A5089256314- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Particle accelerators and beam dynamics
- Fusion materials and technologies
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Radiation Effects in Electronics
- Superconducting Materials and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- X-ray Spectroscopy and Fluorescence Analysis
- VLSI and Analog Circuit Testing
- Perovskite Materials and Applications
- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- Physics of Superconductivity and Magnetism
- Scientific Measurement and Uncertainty Evaluation
- Photodynamic Therapy Research Studies
- Graphite, nuclear technology, radiation studies
- Physical Unclonable Functions (PUFs) and Hardware Security
- Analytical Chemistry and Sensors
- Crystallography and Radiation Phenomena
- Dust and Plasma Wave Phenomena
- Ga2O3 and related materials
- Ion-surface interactions and analysis
- Quantum Dots Synthesis And Properties
Chinese Academy of Sciences
1998-2025
Institute of Plasma Physics
2022-2025
University of Science and Technology of China
2023-2025
University of Illinois Urbana-Champaign
2023-2024
Hefei Institutes of Physical Science
2022-2024
Czech Academy of Sciences, Institute of Plasma Physics
2024
University of Illinois System
2024
Institute of Modern Physics
2005
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...
Abstract Ion Cyclotron Range of Frequencies (ICRF) heating and Neutral Beam Injection (NBI) can have synergy due to the acceleration NBI beam ions by ICRF wave fields at their harmonics. To understand influence ICRF-NBI on fast ion distribution plasma performance, dedicated experiments TRANSP simulations been carried out EAST. The simulation results are consistent with experimental results. They show that not only accelerates energy lower than 80 keV larger 300 keV, but also generates fusion...
Mitigation of large edge-localized modes (ELMs) has been achieved by actively reducing the pedestal density gradient with EAST new right-angled lower divertor through changing strike point position from vertical target to horizontal target. A series dedicated experiments in 2021–2024 campaigns demonstrate that this ELM control solution is highly reproducible a broad parameter space edge safety factor q95 = 4.7–7.1, heating power Ptotal 2.3–5 MW, and collisionality νe,ped* 1–6, under both...
The use of Highly Oriented Pyrolytic Graphite (HOPG) reflectors is often proposed in the design X-ray Crystal Spectroscopy (XCS) diagnostic systems for next-generation tokamak devices, including ITER project. This study introduces an experimental based on X-Ray Diffractometry (XRD) method to evaluate performance HOPG reflectors. provides both angular responses and reflectivities A demonstrative XRD experiment conducted, details are introduced. enables precise studies reflectors, facilitating...
Abstract The decrease in tungsten (W) content with the higher ion cyclotron resonance heating (ICRH) power is observed and explained for first time a high injection (Pinj>10MW), performance (βN~2, βP~2.8, ne/nGW~80%, fBS~60%) H-mode discharge on experimental advanced superconducting tokamak (EAST). Unlike previous phenomenon of electron (ECRH) core W control (Shengyu Shi et al 2022 Nucl. Fusion 62 066031), there slight change background plasma temperature when ICRH applied, but toroidal...
Abstract We report observations of strong electron temperature profile stiffness in high poloidal beta (β_p~2) plasmas on EAST for the first time. Key features this regime include: (1) Negligible contributions to stored energy and from additional auxilliary heating power; (2) a rapid increase core broad-band turbulence (k_θ ρ_s~1-5,f~0-2000kHz) monitored by Collective Thomson Scatteing (CTS) diagnostic system. Notably, no significant impurities or MHD activities are observed during process....
Understanding the self-organized behaviour of particle confinement is critical for density control in magnetically confined thermonuclear fusion devices. This paper investigates spontaneous evolution peaking factor TEM turbulence-dominated ([Formula: see text]) H-mode plasma discharge, and relationship between broadband turbulence text] kHz) experimentally reported first time. In core region with higher pressure gradient lower collisionality text]), suppressed by [Formula: flow, which causes...
The Motional Stark Effect (MSE) diagnostic is one of the key methods for measuring current density distribution in magnetically confined fusion plasmas. On Experimental Advanced Superconducting Tokamak, a calibration system based on collaborative robot has been developed to enhance accuracy work during maintenance period. This robotic uses camera automatically capture observation sightlines and generates polarized light with an ∼0.5 mdeg. Additionally, it records MSE response at each angle...
Imaging and identifying target signatures biomedical markers in the ultraviolet (UV) spectrum is broadly important to medical imaging, military tracking, remote sensing, industrial automation. However, current silicon-based imaging sensors are fundamentally limited because of rapid absorption attenuation UV light, hindering their ability resolve spectral signatures. Here, we present a bioinspired sensor capable wavelength-resolved range. Inspired by UV-sensitive visual system Papilio xuthus...
Abstract Theory-based integrated modeling is validated against high-performance steady-state core plasmas on EAST in the high poloidal beta ( β p ) regime with only RF heating. Reasonably good agreement between results and experimental measurements obtained not for temperature profiles but also 11-chord line-integrated densities Faraday angles first time. This validation effort demonstrates that safety factor can be non-reversed experiments EAST. The inaccessibility LH waves observed...
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...
High-k turbulence (1 < kθρs 5) spectrograms have been directly measured in density modulation experiments of the EAST tokamak using collective Thomson scattering diagnostic system. Density-peaking is achieved Lower Hybrid Wave (LHW) experiments, revealing that broadband sensitive to power LHW and concomitant variation density-peaking. Additionally, contributions 2.45/4.6 GHz peaking differ when Neutral Beam Injection (NBI) on/off, displaying distinct responses low/high frequency...
Abstract Artificial neural network models have been developed to predict rotation velocity and ion temperature profiles on the EAST tokamak based spectral measurements from x-ray crystal spectrometer. Both Deep Neural Network (DNN) Convolutional (CNN) employed infer line-integrated temperatures. The predicted results these two exhibit a strong correlation with target values, providing an opportunity for cross-validation enhance prediction accuracy. Notably, computational speed of has...
Abstract The transition from small edge-localized modes (ELMs) to large ELMs has been repetitively observed in minute-scale long-pulse high-confinement mode (H-mode) discharges 2017 EAST campaign. appearance of is found be strongly correlated with the decrease separatrix density due gradual fuel recycling during H-mode operations (LPHOs). By numerical scan a fixed temperature profile, it that dependence ELM instability on related competition between ion diamagnetic stabilizing effect and...
Abstract The Xe 44+ 2.7203 Å line, which has been proposed as one of the diagnostic lines for x-ray imaging crystal spectrometer on ITER, is observed EAST tokamak together with its several satellite lines. observations are made under high electron temperature ( T e ) conditions (core > 5 keV). Most xenon identified by comparing experiment results atomic simulation results. first ion measurements spectra also reported in this article. These contribute to justification using impurity...
Abstract Ion temperature ( T i ) profiles are commonly observed to increase in peaking, leading higher central , after impurity seeding the EAST H-mode plasma. Argon can be more efficient at raising than neon. Toroidal rotation also enhanced scenarios with NBI heating. A significant toroidal is brought about by argon Turbulence experimentally suppressed. Extensive modeling using quasilinear gyrokinetic code QuaLiKiz performed explain above observations. It found that always explained...
Plasma toroidal rotation acceleration in the co-current direction introduced by n = 1 (toroidal mode number) static resonant magnetic perturbation (RMP) has been observed EAST tokamak. It strongly depends on RMP coil configuration, which is manifested its dependence δϕUL (phase difference between upper and lower coils) current. Modeling results from NTVTOK based linear plasma response modeled MARS-F shows that Neoclassical Toroidal Viscosity (NTV) torque because of dominant contribution...
Abstract Enhanced confinement is observed in EAST low <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msub> <mml:mi>q</mml:mi> <mml:mn>95</mml:mn> </mml:mrow> </mml:msub> </mml:math> ( <mml:mo><</mml:mo> <mml:mn>3.5</mml:mn> ) plasmas with the temperature ratio <mml:mi>T</mml:mi> <mml:mi>i</mml:mi> <mml:mo>/</mml:mo> <mml:mi>e</mml:mi> increasing. A statistically significant positive correlation between <mml:mi>H</mml:mi> <mml:mn>98</mml:mn>...
Abstract The dynamics of electron-internal transport barrier (e-ITB) formation is studied in the hybrid plasma neutral beam injection and lower wave heating on EAST. e-ITB observed to be repetitively formed at H–L transition, where relaxation process core radiation triggers an increase neutron yield electron temperature. A reversed q -profile beneficial for generating barrier, identified by appearance shear Alfvén eigenmodes (RSAEs). dimensionless parameter normalized Larmor radius <?CDATA...
Abstract A very high core electron temperature ( T e0 ∼ 10 keV) plasma has been established and stably sustained by applying both lower hybrid wave (LHW) on-axis cyclotron resonance heating (ECRH) in the Experimental Advanced Superconducting Tokamak (EAST). In this work, power balance analysis shows that increase of ECRH can normalized e gradient significantly at region ρ < 0.6), but does not change profile stiffness low-density L-mode plasmas. This considered to be due a strong...
Abstract A broadband (BB) mode is observed by collective Thomson scattering diagnostics in repeatable shots of EAST and analyzed for the first time. This BB usually grows during L–H transitions, featuring a quasi-coherent with increasing frequency. During H-mode operations, it characterized steady-state high-frequency range ( f ∼ 200–2000 kHz), at electron scale k θ ρ s = 1‒2), mainly driven density gradient, sensitive to value η e region interest 0.4‒0.8), where <?CDATA ${\eta...
Impurities degrade tokamak plasma confinement by causing energy loss, diluting fuel concentration, and even terminating discharge in some extreme cases. Previously, the suppression effects of impurity accumulation due to on-axis electron cyclotron resonance heating (ECRH) have been studied on Experimental Advanced Superconducting Tokamak (EAST) using ultraviolet (EUV) spectroscopy. However, it is difficult quantify changes tungsten (W) profile since W-line emission EUV range cannot be easily...
SignificanceSingle-chip imaging devices featuring vertically stacked photodiodes and pixelated spectral filters are advancing multi-dye methods for cancer surgeries, though this innovation comes with a compromise in spatial resolution. To mitigate drawback, we developed deep convolutional neural network (CNN) aimed at demosaicing the color near-infrared (NIR) channels, its performance validated on both pre-clinical clinical datasets.AimWe introduce an optimized CNN designed NIR images...