40 to the side length A of the atomic gas chamber is R=0.1A; under the action of the heating module 10 and the cooling module 30, the alkali metal in the atomic gas chamber condenses into a large alkali metal droplet at the contact portion between the atomic gas chamber and the cooling rod 40, and a differential scanning calorimeter is used to test the alkali metal in the gas chamber, and the amount of the alkali metal is estimated according to the heat absorption in the process of the alkali metal changing from solid to gas.

[0026] By applying this configuration, a method for testing trace alkali metals in a micro-atomic gas chamber is provided. This method aims to solve the technical problems in the prior art that, during the area statistics process, the area cannot be accurately cut due to the overlap between alkali metal droplets, and the number of droplets is large, the area of ​​a single droplet is small and the error is large. Therefore, it is proposed to use a temperature gradient to achieve point-to-point condensation of alkali metals, redistribute the alkali metals, condense them into a large droplet, and use a differential scanning calorimeter to measure the amount of alkali metals. This method reduces the test error of the image method.

[0027] According to another aspect of the present invention, there is provided an alkali metal fixed-point condensation system, which is used for the test method of trace alkali metals in a micro-atomic gas chamber as described above to test trace alkali metals in an atomic gas chamber. Specifically, the alkali metal fixed-point condensation system comprises a heating module 10, a heat insulation module 20, a refrigeration module 30, a refrigeration rod 40, a pressure rod 50, a spring 60 and an air chamber groove 70, wherein the pressure rod 50 is connected to the refrigeration rod 40 through the spring 60, the air chamber groove 70 is arranged in the heating module 10, the refrigeration module 30 is used to cool the refrigeration rod 40, the heat insulation module 20 is arranged between the refrigeration module 30 and the heating module 10, the atomic gas chamber is arranged in the air chamber groove 70, the heating module 10 is used to heat the atomic gas chamber, and the pressure rod 50 and the spring 60 press the refrigeration rod 40 to make it in good contact with the atomic gas chamber.

[0028] Further, in the present invention, the refrigeration module 30 includes TEC refrigeration, the insulation module 20 includes asbestos, and the refrigeration rod 40 includes copper.

[0029] As another embodiment of the present invention, there are multiple air chamber grooves 70 and multiple cooling rods 40 . The multiple cooling rods 40 are arranged in one-to-one correspondence with the multiple air chamber grooves 70 . The multiple air chamber grooves 70 are arranged at intervals in the heating module 10 .

[0030] In order to further understand the present invention, the following Figure 1 and Figure 2 The method and system for testing trace alkali metals in a micro-atomic gas chamber provided by the present invention are described in detail.

[0031] like Figure 1 and Figure 2 As shown, according to a specific embodiment of the present invention, a method for testing trace alkali metals in a micro-atom gas chamber is provided, which can realize the testing of the mass of alkali metals in the micro-atom gas chamber. The alkali metals can reduce the blocking of the light-transmitting surface, and at the same time reduce the optical frequency shift, so as to meet the requirements of high-precision atomic devices for gas chamber performance, thereby improving the accuracy of atomic devices.

[0032] The technical solution of the present invention:

[0033] First, the image method is used to take pictures of the alkali metal distribution under a microscope, count the area of ​​the alkali metal, calculate the volume of a single alkali metal droplet, and sum up all the volumes. However, in the area counting process, due to the overlap between the alkali metal droplets, the area cannot be accurately cut, and the number of droplets is large, the area of ​​a single droplet is small, and the error is large. Therefore, it is proposed to use the temperature gradient to achieve the fixed-point condensation of the alkali metal, redistribute the alkali metal, condense it into a large droplet, and then calculate the volume of the alkali metal.

[0034] After the alkali metal in the air chamber condenses into a large droplet, it is photographed and measured through the tool display to obtain the radius a of the alkali metal droplet and the contact angle θ between the alkali metal droplet and the glass surface. The volume of the alkali metal droplet can be calculated according to Calculated and obtained, where h is the height of the alkali metal droplet, a is the radius of the alkali metal droplet, and θ is the contact angle between the alkali metal droplet and the glass surface.

[0035] The alkali metal fixed-point condensation tool consists of a heating module, a heat insulation module, a refrigeration module, a refrigeration rod, a pressure rod, a spring, and an air chamber groove. The air chamber is placed in the air chamber groove, the heating module heats the air chamber, the refrigeration module cools the refrigeration rod, and the pressure rod and the spring press the refrigeration rod to make it in good contact with the air chamber, and the air chamber will not be broken by stress.

[0036] The heating module of the device adopts heating rod for heating; the cooling module adopts TEC cooling, which has simple structure and high cooling efficiency; the heat insulation module adopts asbestos; the cooling rod adopts copper with good thermal conductivity.

[0037] According to experience, the optimal ratio of the end diameter R of the refrigeration rod to the side length A of the air chamber is R = 0.1 A. Alkali metals have the highest condensation efficiency and the condensation point has the best effect, presenting a single circular point.

[0038] Alkali metals can be: Rb, Cs, K

[0039] Second, using a differential scanning calorimeter and an alkali metal condensation tool, the scattered alkali metals are condensed into one point. The alkali metals in the gas chamber are tested using a differential scanning calorimeter, and the amount of alkali metals is estimated based on the heat absorption during the process of the alkali metals changing from solid to gas.

[0040] In summary, the present invention provides a method and system for testing trace alkali metals in a micro-atomic gas chamber. The alkali metal fixed-point condensation tool can effectively condense the alkali metal into an alkali metal droplet. The volume of the alkali metal droplet can be calculated by the imaging method, thereby reducing the testing error of the imaging method.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for testing trace alkali metals in a micro-atomic gas chamber, characterized in that: The method for testing trace alkali metals in the micro-atom gas chamber comprises: The atomic gas chamber is placed in the gas chamber groove (70), the heating module (10) heats the atomic gas chamber, the cooling module (30) cools the cooling rod (40), the pressing rod (50) and the spring (60) press the cooling rod (40) to make it in good contact with the atomic gas chamber, and the atomic gas chamber will not be broken by stress, and the ratio of the end face diameter R of the cooling rod (40) to the side length A of the atomic gas chamber is R=0.1A; Under the action of the heating module (10) and the cooling module (30), the alkali metal in the atomic gas chamber condenses into a large alkali metal droplet at the contact portion between the atomic gas chamber and the cooling rod (40). The alkali metal droplet is photographed through a microscope to calculate the alkali metal content in the atomic gas chamber.

2. The method for testing trace alkali metals in a micro-atom gas chamber according to claim 1, characterized in that: The volume of the alkali metal droplet can be determined according to Calculated and obtained, where h is the height of the alkali metal droplet, a is the radius of the alkali metal droplet, and θ is the contact angle between the alkali metal droplet and the glass surface.

3. The method for testing trace alkali metals in a micro-atom gas chamber according to claim 2, characterized in that: The alkali metal includes Rb, Cs or K.

4. A method for testing trace alkali metals in a micro-atomic gas chamber, characterized in that: The method for testing trace alkali metals in the micro-atom gas chamber comprises: The atomic gas chamber is placed in the gas chamber groove (70), the heating module (10) heats the atomic gas chamber, the cooling module (30) cools the cooling rod (40), the pressing rod (50) and the spring (60) press the cooling rod (40) to make it in good contact with the atomic gas chamber, and the atomic gas chamber will not be broken by stress, and the ratio of the end face diameter R of the cooling rod (40) to the side length A of the atomic gas chamber is R=0.1A; Under the action of the heating module (10) and the cooling module (30), the alkali metal in the atomic gas chamber condenses into a large alkali metal droplet at the contact portion between the atomic gas chamber and the cooling rod (40). The alkali metal in the gas chamber is tested using a differential scanning calorimeter, and the amount of the alkali metal is estimated based on the heat absorption during the process of the alkali metal changing from solid to gas.

5. An alkali metal fixed-point condensation system, characterized in that: The alkali metal fixed-point condensation system is used for testing trace alkali metals in a micro-atomic gas chamber according to any one of claims 1 to 4 to test trace alkali metals in an atomic gas chamber.

6. The alkali metal fixed-point condensation system according to claim 5, characterized in that: The alkali metal fixed-point condensation system comprises a heating module (10), an insulation module (20), a refrigeration module (30), a refrigeration rod (40), a pressure rod (50), a spring (60) and an air chamber groove (70), wherein the pressure rod (50) is connected to the refrigeration rod (40) via the spring (60), the air chamber groove (70) is arranged in the heating module (10), the refrigeration module (30) is used for cooling the refrigeration rod (40), the insulation module (20) is arranged between the refrigeration module (30) and the heating module (10), the atomic gas chamber is arranged in the air chamber groove (70), the heating module (10) is used for heating the atomic gas chamber, and the pressure rod (50) and the spring (60) press the refrigeration rod (40) to make it in good contact with the atomic gas chamber.

7. The alkali metal fixed-point condensation system according to claim 6, characterized in that: The refrigeration module (30) includes TEC refrigeration, the thermal insulation module (20) includes asbestos, and the refrigeration rod (40) includes copper.

8. The alkali metal fixed-point condensation system according to claim 7, characterized in that: There are a plurality of air chamber grooves (70), and there are a plurality of cooling rods (40). The plurality of cooling rods (40) are arranged in a one-to-one correspondence with the plurality of air chamber grooves (70), and the plurality of air chamber grooves (70) are arranged at intervals in the heating module (10).

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