A5036298085- Dust and Plasma Wave Phenomena
- Ionosphere and magnetosphere dynamics
- High-pressure geophysics and materials
- Plasma Diagnostics and Applications
- Microstructure and mechanical properties
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Microstructure and Mechanical Properties of Steels
- Theoretical and Computational Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Laser-induced spectroscopy and plasma
- Material Dynamics and Properties
- Statistical Mechanics and Entropy
- Magnetic confinement fusion research
- Particle Dynamics in Fluid Flows
- Semiconductor Quantum Structures and Devices
- Quantum and electron transport phenomena
- Hydrogen embrittlement and corrosion behaviors in metals
- nanoparticles nucleation surface interactions
- Optical measurement and interference techniques
- Vacuum and Plasma Arcs
- Particle accelerators and beam dynamics
- Plasma Applications and Diagnostics
- Catalytic Processes in Materials Science
- Quantum Information and Cryptography
Donghua University
2016-2025
Ministry of Education of the People's Republic of China
2021
Max-Planck-Institut für Nachhaltige Materialien
2020
Eindhoven University of Technology
2015-2019
Institut de Recherche sur la Fusion par Confinement Magnétique
2018
Materials innovation institute
2015
Max Planck Institute for Extraterrestrial Physics
2010-2014
Max Planck Society
2010-2014
Shanghai Jiao Tong University
2007-2009
A basic statistical mechanics analysis of many-body systems with non-reciprocal pair interactions is presented. Different non-reciprocity classes in two- and three-dimensional binary (relevant to real experimental situations) are investigated, where the action-reaction symmetry broken for interaction between different species. The asymmetry characterized by a parameter $\Delta$, which ratio reciprocal forces. It shown that "constant" (when $\Delta$ independent interparticle distance $r$) one...
An analysis of lattice wave spectra in a three-dimensional dusty plasma structure formed direct current gas discharge with alternating polarity under microgravity conditions is reported. The are determined using the Fourier transform microparticle velocities, measured by tracking microparticles subpixel resolution. Both longitudinal and transverse modes detected analyzed. absence "k-gap" long-wavelength domain mode strongly suggests that form solid structure. Therefore, experimental compared...
Slow dynamics in an amorphous quasi-two-dimensional complex plasma, comprised of microparticles two different sizes, was studied experimentally. The motion individual particles observed using video microscopy, and the self-part intermediate scattering function as well mean-squared particle displacement calculated. long-time structural relaxation reveals characteristic behavior near glass transition. Our results suggest that binary plasmas can be excellent model system to study slow classical...
Lath martensite is widely present in advanced high strength steels as the key strengthening phase. Unexpectedly ductility of lath has been reported literature both single-phase and multi-phase steels, however, without systematic identification underlying plasticity mechanisms. In this study, first, well-defined micro-tensile tests are carried out on fully martensitic steel with a clean large substructure variety boundary orientations respect to loading direction. Two deformation mechanisms...
A cloud of microparticles was trapped deep in the sheath a radio-frequency (rf) discharge, very close to lower (grounded) electrode plasma chamber. This achieved by employing specifically designed rf-driven segment integrated electrode, which provided an additional confinement compressing high density. After switching off, “exploded” due mutual interparticle repulsion. By combining simple theoretical model with different numerical simulation methods, some basic properties complex plasmas...
A series of experiments dedicated to probing the phenomenon lane formation in binary complex plasmas over a broad range parameters has been performed with PK-3 Plus laboratory on board International Space Station (ISS) under microgravity conditions. In experiments, bunches small particles were driven through background big particles. We show that dynamics varies considerably density and size ratio between For consecutive injections memory effect previous penetration was discovered for first...
Agglomeration of highly charged microparticles was observed and studied in complex plasma experiments carried out a capacitively coupled rf discharge. The agglomeration caused by strong waves triggered particle cloud decreasing neutral gas pressure. Using high-speed camera during this unstable regime, it possible to resolve the motion individual show that relative velocities some particles were sufficiently high overcome mutual Coulomb repulsion hence result agglomeration. After stabilizing...
Density waves were studied in a phase-separated binary complex plasma under microgravity conditions. For the big particles, self-excited by two-stream instability, while for small they excited heartbeat instability with presence of reversed propagating pulses different frequency. By studying dynamics wave crests at interface, we recognize "collision zone" and "merger before after respectively. The results provide generic picture wave-wave interaction interface between two "mediums".
The propagation of a dissipative solitary wave across an interface is studied in binary complex plasma.The experiments were performed under microgravity conditions the PK-3 Plus Laboratory on board International Space Station using microparticles with diameters 1.55 µm and 2.55 immersed low-temperature was excited at edge particle-free region propagated from sub-cloud small particles into that big particles.The interfacial effect observed by measuring deceleration crest.The results are...
Implications of the recently discovered effect channeling upstream extra particles for transport phenomena in a two-dimensional plasma crystal are discussed. Upstream levitated above lattice layer and tended to move between rows particles. An example heat is considered, where act as moving sources, which may lead anomalous transport. The average length observed was 15-20 interparticle distances. Other features process also reported.
In this letter, we present the first numerical study on structural and dynamical properties of a quasi-two-dimensional (q2D) binary complex plasma with Langevin dynamics simulation. The effect interaction non-reciprocity structure is investigated by comparing systems pure Yukawa point-wake interactions. long-time alpha-relaxation for latter system revealed plotting analyzing intermediate scattering function. results clearly indicate that q2D suitable model to glass former. interactions...
Machine learning is applied to investigate the phase transition of two-dimensional complex plasmas. The Langevin dynamics simulation employed prepare particle suspensions in various thermodynamic states. Based on resulted positions two extreme conditions, bitmap images are synthesized and imported a convolutional neural network (ConvNet) as training sample. As result, diagram obtained. This trained ConvNet model can be directly sequence recorded using video microscopy experiments study melting.
Numerical experiments are performed to investigate the initial stages in phase separation induced by interaction non-additivity Δ binary complex plasmas. A characteristic length scale obtained from time-dependent pair correlation functions is used monitor domain growth. It found that growth follows a power law with an exponent α of around 1/3, which good agreement Lifshitz-Slyozov for diffusive regime separation. also almost independent as long system within spinodal region. The coupling...
For both single-phase and multiphase metallic materials, it is necessary to understand the mechanical behavior on grain-size scale in detail get information that not obtainable from macro-scale characterizations. This paper presents a methodology for uniaxial tensile testing of micro-specimens isolated bulk material. The proposed concept multiple parallel micro-tensile specimens at tip macro-sized wedge reduces alignment work offers an easy way specimen handling. selection site-specific...
Experimental observations are presented of unusual ('abnormal') microparticles, having trajectories very different from those the majority microparticles in particle cloud PK-3 Plus chamber (on board International Space Station). To quantitatively study mechanism driving this 'irregular' motion, we performed a series experiments with quasi-two-dimensional complex plasmas modified GEC RF reference cell ground-based laboratory. The results show that average velocity increases illumination...
Two-dimensional plasma crystals are characterized by a strong up-and-down asymmetry not only due to gravity but also the presence of flow at location particles. We study for first time interaction single-layer crystal with charged extra particles located above it (upstream ions). Upstream tend move between rows in crystal, accelerate supersonic speeds, and excite attraction-dominated Mach cones wakes crystal.
We present the first experimental realisation on lane formation in binary complex plasmas under gravity conditions. The amount of penetrating particles can be controlled. experiment operated with stable conditions continuously, which allows to study steady state. driving force is independent time and position background density homogeneous isotropic. This provides an ideal model system for comparison numerical experiments observations colloidal suspensions. setup based PK-3 Plus laboratory...
A binary complex plasma consists of two different types dust particles in an ionized gas. Due to the spinodal decomposition and force imbalance, masses diameters are typically phase separated, resulting interface. Both external excitation internal instability may cause interface move with time. Support vector machine (SVM) is a supervised learning method that can be very effective for multi-class classification. We applied SVM classification based on image brightness locate plasma. Taking...