吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (2): 686-692.doi: 10.13229/j.cnki.jdxbgxb201702046

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Non-magnetism heating system for atomic gas cell used in SERF atomic magnetometer

WANG Yan-zhang1, 2, QIN Jia-nan1, 2, ZHANG Xue1, 2, CHEN Chen1, 2   

  1. 1.College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061,China;
    2.Key Laboratory for Geophysical Exploration Equipment, Ministry of Education, Jilin University, Changchun 130061,China
  • Received:2016-02-02 Online:2017-03-20 Published:2017-03-20

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Abstract: The temperature of atomic cell is an important factor affecting the measurement sensitivity of Spin-Exchange-Relaxation-Free (SERF) atomic magnetometer. A non-magnetism heating system with high-precision is designed and developed. In hardware design, the PTC heating device and Pt1000 temperature sensing circuit are adopted to complete the closed-lop control system. In software design, the three parameters P, I and D are set respectively for different temperatures. Meanwhile, the integral separated PID control method is used to eliminate overshoot, and an on-off heating mode is used to satisfy the requirement for ultra-low magnetic field when the magnetometer is working. Temperature control test is performed using the developed heating system. The temperature control range is 80 ℃ to 190 ℃, the accuracy is ± 0.02 ℃, and the control procedure is 60 s. In addition, the magnetic interference is less than 0.1 nT when the heating is discontinuous, which provides the reliability to promote the performance of SERF atomic magnetometer.

Key words: electronic technology, spin-exchange-relaxation-free atomic magnetometer, non-magnetism heating system, digital PID control method, atomic gas cell

CLC Number: 

  • TP271
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