Journal
PHYSICAL REVIEW A
Volume 103, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.103.053523
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Funding
- Natural Science Foundation of China [11974329]
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This paper presents a Herriott-cavity-assisted closed-loop Xe isotope gas comagnetometer that utilizes a passive method to improve system stability and sensitivity. The system has wide applications in precision measurements.
We present in this paper a Herriott-cavity-assisted closed-loop Xe isotope gas comagnetometer. In this system, Xe-129 and Xe-131 atoms are pumped and probed by polarized Rb atoms and continuously driven by oscillating magnetic fields, whose frequencies are kept on resonance by phase-locked loops. Different from other schemes, we use a Herriott cavity to improve the Rb magnetometer sensitivity instead of the parametric modulation method, and this passive method is designed to improve the system stability while maintaining the sensitivity. This system has demonstrated an angle random walk of 0.06 degrees/h1/2 and a bias instability of 0.2 degrees/h (0.15 mu Hz) with a bandwidth of 1.5 Hz. By adding a closed-loop Rb isotope comagnetometer, we can extend this system to dual simultaneously working comagnetometers sharing the same cell. This extended system has wide applications in precision measurements, where we can simultaneously and independently measure the coupling of anomalous fields with proton spin and neutron spin.
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