A5021319215- Magnetic confinement fusion research
- Fusion materials and technologies
- Laser-Plasma Interactions and Diagnostics
- Ionosphere and magnetosphere dynamics
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Plasma Diagnostics and Applications
- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Physics of Superconductivity and Magnetism
- Seismic Waves and Analysis
- Metal and Thin Film Mechanics
- Dust and Plasma Wave Phenomena
- Plasma Applications and Diagnostics
- Underwater Acoustics Research
- Rice Cultivation and Yield Improvement
- Magnetic Field Sensors Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Agricultural Science and Fertilization
- Seismic Imaging and Inversion Techniques
- Solar and Space Plasma Dynamics
- Membrane Separation and Gas Transport
- Soil Carbon and Nitrogen Dynamics
- Metal-Organic Frameworks: Synthesis and Applications
Nanjing University
2025
Chinese Academy of Sciences
2015-2024
Institute of Plasma Physics
2015-2024
Southwest Jiaotong University
2023-2024
Jilin Agricultural University
2024
Shenzhen University
2022-2023
Hefei Institutes of Physical Science
2023
University of Chinese Academy of Sciences
2017-2022
University of South China
2021
University of Saskatchewan
2015
Abstract Porous liquids (PLs) have emerged as a promising class of flow porous materials, offering distinctive benefits for sustainable separation processes coupled with catalytic transformations in the chemical industry. Despite their potential, challenges remain realms synthesis complexity, stability, and strategic engineering sites. In this study, scalable mechanochemical synthetic approach is reported to fabricate Type III PLs from solid precursors high stability. these PLs, ZIF‐8...
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...
A stationary edge-localized mode (ELM)-absent H-mode regime, with an electrostatic edge coherent (ECM) which resides in the pedestal region, has been achieved EAST tokamak recently. This regime allows operation of a nearly fully noninductive long pulse (>15 s), exhibiting relatively high and good global energy confinement near 1.2, excellent impurity control. Furthermore, this is mostly obtained 4.6 GHz lower hybrid current drive (LHCD) or counter-current neutral beam injection (NBI), plus...
Abstract It is necessary to achieve simultaneous exhaust of excessive transient and steady-state heat fluxes on the divertor target for protection in future fusion reactors. The sustained large ELM control stable partial detachment have been achieved concurrently with argon (Ar) or neon (Ne) seeding EAST. With Ne seeding, ELMs frequency f ∼ 100 Hz disappear a ELM-free state H 98, y 2 > 1 maintained. Meanwhile, electron temperature T et around lower outer strike point decreases from more...
Abstract A series of high-frequency ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mn>400</mml:mn> <mml:mo>∼</mml:mo> <mml:mn>1000</mml:mn> <mml:mrow> <mml:mtext> kHz</mml:mtext> </mml:mrow> </mml:math> ) bursting core-localized Alfvén instabilities have been observed during ohmic discharges in EAST tokamak. The instability trigger favours the discharge conditions low toroidal magnetic field and electron density. mode numbers are mainly <mml:mi>n</mml:mi>...
The fast electron flux driven by Lower Hybrid Wave (LHW) in the scrape-off layer (SOL) EAST is analyzed both theoretically and experimentally. five bright belts flowing along magnetic field lines SOL hot spots at LHW guard limiters observed charge coupled device infrared cameras are attributed to flux, which directly measured retarding analyzers (RFA). current carried ranging from 400 6000 A/m2 direction opposite plasma current, scanned radial limiter surface position about 25 mm beyond...
One of the critical challenges for long pulse operation ITER and future fusion reactors is excessively high heat particle fluxes on divertor targets. The detachment offers an effective way control steady state flux erosion at target. Dedicated experiments have been systematically performed both H-mode L-mode plasmas EAST with ITER-like W in last two years to further advance physics understanding. identified by rollover peak near strike point during density ramping up, which correlates...
Abstract A novel electromagnetic probe array (EMPA) diagnostic, which consists of a magnetic and an electrostatic array, has recently been developed on EAST. The EMPA is fixed near the first wall at horizontal port P. 24 identical probes, each them capable measuring toroidal, poloidal radial fluctuations simultaneously, providing additional toroidal fluctuation measurements compared with regular probes With higher sampling rate self-resonant frequency, can provide frequency measurements....
Abstract One critical issue in steady-state and high-performance operation future tokamak fusion reactors is to develop H-mode operational regimes that mitigate or eliminate the large-amplitude ELMs decrease transient heat flux on divertor first wall. This paper reviews recent advances extending understanding access sustainment of natural impurity-induced small/no-ELM EAST. Highly reproducible stationary grassy ELM regime with good energy confinement excellent tungsten impurity exhaust...
Abstract One of the key challenges for future fusion research is to mitigate high steady-state heat load on divertor target plates, and detachment offers a promising solution. The Experimental Advanced Superconducting Tokamak (EAST) has developed several feedback control methods detachment. However, when an off-normal event momentarily disturbs main plasma, impurity seeding may still be conducted by these detachment, which probably drives plasma further away from its stable equilibrium or...
In this paper, we will experimentally investigate the power threshold (PL-H) in upper single null plasmas with an ITER-like tungsten divertor under different ∇B drift directions on EAST [F. Ding et al., Commissioning and PSI Behavior of ITER-Like W/Cu Divertor 22nd PSI, Rome (2016)]. The for low (L) to high (H) confinement mode has a clear positive toroidal magnetic field, BT, dependence when points toward primary X-point (B×∇B↑). A factor 2–3 increase PL-H is observed away from (B×∇B↓)....
A multi-energy soft x-ray (ME-SXR) diagnostic has been built for electron temperature profile in the edge plasma region Experimental Advanced Superconducting Tokamak (EAST) after two rounds of campaigns. Originally, five preamplifiers were mounted inside EAST vacuum vessel chamber attached to vertically stacked compact diode arrays. custom mechanical structure was designed protect detectors and electronics under constraints tangential field view allocation space. In next experiment,...
A two-dimensional symmetric fluid model is established to study the influence of radio frequency (RF) wave driving on capacitively coupled plasma discharge. The relationship between and electron density obtained by solving energy balance equation. calculation results show that average first increases rapidly with increase in then gradually tends saturation at a threshold frequency. simulation also carried out, which provides similar results. Physical studies this phenomenon are conducted,...
Soil salinization is a severe environmental problem that restricts crop productivity. Straw amendment could increase the fertility of saline–sodic soils by improving soil physical properties and carbon sequestration; however, chemical mechanism saline improvement via straw reclamation not clear. This study aimed to investigate effects return with nitrogen fertilizer on leaching characteristics, rice organ ion concentrations, yield. Therefore, column experiment was conducted in 2021 Baicheng,...
Increasing the density in a tokamak is limited by so-called limit, which generally performed as an appearance of disruption causing loss plasma confinement, or degradation high confinement mode could further lead to H → L transition. The L-mode and H-mode limit has been investigated EAST tokamak. Experimental results suggest that limits be triggered either edge cooling excessive central radiation. cooling, leads current profile shrinkage then destabilizes 2/1 tearing mode, ultimately...
Correlations between the edge fluctuations and pedestal evolution during relatively large localized mode (ELM) cycles at high normalized electron collisionality (νe,ped* &gt; 1) on EAST tokamak are investigated. Not only electrostatic coherent (ECM, ∼50 kHz) low frequency magnetic (MCM, ∼32 but also a electromagnetic (HFM, &gt;150 observed to be coexisting ELMs. After ELM crash, temperature recovered faster than density. It is found that saturation of ECM coincides more with density,...
Abstract Upstream density profiles in the scrape-off layer (SOL) have been examined low-confinement mode (L-mode) and high-confinement (H-mode) plasmas EAST superconducting tokamak. A weak shoulder forms near SOL region upper single-null configurations when neutral pressure measured at lower divertor exceeds a threshold value of 2 × 10 −2 Pa L-mode plasmas. When is below this threshold, absent sidebands hybrid waves associated with parametric instabilities are reduced. Active detachment...
Improvements in the H-mode pedestal pressure and global energy confinement were observed on DIII-D with both 3 6 MW of neutral beam (NBI) heating neon injection. The increased, primarily associated a significant increase density relatively smaller decrease temperature. At same injection rate, rapid edge localized mode (ELM) frequency ~35% plasma stored discharge, while ELM was gradually decreased increased by up to 20%. measured widths from discharges matched EPED1.0 width scaling, ΔΨN...
A new model for the edge harmonic oscillations (EHOs) in quiescent H-mode regime has been developed, which successfully reproduces recent observations DIII-D tokamak. In particular, at high E × B flow shear only a few low-n kink modes remain unstable plasma edge, consistent with EHO behavior, while low shear, mode spectrum is significantly broadened, broadband electromagnetic turbulence behavior. The based on mechanism destabilizing kink/peeling by underlies EHOs, separately from previously...
One challenge in long-pulse and high performance tokamak operation is to control the edge localized modes (ELMs) reduce transient heat load on plasma facing components. Minute-scale discharges H-mode have been achieved repeatedly Experimental Advanced Superconducting Tokamak (EAST) since 2016 campaign understanding characteristics of ELMs these can be helpful for effective ELM discharges. The kinetic profile diagnostics recently developed EAST make it possible perform pedestal stability...
Abstract Linear and nonlinear simulations are carried out for the edge coherent mode (ECM) using global gyrokinetic code GEM based on EAST experimental parameters. The linear simulation results show that ECM is an electrostatic with dominant toroidal number n = 18 frequency about 48 kHz, propagates along direction of electron diamagnetic drift, which consistent results. In addition, density temperature gradients destabilize mode, while collision stabilizes mode. saturated particle heat...
Abstract Various edge low-frequency fluctuations with distinct characteristics exist in different detached divertor states. Three ( <?CDATA $\,f < $?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>f</mml:mi> <mml:mo><</mml:mo> </mml:math> 10 kHz), namely quasi-coherent fluctuation (LFCF), broadband frequency (LFBF), and low- n X-point mode (LNXM) on Experimental Advanced Superconducting Tokamak (EAST), are systematically assessed. The basic features...
A new edge tangential multi-energy soft x-ray (ME-SXR) diagnostic with high temporal (≤ 0.1 ms) and spatial (∼1 cm) resolution has been developed for a variety of physics topics studies in the EAST tokamak plasma. The fast electron temperature profile (approximately from to scrape-off layer) is investigated using ME-SXR system. data process was performed by ideal 'multi-foil' technique, no priori assumptions plasma profiles. Reconstructed emissivity profiles experimental scenarios are...