OPTICS & OPTOELECTRONIC TECHNOLOGY, Volume. 22, Issue 6, 129(2024)
Design and Experimental Verification of Quantized Axis Magnetic Field for Dynamic Atomic Gravimeter
In atomic interference based on two-photon Raman transitions,the relative angular deviation between the magnetic field of the quantization axis and the direction of the Raman light wave vector,as well as its spatial uniformity and temporal stability,are the key factors affecting the atomic interferometer. In this paper,a triaxial orthogonal Helmholtz coil is used to compensate for the angular deviation between the magnetic quantization axis direction of the atomic gravimeter and the Raman light wave vector in a dynamic environment,and the driving current of each axis coil and the magnetic field gradient in the interference region are calculated based on COMSOL simulation. The control strategy of simulated PID+ disturbance suppression is used to control the constant current source to drive the triaxial coil to improve the long-term stability of the magnetic field of the quantized axis. The experiments verify the feasibility of the three-axis Helmholtz coil to compensate the magnetic quantization axis,and realize the direction control of the magnetic quantization axis in the interference region and the magnetic field gradient with the perturbation not exceeding 3 mGs,which lays a technical foundation for the development of dynamic atomic gravimeter and has certain reference significance for dynamic atomic interferometer based on two-photon Raman transition.
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LI Jun-qiang, MA Si-qian, CHEN Xin-wen, ZHOU Chao. Design and Experimental Verification of Quantized Axis Magnetic Field for Dynamic Atomic Gravimeter[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2024, 22(6): 129
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Received: Jul. 15, 2024
Accepted: Jan. 21, 2025
Published Online: Jan. 21, 2025
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CSTR:32186.14.