阅读说明：本技术 一种serf原子磁强计的一体化表头装置 (Integrated gauge outfit device of SERF atomic magnetometer ) 是由 张宁 韩邦成 丁铭 陆吉玺 赵俊鹏 杨可 马丹跃 邢博铮 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种SERF原子磁强计的一体化表头装置,针对SERF磁强计表头气室所需光学激发检测和高温加热需求,对激发、检测、加热和隔热等关键部件进行一体化设计,通过可调反射镜结构将激发光与检测光平行入射来大幅缩减表头体积,并利用紧密配合结构固定碱金属气室周围部件,减小了SERF磁强计表头体积,提高了激发、检测装置调试效率,同时降低了加热装置与外界环境热传导。本发明将为小型化SERF磁强计阵列和SERF磁场测量研究提供高可靠性、高稳定性的表头装置。(The invention discloses an integrated gauge outfit device of an SERF atomic magnetometer, aiming at the requirements of optical excitation detection and high-temperature heating required by an SERF magnetometer gauge outfit air chamber, key components such as excitation, detection, heating, heat insulation and the like are integrally designed, the excitation light and the detection light are incident in parallel through an adjustable reflector structure to greatly reduce the gauge outfit volume, and components around an alkali metal air chamber are fixed by utilizing a close fit structure, so that the SERF magnetometer gauge outfit volume is reduced, the debugging efficiency of an excitation and detection device is improved, and the heat conduction of a heating device and the external environment is reduced. The invention provides a gauge head device with high reliability and high stability for the measurement research of a miniaturized SERF magnetometer array and an SERF magnetic field.)

1. The integrated meter head device of the SERF atomic magnetometer is characterized by comprising a reflector part (5), a base (6), a shell (4), a heat-insulating layer (3), an oven (2) and an air chamber (1), wherein the shell (4), the heat-insulating layer (3) and the oven (2) are sequentially nested from outside to inside, the shell (4) is fixedly connected with the base (6), through holes are formed in corresponding positions of two opposite surfaces of the shell (4), the heat-insulating layer (3) and the oven (2), an excitation light passage is formed by the through holes and the air chamber (1), heating films (7) are arranged on two surfaces of the oven (2) parallel to the excitation light passage, the through holes are formed in corresponding positions of the shell (4), the heating films (7), the heat-insulating layer (3) and the oven (2), and a detection light passage is formed by the through holes and the air chamber (1; the exciting light path is vertical to the detecting light path; the surface of the heating film (7) is provided with a temperature sensor (8), the inlets and outlets of the exciting light passage and the detecting light passage are provided with window sheets (9), and the oven (2), the heating film (7), the temperature sensor (8), the heat-insulating layer (3) and the window sheets (9) form a heating and heat-insulating structure;

the two reflector parts (5) are fixed on the shell (4) and are respectively positioned at two ends of the detection light path;

the gas in the gas chamber (1) is alkali metal gas, and the alkali metal gas works in a SERF state.

2. The SERF atomic magnetometer integrated meter head device according to claim 1, wherein the reflector portion (5) comprises a mirror frame fixing block (51), a reflector frame (52), an adjusting knob (53), a reflector (54) and a screw (55), the mirror frame fixing block (51) is fixed on the housing (4), the reflector frame (52) is located between the mirror frame fixing blocks (51), through holes which are perpendicular to each other are formed in the reflector frame (52), the reflector is fixed on the reflector frame (52) in a direction which is 45 degrees relative to a detection light path, and in actual use, the angle between the reflector and the detection light can be finely adjusted through the adjusting knob (53) and the screw (55) to ensure the collimation incidence of the detection light.

Each reflector bracket (51) is provided with two matched adjusting knobs (53), two-degree-of-freedom fine adjustment of the reflector can be realized, so that collimation of a detection light path is guaranteed, and the reflector bracket (52) is fixedly connected with the shell (4) through a bracket fixing block (51).

3. The SERF atomic magnetometer integrated gauge outfit apparatus according to claim 1, wherein the alkali metal gas is any one or two of potassium, rubidium, and cesium.

4. The SERF atomic magnetometer integrated gauge head device according to claim 1, wherein said heating films (7) are made of non-magnetic nichrome material and are twisted and symmetrical by PCB technology, and each of said heating films (7) is a double-layer opposite-attaching structure.

5. The SERF atomic magnetometer integrated gauge head device according to claim 1, wherein said oven (2) is made of boron nitride material.

6. The SERF atomic magnetometer integrated gauge outfit device according to claim 1, wherein said thermal insulation layer (3) is made of aerogel material.

7. The integrated meter head device of the SERF atomic magnetometer according to claim 1, wherein the window (9) is coated with an antireflection film material corresponding to alkali metal atoms.

8. The SERF atomic magnetometer integrated gauge outfit apparatus according to claim 1, wherein said housing (4) is made of polyetheretherketone material.

9. The SERF atomic magnetometer integrated gauge head device according to claim 1, wherein the reflecting mirror is a dielectric film reflecting mirror.

10. The SERF atomic magnetometer integrated gauge head device according to claim 1, wherein the entire gauge head device is made of a non-magnetic material.

Technical Field

The invention belongs to the field of atomic magnetometers, and particularly relates to an integrated gauge head device of a SERF (Spin-Exchange-Relaxation-Free) magnetometer.

Background

The ultra-high sensitive extremely-weak magnetic measurement device based on the SERF atomic spin effect has been realized to be superior to 0.1fT/Hz^1/2Forward towards aT (10)^-18T) magnitude development. The ultra-high sensitive ultra-weak magnetic measurement has huge application prospect in the fields of metering benchmark, brain science and medicine, material science and the like, but the polar magnetic field measurement device with the highest measurement sensitivity is still in the stage of experimental research platform at present, and the miniaturization SERF magnetometer is urgently needed to promote the rapid development of the device in the related fields. The SERF magnetometer gauge head device is the core of the SERF magnetometer and is also a key factor influencing the whole volume and the measurement index of the SERF magnetometer. In order to realize the SERF state of the alkali metal gas, a high-temperature nonmagnetic environment needs to be provided for the glass gas chamber bearing the alkali metal gas, and meanwhile, the judgment of the gas SERF state is realized by depending on laser excitation and detection technology. At present, the magnetic shielding material is limited by the processing technology and is difficult to miniaturize, so a magnetic shield with larger volume is often arranged outside a meter head device, and therefore, the meter head device needs to reduce the magnetic noise generated by the meter head device as much as possible under the condition of keeping high temperature. The SERF magnetometer gauge head comprises key device components such as an air chamber, an oven, a heating film, a heat insulation layer and a window piece, and the key device components are respectively and independently designed and installed by the traditional gauge head device, so that the structure of the gauge head device is complex and the size of the gauge head device is large, and the device components are not matched organically. For example, the SERF magnetometer is usually configured by using a light path layout in a manner that excitation light and detection light are incident perpendicularly, so that the excitation laser and the detection laser must be located at different directions of the SERF magnetometer and placed perpendicularly, which greatly limits further reduction of the volume of the SERF magnetometer and affects miniaturization application of the device.

Disclosure of Invention

The invention aims to solve the problems of large volume and loose structure of the conventional SERF magnetometer gauge head device, and provides an integrated gauge head device of an SERF magnetometer, which reduces the gauge head volume of the SERF magnetometer, shortens the optical paths of an excitation optical path and a detection optical path, enhances the matching degree and stability of various parts of the gauge head, and provides a compact and arrayed gauge head device for the miniaturization application of the SERF magnetometer.

The purpose of the invention is realized by the following technical scheme:

an integrated gauge outfit device of a SERF atomic magnetometer is characterized by comprising a reflector part, a base, a shell, a heat insulation layer, an oven and an air chamber which are sequentially nested from outside to inside, wherein the shell is fixedly connected with the base, through holes are formed in the corresponding positions of two opposite surfaces of the shell, the heat insulation layer and the oven, an excitation light passage is formed by the through holes and the air chamber, heating films are arranged on two surfaces of the oven parallel to the excitation light passage, through holes are formed in the corresponding positions of the shell, the heating films, the heat insulation layer and the oven, and a detection light passage is formed by the through holes and the air chamber; the exciting light path is vertical to the detecting light path; the surface of the heating film is provided with a temperature sensor, the inlets and the outlets of the exciting light passage and the detecting light passage are provided with window sheets, and the oven, the heating film, the temperature sensor, the heat-insulating layer and the window sheets form a heating and heat-insulating structure;

the two reflecting mirror parts are fixed on the shell and respectively positioned at two ends of the detection light path;

the gas in the gas chamber is alkali metal gas, and the alkali metal gas works in a SERF state.

Further, the speculum part includes mirror holder fixed block, speculum frame, adjust knob and speculum, screw rod, the mirror holder fixed block fix the shell on, the speculum frame is located the mirror holder fixed block between, set up mutually perpendicular's through-hole in the speculum frame, the speculum is fixed on the speculum frame with the direction that is 45 for detecting the optical path to accessible adjust knob and screw rod fine setting speculum and detection optical angle are in order to guarantee to detect the optical alignment and incide in the in-service use.

Each reflector bracket is provided with two matched adjusting knobs, so that two-degree-of-freedom fine adjustment of the reflector can be realized, the collimation of a detection light path is guaranteed, and the reflector bracket is fixedly connected with the shell through a bracket fixing block.

Further, the alkali metal gas is any one or two of potassium, rubidium and cesium.

Furthermore, the heating films are made of nonmagnetic nickel-chromium materials and are processed into a twisted and symmetrical structure through a PCB technology, and each heating film is of a double-layer opposite-pasting structure.

Furthermore, the oven is made of a boron nitride material.

Further, the heat insulation layer is made of aerogel materials.

Further, the window is coated with an antireflection film material corresponding to alkali metal atoms.

Further, the shell is made of polyether-ether-ketone materials.

Furthermore, the reflector adopts a dielectric film reflector.

Further, the entire gauge outfit is made of a non-magnetic material.

The invention has the following beneficial effects:

(1) the invention comprehensively considers the functions and working requirements of all devices, integrally designs the parts such as the air chamber, the oven, the heating film, the heat insulation layer, the shell and the like, and realizes the assembly of the integrated gauge outfit device through the close fit of all the parts.

(2) Through the adjustable reflector structure in the design gauge outfit device, high-efficient quick condition detects optical collimation, can realize the SERF magnetometer function simultaneously under the condition that detects laser instrument and arouse laser instrument parallel mount, can greatly reduce the SERF magnetometer volume.

(3) The heat-insulation anti-reflection window sheets are arranged at the two ends of the excitation light path and the detection light path, so that the transmittance of the excitation light and the detection light is ensured, and the heat dissipation of the meter head core to the outside can be reduced. In addition, a temperature sensor is arranged on the outer side of the heating film, so that the temperature change of the gauge outfit can be observed in real time.

(4) The invention has compact structure, low operation requirement and low requirement on SERF magnetometer accessories, and provides a stable low-noise high-temperature environment for maintaining the SERF state of the alkali metal gas.

Drawings

The invention is further explained below with reference to the figures and examples;

FIG. 1 is a front view of an integrated gauge head apparatus of a SERF atomic magnetometer of the present invention;

FIG. 2 is a cross-sectional view of section B-B of an integrated gauge head apparatus of a SERF atomic magnetometer of the present invention;

FIG. 3 is a partial cross-sectional view of section A-A of an integrated gauge head apparatus of a SERF atomic magnetometer of the present invention;

FIG. 4 is a structural view of a heating film of an integrated gauge head device of a SERF atomic magnetometer of the present invention;

in the figure, an air chamber 1, an oven 2, a heat insulation layer 3, a housing 4, a reflector part 5, a base 6, a heating film 7, a temperature sensor 8, a window piece 9, a mirror holder fixing block 51, a reflector holder 52, an adjusting knob 53, a reflector 54, a screw 55, a heating film substrate 71, a heating film through hole 72, a copper wire 73 and a power supply connector 74.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, and the objects and effects of the invention will become more apparent. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-3, the integrated meter head device of the SERF atomic magnetometer of the present invention comprises a reflector portion 5, a base 6, and a casing 4, a heat-insulating layer 3, an oven 2, and an air chamber 1 which are sequentially nested from outside to inside, wherein the casing 4 and the base 6 are fixedly connected, through holes are respectively formed at corresponding positions of two opposite surfaces of the casing 4, the heat-insulating layer 3, and the oven 2, and form an excitation light path with the air chamber 1, heating films 7 are arranged on two surfaces of the oven 2 parallel to the excitation light path, and the air chamber 1 and the heating films 10 are respectively fixed at the inside and outside of the oven 2 by high temperature glue, through holes are respectively formed at corresponding positions of the casing 4, the heating films 7, the heat-insulating layer 3, and the oven 2, and form a detection light path with the air chamber 1; the exciting light path is vertical to the detecting light path; the surface of the heating film 7 is provided with a temperature sensor 8, the inlets and outlets of the exciting light passage and the detecting light passage are provided with window sheets 9, and the oven 2, the heating film 7, the temperature sensor 8, the heat-insulating layer 3 and the window sheets 9 form a heating and heat-insulating structure;

two reflector parts 5 are fixed on the shell 4 and respectively positioned at two ends of the detection light path;

the gas in the gas chamber 1 is alkali metal gas, which can be one of potassium, rubidium and cesium, and the alkali metal gas is kept to work in a SERF state through a gauge outfit heating structure and an external magnetic shielding system.

The reflector part 5 comprises a frame fixing block 51, a reflector frame 52, an adjusting knob 53, a reflector 54 and a screw 55, wherein the frame fixing block 51 is fixed on the shell 4, the reflector frame 52 is positioned between the frame fixing blocks 51, through holes which are perpendicular to each other are arranged in the reflector frame 52, the reflector 54 adopts a dielectric film reflector, the reflector 54 is fixed on the reflector frame 52 in a direction which is 45 degrees relative to a detection light path, and the reflector and the detection light angle can be finely adjusted through the adjusting knob 53 and the screw 55 in actual use so as to ensure the collimation and incidence of the detection light.

Each reflector bracket 51 is provided with two matched adjusting knobs 53, two-degree-of-freedom fine adjustment of reflector lenses can be realized, so that collimation of a detection light path is guaranteed, and the reflector bracket 52 is fixedly connected with the shell 4 through a bracket fixing block 51 and screws.

The heating film 7 is made of nonmagnetic nickel-chromium materials, is processed into a twisted pair and symmetrical structure by a PCB technology, and eliminates magnetic field noise caused by electric heating as much as possible by attaching the heating film in a double-layer manner. As shown in fig. 4, the heating film 7 is composed of a heating film substrate 71 and a copper wire 73, a heating film through hole 72 is dug in the center of the heating film substrate 71, the copper wire 73 is routed in a twisted pair form, and the copper wire is connected to a power supply connector 74.

The temperature sensor 8 is attached to the outer side of the heating film 7, and the wiring of the temperature sensor is connected to an electric interface of the base 6 together with a heating film power supply line, so that the core temperature of the gauge outfit is detected and controlled in real time. The oven 2 is made of boron nitride material, and provides a high-temperature environment required by a SERF state for the alkali metal gas in the gas chamber 1 together with the heating film 7. Insulating layer 3 adopts aerogel material to carry out heating device's thermal-insulated, reduces the inside heat dissipation of gauge outfit and prevents that speculum and measured object high temperature, can paste 2-3 layers of aerogel according to the air chamber temperature requirement for guaranteeing thermal-insulated effect.

The window 9 is coated with an antireflection film material corresponding to alkali metal atoms to isolate heat dissipation from the outside environment of the gauge head. The entire header assembly is secured by screws 12 and the header assembly is arranged in an array according to this manner.

The shell 4 is made of PEEK material and is fixed with other SERF magnetometer matching devices through screws 12.

The whole meter head device is made of non-magnetic materials.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and although the invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that various changes in the form and details of the embodiments may be made and equivalents may be substituted for elements thereof. All modifications, equivalents and the like which come within the spirit and principle of the invention are intended to be included within the scope of the invention.