A5101500672- Magnetic confinement fusion research
- Fusion materials and technologies
- Ionosphere and magnetosphere dynamics
- Superconducting Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Particle accelerators and beam dynamics
- Nuclear reactor physics and engineering
- Plasma Diagnostics and Applications
- Physics of Superconductivity and Magnetism
- Solar and Space Plasma Dynamics
- Laser-induced spectroscopy and plasma
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Geomagnetism and Paleomagnetism Studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Tropical and Extratropical Cyclones Research
- Dust and Plasma Wave Phenomena
- Cardiomyopathy and Myosin Studies
- Fluid Dynamics and Turbulent Flows
- Receptor Mechanisms and Signaling
- Advanced Materials Characterization Techniques
- Quantum, superfluid, helium dynamics
- High-pressure geophysics and materials
- Recommender Systems and Techniques
Hebei Medical University
2025
Shandong Agricultural University
2025
Chinese Academy of Sciences
2015-2024
Shanxi University
2024
Hefei Institutes of Physical Science
2020-2024
Czech Academy of Sciences, Institute of Plasma Physics
2024
Institute of Plasma Physics
2014-2023
Max Planck Institute for Plasma Physics
2017
University of Science and Technology of China
2016
Johns Hopkins University
2015
Mastering nuclear fusion, which is an abundant, safe, and environmentally competitive energy, a great challenge for humanity. Tokamak represents one of the most promising paths toward controlled fusion. Obtaining high-performance, steady-state, long-pulse plasma regime remains critical issue. Recently, big breakthrough in steady-state operation was made on Experimental Advanced Superconducting (EAST). A with world-record pulse length 1056 s obtained, where density divertor peak heat flux...
A critical challenge facing the basic long-pulse high-confinement operation scenario ($H$ mode) for ITER is to control a magnetohydrodynamic (MHD) instability, known as edge localized mode (ELM), which leads cyclical high peak heat and particle fluxes at plasma components. breakthrough made in Experimental Advanced Superconducting Tokamak achieving new steady-state $H$ without presence of ELMs duration exceeding hundreds energy confinement times, by using novel technique continuous real-time...
Abstract As an alternative choice of solid plasma facing components (PFCs), flowing liquid lithium can serve as a limiter or divertor PFC and offers self-healing surface with acceptable heat removal good impurity control. Such system could improve performance, therefore be attractive for future fusion devices. Recently, continuously (FLiLi) has been successfully designed tested in the EAST superconducting tokamak. A circulating layer thickness <0.1 mm flow rate ~2 cm 3 s −1 was achieved....
Abstract Small perturbations and strong impurity exhaust capability associated with the small grassy ELMs render grassy-ELM regime a suitable candidate for achieving steady-state H-mode operation radiative divertor, especially in metal-wall device, such as Experimental Advanced Superconducting Tokamak (EAST). As degradation of pedestal performance excessive divertor seeding or accumulation tends to be accompanied significantly increased radiation near X point, feedback control absolute...
A type of silicon detector known as AXUV (absolute extreme ultraviolet) photodiodes is successfully used to measure the radiated power in EAST. The characterized by compact structure, fast temporal response (<0.5 s) and flat spectral sensitivity range from ultra-violet X-ray. Two 16-channel arrays are installed EAST view whole poloidal cross-section plasma. Based on diagnostic system, typical radiation distributions for both limiter divertor plasma obtained compared. As detachment occurs,...
Heat and particle loads on the plasma facing components are among most challenging issues to be solved for a reactor design. Alternative magnetic configurations may enable tokamak operation with lower peak heat load than standard single null (SN) divertor. This papers reports creation control of one such alternatives: two-null nearby divertor configuration. An important element this study is that was produced large superconducting as an experimental advanced tokamak. A preliminary experiment...
A 4.6 GHz lower-hybrid current drive (LHCD) system has been firstly commissioned in EAST the 2014 campaign. The first LHCD results with show that LHW can be coupled to plasma a low reflection coefficient, and rotation, modify profile, heat effectively. By means of configuration optimization local gas puffing near antenna, good LHW–plasma coupling coefficient less than 5% is obtained. maximum power up 3.5 MW. (CD) efficiency 1.1 × 1019 m−2 W−1 central electron temperature above 4 keV,...
Abstract A total power injection up to 0.3 GJ has been achieved in EAST long pulse H-mode operation of 101.2 s with an ITER-like water-cooled tungsten (W) mono-block divertor, which steady-state exhaust capability 10 MWm −2 . The peak temperature W target saturated at 12 the value T ~ 500 °C a heat flux ~3.3 MW m being maintained during discharge. By tailoring 3D divertor plasma footprint through edge magnetic topology change, load was broadly dispersed and thus sputtering were well...
EAST tokamak has been equipped with upper tungsten divertor since 2014. The accumulation often observed in NBI-heated H-mode discharges suggesting deleterious confinement the plasma core. It causes not only H-L back transition but also disruption several discharges. Suppression of is therefore most important issue to achieve a long pulse discharge. In order study behavior discharge, spectra have measured at 20–140 Å. density, nw, evaluated from intensity unresolved array (W-UTA) wavelength...
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...
Abstract The exhaust of excessively high heat and particle fluxes on the divertor target is crucial for EAST long-pulse operation. In recent experiments, stable partial energy detachment around upper outer strike point with H 98,y2 ∼ 1 was achieved either Ne or Ar seeding from divetor in single null configuration ITER-like tungsten divertor. With seeding, electron temperature ( T et,UOSP ) maintained at 5 eV, peak surface div,UO decreased significantly, material sputtering well suppressed....
Abstract Impurity seeding has been consistently demonstrated to facilitate plasma detachment, effectively reducing the amount of heat and particles reaching divertor targets. However, achieving maintaining a stable detached state requires precise, real-time monitoring rate. Current limitations in diagnostic accuracy reliance on manual adjustments hinder this process. Here, novel approach based deep learning is proposed assist detachment Experimental Advanced Superconducting Tokamak. This...
With the explosive growth of information on internet, personalized recommendation technology has become an important tool for helping users efficiently acquire information. However, existing spreading-based algorithms only consider user choices and fail to fully leverage potential relationships between items. Additionally, incomplete utilization item limits their application applicable scenarios, resulting in suboptimal performance practical applications. To address this issue, we propose a...
Abstract The formation of a static 3-Dimensional (3D) helically localized perturbation structure the Toroidal Alfv'en Eigenmode (TAE) is observed for first time under magnetic islands induced by Resonant Magnetic Perturbations (RMP) in tokamak plasmas. Before application RMP, TAE around 200 kHz excited Electron Cyclotron Resonance Heating (ECRH) Energetic Electrons (EEs). After n = 1 mode into helical area on flux surface, where toroidal number. We find strengthened near X points m/n=-3/1...
Abstract JOREK 3D non-linear magnetohydrodynamic (MHD) simulations with non-equilibrium impurity treatment of thermal quench (TQ) triggered by a massive neon gas in EAST L-mode disruptions are first presented. Neon impurities deposited at Ψ N ~ 0.7, followed asymmetrical parallel extension along magnetic lines driven self-consistent electrical field induced plasma cooling process. Both double-stage and single-stage TQ observed experiments reproduced through varying particle fluxes. In TQ,...
The active feedback control of radiated power to prevent divertor target plates overheating during long-pulse operation has been developed and implemented on EAST. radiation algorithm, with impurity seeding via a supersonic molecular beam injection (SMBI) system, shown great success in both reliability stability. By sequence short neon (Ne) pulses the SMBI from outer mid-plane, bulk plasma can be well controlled, duration radiative (feedforward feedback) is 4.5 s discharge 10 s. Reliable...
Abstract Extreme ultraviolet (EUV) spectra emitted from iron and copper ions in a range of 8–500 Å molybdenum 8–400 were measured Experimental Advanced Superconducting Tokamak (EAST) discharges accompanied with spontaneous sputtering events, by which metallic impurity influxes are suddenly increased the discharge. Several spectral lines L-, M-, N-shell partially ionized have been successfully observed two EUV spectrometers named EUV_Short EUV_Long working wavelength ranges 8–130 20–500 Å,...
A stationary, high-performance grassy edge-localized mode (ELM) regime has been successfully accessed on the EAST tokamak since 2016 campaign. increase via of heating power or q95 are both found to facilitate a higher ELM frequency. Edge measurement absolute extreme ultraviolet radiation indicates that affected area by ELMs is localized at pedestal region and perturbations there induced can be 90% smaller than type-I ELMs. Parameter scan demonstrates good density control capacity, access...
Abstract Extreme ultraviolet (EUV) spectra emitted from low- Z impurity ions in the wavelength range of 10–500 Å were observed Experimental Advanced Superconducting Tokamak (EAST) discharges. Several spectral lines K- and L-shell partially ionized successfully with sufficient intensities resolutions for helium, lithium, boron, carbon, oxygen, neon, silicon argon using two fast-time-response EUV spectrometers which are absolutely calibrated based on intensity comparison method between visible...
Abstract For the problem of excessively high divertor heat flux, active impurity seeding is an effective method to radiate plasma energy reaching and thus achieve detachment. Neon a very radiation on many current tokamaks, which also candidate species be applied ITER. In EAST 2019 experimental campaign, series experiments were performed by mixture neon deuterium (Ne-D 2 ) for detachment core-edge-divertor integration in H-mode plasmas. The partial with high-confinement core has been achieved...