A5050566348- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Advanced MRI Techniques and Applications
- Advanced Frequency and Time Standards
- Geophysics and Sensor Technology
- Magnetic Field Sensors Techniques
- Advanced NMR Techniques and Applications
- Magnetic and transport properties of perovskites and related materials
- Cold Atom Physics and Bose-Einstein Condensates
- NMR spectroscopy and applications
- Earthquake Detection and Analysis
- Geomagnetism and Paleomagnetism Studies
- Acute Ischemic Stroke Management
- Inertial Sensor and Navigation
- Sensor Technology and Measurement Systems
- Non-Invasive Vital Sign Monitoring
- Magneto-Optical Properties and Applications
- Advanced MEMS and NEMS Technologies
- Global Educational Reforms and Inequalities
- Technology and Human Factors in Education and Health
- Toxic Organic Pollutants Impact
- Antiplatelet Therapy and Cardiovascular Diseases
- Solar Radiation and Photovoltaics
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Neurological Disease Mechanisms and Treatments
Beihang University
2016-2025
Zhengzhou University
2023-2025
Hefei University
2023-2024
China Centre for Resources Satellite Data and Application
2024
Ministry of Natural Resources
2024
Hefei National Center for Physical Sciences at Nanoscale
2024
Xian Yang Central Hospital
2023
Ministry of Education of the People's Republic of China
2023
University of Science and Technology of China
2023
Merchants Chongqing Communications Research and Design Institute
2022
A new design method is proposed for a triaxial magnetic field gradient compensation system based on ferromagnetic boundary atomic sensors. The target and the whale optimization algorithm are combined to coils thus transforming complex analytical solution process into an intelligent problem, while mirror introduced decouple coil from shield. Magnetic designed according with divergence rotation theorems form gradients suppress inhomogeneity in nine directions. simulation experimental results...
Integrating classical estimation and control theory with quantum systems holds potential for measurement improvement. Here, we report a real-time linear quadratic regulator (LQR) optimal spin damping in electron-nuclear spin-coupling regime. The aim is quicker response enhanced noise suppression precision measurements. Using Kalman observer electron data, estimate the state of nondirectly observable nuclear spin. LQR full-state feedback applied to achieve faster damping. Demonstrated an...
Atomic spin gyroscopes (ASGs) based on spin-exchange relaxation-free (SERF) co-magnetometers represent a new generation of ultra-high-precision inertial sensors. However, their long-term stability is significantly constrained by the electron polarization. Despite its critical importance, current research lacks effective methods for in situ and real-time measurement This paper addresses this gap developing model pump laser propagation within vapor cell proposing an Euler-particle swarm...
A precision measurement of the Earth's rotation is reported by using a K-Rb-${}^{21}$Ne comagnetometer, where it found that existence light shift arising from circularly polarized pump laser enables comagnetometer to sense dual-axis rotations.
We describe a dual-axis atomic spin gyroscope based on an alkali metal-noble gas comagnetometer. Alkali metal vapor is optically pumped, and then the noble hyperpolarized along z axis. When sensing transverse rotation, polarized will be induced to precess produce effective magnetic field in x – y plane for metals under. Operating spin-exchange relaxation-free regime, atoms are modulated by axis serve as integrated in-situ magnetometer detect gyroscopic precession axes simultaneously, using...
Spin-exchange relaxation-free gyroscope (SERFG) is a promising rotation sensor, and the bias error one of its most important characteristics. It identified that measurement noise induced by thermal magnetization fluctuations inherent in ferrite shield SERFG limits stability. The root cause this lies low-frequency magnetic field sensitivity dominated nuclear spin relaxation rate. In paper, steady state response model modified considering non-negligible rate pressure-dependent experimentally...
A nuclear spin co-magnetometer operated in the spin-exchange relaxation-free (SERF) regime is a promising tool for long-term navigation application its abilities to sense inertial rotation and suppress environmental magnetic field disturbance. The response model of K-Rb- <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</sup> Ne derived based on state space method experimentally validated tabletop SERF co-magnetometer. theoretical experimental...
This paper investigates the performance optimization of optically pumped magnetometers under zero-field parametric modulation. Based on analytical solutions Bloch equation, both longitudinal and transverse modulations are studied experimentally. To estimate nonuniform polarization distribution alkali-metal atoms in vapor cell, an average pumping rate model is proposed. Furthermore, accuracy this measurement relaxation verified via agreement between experimental theoretical values. The...
Although spin-exchange relaxation-free (SERF) comagnetometers have been widely used for fundamental physics tests and rotation sensing, their applications encounter considerable obstacles, due to the uncontrolled compensation magnetic field in such a system. The authors demonstrate real-time closed-loop control method stabilize point of K-Rb-${}^{21}$Ne comagnetometer, improve systematic stability, enlarge linear measuring range, suppress cross-talk error.
The coupling between the coil and cylindrical magnetic shield (CMS) in atomic sensors not only results inconsistency of constant with theory but also deteriorates uniformity, which affects sensor performance. To solve above deficiencies, a design method highly uniform field coils inside CMS based on model finite permeability thickness particle swarm optimization (PSO) dynamic inertia weights is proposed for first time. established by Green's function (GFM). Then it combined nonlinear method,...
In this paper, three dimensional spherical magnetic field coils are proposed and optimized for atomic sensors that require highly uniform within a limited volume. The design objective of the coil is transformed into nonlinear optimization model with constraints, which solved by combining particle swarm algorithm. Compared traditional cylindrical tri-axial system whose volume aspect ratio structure, not only effectively reduce but also provide consistent performance in coordinate axis...
The probe laser intensity working point optimization of the co- magnetometer operated in spin-exchange relaxation-free (SERF) regime is studied theoretically and experimentally this article. Based on steady-state solution Bloch equation, error equation output signal considering pumping effect established. A method for real-time measuring rate SERF presented. Combined with measurement results, a quickly finding optimal noise long-term stability under different intensities are measured to...
A compact dual-axis $\mathrm{K}\ensuremath{-}\mathrm{Rb}\ensuremath{-}^{21}\mathrm{Ne}$ comagnetometer with one circularly polarized pump beam and two orthogonal linearly probe beams is presented. It can be exploited for rotation sensing by operating in the spin-exchange relaxation-free regime. Due to light shift arising from laser, there a cross-talk effect between sensitive axes, which limits applications. To eliminate this effect, an external field parallel direction of used compensate...
Spin-exchange relaxation-free (SERF) co-magnetometer is considered to be a promising nuclear spin gyroscope due its ultrahigh rotation measurement sensitivity and magnetic field disturbance cancellation ability. Recent experiments indicate that the relaxation of noble-gas spins would result in reduction ability, which means noise from passive shield SERF can cause rate error. In this paper, frequency response atomic magnetometer derived based on state space method different materials are...
This paper investigates the laser polarization error in optical rotation detection system (ORDS) of an atomic comagnetometer (ACM), which will seriously degrade long-term performance ORDS. We first establish transmission model ORDS by using Jones matrix concerning imperfection polarizers. Then, we analyze based on this and propose a novel suppression method. Finally, experimentally test ACM before after to verify effectiveness proposed The experimental results show that can be improved...
The transverse light-shift can induce non-negligible polarization error in the output signal of spin-exchange relaxation-free (SERF) co-magnetometer. In this paper, a novel method for rapid measurement based on steady-state response co-magnetometer is proposed firstly, then sources compact SERF modeled and analyzed from three aspects: non-ideal linear probe laser, circular dichroism atomic spin ensembles, stress-induced birefringence effect cell wall. Furthermore, decoupling suppression...
The magnetic field gradient affects the improvement of sensitivity and suppression ability spin-exchange relaxation-free co-magnetometer. This paper proposes a response model co-magnetometer considering based on state-space method. effects transverse longitudinal gradients system’s scale factor, bandwidth are analyzed. analysis shows that whole frequency band system response, including steady-state dynamic performance, while only response. With increase gradient, effect becomes more...
Stroke patients may experience reduced socialization and feelings of isolation due to post-stroke sequelae such as impaired motor function cognitive deficits. Factors associated with loneliness need be explored develop targeted interventions. However, little is known about the impact self-perceived burden illness stigma on in this population.The aim study was explore mediating effect stroke patients.The cluster random sampling method adopted select 1028 from neurology department third-grade...
Depending on high permeability, Curie temperature, and low eddy current loss noise, nanocrystalline alloys, as the innermost layer, exhibit great potential in construction of cylindrical magnetic shielding systems with a coefficient noise. This study compares noise 1 Hz, simulated by finite element method (FEM), shield different structural parameters based measured initial permeability commercial Fe-based (1K107). The results demonstrate that is irrelevant to pump probe hole diameter....