A thermal insulation oven structure for single-beam SERF atomic magnetometer

Abstract

A thermal insulation oven structure for a single-beam SERF atomic magnetometer can achieve rapid and uniform heating of the alkali metal gas chamber while preventing heat from being transferred outward, thereby achieving good thermal insulation effects. It is characterized in that it includes a gas chamber bracket and a bracket cover plate that are combined to form an oven box structure. The cavity bottom surface of the oven box structure is covered with a ceramic heating structure to form a cavity for accommodating the alkali metal gas chamber. A heating film is attached to the upper surface of the ceramic heating structure. The ceramic heating structure is provided with a groove for placing a temperature measuring platinum resistor. The gas chamber bracket and the bracket cover plate are both made of polyetheretherketone (PEEK).

Description

Technical Field

[0001] The invention relates to the technical field of gas chamber heating of a SERF atomic magnetometer experimental device, in particular to a heat-insulating oven structure for a single-beam SERF atomic magnetometer. Background Art

[0002] With the rapid development of quantum precision measurement technology, atomic magnetometers, which utilize atomic spin effects to measure magnetic fields, have shown significant advantages in the field of magnetic field measurement. Atomic magnetometers based on the spin-exchange relaxation-free (SERF) effect can achieve magnetic field measurement sensitivities on the order of aT. Single-beam SERF atomic magnetometers, among others, have attracted widespread attention due to their simple structure and ease of miniaturization and integration.

[0003] The oven, a crucial component of the SERF atomic magnetometer, is primarily used to uniformly heat the alkali metal gas chamber within it. Whether the oven heats the alkali metal gas chamber quickly and evenly, and whether the oven's structure provides adequate insulation and heat preservation, all influence the sensitivity of the SERF atomic magnetometer.

[0004] Currently, commonly used heating oven structures are mostly designed for dual-beam SERF atomic magnetometers. Light holes are provided on the front, rear, left, and right sides of the ceramic heating structure. Through holes for the gas chamber handle are provided on the top surface of the ceramic heating structure, and a heating film is directly attached to the outer surface of the ceramic heating structure. After the gas chamber is placed, the ceramic heating structure is placed into a support structure made of polyetheretherketone (PEEK) inside the atomic magnetometer. However, these disadvantages include: 1. The entire oven must be removed to replace the gas chamber; 2. The heating film is attached to the outer surface of the ceramic heating structure for heating, and there is no thermal insulation provided outside the ceramic heating structure, which easily dissipates heat from the ceramic heating structure, reducing heating efficiency; 3. The ceramic heating structure is in direct contact with the PEEK support structure, which easily conducts heat through the support structure to other internal components of the magnetometer, causing temperature increases in areas outside the oven, which can affect components such as the optical prism, photodetector, and fiber collimator within the magnetometer. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and propose a thermal insulation oven structure for a single-beam SERF atomic magnetometer, which can achieve rapid and uniform heating of the alkali metal gas chamber while preventing heat from being transferred outward, thereby achieving good thermal insulation effects.

[0006] The technical solutions of the present invention are as follows:

[0007] A thermal insulation oven structure for a single-beam SERF atomic magnetometer, characterized in that it includes an air chamber bracket and a bracket cover plate that are combined to form an oven box structure. The cavity bottom surface of the oven box structure is covered with a ceramic heating structure to form a cavity for accommodating an alkali metal air chamber. A heating film is attached to the upper surface of the ceramic heating structure. The ceramic heating structure is provided with a groove for placing a temperature measuring platinum resistor. The gas chamber bracket and the bracket cover plate are both made of polyetheretherketone (PEEK).

[0008] The air chamber bracket has an upper opening and a front opening, a rear groove of the air chamber bracket is provided on the outer surface of the rear wall of the air chamber bracket, a left light hole of the air chamber bracket and a right light hole of the air chamber bracket are provided on the left wall and the right wall respectively, and a left rear supporting structure of the air chamber bracket, a left front supporting structure of the air chamber bracket, a right front supporting structure of the air chamber bracket and a right rear supporting structure of the air chamber bracket are provided on the bottom surface of the air chamber bracket, the bracket cover includes a top plate, an intermediate plug plate extending downward from the rear side of the top plate, and a left plug leg and a right plug leg extending downward from the front side of the top plate respectively, the intermediate plug plate is inserted into the rear groove of the air chamber bracket, the left plug leg abuts against the front side of the left wall of the air chamber bracket, and the right plug leg abuts against the front side of the right wall of the air chamber bracket.

[0009] A left light-through hole of the ceramic heating structure is provided on the left wall of the ceramic heating structure, and a right light-through hole of the ceramic heating structure is provided on the right wall of the ceramic heating structure.

[0010] A square groove is provided on the upper surface of the bottom of the gas chamber bracket, which is used to determine the position of the alkali metal gas chamber and place the alkali metal gas chamber.

[0011] The rear portion of the ceramic heating structure is an arch bridge structure. Semicircular light holes are provided on the left and right sides of the ceramic heating structure, corresponding to the upper semicircular parts of the circular light holes on the left and right sides of the air chamber bracket.

[0012] The ceramic heating structure is made of boron nitride, aluminum nitride or aluminum oxide.

[0013] The alkali metal gas chamber is made of high borosilicate glass or quartz glass.

[0014] The heating film adopts a wiring structure of pure copper wire on a polyimide material film.

[0015] The bottom of the air chamber bracket is provided with a circular hole.

[0016] The technical effects of the present invention are as follows: Compared with the existing oven structure, the present invention provides a thermal insulation oven structure for a single-beam SERF atomic magnetometer, which is simpler and more reliable, can achieve rapid and uniform heating of the alkali metal gas chamber, and has good thermal insulation effect, which is beneficial to the experimental research of the single-beam SERF atomic magnetometer.

[0017] The advantages of the present invention compared with the prior art are:

[0018] (1) The ceramic heating structure is made of high thermal conductivity boron nitride, aluminum nitride or aluminum oxide materials, and is in direct contact with the alkali metal gas chamber. The contact area with the alkali metal gas chamber is large, the heat transfer efficiency is high, and the alkali metal gas chamber can be heated quickly and evenly.

[0019] (2) The alkali metal gas chamber is made of high borosilicate glass or quartz glass. The ceramic heating structure is in direct contact only with the alkali metal gas chamber and the air. The thermal conductivity of the air and the alkali metal gas chamber is low. The heat of the ceramic heating structure is not easily dissipated outward, and it has a good thermal insulation effect, which helps to improve the heating efficiency and achieve rapid and uniform heating of the alkali metal gas chamber.

[0020] (3) The air chamber bracket and the bracket cover are combined to form the oven box structure, which is made of polyetheretherketone (PEEK) material with low thermal conductivity. It can slow down the air flow around the ceramic heating structure, effectively reduce heat convection, and reduce the heat loss from the ceramic heating structure to the outside, thus achieving good thermal insulation effect.

[0021] (4) The oven structure proposed in the present invention has good thermal insulation effect, which helps to avoid the temperature rise of non-oven positions inside the atomic magnetometer caused by heating of the ceramic heating structure, and avoids high temperature affecting the optical prisms, photodetectors, fiber collimators and other components inside the atomic magnetometer.

[0022] (5) The four supporting structures at the bottom of the air chamber bracket make the oven more stable. The overall structure of the oven is simple, reliable and easy to install.

[0023] (6) The design of the bracket cover makes it possible to replace the gas chamber without removing the oven as a whole, making it easy to replace the alkali metal gas chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic overall diagram of a heat-insulating oven structure for a single-beam SERF atomic magnetometer.

[0025] Figure 2 yes Figure 1 Overall cross-sectional view.

[0026] Figure 3 yes Figure 1 The overall exploded diagram.

[0027] Figure 4 yes Figure 1 Schematic diagram of the air chamber bracket.

[0028] Figure 5 yes Figure 1Schematic diagram of the bracket cover in .

[0029] Figure 6 yes Figure 1 Schematic diagram of the ceramic heating structure.

[0030] The description of the accompanying figures is as follows: 1-air chamber bracket; 2-bracket cover (including a top plate, a middle plug plate extending downward from the rear side of the top plate, and a left plug leg and a right plug leg extending downward from the front side of the top plate respectively); 3-alkali metal air chamber; 4-ceramic heating structure; 5-temperature measuring platinum resistor; 6-heating film; 7-air chamber bracket left rear side supporting structure; 8-air chamber bracket left front side supporting structure; 9-air chamber bracket left side light hole; 10-ceramic heating structure left side light hole; 11-ceramic heating structure front groove; 12-air chamber bracket right side light hole; 13-ceramic heating structure right side light hole; 14-air chamber bracket right front side supporting structure; 15-air chamber bracket rear side groove. DETAILED DESCRIPTION

[0031] Below is the attached figure ( Figures 1-6 ) and Examples illustrate the present invention.

[0032] Figure 1 The present invention is a schematic overall diagram of a heat-insulating oven structure for a single-beam SERF atomic magnetometer. Figure 2 yes Figure 1 Overall cross-sectional view. Figure 3 yes Figure 1 The overall exploded diagram. Figure 4 yes Figure 1 Schematic diagram of the air chamber bracket. Figure 5 yes Figure 1 Schematic diagram of the bracket cover in . Figure 6 yes Figure 1 Schematic diagram of ceramic heating structure in . Figures 1 to 6As shown, a thermal insulation oven structure for a single-beam SERF atomic magnetometer includes an air chamber bracket 1 and a bracket cover 2 that are combined to form an oven box structure. The bottom surface of the chamber of the oven box structure is covered with a ceramic heating structure 4 to form a cavity for accommodating an alkali metal air chamber 3. A heating film 6 is attached to the upper surface of the ceramic heating structure 4. A groove for placing a temperature measuring platinum resistor 5 is provided on the ceramic heating structure 4 (for example, a groove 11 in the front of the ceramic heating structure). The materials of the air chamber bracket 1 and the bracket cover 2 are both polyetheretherketone (PEEK). The air chamber bracket 1 has an upper opening and a front opening, and an air chamber bracket rear side groove 15 is provided on the outer surface of the rear wall of the air chamber bracket 1, and the air chamber bracket left side light hole 9 and the air chamber bracket right side light hole 12 are respectively provided on the left wall and the right wall of the air chamber bracket 1, and the air chamber bracket left rear side support structure 7, the air chamber bracket left front side support structure 8, the air chamber bracket right front side support structure 14, and the air chamber bracket right rear side support structure are provided on the bottom surface of the air chamber bracket 1, and the bracket cover 2 includes a top plate, an intermediate plug plate extending downward from the rear side of the top plate, and a left plug leg and a right plug leg extending downward from the front side of the top plate respectively, and the intermediate plug plate is inserted into the air chamber bracket rear side groove 15, the left plug leg abuts against the front side of the left wall of the air chamber bracket 1, and the right plug leg abuts against the front side of the right wall of the air chamber bracket 1.

[0033] The left wall of the ceramic heating structure 4 is provided with a light-through hole 10 on the left side of the ceramic heating structure, and the right wall of the ceramic heating structure 4 is provided with a light-through hole 13 on the right side of the ceramic heating structure. The upper surface of the bottom of the air chamber bracket 1 is provided with a square groove, which is used to determine the position of the alkali metal gas chamber 3 and place the alkali metal gas chamber 3. The rear part of the ceramic heating structure 4 is an arch bridge structure, and the left and right sides of the ceramic heating structure 4 are provided with semicircular light-through holes, corresponding to the upper semicircular parts of the circular light-through holes on the left and right sides of the air chamber bracket 1. The ceramic heating structure 4 is made of boron nitride, aluminum nitride or aluminum oxide. The alkali metal gas chamber 3 is made of high borosilicate glass or quartz glass. The heating film 6 adopts a wiring structure of pure copper wire on a polyimide material film. The bottom of the air chamber bracket 1 has a circular hole.

[0034] A thermally insulating oven structure for a single-beam SERF atomic magnetometer comprises a chamber support, a support cover, an alkali metal chamber, a ceramic heating structure, a heating film, and a platinum resistor for temperature measurement. The support cover is combined with the chamber support to form an oven housing, within which the alkali metal chamber and the ceramic heating structure are placed. Compared to existing oven structures, the oven structure designed in the present invention is simpler and more reliable, capable of rapidly and uniformly heating the alkali metal chamber while providing excellent thermal insulation, facilitating experimental research using single-beam SERF atomic magnetometers.

[0035] A thermal insulation oven structure for a single-beam SERF atomic magnetometer, comprising a gas chamber support 1, a support cover 2, an alkali metal gas chamber 3, a ceramic heating structure 4, a platinum resistor 5 for temperature measurement, and a heating film 6. The support cover 2 is combined with the gas chamber support 1 to form an oven box structure, wherein the alkali metal gas chamber 3 and the ceramic heating structure 4 are placed inside the oven box structure. The gas chamber support 1 has an open top surface, and the alkali metal gas chamber 3 is placed in the gas chamber support 1 through the top surface opening. The ceramic heating structure 4 is placed above the alkali metal gas chamber 3, and the heating film 6 is attached to the upper surface of the ceramic heating structure 4. A rectangular groove 11 is provided in the front of the ceramic heating structure 4 for accommodating the platinum resistor 5 for temperature measurement. The support cover 2 is located above the ceramic heating structure 4.

[0036] The air chamber bracket 1 has a light hole 9 on the left, a light hole 12 on the right, and a rectangular groove 15 on the rear side, which is used to be combined with the bracket cover 2 to form an oven box structure. The air chamber bracket 1 has a square groove on the upper surface of the bottom, which is used to determine the position of the alkali metal gas chamber 3 and place the alkali metal gas chamber 3. The bottom has a circular hole and four supporting structures on the outside of the bottom, namely the right rear support structure, the right front support structure 14, the left front support structure 8, and the left rear support structure 7.

[0037] The bracket cover 2 is combined with the gas chamber bracket 1 to form the oven housing structure. A rectangular notch is formed on the front of the oven housing structure to accommodate the gas handle of the alkali metal gas chamber 3, the ceramic heating structure 4, the platinum resistor 5 for temperature measurement, and the heating film 6. The gas chamber bracket 1 and bracket cover 2 are both manufactured from polyetheretherketone (PEEK).

[0038] The rear portion of the ceramic heating structure 4 is an arched bridge structure with a semicircular light-through hole 10 on the left and a semicircular light-through hole 13 on the right, corresponding to the upper semicircular portions of the circular light-through holes on the left and right sides of the air chamber support 1. A heating film 6 is attached to the upper surface of the ceramic heating structure 4, and a rectangular groove 11 is provided at the upper front portion for accommodating the platinum resistor 5 for temperature measurement. The ceramic heating structure 4 is manufactured from boron nitride, aluminum nitride, or aluminum oxide.

[0039] The alkali metal gas chamber 3 is made of high borosilicate glass or quartz glass, and the heating film 6 is made of pure copper wire and polyimide material.

[0040] The present invention relates to a thermal insulation oven structure for a single-beam SERF atomic magnetometer. The oven structure can achieve rapid and uniform heating of an alkali metal gas chamber, has good thermal insulation effects, is simple and reliable in structure, has good stability, and is easy to replace and install the alkali metal gas chamber.

[0041] like Figure 1As shown, a thermal insulation oven structure for a single-beam SERF atomic magnetometer comprises a chamber support 1, a support cover 2, an alkali metal chamber 3, a ceramic heating structure 4, a platinum resistor 5 for temperature measurement, and a heating film 6. The support cover 2 is combined with the chamber support 1 to form an oven housing structure, within which the alkali metal chamber 3 and the ceramic heating structure 4 are placed. The chamber support 1 has an open top, into which the alkali metal chamber 3 is embedded. The ceramic heating structure 4 is placed above the alkali metal chamber 3, with the heating film 6 attached to its top surface. A rectangular groove 11 is formed in the front of the ceramic heating structure 4 for accommodating the platinum resistor 5 for temperature measurement. The support cover 2 is located above the ceramic heating structure 4. The chamber support has circular apertures on both sides and a circular hole on the bottom.

[0042] The structure of the air chamber support 1 is as follows Figure 4 As shown, the gas chamber bracket 1 has a left light hole 9 and a right light hole 12, which are used to pump and detect atoms in the alkali metal gas chamber 3. The gas chamber bracket 1 has a rectangular groove 15 on the rear side, which is used to form an oven box structure in combination with the bracket cover 2. The upper surface of the bottom of the gas chamber bracket 1 has a square groove, which is used to determine the position of the alkali metal gas chamber 3 and place the alkali metal gas chamber 3. The gas chamber bracket 1 has a circular hole at the center of the bottom, and square supporting structures at the four outer corners of the bottom, namely the right rear support structure, the right front support structure 14, the left front support structure 8, and the left rear support structure 7, which are used to stabilize the oven structure and play a good supporting role.

[0043] The structure of the support cover 2 is as follows Figure 5 As shown, the support cover 2 and the air chamber support 1 form the oven housing structure, slowing air flow around the ceramic heating structure 4 and reducing heat convection, thereby achieving excellent thermal insulation. A rectangular notch is formed on the front of the oven housing structure to accommodate the gas handle of the alkali metal air chamber 3, the ceramic heating structure 4, the platinum resistance 5 for temperature measurement, and the heating film 6. The air chamber support 1 and support cover 2 are both manufactured from low-thermal-conductivity polyetheretherketone (PEEK) material, which reduces heat transfer and achieves excellent thermal insulation.

[0044] The ceramic heating structure 4 is as follows Figure 6As shown, the ceramic heating structure 4 is made of boron nitride, aluminum nitride or aluminum oxide with high thermal conductivity, which can realize rapid heating of the alkali metal gas chamber 3. The ceramic heating structure 4 has a semicircular light-through hole 10 on the left and a semicircular light-through hole 13 on the right, which respectively correspond to the upper semicircular parts of the circular light-through holes on the left and right sides of the gas chamber bracket 1, so that the atoms in the alkali metal gas chamber 3 can be pumped and detected. The upper surface of the ceramic heating structure 4 is attached with a heating film 6 for heating the ceramic heating structure 4 and then heating the alkali metal gas chamber 3. A rectangular The shaped groove 11 is used to place the platinum resistor 5 for temperature measurement, which is used to accurately measure the temperature of the ceramic heating structure 4 that heats the alkali metal gas chamber 3 and indirectly measure the temperature of the alkali metal gas chamber 3 when it is heated. The rear part of the ceramic heating structure 4 is an arch bridge structure, which is used to be tightly combined with the alkali metal gas chamber 3 and directly contact the alkali metal gas chamber 3, thereby increasing the contact area with the alkali metal gas chamber 3 and ensuring the heating efficiency of the ceramic heating structure 4 on the alkali metal gas chamber 3. The ceramic heating structure 4 is only in direct contact with the alkali metal gas chamber 3 and the air. The heat of the ceramic heating structure 4 is not easily dissipated outward, and has a good thermal insulation effect.

[0045] The alkali metal gas chamber 3 is made of high borosilicate glass or quartz glass, and the heating film 6 is made of pure copper wire and polyimide material.

[0046] Any content not described in detail in this specification is prior art known to those skilled in the art. It should be noted that the above description is intended to help those skilled in the art understand the present invention, but does not limit the scope of protection of the present invention. Any equivalent substitution, modification, improvement, and / or simplification of the above description that does not depart from the essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A thermal insulation oven structure for a single-beam SERF atomic magnetometer, characterized in that: The oven box structure comprises an air chamber bracket and a bracket cover plate, the bottom surface of the cavity of the oven box structure is covered with a ceramic heating structure to form a cavity for accommodating the alkali metal air chamber, the upper surface of the ceramic heating structure is affixed with a heating film, and the ceramic heating structure is provided with a groove for accommodating a temperature measuring platinum resistor. The air chamber bracket and the bracket cover plate are made of polyetheretherketone (PEEK). The air chamber bracket has an upper opening and a front opening, a rear groove of the air chamber bracket is provided on the outer surface of the rear wall of the air chamber bracket, a left light hole of the air chamber bracket and a right light hole of the air chamber bracket are respectively provided on the left wall and the right wall of the air chamber bracket, a left rear supporting structure of the air chamber bracket, a left front supporting structure of the air chamber bracket, a right front supporting structure of the air chamber bracket and a right rear supporting structure of the air chamber bracket are provided on the bottom surface of the air chamber bracket, the bracket cover plate includes a top plate, an intermediate plug plate extending downward from the rear side of the top plate, and a left plug leg and a right plug leg extending downward from the front side of the top plate, respectively, the intermediate plug plate is inserted into the rear groove of the air chamber bracket, the left plug leg abuts against the front side surface of the left wall of the air chamber bracket, and the right plug leg abuts against the front side surface of the right wall of the air chamber bracket; A left light hole for the ceramic heating structure is provided on the left wall of the ceramic heating structure, and a right light hole for the ceramic heating structure is provided on the right wall of the ceramic heating structure; The upper surface of the bottom of the gas chamber bracket is provided with a square groove for determining the position of the alkali metal gas chamber and placing the alkali metal gas chamber; The rear part of the ceramic heating structure is an arch bridge structure, and semicircular light holes are provided on the left and right sides of the ceramic heating structure, corresponding to the upper semicircular parts of the circular light holes on the left and right sides of the air chamber bracket; The alkali metal gas chamber is made of high borosilicate glass or quartz glass; The bottom of the air chamber bracket is provided with a circular hole.

2. The heat-insulating oven structure for a single-beam SERF atomic magnetometer according to claim 1, characterized in that: The ceramic heating structure is made of boron nitride, aluminum nitride or aluminum oxide.

3. The heat-insulating oven structure for a single-beam SERF atomic magnetometer according to claim 1, characterized in that: The heating film adopts a wiring structure of pure copper wire on a polyimide material film.

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