A5049696195- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Planetary Science and Exploration
- Earthquake Detection and Analysis
- Space exploration and regulation
- Magnetic confinement fusion research
- Geophysics and Gravity Measurements
- Atmospheric Ozone and Climate
- Spaceflight effects on biology
- Mechanical Behavior of Composites
- Spacecraft Design and Technology
- Plasma Diagnostics and Applications
- Fiber-reinforced polymer composites
- Lattice Boltzmann Simulation Studies
- Image and Signal Denoising Methods
- Complex Systems and Time Series Analysis
- Ideological and Political Education
- Construction Project Management and Performance
- Fluid Dynamics Simulations and Interactions
- Quantum and electron transport phenomena
- Advanced Fiber Optic Sensors
- Educational Reforms and Innovations
- Aerosol Filtration and Electrostatic Precipitation
Wuhan University
2009-2024
Chinese Academy of Sciences
2023-2024
Institute of Geology and Geophysics
2023-2024
Hubei University of Arts and Science
2023-2024
Southwest University of Science and Technology
2023
Wuchang University of Technology
2020-2022
Abstract Using high‐resolution data from the Magnetospheric Multiscale mission, an electron‐only reconnection current sheet is found between two successive dipolarization fronts (DFs). The occurs northward component of magnetic field flux pileup region (FPR) first DF (DF1) and southward dip second (DF2). faster DF2 compresses FPR DF1, which constitutes anti‐parallel topology reduces thickness sheet. Further analysis shows that unstable to electron tearing instability, may power onset...
Abstract The nature of the plasma wave modes around ion kinetic scales in highly Alfvénic slow solar wind turbulence is investigated using data from NASA’s Parker Solar Probe taken inner heliosphere, at 0.18 au Sun. joint distribution normalized reduced magnetic helicity σ m ( θ RB , τ ) obtained, where angle between local mean field and radial direction temporal scale. Two populations are identified: first population has < 0 for frequencies (in spacecraft frame) ranging 2.1 to 26 Hz 60°...
Abstract Plasma waves are believed to play an important role during magnetic reconnection. However, the specific of upper hybrid (UH) in electron diffusion region (EDR) remains elusive, owing absence high-resolution measurements. We analyze one EDR event magnetotail on 2017 July 11 observed by Magnetospheric Multiscale ( MMS ) mission. To best our knowledge, this is first time that intense UH have been . The agyrotropic crescent-shaped distributions could result waves. Concomitant with...
Abstract Based on the unprecedented high‐resolution data from Magnetospheric Multiscale mission, we investigate energy dissipation in turbulent reconnection outflow during magnetic terrestrial magnetotail. It is found that this has plenty of intermittent structures at kinetic scales accompanied by abundant current filaments. Strong occurs with a high partial variance increments index, and regions strong Further analyses reveal electron heating presence increase temperature currents. This...
The scaling of the turbulent spectra provides a key measurement that allows to discriminate between different theoretical predictions turbulence. In solar wind, this has driven large number studies dedicated issue using in-situ data from various orbiting spacecraft. While semblance consensus exists regarding in MHD and dispersive ranges, precise transition range actual physical mechanisms control it remain open questions. Using high-resolution inner heliosphere Parker Solar Probe (PSP)...
We present a statistical analysis for the characteristics and radial evolution of linear magnetic holes (LMHs) in solar wind from 0.166 to 0.82 AU using Parker Solar Probe observations first two orbits. It is found that LMHs mainly have duration less than 25 s depth range 0.25 0.7. The durations slightly increase depths become deeper with increasing heliocentric distance. Both plasma temperature density about 50% all events inside are higher ones surrounding holes. average occurrence rate...
Abstract We perform a statistical analysis on current density, energy conversion, and electron acceleration in the primary flux ropes (PFRs) secondary (SFRs) distinguished by out‐of‐plane current, respectively. It is found that filaments are plentiful both PFRs SFRs. The closer to center of SFRs, stronger | J is. • E ′ intermittent PFRs. However, almost stays positive local adiabatic electrons SFRs explored. Fermi betatron closely related adjacent magnetic field bulk flow which can lead...
Abstract We utilize the data from Parker Solar Probe mission at its first perihelion to investigate three-dimensional (3D) anisotropies and scalings of solar wind turbulence for total, perpendicular, parallel magnetic-field fluctuations kinetic scales in inner heliosphere. By calculating five-point second-order structure functions, we find that three characteristic lengths eddies total perpendicular local reference frame <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Abstract With high‐resolution data from Magnetospheric Multiscale (MMS) mission, an ion‐scale flux rope (FR) with a heavily tilted axis is observed in the tailward outflow of magnetic reconnection terrestrial magnetotail. Combined field‐aligned electron distribution and positions MMS when X‐line FR are observed, inferred to be caused by extension dawn‐dusk direction. J · E ′ negative electrons losing energy FR. An vortex embedded plane perpendicular inside The induced field generated has...
Abstract Dipolarization front (DF), embedded in fast plasma flow, is a sharp structure with the increase of B z short time and plays an important role energy dissipation particle accelerations magnetotail. However, detailed physics at small scales still unclear DF due to limitation previous mission. In present study, electron‐scale plateau observed by Magnetospheric Multiscale (MMS) By analyzing velocity electrons, we find that surrounded sub‐ion‐scale electron vortex, which first...
Abstract Magnetic reconnection is a universal phenomenon existing in the space. Energy conversion one of essential parts discussed for decades. Positive energy ( J · E ′ > 0) usually regarded as sign electron diffusion region (EDR), while negative < turns out to gather outer EDR. Here we report appearing inflow edge inner EDR, based on Magnetospheric Multiscale mission observations and particle‐in‐cell simulations. Both simulations verify that this mainly contributed from pressure...
Abstract It is widely acknowledged that positive energy dissipation J ⋅ E ′ from the fields to plasmas occurs in electron diffusion region (EDR) during magnetic reconnection. There also exists negative outer EDR, but what causes such still unclear. In present study, we applied 2.5‐D particle‐in‐cell simulation investigate EDR through generalized Ohm's law. found of expands space with evolution reconnection, and embodiment dominated by inertial term law due deceleration electrons EDR. This...
Using the Parker Solar Probe data taken in inner heliosphere, we investigate power and spatial anisotropy of magnetic-field spectra at kinetic scales (i.e., around sub-ion scales) solar wind turbulence heliosphere. We find that strong magnetic occurs with strongest perpendicular direction respect to local field (forming an angle theta_B mean flow velocity). The spectral index varies from -3.2 -5.8 when changes 90 180 (or 0) deg, indicating indices turbulence. a diagnosis based on helicity,...
Abstract The dramatic changes in the magnetic field at dipolarization front (DF) provide a suitable environment for electron acceleration, which usually can cause flux enhancement of energetic electrons behind front. However, it is unknown whether observed DF are energized locally, and mechanism accelerates unclear. Our study performs direct quantitative analysis to reveal acceleration process using high-time-resolution data from NASA's Magnetospheric Multiscale mission. fluxes 90° enhanced...
Basalt Fiber Reinforced Polymer (BFRP) composites have huge potential application respects for some civil fields due to enough strength/modulus weight and low cost by replacing carbon fiber composites. Aiming at the issues in Resin-Rich Region (RRR) Interfacial Transition (ITR) of reinforced polymer composites, characteristic Aramid Pulp (AP) fibers with micro-fiber trunk nano-fiber branches were manufactured into multiple non-woven ultra-thin interleaving interlayers BFRP via compression...
Abstract Utilizing the unprecedented high-resolution Magnetospheric Multiscale mission data from 2015 September to 2017 December, we perform a statistical study of electron vortexes in turbulent terrestrial magnetosheath. On whole, 506 vortex events are successfully selected. Electron can occur at four known types magnetic structures, including 78, 42, 26, and 39 observed during crossings current sheets, holes, peaks, flux ropes, respectively. Except for rest “Others” category, defined as...
Abstract Electron vortices are usually embedded within different magnetic structures in space plasmas. The effects, including the nonideal electric field, energy dissipation and of electron on these still unclear. Utilizing unprecedented high‐resolution data from Magnetospheric Multiscale mission terrestrial magnetosheath, we statistically investigate effects structures. Both fields have no obvious correlations with scales vortices. However, compared to scales, stronger found between...
Under the education pattern of “big thinking and politics,” whether collaborative function curriculum politics ideological political courses can be effectively played is related to fundamental task cultivating people really implemented. This paper analyzes practical significance, existing problems, characteristics education, improves degree puts forward key points implementation paths from four aspects system, teacher team, teaching means, top-level design.
Abstract Turbulence is ubiquitous in space and astrophysical plasmas, such as the solar wind, planetary magnetospheres, interstellar medium. It plays a key role converting electric magnetic energies into kinetic energy of plasma particles. Here, properties MHD kinetic-scale fluctuations Mercury environment are investigated using data collected by MESSENGER spacecraft from 2011 March 23 to 2015 April 28. found that spectral indices at scales vary ∼−5/3 near-Planet wind (possibly foreshock)...
Abstract Magnetosonic waves, with the frequency between proton cyclotron and lower hybrid frequency, mainly occur near Earth's magnetic equatorial plane play an important role in magnetospheric dynamics. In this paper, we report unusual magnetosonic waves nonlinear harmonics observed by Magnetospheric Multiscale mission magnetotail. These have multiband enhanced electromagnetic power spectral densities ( B w / 0 up to 1/45) from below above are quasi‐perpendicular propagating linearly...
Abstract Recent numerical simulations of plasma turbulence showed that magnetic field line curvature plays a key role in particle energization. Based on situ high-resolution data provided by the four Magnetospheric Multiscale spacecraft, we investigate and its turbulent magnetosheath plasma. Our analysis reveals exhibits two power-law distributions: low follows scaling as κ 0.33 , large has −2.16 . The is anticorrelated with magnitude field, but positively related to normal force, drift...
Abstract Using high‐resolution data of Magnetospheric Multiscale mission, we observed a gradual but periodical dipolarization process (DPs) in the Earth's magnetotail for first time. These sub‐DPs, characterized by increase B z component and magnetic magnitude t , have period ~16 s. The electrons cigar distribution three sub‐DPs pancake last sub‐DP, which excites two oppositely propagating whistler waves. At trailing boundary decreases sharply. Meanwhile, strong tailward duskward plasma...
Abstract Using four‐point measurements from the Magnetospheric Multiscale (MMS) mission, we identify whistler waves at boundary of an ion scale magnetic hole, which should be locally excited rather than propagated other regions. Based on measured local plasma parameters, include those for bidirectional electron beams with temperature anisotropy, frequency range growth rate derived kinetic theory is consistent observations, while in absence such negative; hence, observed are by anisotropy....
Abstract Utilizing data from the Magnetospheric Multiscale mission, sub‐structures of separatrix region during reconnection are investigated. A small current system in is embedded large Hall system, which appears as a quadrupole current. This has an opposite direction to and cancels part magnetic field. The formation possibly related patchy parallel electric field can be divided into three sub‐layers according electron frozen‐in condition. E n enhances two outside sub‐layers, where strong...