CN110646752A - An integrated head device of SERF atomic magnetometer - Google Patents
An integrated head device of SERF atomic magnetometer Download PDFInfo
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052792 caesium Inorganic materials 0.000 claims description 3
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
Description
技术领域technical field
本发明属于原子磁强计领域,具体涉及一种SERF(Spin-Exchange-Relaxation-Free,无自旋交换弛豫)磁强计的一体化表头装置。The invention belongs to the field of atomic magnetometers, in particular to an integrated head device of a SERF (Spin-Exchange-Relaxation-Free, no spin exchange relaxation) magnetometer.
背景技术Background technique
基于SERF原子自旋效应的超高灵敏极弱磁测量装置,目前已实现优于0.1fT/Hz1/2的磁场测量灵敏度,正朝着aT(10-18T)量级发展。超高灵敏极弱磁测量在计量基准、脑科学与医学、材料科学等领域有巨大的应用前景,而目前测量灵敏度最高的极磁场测量装置仍处于实验研究平台阶段,急需小型化的SERF磁强计来推动其在相关领域的快速发展。SERF磁强计表头装置是SERF磁强计的核心,也是影响其整体体积和测量指标的关键因素。为了实现碱金属气体的SERF状态,需要为承载碱金属气体的玻璃气室提供高温无磁环境,同时气体SERF状态的判断依赖于激光激发和检测技术实现。目前磁屏蔽材料受限于加工工艺难以小型化,因此常将较大体积的磁屏蔽放于表头装置之外,因此表头装置在保持高温的条件下还需尽可能地降低自身产生的磁噪声。SERF磁强计表头包括气室、烤箱、加热膜、隔热层和窗片等关键器部件,传统的表头装置将这些关键器部件分别独立设计、安装,导致表头装置的结构复杂且体积较大,器部件之间欠缺有机配合。如SERF磁强计常采用激发光和检测光垂直入射的方式进行光路布局,导致激发激光器和检测激光器必须位于SERF磁强计的不同方位且垂直放置,这极大地限制了SERF磁强计体积的进一步缩小,影响了装置的小型化应用。The ultra-sensitive extremely weak magnetic measurement device based on the SERF atomic spin effect has achieved a magnetic field measurement sensitivity better than 0.1fT/Hz 1/2 , and is developing towards the aT (10 -18 T) level. Ultra-high sensitivity and extremely weak magnetic measurement has great application prospects in the fields of measurement benchmarks, brain science and medicine, and material science. At present, the most sensitive polar magnetic field measurement device is still in the stage of experimental research platform, and a miniaturized SERF magnetic field is urgently needed. to promote its rapid development in related fields. The SERF magnetometer head device is the core of the SERF magnetometer, and it is also a key factor affecting its overall volume and measurement indicators. In order to realize the SERF state of the alkali metal gas, it is necessary to provide a high-temperature non-magnetic environment for the glass gas cell carrying the alkali metal gas. At the same time, the judgment of the gas SERF state depends on the laser excitation and detection technology. At present, the magnetic shielding material is difficult to miniaturize due to the limitation of the processing technology. Therefore, the larger volume of the magnetic shield is often placed outside the meter device. Therefore, the meter device needs to reduce the magnetic field generated by itself as much as possible under the condition of maintaining high temperature. noise. The SERF magnetometer head includes key components such as air chamber, oven, heating film, heat insulation layer and window. The traditional head device designs and installs these key components independently, resulting in a complex structure of the head device. The volume is large, and there is a lack of organic cooperation between the device components. For example, SERF magnetometers often use the excitation light and detection light to be perpendicular to the optical path layout, resulting in the excitation laser and detection laser must be located in different directions of the SERF magnetometer and placed vertically, which greatly limits the volume of the SERF magnetometer. Further reduction affects the miniaturization application of the device.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于针对现有的SERF磁强计表头装置体积大、结构松散的问题,提出一种SERF磁强计一体化表头装置,减小SERF磁强计表头体积,缩减激发光路和检测光路光程,增强表头各器部件配合度和稳定性,为SERF磁强计小型化应用提供紧凑可阵列的表头装置。The purpose of the present invention is to solve the problems of large volume and loose structure of the existing SERF magnetometer head device, and propose an integrated SERF magnetometer head device, which reduces the volume of the SERF magnetometer head and reduces the excitation light path. And detection optical path optical path, enhance the degree of coordination and stability of the components of the meter head, and provide a compact and arrayable meter head device for the miniaturization of SERF magnetometer applications.
本发明的目的通过如下技术方案来实现:The object of the present invention is achieved through the following technical solutions:
一种SERF原子磁强计的一体化表头装置,其特征在于,该装置包括反射镜部分、底座以及从外到内依次嵌套的外壳、隔热层、烤箱、气室,所述的外壳和底座固定连接,所述的外壳、隔热层、烤箱的其中两个相对面的相对应位置均开设通孔,与所述的气室组成激发光通路,所述的烤箱与激发光通路平行的两个面上设置加热膜,所述的外壳、加热膜、隔热层、烤箱的相对应位置均开设通孔,与所述的气室组成检测光通路;所述的激发光通路和检测光通路垂直;所述的加热膜的表面设置温度传感器,所述的激发光通路和检测光通路的入口和出口处设置窗片,所述的烤箱、加热膜、温度传感器、隔热层、窗片组成加热和隔热结构;An integrated head device of a SERF atomic magnetometer is characterized in that, the device comprises a reflector part, a base and a shell, a heat insulation layer, an oven and an air chamber which are nested in sequence from the outside to the inside. It is fixedly connected with the base, and the corresponding positions of the two opposite surfaces of the outer shell, the heat insulating layer and the oven are provided with through holes, which form an excitation light path with the air chamber, and the oven is parallel to the excitation light path. A heating film is set on the two sides of the outer casing, the corresponding positions of the outer shell, the heating film, the heat insulation layer and the oven are provided with through holes, which form a detection light path with the air chamber; the excitation light path and the detection The light path is vertical; the surface of the heating film is provided with a temperature sensor, the entrance and exit of the excitation light path and the detection light path are provided with windows, the oven, the heating film, the temperature sensor, the heat insulation layer, the window Sheets form a heating and thermal insulation structure;
所述的反射镜部分为两个,均固定在所述的外壳上,且分别位于所述的检测光通路的两端;There are two mirror parts, both of which are fixed on the casing, and are respectively located at both ends of the detection light path;
所述的气室中的气体为碱金属气体,且所述的碱金属气体工作于SERF状态。The gas in the gas chamber is an alkali metal gas, and the alkali metal gas works in a SERF state.
进一步地,反射镜部分包括镜架固定块、反射镜架、调节旋钮和反射镜、螺杆,所述的镜架固定块固定在所述的外壳上,反射镜架位于所述的镜架固定块之间,反射镜架内开设相互垂直的通孔,反射镜以相对于检测光通路呈45°的方向固定在反射镜架上,并在实际使用中可通过调节旋钮和螺杆微调反射镜与检测光角度以保证检测光准直入射。Further, the mirror part includes a mirror frame fixing block, a mirror frame, an adjustment knob, a mirror, and a screw rod, the mirror frame fixing block is fixed on the outer shell, and the mirror frame is located on the mirror frame fixing block. In between, there are mutually perpendicular through holes in the mirror frame, the mirror is fixed on the mirror frame at a direction of 45° relative to the detection light path, and in actual use, the mirror and the detection can be fine-tuned by adjusting the knob and the screw light angle to ensure that the detection light is collimated.
每个反射镜架配有两个配合调节旋钮,可实现反射镜片两自由度微调从而保证检测光路的准直,反射镜架通过镜架固定块与外壳固连。Each mirror frame is equipped with two matching adjustment knobs, which can realize the fine adjustment of the two degrees of freedom of the mirror to ensure the collimation of the detection light path.
进一步地,所述的碱金属气体为钾、铷、铯其中的任意一种或两种。Further, the alkali metal gas is any one or both of potassium, rubidium and cesium.
进一步地,所述的加热膜采用无磁镍铬材料并通过PCB技术加工双绞和对称结构,且每个所述的加热膜均为双层对贴结构。Further, the heating film is made of non-magnetic nickel-chromium material and has a twisted pair and a symmetrical structure processed by PCB technology, and each of the heating films is a double-layer paired structure.
进一步地,所述的烤箱采用氮化硼材料制成。Further, the oven is made of boron nitride material.
进一步地,所述的隔热层采用气凝胶材料制成。Further, the heat insulating layer is made of aerogel material.
进一步地,窗片采用碱金属原子对应的增透膜材料进行镀膜处理。Further, the windows are coated with anti-reflection coating materials corresponding to alkali metal atoms.
进一步地,所述的外壳采用聚醚醚酮材料制成。Further, the shell is made of polyether ether ketone material.
进一步地,所述的反射镜采用介质膜反射镜。Further, the reflector adopts a dielectric film reflector.
进一步地,整个表头装置均由无磁材料制成。Further, the entire watch head device is made of non-magnetic material.
本发明的有益效果如下:The beneficial effects of the present invention are as follows:
(1)本发明综合考虑各器件的功能和工作需求,对气室、烤箱、加热膜、隔热层、外壳等器部件进行一体化设计,通过各器部件的紧密配合实现一体化表头装置的装配。(1) The present invention comprehensively considers the functions and working requirements of each device, and integrates the design of the air chamber, oven, heating film, heat insulation layer, shell and other device components, and realizes the integrated head device through the close cooperation of each device component. assembly.
(2)通过设计表头装置中的可调节反射镜结构,高效快速的条件检测光准直,同时可在检测激光器与激发激光器平行安装的情况下实现SERF磁强计功能,可极大地缩减了SERF磁强计体积。(2) By designing the adjustable mirror structure in the header device, the conditional detection light can be collimated efficiently and quickly, and the SERF magnetometer function can be realized when the detection laser and the excitation laser are installed in parallel, which can greatly reduce the cost of SERF magnetometer volume.
(3)本发明在激发光路和检测光路两端安装有隔热增透窗片,在保证对激发光和检测光的透过率的同时,能够减少表头核心对外界的热量耗散。除此之外,在加热膜外侧安装温度传感器可实时观测表头温度变化。(3) In the present invention, heat insulation and antireflection windows are installed at both ends of the excitation light path and the detection light path, which can reduce the heat dissipation of the core of the meter to the outside while ensuring the transmittance of the excitation light and the detection light. In addition, a temperature sensor is installed on the outside of the heating film to observe the temperature change of the meter head in real time.
(4)本发明结构紧凑,操作要求低,对SERF磁强计配件要求低,并为保持碱金属气体的SERF态提供了稳定的低噪声高温环境。(4) The present invention has compact structure, low operation requirements, low requirements for SERF magnetometer accessories, and provides a stable low-noise high-temperature environment for maintaining the SERF state of alkali metal gas.
附图说明Description of drawings
下面结合附图和实施例对本发明进一步说明;The present invention will be further described below in conjunction with the accompanying drawings and embodiments;
图1是本发明的一种SERF原子磁强计的一体化表头装置的主视图;Fig. 1 is the front view of the integrated meter head device of a kind of SERF atomic magnetometer of the present invention;
图2是本发明的一种SERF原子磁强计的一体化表头装置的B-B截面的剖视图;Fig. 2 is a sectional view of the B-B section of the integrated head device of a SERF atomic magnetometer of the present invention;
图3是本发明的一种SERF原子磁强计的一体化表头装置的A-A截面的局部剖视图;3 is a partial cross-sectional view of the A-A section of the integrated head device of a SERF atomic magnetometer of the present invention;
图4是本发明的一种SERF原子磁强计的一体化表头装置的加热膜结构图;Fig. 4 is the heating film structure diagram of the integrated head device of a SERF atomic magnetometer of the present invention;
图中,气室1、烤箱2、隔热层3、外壳4、反射镜部分5、底座6、加热膜7、温度传感器8、窗片9、镜架固定块51、反射镜架52、调节旋钮53、反射镜54、螺杆55、加热膜衬底71、加热膜通孔72、铜线73、供电接头74。In the figure, the air chamber 1, the
具体实施方式Detailed ways
下面根据附图和优选实施例详细描述本发明,本发明的目的和效果将变得更加明白。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the objects and effects of the present invention will become more apparent. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
如图1-3所示,本发明的SERF原子磁强计的一体化表头装置,包括反射镜部分5、底座6以及从外到内依次嵌套的外壳4、隔热层3、烤箱2、气室1,所述的外壳4和底座6固定连接,所述的外壳4、隔热层3、烤箱2的其中两个相对面的相对应位置均开设通孔,与所述的气室1组成激发光通路,所述的烤箱2与激发光通路平行的两个面上设置加热膜7,且气室1和加热膜10分别用高温胶固定于烤箱2内外侧,所述的外壳4、加热膜7、隔热层3、烤箱2的相对应位置均开设通孔,与所述的气室1组成检测光通路;所述的激发光通路和检测光通路垂直;所述的加热膜7的表面设置温度传感器8,所述的激发光通路和检测光通路的入口和出口处设置窗片9,所述的烤箱2、加热膜7、温度传感器8、隔热层3、窗片9组成加热和隔热结构;As shown in Figures 1-3, the integrated head device of the SERF atomic magnetometer of the present invention includes a
所述的反射镜部分5为两个,均固定在所述的外壳4上,且分别位于所述的检测光通路的两端;There are two
所述的气室1中的气体为碱金属气体,可为钾、铷、铯其中的一种,同时通过表头加热结构和外界磁屏蔽系统保持碱金属气体工作于SERF状态。The gas in the gas chamber 1 is an alkali metal gas, which can be one of potassium, rubidium, and cesium. At the same time, the alkali metal gas is kept in the SERF state through the head heating structure and the external magnetic shielding system.
反射镜部分5包括镜架固定块51、反射镜架52、调节旋钮53和反射镜54、螺杆55,所述的镜架固定块51固定在所述的外壳4上,反射镜架52位于所述的镜架固定块51之间,反射镜架52内开设相互垂直的通孔,反射镜54采用介质膜反射镜,反射镜54以相对于检测光通路呈45°的方向固定在反射镜架52上,并在实际使用中可通过调节旋钮53和螺杆55微调反射镜与检测光角度以保证检测光准直入射。The
每个反射镜架51配有两个配合调节旋钮53,可实现反射镜片两自由度微调从而保证检测光路的准直,反射镜架52通过镜架固定块51和螺钉与外壳4固连。Each mirror frame 51 is equipped with two matching
加热膜7采用无磁镍铬材料并通过PCB技术加工双绞和对称结构,通过将加热膜双层对贴的方式尽可能地消除电加热带来的磁场噪声。如图4所示,加热膜7由加热膜衬底71和铜线73组成,加热膜衬底71中心挖有加热膜通孔72,铜线73采用双绞形式走线,铜线与供电接头74连接。The
温度传感器8贴于加热膜7外侧,其接线与加热膜供电线一同接到底座6的电接口上,由此实时检测和控制表头核心温度。烤箱2采用氮化硼材料,与加热膜7共同为气室1中碱金属气体提供SERF状态所需的高温环境。隔热层3采用气凝胶材料进行加热装置的隔热,减少表头内部热量耗散并防止反射镜和被测物温度过高,为保证隔热效果可根据气室温度要求粘贴2-3层气凝胶。The
窗片9采用碱金属原子对应的增透膜材料进行镀膜处理,用于隔绝与表头外界环境的热量耗散。整个表头装置通过螺钉12固定,此表头装置可根据此固定方式进行阵列排布。The window 9 is coated with an anti-reflection film material corresponding to alkali metal atoms, which is used to isolate the heat dissipation from the external environment of the meter head. The entire watch head device is fixed by screws 12, and the watch head device can be arranged in an array according to this fixing method.
外壳4采用PEEK材料,通过螺钉12与其他SERF磁强计配套装置固定。The
整个表头装置均由无磁材料制成。The entire head unit is made of non-magnetic material.
本领域普通技术人员可以理解,以上所述仅为发明的优选实例而已,并不用于限制发明,尽管参照前述实例对发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实例记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在发明的精神和原则之内,所做的修改、等同替换等均应包含在发明的保护范围之内。Those of ordinary skill in the art can understand that the above are only preferred examples of the invention and are not intended to limit the invention. Although the invention has been described in detail with reference to the foregoing examples, those skilled in the art can still understand the Modifications are made to the technical solutions described in the foregoing examples, or equivalent replacements are made to some of the technical features. All modifications and equivalent replacements made within the spirit and principle of the invention shall be included within the protection scope of the invention.
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