A5113879966- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Ionosphere and magnetosphere dynamics
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Fusion materials and technologies
- Laser-Plasma Interactions and Diagnostics
- Solar and Space Plasma Dynamics
- Luminescence and Fluorescent Materials
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Physics and Applications
- RNA Interference and Gene Delivery
- Supramolecular Self-Assembly in Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Dendrimers and Hyperbranched Polymers
- Antenna Design and Optimization
- Electromagnetic Scattering and Analysis
- Seismic Imaging and Inversion Techniques
- Pulsed Power Technology Applications
- Advanced X-ray Imaging Techniques
- GNSS positioning and interference
- Polar Research and Ecology
- International Environmental Law and Policies
Chinese Academy of Sciences
2016-2025
Institute of Software
2025
Capital Normal University
2024
Institute of Plasma Physics
2015-2024
Hefei Institutes of Physical Science
2023-2024
Sichuan University
2022
Southwestern Institute of Physics
2022
University of South China
2020
University of Science and Technology of China
1996-2020
South China Institute Of Environmental Sciences
2019
Strong mitigation of edge-localized modes has been observed on Experimental Advanced Superconducting Tokamak, when lower hybrid waves (LHWs) are applied to H-mode plasmas with ion cyclotron resonant heating. This demonstrated be due the formation helical current filaments flowing along field lines in scrape-off layer induced by LHW. leads splitting outer divertor strike points during LHWs similar previous observations magnetic perturbations. The change topology qualitatively modeled...
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...
The differential scattering cross sections and the generalized oscillator strengths of 1${\mathrm{}}^{1}$S\ensuremath{\rightarrow}2${\mathrm{}}^{1}$S 1${\mathrm{}}^{1}$S\ensuremath{\rightarrow}2${\mathrm{}}^{1}$P transitions helium have been measured by angle-resolved electron-energy-loss spectroscopy with an incident electron energy 1500 eV within range 2\ifmmode^\circ\else\textdegree\fi{}--11.5\ifmmode^\circ\else\textdegree\fi{} angles. corrections for angular factors density effects also...
Two sorts of Gd-Co-Al ternary alloys multi-phase structure with table-like magnetocaloric effect (MCE) suitable for the ideal Ericsson cycle have been developed. One is prepared by arc-melting Gd53Co19Al28 resulting alloy composed Gd2Al, Gd2Co2Al, and GdCo0.74Al1.26 crystalline phases other synthesized suck-casting Gd52.5Co16Al31 which has a glassy Gd2Al Gd2Co2Al. Metamagnetic transition antiferromagnetic phase near 50 K ferromagnetic transitions GdCo0.74Al1.26, 80 result in occurring...
EAST has been equipped with two high power lower hybrid current drive (LHCD) systems operating frequencies of 2.45 GHz and 4.6 GHz. Comparative LHCD experiments the different were performed in same conditions plasma for first time. It was found that (CD) efficiency heating effect are much better LH waves than one High confinement mode (H-mode) discharges as sole auxiliary source have obtained is higher respect to produced previously by A combination ray-tracing Fokker-Planck calculations...
Abstract Temperature significantly impacts responsivity, detectivity, and stability of photodetectors, which are crucial for converting optical signals to electrical in applications like communication imaging. WS 2 , a transition metal dichalcogenide with tunable band gaps high carrier mobility, shows promise optoelectronics. However, previous studies on nanotube-based photodetectors primarily focused room temperature conditions traditional synthesis methods, have limitations morphology...
Radio frequency (RF) heating in the ion cyclotron range of frequencies (ICRF) is one primary auxiliary methods for EAST. The ICRF system provides 6 MW power phase and will be capable 10 later. Three 1.5 systems a 25 MHz to 70 have already been operation. launchers are designed two current straps with each driven by RF source MW. In this paper brief introduction capability EAST preliminary results presented.
The experiments were carried out to study the coupling characteristics of I-port antenna in ion cyclotron range frequencies (ICRF) EAST. dependencies resistance on various parameters including position, central electron density, gas injection and phasing have been studied. results obtained show that experimental data are consistent with theoretical simulations. We find loading decreases sharply at L-H transition due change plasma density profiles scrape-off layer (SOL). effect low hybrid...
Let there be order: By covalently grafting first- and second-generation dendrons to a polyoxometalate (POM), lamellar or cylindrical nanostructures of the protonated dendron-POM-dendron hybrids have been constructed (see figure), which may open an avenue future fabrication novel solid proton conductors with highly ordered structures. Detailed facts importance specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited typeset. They made...
Generalized oscillator strengths for the vibronic bands of ${\mathrm{A}}^{1}$\ensuremath{\Pi}, ${\mathrm{B}}^{1}$${\mathrm{\ensuremath{\Sigma}}}^{+}$, ${\mathrm{C}}^{1}$${\mathrm{\ensuremath{\Sigma}}}^{+}$, and ${\mathrm{E}}^{1}$\ensuremath{\Pi} have been determined by an angle-resolved electron energy loss spectroscopy at incident 1500 eV in angular range 0.5\ifmmode^\circ\else\textdegree\fi{}--6.0\ifmmode^\circ\else\textdegree\fi{}. The corresponding absolute optical obtained extrapolating...
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...
A new ICRF antenna has been designed in EAST, whose aims are to reduce the parallel RF electric fields E|| and investigate current drive using fast magnetosonic wave. This consists of four toroidally spaced radiating straps. The electrical characteristics estimated by a three-dimensional electromagnetic commercial code. S-parameters, distribution field on near 4-strap analyzed, potentials influenced phasing radial position investigated.
A passive and noninvasive diagnostic system based on high-frequency B-dot probes (HFBs) has been designed developed for the measurement identification of ion cyclotron emission (ICE) in Experimental Advanced Superconducting Tokamak (EAST). Details hardware components this including HFBs, direct current blockers, radio frequency splitters, filters, power detectors as well data acquisition systems are presented. spectrum analyzer is used addition to ordinary speed card registration analysis....
Abstract Bursts of ion cyclotron emission (ICE), with spectral peaks corresponding to the hydrogen harmonic frequencies in plasma core are detected from helium plasmas heated by sub-Alfvénic beam-injected ions ASDEX Upgrade tokamak. Based on fast distribution function obtained TRANSP/NUBEAM code, together a linear analytical theory magnetoacoustic instability (MCI), growth rates MCI could be calculated. In our theoretical and experimental studies, we found that excitation mechanism ICE...
A poly(urethane amide) (PUA) dendron with long alkyl chains on its periphery was synthesized and then attached to the backbone of a polyelectrolyte, in which each unit contained positive charge, by ionizing carboxyl groups apexes dendrons form dendronized polymer. We found that both PUA polymer could organogels toluene. Interestingly, minimum gelation concentration time gelator were greatly reduced compared alone. Our investigations showed gel phase intermolecular hydrogen bonding between...
Employing a dissipative particle dynamics (DPD) approach, we investigate the overcharging behaviors of cylindrical polyelectrolyte brush (CPB) in presence multivalent counterions. The conformational change CPB is considered with increasing concentration We gain insight into re-expansion mechanism by examining various parameters. influence on possibility lyotropic behavior for discussed based ratio persistence length (lp) to diameter (d). Our simulations demonstrate that can exhibit...
Recent ion cyclotron range of frequency (ICRF) experiments combined with lower hybrid wave (LHW) on EAST show that LHW coupling can be strongly modified when the launcher is connected magnetically to a powered ICRF antenna. Using Langmuir probes, investigation radio (RF)-enhanced potential and local plasma parameters under an applied pulse carried out EAST. When antenna probe powered, localized high positive peaks appear floating potential. The dependence modifications various investigated....
Experimental and modeling investigations of high βp scenarios on DIII-D EAST tokamaks show advantages in energy confinement, avoidance n = 1 MHD, core-edge integration with reduced heat flux, making this scenario an attractive option for China Fusion Engineering Test Reactor steady-state operation. Experiments that plasmas confinement density can be achieved neutral beam injection (βp ∼ 2.2, βN 3.5, fBS 50%, fGw 1.0, H98y2 1.5) pure RF power (βP 2.0, 1.6, 0.8, > 1.3). By tailoring the...
Two novel zinc-tetracarboxylate frameworks (FJI-8 and FJI-9) were solvothermally synthesized structurally characterized. The 3D cage-stacking of FJI-8 FJI-9 are each constructed a truncated octahedral cage composed {Zn2(COO)4} paddlewheel SBUs abtc4− ligands. Eight surrounding cages create an inner cuboctahedral cavity. In addition, both exhibit tunable luminescence white-light emission via varying the excitation wavelength.
Ion cyclotron radio frequency (ICRF) wave heating is a primary method to heat ions in the Experimental Advanced Superconducting Tokamak (EAST). Through neutron diagnostics, effective ion was observed hydrogenminority (MH) scenarios. At present, investigation of deuterium–deuterium (DD) fusion neutrons mostly based on time-resolved flux monitor and spectrometer measurements. When ICRF applied, intensity became one order higher. The H/H + D ratio range 5–10%, corresponding hydrogen MH...