Spatial strontium light clock vacuum cavity and external reverse Helmholtz coil device

Abstract

A space strontium light clock vacuum cavity and external reverse Helmholtz coil device is characterized in that coil supports are symmetrically arranged at the upper end and the lower end of the vacuum cavity, reverse Helmholtz coils are wound on the outer walls of the coil supports, and coil outer covers are arranged on the outer sides of the coil supports and the reverse Helmholtz coils; a plurality of groups of horizontal light-transmitting flanges are horizontally arranged in the middle of the vacuum cavity, and through holes machined in the centers of the horizontal light-transmitting flanges are communicated with an inner cavity of the vacuum cavity; the device has the advantages of being light in weight, small in size, good in mechanical property and the like, and on the premise of equal energy consumption, the integration degree and interchangeability are improved while the light weight and the small size are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of quantum bid evaluation, and specifically relates to a space strontium optical clock vacuum cavity and an external reverse Helmholtz coil device. Background Art

[0002] As the latest generation of international reference atomic clocks, atomic optical clocks have ultra-high frequency accuracy and stability. Atomic clock technology has important strategic significance for promoting the development of science and technology and improving national defense capabilities.

[0003] The National Time Service Center began developing strontium-cooled atomic optical lattice clocks in 2006. So far, it has completed the preparation of primary and secondary cooling of strontium-cooled atomic samples, optical lattice loading, clock transition detection, closed-loop locking, and experimental measurement of some key atomic physical parameters. In the process of continuous exploration, in order to meet the development needs of space navigation, atomic clocks are integrated, miniaturized, and engineered.

[0004] The reverse Helmholtz coil device currently used is built into the vacuum, resulting in a large vacuum chamber volume and mass. The magnetic field coil continuously releases air in the vacuum, causing the vacuum difference to affect the test results. The coil has poor heat dissipation in a vacuum where heat is transferred by radiation, which increases the risk of experimental failure. Summary of the invention

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a space strontium optical clock vacuum cavity and an external reverse Helmholtz coil device with light weight, small volume, good mechanical properties, high integration and interchangeability.

[0006] The technical solution adopted to solve the above technical problems is: a space strontium optical clock vacuum cavity and an external reverse Helmholtz coil device, coil holders are symmetrically arranged at the upper and lower ends of the vacuum cavity, a reverse Helmholtz coil is wound on the outer wall of the coil holder, a coil cover is arranged on the outside of the coil holder and the reverse Helmholtz coil, and several groups of horizontal light-transmitting flanges are horizontally arranged in the middle of the vacuum cavity, and the through hole processed in the center of the horizontal light-transmitting flange is connected to the inner cavity of the vacuum cavity.

[0007] The vacuum cavity of the utility model comprises: a plurality of light-through holes are evenly distributed on the outer circumference of a hollow cylindrical cavity, a vertical light-through flange is symmetrically arranged in the center of the cylindrical cavity, and cavity screw holes are symmetrically arranged on the end surface of the cylindrical cavity.

[0008] The coil bracket of the utility model is composed of two completely identical bracket bodies facing each other, the cross-sectional shape of the bracket body is an I-shaped structure, a coil inlet and a coil outlet are processed on the upper end surface of the bracket body, an upper bracket screw hole is processed on the outer side surface of the upper end of the bracket body, a lower bracket hole is processed on the lower end surface of the bracket body, and a flange mounting hole is processed in the middle of the bracket body.

[0009] The coil outer cover of the utility model is formed by integrally processing a cylindrical cover body and a fixing plate, wherein a coil installation hole is processed in the middle, a cover body hole is processed in the upper part of the cylindrical cover body, and a fixing plate hole is processed on the fixing plate.

[0010] The horizontal light-transmitting flanges of the utility model are arranged in 8 groups, 10 groups or 12 groups.

[0011] Since the utility model adopts the method of processing the vertical light-through flange and the cylindrical cavity of the vacuum cavity in one piece, the stress concentration caused by welding is reduced. In order to ensure the mechanical properties, a light-through hole is directly processed in the horizontal direction of the cylindrical cavity and a welding groove is reserved, a positioning hole is provided for the welding of the horizontal light-through flange, and coil bracket installation holes are reserved on the upper and lower surfaces of the cylindrical cavity. The reverse Helmholtz coil is arranged on the coil bracket, and the reverse Helmholtz coil bracket is installed on the vacuum cavity by bolts, and a coil cover is arranged outside the reverse Helmholtz coil. The device has the advantages of light weight, small size, good mechanical properties, etc. Under the premise of equal energy consumption, it ensures light weight and small size while improving integration and interchangeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0013] Figure 2 yes Figure 1 Explosion diagram.

[0014] Figure 3 yes Figure 2 A schematic structural diagram of the medium vacuum chamber 4.

[0015] Figure 4 yes Figure 2 Schematic diagram of the structure of the middle coil support 1.

[0016] Figure 5 yes Figure 2 Schematic diagram of the structure of the middle coil outer cover 2.

[0017] In the figure: 1. Coil bracket; 2. Coil cover; 3. Reverse Helmholtz coil; 4. Vacuum cavity; 5. Horizontal light-transmitting flange; 1-1. Bracket body; 1-2. Coil inlet; 1-3. Coil outlet; 1-4. Upper bracket screw hole; 1-5. Lower bracket hole; 1-6. Flange mounting hole; 2-1. Cylindrical cover; 2-2. Fixing plate; 2-3. Fixing plate hole; 2-4. Coil mounting hole; 2-5. Cover body hole; 4-1. Vertical light-transmitting flange; 4-2. Cylindrical cavity; 4-3. Light-transmitting hole; 4-4. Cavity screw hole. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.

[0019] Example 1

[0020] exist Figures 1 to 5 In the space strontium optical clock vacuum cavity and the external reverse Helmholtz coil device involved in the utility model, coil brackets 1 are symmetrically installed at the upper and lower ends of the vacuum cavity 4. Specifically, the vacuum cavity 4 is composed of a cylindrical cavity 4-2 and a vertical light-through flange 4-1 connected as a whole. A plurality of light-through holes 4-3 are evenly distributed on the outer circumference of the hollow cylindrical cavity 4-2. A horizontal light-through flange 5 is welded on the light-through hole 4-3. The through hole processed in the center of the horizontal light-through flange 5 is connected to the inner cavity of the vacuum cavity 4. In this embodiment, 8 groups, 10 groups or 12 groups of horizontal light-through flanges 5 are arranged. A vertical light-transmitting flange 4-1 is symmetrically connected to the center of the cylindrical cavity 4-2, and a cavity screw hole 4-4 is symmetrically arranged on the end surface of the cylindrical cavity 4-2. The coil bracket 1 is composed of two identical bracket bodies 1-1 facing each other. The cross-sectional shape of the bracket body 1-1 is an I-shaped structure. A coil inlet 1-2 and a coil outlet 1-3 are processed on the upper end surface of the bracket body 1-1. An upper bracket screw hole 1-4 is processed on the outer side surface of the upper end of the bracket body 1-1, and a lower bracket hole 1-5 is processed on the lower end surface of the bracket body 1-1. A flange mounting hole 1-6 is processed in the middle of the bracket body, and the coil bracket 1 is mounted through the flange mounting hole 1-6. The coil support 1 is sleeved on the vertical light-transmitting flange 4-1. A reverse Helmholtz coil 3 is wound on the outer wall of the coil support 1. The reverse Helmholtz coil 3 is wound from the coil inlet 1-2, and is neatly wound in the middle of the I-shaped structure and then passes out from the coil outlet 1-3. A coil cover 2 is arranged outside the coil support 1 and the reverse Helmholtz coil 3. The coil cover 2 is composed of a cylindrical cover body 2-1 and a fixing plate 2-2. The cylindrical cover body 2-1 and the fixing plate 2-2 are integrally processed and a coil mounting hole 2-4 is processed in the middle. The coil cover 2 is sleeved on the outside of the coil support 1 through the coil mounting hole 2-4 and completely wraps the reverse Helmholtz coil 3 therein. A cover body hole 2-5 is processed on the upper part of the cylindrical cover body 2-1, and a fixing plate hole 2-3 is processed on the fixing plate 2-2. The cover body hole 2-5 corresponds to the upper bracket screw hole 1-4, and the coil support 1 and the coil cover 2 are fixedly connected by bolts arranged therein. The fixing plate holes 2 - 3 , the lower bracket holes 1 - 5 , and the cavity screw holes 4 - 4 correspond to each other, and the reverse Helmholtz coil 3 is fixed to the vacuum cavity 4 by bolts arranged therein.

Claims

1. A space strontium optical clock vacuum chamber and an external reverse Helmholtz coil device, characterized in that: Coil supports (1) are symmetrically arranged at the upper and lower ends of the vacuum cavity (4); a reverse Helmholtz coil (3) is wound on the outer wall of the coil support (1); a coil cover (2) is arranged outside the coil support (1) and the reverse Helmholtz coil (3); a plurality of groups of horizontal light-transmitting flanges (5) are horizontally arranged in the middle of the vacuum cavity (4); and a through hole processed in the center of the horizontal light-transmitting flange (5) is connected to the inner cavity of the vacuum cavity (4).

2. The space strontium optical clock vacuum chamber and external reverse Helmholtz coil device according to claim 1, characterized in that The vacuum cavity (4) comprises: a hollow cylindrical cavity (4-2) having a plurality of light-through holes (4-3) evenly distributed on the outer circumference thereof; a vertical light-through flange (4-1) symmetrically arranged at the center of the cylindrical cavity (4-2) and connected thereto; and cavity screw holes (4-4) symmetrically arranged at the end surface of the cylindrical cavity (4-2).

3. The space strontium optical clock vacuum chamber and the external reverse Helmholtz coil device according to claim 1, characterized in that The coil support (1) is composed of two completely identical support bodies (1-1) facing each other, the cross-section of the support body (1-1) is an I-shaped structure, the upper end surface of the support body (1-1) is processed with a coil inlet (1-2) and a coil outlet (1-3), the upper end outer surface of the support body (1-1) is processed with an upper support screw hole (1-4), the lower end surface of the support body (1-1) is processed with a lower support hole (1-5), and the middle part of the support body is processed with a flange mounting hole (1-6).

4. The space strontium optical clock vacuum chamber and external reverse Helmholtz coil device according to claim 1, characterized in that The coil outer cover (2) is formed by integrally processing a cylindrical cover body (2-1) and a fixing plate (2-2) and having a coil mounting hole (2-4) processed in the middle, a cover body hole (2-5) processed in the upper part of the cylindrical cover body (2-1), and a fixing plate hole (2-3) processed in the fixing plate (2-2).

5. The space strontium optical clock vacuum chamber and external reverse Helmholtz coil device according to claim 1, characterized in that: The horizontal light-transmitting flanges (5) are arranged in 8 groups, 10 groups or 12 groups.

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