Structure optimization of non-magnetic electric heating film for spin exchange relaxation free magnetometer

Sensors International Pub Date : 2023-01-01 DOI:10.1016/j.sintl.2023.100233

Xiaofei Liu , Jing Zhu , Shuai Wang , Lianqing Zhu

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引用次数: 1

Abstract

Spin exchange relaxation free (SERF) atomic magnetometer is one of the most sensitive magnetometers. High temperature and a non-magnetic environment are two key conditions to achieve ultra-high sensitivity. In this paper, a non-magnetic heating film with magnetic field self-suppression is optimized by the genetic algorithm method. Four structural parameters of the non-magnetic heating film including the wire spacing, wire width, wire thickness, and layer distance are optimized to minimize the magnetic field in the heated space. The simulation result based on the finite element analysis method shows that the magnetic field and the temperature field produced by a pair of heating films at the vapour cell are uniform. Finally, the magnetic field experiment proved that when the current is 10 mA, the magnetic field is 3.0520 nT. The temperature control experiment indicates that the temperature could be stabilized at 180 ± 0.2 °C. This study is significant for electric heating with a lower magnetic field and contributes to further improving the performance of atomic sensors.

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用于自旋交换弛豫自由磁强计的非磁性电热膜结构优化

无自旋交换弛豫（SERF）原子磁强计是最灵敏的磁强计之一。高温和无磁环境是实现超高灵敏度的两个关键条件。本文采用遗传算法对具有磁场自抑制功能的非磁性加热膜进行了优化设计。优化了非磁性加热膜的四个结构参数，包括线间距、线宽度、线厚度和层距离，以最小化加热空间中的磁场。基于有限元分析方法的模拟结果表明，一对加热膜在汽室处产生的磁场和温度场是均匀的。最后，磁场实验证明，当电流为10mA，磁场为3.0520温度控制实验表明，温度可以稳定在180±0.2°C。这项研究对低磁场的电加热具有重要意义，有助于进一步提高原子传感器的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sensors International

CiteScore

17.40

自引率

0.00%

发文量