Magnetic field gradients reduce the transverse relaxation time of nuclear spins, which usually degrades sensitivity atomic sensors based on spins. We demonstrate improved magnetic gradient compensation by applying first-order and second-order simultaneously in a cubic vapor cell containing 87Rb 129Xe gas. Compared with only compensation, is up to 4.3 times longer when both compensating gradients, indicates that total greatly suppressed joint our experiment. The induced polarized static...

It is generally believed that Ganymede's core composed of an Fe‐FeS alloy and convective motions inside it are responsible for generating the satellite's magnetic field. Analysis melting behavior alloys at pressures suggests that, besides growth a solid inner core, convection can be driven by two novel mechanisms: Fe snow FeS flotation. To advance our understanding field generation in Ganymede, we construct dynamo models which deep growth, Fe‐snow flotation drive convection. Although found...

We study the impact of heater-induced longitudinal field on vector rubidium atomic magnetometers detecting low-frequency transverse magnetic field, which enlightens parameter optimization applied heaters. Our results, both theoretical simulation and experimental measurement included, indicate that by carefully adjusting frequency amplitude, can be efficiently eliminated; meanwhile, signal amplitude potentially enhanced. The numerical agrees well with in various cases, demonstrating our...

In order to polarize 87Rb vapor effectively with ultranarrow linewidth diode laser, we studied the polarization as a function of some parameters including buffer gas pressure and laser power. Moreover, also discussed methods which split or modulate frequency so pump two ground hyperfine levels efficiently. We obtained useful results through numerical simulation. If is high that structure unresolved, insensitive at peak absorption point splitting modulation do not show improvement. At low...

We proposed a new bias-approach method for measuring longitudinal relaxation time of 129Xe. Compared with the delayed pulse method, single-scan is significantly decreased by more than 20 times, and differences are 2% 0.7% two sample cell A B respectively. By giving small static magnetic field in transverse domain, π-pulse-induced 87Rb magnetometer signal bias respect to magnetization xenon was obtained. then use π/2 find half-life relaxation. Since has low requirement systematic robust, it...

We analyze the scale factor linearity, steady-state, transient, and noise characteristics of a nuclear magnetic resonance oscillator coupled with phase-locked loop, which makes its performance improvement possible by balanced strategy in optimizing parameters based on proposed model. The numerical simulation indicates that simple system gives better linearity transient response than system, while steady-state solution is similar between two experimental validation. phase suppression...

Nuclear magnetic resonance gyroscopes (NMRGs) may be operated in an environment with violent vibration that usually contains both linear components and angular components. To analyze the influence of on NMRG, cross-axis coupling effects are studied. The rotation rates induce equivalent field. Its can described by Bloch equations. approximate frequency shift amplitude spin oscillator field were obtained, which was validated numerical simulation. findings show component leads to a remarkable...

In order to solve the defects of high driving voltage and a large volume existing electro-optical modulators, double-waveguide stacked graphene optical modulator based on Mach-Zehnder Interferometer structure is designed in this paper. First, size traditional planar effectively reduced by stacking two modulators vertically. Secondly, changing relative position electrode waveguide, coupling effect waveguide enhanced, reduced. Finally, performance electro-optic verified finite element method....

Spin exchange optical pumping is an efficient technique to obtain large quantities of hyperpolarized ¹²⁹Xe nuclei. The spin oscillating perturbation theory for polarized nuclei established in this paper. theoretical framework relies on the method steady state solution derive rate equations and analytical solutions nuclear spin. This model gives rise a novel fast determination longitudinal relaxation time <i>T₁ </i>for 129Xe direct measurement applied gas phase reduces...