A5104111387- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Astrophysics and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Fluid Dynamics and Turbulent Flows
- Computational Fluid Dynamics and Aerodynamics
- Superconducting Materials and Applications
- Dust and Plasma Wave Phenomena
- Advanced NMR Techniques and Applications
- Earthquake Detection and Analysis
- Fault Detection and Control Systems
- Plasma Diagnostics and Applications
- Nuclear physics research studies
- Heat and Mass Transfer in Porous Media
- Educational Technology and Pedagogy
- Particle physics theoretical and experimental studies
- Inorganic Fluorides and Related Compounds
- History and Developments in Astronomy
- Meteorological Phenomena and Simulations
- Nuclear Engineering Thermal-Hydraulics
- Dark Matter and Cosmic Phenomena
Guangzhou Huali College
2024
Southwestern Institute of Physics
2010-2023
Nanjing Normal University
2020
Institute of Theoretical Physics
2020
The β-induced Alfvén eigenmode (BAE) excited by energetic electrons has been identified for the first time both in Ohmic and electron cyclotron resonance heating plasma HL-2A. features of instability, including its frequency, mode number, propagation direction, can be observed magnetic pickup probes. frequency is comparable to that continuum accumulation point lowest gap induced shear continuous spectrum due finite β effect, it proportional velocity at thermal ion held constant. experimental...
Abstract Ion internal transport barriers (iITBs) are first observed in neutral beam injection (NBI) heated plasmas at the HL-2A tokamak. The position of barrier foot, stationary state, coincides with q = 1 surface within its uncertainty measurement. iITBs can develop more easily beginning NBI heating. Also, unstable for sawtooth plasma. Simulations reveal that thermal diffusivity ions ( χ i ) inside be as low neoclassical level. It is flow shear iITB state reaches level required suppressing...
Blob statistical characteristics across the separatrix of HL-2A tokamak plasma have been studied using a reciprocating Langmuir five-probe array. The radial profile inverse pressure gradient scale length has maximum just inside last closed flux surface (LCFS), where skewness is close to zero. Conditional average reveals that density holes and blobs are produced LCFS they propagate in opposite directions. poloidal velocity changes its sign when it separatrix, which consistent with E × B drift...
A new scintillator-based lost fast-ion probe (SLIP) has been developed and operated in the HL-2A tokamak [L. W. Yan, X. R. Duan, T. Ding, J. Q. Dong, Yang, Yi Liu, L. Zou, D. M. Xuan, Y. Chen, Rao, Song, Huang, C. Mao, Wang, Li, Z. Cao, B. G. Lei, H. Zhang, Cui, Deng, Feng, Gao, Han, Hong, Ji, Kang, F. Kong, Lan, S. Qing A. Luo, Pan, Peng, Shi, Sun, K. Xiao, Xie, Yao, Yu, Yuan, Zhao, Zhong, Zhou, Team, Nucl. Fusion 51, 094016 (2011)] to measure losses of neutral beam ions. The design is...
In this work, we study possible hidden-bottom molecular pentaquarks $P_b$ from coupled-channel $\Sigma^{(*)}_bB^{(*)}-\Lambda_bB^{(*)}$ interaction in the quasipotential Bethe-Salpeter equation approach. isodoublet sector with $I=1/2$, same reasonable parameters produces seven states, a state near $ \Sigma_bB$ threshold spin parity $J^P=1/2^-$, $\Sigma^*_bB$ $3/2^-$, two states $\Sigma_bB^*$ $1/2^-$ and three $\Sigma_b^*B^*$ $1/2^-$, $5/2^-$. The results suggest that $\Sigma_b^* B^*$...
The stability and performance of tokamak plasmas are routinely limited by various magneto-hydrodynamic instabilities, such as neoclassical tearing modes (NTMs). This paper presents a rather simple method to control the NTMs in real time (RT) on tokamak, including principle feedback approach for RT suppression stabilization NTMs. system combines Mirnov, electron cyclotron emission, soft X-ray diagnostics used determining NTM positions. A methodology fast detection 2/1 or 3/2 positions with...
Abstract Recently, a new structure Y (4626) was reported by the Belle Collaboration in process $$e^+e^-\rightarrow D_s^+D_{s1}(2536)^-$$ <mml:math...
Abstract The divertor biasing technique offers a promising alternative to control the edge localized mode (ELM) as well heat load in tokamaks, compared resonant magnetic perturbation (RMP) generated by coils. linear resistive MHD code MARS-F (Liu et al 2000 Phys. Plasmas 7 3681) is employed study plasma response n = 2 ( toroidal number) field HL-2A, produced current filaments flowing scrape-off layer region. due currents with RMP utilized for ELM HL-2A. strength of radial perturbation, 100 A...
In this article, a Bayesian tomography method using non-stationary Gaussian process for prior has been introduced. The formalism allows quantities which bear uncertainty to be expressed in the probabilistic form so that of final solution can fully resolved from confidence interval posterior probability. Moreover, consistency check performed by checking whether misfits between predicted and measured data are reasonably within an assumed error. particular, accuracy reconstructions is...
Abstract The impact of the mass isotope on plasma confinement and transport properties has been investigated in Ohmically-heated hydrogen deuterium plasmas HL-2A tokamak. Experimental results show that under similar discharge parameters better lower turbulent than one, concomitantly, it is found magnitude geodesic acoustic mode zonal flows, tilting angle Reynolds stress tensor turbulence correlation lengths are all larger edge region plasma. provide direct experimental evidence importance...
Abstract The influence of energetic particles (EPs) on the ideal internal kink mode, in rotating tokamak plasmas, is numerically investigated by simultaneously solving MHD-kinetic hybrid equations together with a toroidal momentum balance equation utilizing MARS-Q code (Liu et al 2013 Phys. Plasmas 20 042503). neoclassical viscous (NTV) torque, induced precessional drift resonances trapped particles, acts as sink term to damp plasma flow. Quasi-linear initial value simulations show local...
Abstract In this work, the coupling among several MHD modes across different spatial regions, including neoclassical tearing mode (NTM) and two branches of Alfvén eigenmode (AE) in core edge localized (ELM), has been investigated HL-2A high beta H-mode plasmas. The NTMs induce a saturated m / n = 1/1 helical ( are poloidal toroidal numbers, respectively) through ‘magnetic-flux pumping’ effect. ELM crash results rapid (<1 ms) decrease NTM island width followed by much slower recovery....
Disruption prediction and mitigation is a crucial topic, especially for future large-scale tokamaks, due to disruption’s concomitant harmful effects on the devices. On this disruption algorithm takes responsibility give accurate trigger signal in advance of disruptions, therefore system can effectively alleviate effects. In past 5 years, deep learning-based developed HL-2A tokamak. It reaches true positive rate 92.2%, false 2.5% total accuracy 96.1%. Further research implemented basis solve...
In this paper, we are concerned with physical aspects of three-dimensional Richtmyer‐Meshkov instability (RMI) and resulting turbulent mixing phenomena in a convergent geometry. A system two fluids, heavy gas (sulfur hexafluoride, SF6) enclosed by light (helium, He), is initially separated randomly perturbed interfaces. An artificial feature imposed at the outer surface these interfaces to enunciate presence macroscopic perturbation. Numerical results obtained from TURMOIL3D simulations...