A5070067098- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Advanced MRI Techniques and Applications
- Pulmonary Hypertension Research and Treatments
- Transplantation: Methods and Outcomes
- Phase-change materials and chalcogenides
- Inertial Sensor and Navigation
- Cold Atom Physics and Bose-Einstein Condensates
- Liquid Crystal Research Advancements
- Geophysics and Gravity Measurements
- Geophysical and Geoelectrical Methods
- Physics of Superconductivity and Magnetism
- Astronomical Observations and Instrumentation
- Advanced Optical Sensing Technologies
- Congenital Heart Disease Studies
- Advanced Frequency and Time Standards
- Robotics and Sensor-Based Localization
- Magnetic Properties and Applications
- Nonlinear Optical Materials Studies
- Non-Destructive Testing Techniques
- Infrared Target Detection Methodologies
- Neonatal Respiratory Health Research
- Satellite Image Processing and Photogrammetry
- Optical Systems and Laser Technology
- Chalcogenide Semiconductor Thin Films
Beihang University
1989-2022
Ningbo University of Technology
2022
In a hybrid pumping alkali-metal vapor cell filled with both K and Rb atoms, the atom spins are optically pumped by laser polarized through spin exchange. We discovered that ac Stark shift of spins, caused far-off-resonant tuned to absorption lines, was mixed together fast This mixing is studied we demonstrate K-Rb-$^{21}\mathrm{Ne}$ comagnetometer in which eliminated compensating for shift. An elimination method has been developed.
Abstract Atomic co-magnetometers can be utilized for high-precision angular velocity sensing or fundamental physics tests. The sensitivity of a co-magnetometer determines the angle random walk an sensor and detection limit test. A high-sensitivity K-Rb- 21 Ne co-magnetometer, which is sensing, presented in this paper. new type spin relaxation Rb atom spins, broaden zero-field magnetic resonance lines discovered. Further studies show that atoms caused by high electron magnetization field....
We report on the dynamics of spin-polarized Rb and 21Ne ensembles in which spin ensemble a glass vapor cell experiences high magnetic field produced by electron-spin ensemble. The coupled are modeled response transverse-step excitation is solved studied experimentally. Moreover, we analyze frequency to transverse-oscillating field. demonstrate strong transverse damping large shift as precession frequencies match resonance spectroscopies two merge into one. also operation self-compensating...
In recent years, the advantages of multi-sensor integration are gradually highlighted. this paper, an integrated imaging system (IIS) airborne synthetic aperture radar (SAR) and visible light camera (VLC) based on common antenna is designed to meet mission requirement acquiring SAR images simultaneously. The IIS adopts coaxial scheme, its structure simple compact, more suitable for platform. a parameter design method proposed. After parameters design, performance analyzed by simulation....
The aim of the present study was to investigate effect bone marrow mesenchymal stem cell (BMSC) transp1antation on lung and heart damage in a rat model monocrotaline (MCT)-induced pulmonary arterial hypertension (PAH). animals were randomly divided into 3 groups: control, PAH BMSC implantation groups. Structural changes vascular wall, such as artery lumen area (VA) (TAA) measured by hematoxylin eosin (H&E) staining, hemodynamics detected echocardiography. Two weeks post-operation, our...
Background: We investigated the safety and feasibility of intratracheal administration autologous bone marrow-derived mononuclear cells (ABM-MNCs) observed effects in a canine model pulmonary hypertension (PH). Methods Results: The PH was induced by intravenous injection 3mg/kg dehydromonocrotaline (DMCT) via right atrium. Two weeks after DMCT administration, animals received 4 different treatments (n=10 each group): (I) negative control group; (II): ABM-MNCs (III) (IV) PH+ABM-MNCs group....
Celestial body features are important navigation information in deep space exploration. This study provides a synchronous high-precision extraction algorithm for star centroid and nearby celestial edges miniaturized independent optical sensor, which combines the functions of tracker camera. The image is filtered by ring filter template to eliminate interference background improve contrast between target background. second-order directional derivative specific area characteristic method aim...
We demonstrate a new method to determine the nuclear magnetic field of spin-exchange optically pumped noble gas in self-compensated atomic comagnetometer based on steady-state AC response. The result shows that it has higher resolution and precision than previous transient process. Furthermore, convergence frequency is observed low-frequency region its parameter dependence studied simulatively, which may inspire further research into relationship with strong suppression mechanism...
In order to solve the problem that relative permeability of permalloy is missing and difficult measure accurately in an extremely weak magnetic field (EWMF, <1 nT), a method EWMF based on Rayleigh model proposed this paper. method, for material was first introduced. Then, test system measuring standard ring specimen set up. Based data model, functional expression applied obtain achieved. Finally, feasibility accuracy are verified by measurement custom large-size (<1 nT) residual...
The total effective spin-exchange relaxation of naturally abundant Rb in a K–Rb– 21 Ne comagnetometer is analyzed, and the results show that coexistence 87 85 isotopes same volume can lead to large extra broadening compared pure Rb. This mainly comes from contribution equivalent reduction rate. On this basis, an approximate model proposed experimentally demonstrated be more accurate than previous work. study also provides method for determining properties alkali-metal vapor cells.
We theoretically develop a method for maintaining the self-compensated state of K-Rb<sup>21</sup>Ne comagnetometer, which is one core problems in optimizing detection sensitivity comagnetometer to fundamental interactions and inertial rotation. The result Rb<sup>21</sup>Ne coupling dynamics under transverse cosinusoidal magnetic field modulation can present dispersive response with respect varying <sup>21</sup>Ne nuclear B<sup>n</sup>, monotonic interval be used monitor drift B<sup>n</sup>....