A5031008686- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Laser-Plasma Interactions and Diagnostics
- Superconducting Materials and Applications
- Dust and Plasma Wave Phenomena
- Particle accelerators and beam dynamics
- Adsorption and biosorption for pollutant removal
- Fusion materials and technologies
- Nanomaterials for catalytic reactions
- Laser-induced spectroscopy and plasma
- Spectroscopy and Quantum Chemical Studies
- GNSS positioning and interference
- Advanced Chemical Physics Studies
- Ocular Surface and Contact Lens
- Physics of Superconductivity and Magnetism
- Material Properties and Processing
- Plasma Diagnostics and Applications
- Climate Change and Health Impacts
- Advanced biosensing and bioanalysis techniques
- Chemical and Physical Studies
- Bluetooth and Wireless Communication Technologies
- Molecular spectroscopy and chirality
- Rheology and Fluid Dynamics Studies
- Ocean Waves and Remote Sensing
University of Science and Technology of China
2016-2025
Wuhan Donghu University
2025
Wuhan University
2025
Chongqing University of Science and Technology
2022-2024
Chinese Academy of Sciences
2014-2022
Institute of Plasma Physics
2014-2020
Hefei Institutes of Physical Science
2014
Princeton Plasma Physics Laboratory
2014
In contrast with the stability effects of trapped energetic ions on tearing modes, circulating (CEI) modes depend toroidal direction, and are closely related to momentum ions. CEI provide an additional source or sink affect modes. For co-CEI, can be stabilized if is large enough. On other hand, growth enhanced by counter-CEI. Further, a possibility suppress island neoclassical co-CEI pointed out.
The effects of energetic ions on stability tearing mode are investigated by global kinetic/MHD hybrid simulations in a low beta tokamak plasma. kinetic counter circulating from the non-adiabatic response found to be strongly destabilizing while adiabatic stabilizing. net effect with both and contributions is destabilizing. On other hand, co-circulating calculated weakly stabilizing corresponding contribution for small ion beta. dependence beta, gyroradius, speed studied systematically...
In the last few years, long-pulse H-mode plasma discharges (with small edge-localized modes and normalized beta, βN ~ 1) have been realized at Experimental Advanced Superconducting Tokamak (EAST). This paper reports on high-βN (>1.5) in 2015 EAST campaign. The characteristics of these plasmas presented a database. Analysis experimental limit has revealed several main features typical discharges. Firstly, efficient, stable high heating power is required. Secondly, control impurity radiation...
An imaging neutral particle analyzer (INPA) has been successfully designed and implemented in the Experimental Advanced Superconducting Tokamak to detect fast ions (FIs). The system capitalizes on carbon foils ionize charge exchange particles utilizes scintillator screens differentiate energy radial distribution of particles. detection characteristics pitch angle profile resolution are illustrated, modeling-based calibration validated with experimental data. Furthermore, FI redistribution...
Abstract Energetic ions (EIs) are responsible for driving most meso-scale Alfvenic instabilities, and can also couple with micro-scale turbulence macro-scale MHD modes driven by bulk plasmas. In this work, we demonstrate the extension of gyrokinetic EI capability MAS code (Bao et al 2023 Nucl. Fusion 63 076021) that treats plasma instabilities different temporal-spatial scales polarizations on same footing 5-field Landau-fluid model, which then form a comprehensive Landau fluid-gyrokinetic...
Abstract We review the physics of energetic particles (EPs) in magnetically confined burning fusion plasmas with focus on advances since last update ITER Physics Basis (Fasoli et al 2007 Nucl. Fusion 47 S264). Topics include basic EP physics, generation, diagnostics EPs and instabilities, interaction thermal plasma EP-driven particle modes (EPMs), turbulence, linear nonlinear stability simulation instabilities EPMs, 3D effects, scenario optimization strategies based phase-space control,...
Abstract In tokamak plasmas, tangential neutral beam injection (NBI) produces (a large fraction of) circulating energetic ions (CEIs) and induces plasma toroidal rotation, both of which play an important role in the stability tearing mode (TM). this study, effect NBI on TM is systematically investigated using kinetic-magnetohydrodynamic hybrid code M3D-K. Here, modeled as combined effects CEI rotation. The analysis focuses dependency NBI's key physical parameters, including magnetic shear,...
Abstract The drift wave instability under the dip of temperature profile is studied. It found that ubiquitous mode (UM) triggered by a positive electron gradient, while trapped (TEM) negative gradient. threshold gradient amplitude for UM excitation lower than TEM, which consistent with recent experimental results from EAST. Compared exhibits several distinct properties: it becomes more important and dominant in short-wavelength regime; its depends on ion density gradient; significantly...
Abstract In addition to their effect on the linear stability of tearing modes, energetic particles can influence nonlinear evolution a magnetic island through an uncompensated cross field current due charge separation when orbit width particle is much larger than width. The corresponding return parallel may compensate loss bootstrap in island. This depends island’s propagation frequency (the rotation relative plasma), density gradient ions and shear. If positive, plays stable role...
In this paper, a carbon dot hydrogel composite (CDs-Hy) capable of efficiently removing Pb(II) was prepared by hydrogen bonding self-assembly in combination with dots and hydrogel. CDs-Hy characterized scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron (XPS), the effect adsorption conditions on efficiency studied. The results study showed that incorporation dots, one hand, significantly increased capacity material. On other it can...
An extended magnetohydrodynamic model including the effect of runaway current is developed and implemented in M3D code. Based on this model, a simulation has been carried out to investigate linear stability nonlinear evolution n = 1 resistive kink mode presence current. It found that sawteeth oscillation suppressed plasma. The only leads single sawtooth crash before reaching new steady state axi-symmetric equilibrium with flattened profile plasma core q(0)>1.
We report the fabrication and testing of ultrafast response nonenzymatic glucose sensor based on use interlaced chain structure Au@CuS nanomaterial. The new nanomaterial was synthesized by a facile solvothermal method from L-cysteine、Cu(NO 3 ) 2 ·3H O Au Seeds without using additional surfactants or templates. combination CuS solves problems poor electrical conductivity susceptibility to toxicity, while exposes more active sites facilitate diffusion molecules with low resistance increase...
In a strongly magnetized plasma, where the particles' thermal gyro-radii are smaller than Debye length, magnetic field greatly affects plasma's relaxation processes. The expressions for time rates of change electron and ion parallel perpendicular temperatures obtained calculated analytically small anisotropies through considering binary collisions between charged particles in presence uniform by using perturbation theory. Based on these expressions, effects anisotropic due to...
Alfvén eigenmodes in up-down asymmetric tokamak equilibria are studied by a new magnetohydrodynamic eigenvalue code. The code is verified with the NOVA for Solovév equilibrium and then used to study of Experimental Advanced Superconducting Tokamak. frequency mode structure toroidicity-induced calculated. It demonstrated numerically that asymmetry induces phase variation eigenfunction across major radius on midplane.
A magnetic field greatly affects the relaxation phenomena in a plasma when particles’ thermal gyro-radii are smaller than Debye length. Its influence on temperature (TR) is investigated through consideration of binary collisions between charged particles presence uniform within perturbation theory. The times calculated. It shown that electron-electron (e-e) and ion-ion (i-i) TR rates first increase then decrease as grows, doubly logarithmic term contained electron-ion (e-i) rate results from...
A new branch of the m/n = 2/1 fishbone-like mode is found to be excitated by trapped energetic ions when tearing unstable. An energy-principle-based dispersion relation derived and analyzed, which incorporates wave-particle resonance resistive layer physics. Once beta amplitude exceeds a critical value, instabilities would appear. The transition from will triggered with increasing ions. total effects ideal magnetohydrodynamic potential energy adiabatic contribution on real frequency growth...
Abstract The localized coupling among geodesic acoustic mode (GAM), tearing modes (TMs) and twin counter-propagating beta-induced Alfvén eigenmodes (BAEs) waves has been investigated in the experimental advanced superconducting tokamak. Before appearance of TMs, typical continuous GAM is observed through multi-channel Doppler backscattering (DBS) diagnostic. BAEs can be excited after burst magnetic islands, which are to q = 4 rational surface that confirmed by measurement DBS array, where...
The influence of trapped energetic ions (TEIs) on m/n=2/1 low-frequency magnetohydrodynamic (MHD) instabilities with reversed shear profile is investigated by a global kinetic–MHD hybrid simulation. For low energetic-ion beta, TEIs have stabilizing effect the double tearing mode (DTM). When beta larger than threshold, an energetic-particle-driven mode, fishbone-like (FLM), excited; that is, transition from DTM to FLM occurs. threshold increases increasing resistivity, and growth rate reduced...