A5108673674- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Ionosphere and magnetosphere dynamics
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Cosmology and Gravitation Theories
- Greenhouse Technology and Climate Control
- Plasma Diagnostics and Applications
- Black Holes and Theoretical Physics
- Light effects on plants
- Solar Thermal and Photovoltaic Systems
- Nuclear reactor physics and engineering
- Solar and Space Plasma Dynamics
- Dust and Plasma Wave Phenomena
- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Plant Water Relations and Carbon Dynamics
- Pulsars and Gravitational Waves Research
- Thermal Radiation and Cooling Technologies
- Laser-induced spectroscopy and plasma
- Semiconductor materials and devices
- Silicon Carbide Semiconductor Technologies
- Engineering Applied Research
- Gyrotron and Vacuum Electronics Research
Shanghai University of Electric Power
2025
University of Shanghai for Science and Technology
2025
Shenyang Agricultural University
2021-2024
Chinese Academy of Sciences
2015-2024
Institute of Plasma Physics
2015-2024
Hefei Institutes of Physical Science
2019-2024
Ningxia University
2024
Kunming University
2023
Wuhan University
2022
Lawrence Livermore National Laboratory
2012-2019
The EAST research program aims to demonstrate steady-state long-pulse advanced high-performance H-mode operations with ITER-like poloidal configuration and RF-dominated heating schemes. Since the 2014 IAEA FEC, has been upgraded all ITER-relevant auxiliary current drive systems, enabling investigation of plasma profile control by coupling/integration various combinations. Fully non-inductive (H 98,y2 > 1.1) was extended over 60 s for first time sole RF plus good power coupling impurity...
Since the last IAEA-FEC in 2016, EAST physics experiments have been developed further support of high-performance steady-state operation for ITER and CFETR.First demonstration >100 seconds time scale long-pulse scenario with a good plasma performance (H98(y2) ~ 1.1) control impurity heat exhaust upper tungsten divertor has achieved on using pure radio frequency (RF) power heating current drive.The operational domain significantly extended towards more CFETR related high beta regime (βP ~2.5...
The simulations on edge-localized modes (ELMs) with six-field peeling–ballooning (P–B) using the BOUT++ code are reported in this paper. This model based full Braginskii equations developed to simulate self-consistent turbulence and transport between ELMs. Through comparison previous three-field two-fluid model, P–B instability, ion diamagnetic effects, resistivity hyper-resistivity found be dominant physics during additional physics, such as acoustic waves, thermal conductivities, Hall...
The BOUT + code has been used to simulate edge plasma electromagnetic (EM) turbulence and transport, study the role of EM in setting scrape-off layer (SOL) heat flux width λq. More than a dozen tokamak discharges from C-Mod, DIII-D, EAST, ITER CFETR have simulated with encouraging success. parallel electron fluxes onto target simulations EAST follow experimental scaling inverse dependence on poloidal magnetic field. Further statistics analysis shows that blobs are generated near pedestal...
The E × B shear flow plays a dual role on peeling-ballooning modes and their subsequently triggered edge localized mode (ELM) crashes. On one hand, the can stabilize high-n twist in poloidal direction, constraining mode's radial extent reducing size of corresponding ELM. other also introduces Kelvin-Helmholtz drive, which destabilize modes. overall effect equilibrium ELM crashes depends competition between these two effects. When is either small or very large, it reduce size. However, for...
BOUT++ is a 3D nonlinear finite-difference plasma simulation code, capable of solving quite general systems Partial Differential Equations (PDEs), but targeted particularly on studies the edge region tokamak plasmas. publicly available, and has been adopted by growing number researchers worldwide. Here we present improvements which have made to code since its original release, both in terms structure capabilities. Some recent applications these methods are reviewed, areas active development...
In order to study the distribution and evolution of transient particle heat fluxes during edge-localized mode (ELM) bursts, a BOUT++ six-field two-fluid model based on Braginskii equations with non-ideal physics effects is used simulate pedestal collapse in divertor geometry. The profiles from DIII-D H-mode discharge #144382 fast target flux measurements are as initial conditions for simulations. A flux-limited parallel thermal conduction three values flux-limiting coefficient , free...
Abstract Since the last IAEA-Fusion Energy Conference, Experimental Advanced Superconducting Tokamak (EAST) research program has been, in support of ITER and CFETR, focused on development terms long-pulse steady-state (fully noninductive) high beta H-mode scenario with active controls stationary transient divertor heat particle fluxes. The operational domain plasma been significantly extended ITER-like tungsten mono-block divertor, control heating schemes. EAST achieved several important...
By analyzing large quantities of discharges in the unfavorable ion B ×∇B drift direction, I-mode operation has been confirmed EAST tokamak.During L-mode to transition, energy confinement a prominent improvement by formation high-temperature edge pedestal, while particle remains almost identical that L-mode.Similar with observation on other devices, E r profiles obtained eight-channel Doppler backscattering system (DBS8) [1] show deeper well than L-mode.And weak coherent mode (WCM) frequency...
In this report, we introduce Qwen2.5, a comprehensive series of large language models (LLMs) designed to meet diverse needs. Compared previous iterations, Qwen 2.5 has been significantly improved during both the pre-training and post-training stages. terms pre-training, have scaled high-quality datasets from 7 trillion tokens 18 tokens. This provides strong foundation for common sense, expert knowledge, reasoning capabilities. post-training, implement intricate supervised finetuning with...
In this study, Large Eddy Simulation (LES) has been employed to examine the influence of Froude number (Fr) on linearly stratified wake and internal waves behind a sphere at subcritical Reynolds Re = 3700. Six distinct sets models with varying Fr (Fr 0.05, 0.25, 0.5, 1, 2, ∞) have chosen establish density linear stratification through use User Defined Function (UDF). The analysis focuses impact characteristics, velocity distribution, structure within flow. It is evident that plays pivotal...
This paper reports on the theoretical and simulation results of a gyro-Landau-fluid extension BOUT++ code, which contributes to increasing physics understanding edge-localized-modes (ELMs). Large ELMs with low-to-intermediate-n peeling-ballooning (P-B) modes are significantly suppressed due finite Larmor radius (FLR) effects when ion temperature increases. For type-I ELMs, it is found from linear simulations that retaining complete first order FLR corrections as resulting incomplete...
The impact of a large density gradient on edge-localized modes (ELMs) is studied linearly and nonlinearly by employing both two-fluid gyro-fluid simulations. In simulations, the ion diamagnetic stabilization high-n disappears when taken into account. But simulations show that finite Larmor radius (FLR) effect can effectively stabilize modes, so alone not sufficient to represent FLR stabilizing effect. We further demonstrate additional gyroviscous terms must be kept in model recover linear...
The BOUT++ code has been exploited in order to improve the understanding of role turbulent modes controlling edge transport and resulting scaling scrape-off layer (SOL) heat flux width. For C-Mod enhanced (EDA) H-mode discharges, six-field two-fluid nonlinear simulations show a reasonable agreement upstream turbulence divertor target behavior: (a) simulated quasi-coherent consistent characteristics frequency versus poloidal wave number spectra electromagnetic fluctuations when compared with...
This paper presents heat flux simulations for the ELMy H-mode on Experimental Advanced Superconducting Tokamak (EAST) using a six-field two-fluid model in BOUT++. Three EAST discharges with different plasma currents I p and geometries are studied. The trend of scrape-off layer width is reproduced by simulation. simulated only half that derived from scaling law, but agrees well international multi-machine law. Note there no radio-frequency (RF) heating scheme simulations, RF can change...
Spatial heterogeneity or non-stationarity has become a popular and necessary concern in exploring relationships between variables. In this regard, geographically weighted (GW) models provide powerful collection of techniques its quantitative description. We developed user-friendly, high-performance systematic software, named GWmodelS, to promote better broader usages such models. Apart from variety GW models, including descriptive statistics, regression principal components analysis, data...
Time-dependent transport of both plasma and neutrals is simulated during supersonic molecular beam injection (SMBI) yielding the evolution edge neutral profiles. The SMBI model included as a module, called trans-neut, within original BOUT++ boundary turbulence code. Results calculations are reported for realistic divertor geometry HL-2A tokamak. can also be used to study effect gas puffing. A seven-field fluid couples density, heat, momentum equations together with density molecules atoms....