A5103253101- Magnetic confinement fusion research
- Fusion materials and technologies
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Ionosphere and magnetosphere dynamics
- Laser-Plasma Interactions and Diagnostics
- Acoustic Wave Phenomena Research
- Plasma Diagnostics and Applications
- Underwater Acoustics Research
- Speech and Audio Processing
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Metamaterials and Metasurfaces Applications
- Electromagnetic Compatibility and Measurements
- Nuclear Engineering Thermal-Hydraulics
- Laser-induced spectroscopy and plasma
- Advanced Frequency and Time Standards
- Blood donation and transfusion practices
- Advanced Antenna and Metasurface Technologies
- Gyrotron and Vacuum Electronics Research
- Solar and Space Plasma Dynamics
- Nuclear Materials and Properties
- Nutrition and Health in Aging
- Poxvirus research and outbreaks
- Software Testing and Debugging Techniques
Chinese Academy of Sciences
2015-2025
University of Electronic Science and Technology of China
2025
China Electronics Technology Group Corporation
2025
Chinese PLA General Hospital
2025
National Clinical Research
2025
Hefei Institutes of Physical Science
2025
Guizhou Normal University
2025
Central South University
2024
Central China Normal University
2024
Tianjin University
2023-2024
The first results of edge-localized mode (ELM) pacing using small spherical lithium granules injected mechanically into H-mode discharges are reported. Triggering ELMs was accomplished a simple rotating impeller to inject sub-millimetre size at speeds few tens meters per second the outer midplane EAST fusion device. During injection phase, were triggered with near 100% efficiency and amplitude induced as measured by Dα clearly reduced compared contemporaneous naturally occurring ELMs. In...
The Experimental Advanced Superconducting Tokamak (EAST) has demonstrated, for the first time, long-pulse divertor plasmas over 400 s, entirely driven by lower hybrid current drive (LHCD), and further extended high-confinement plasmas, i.e. H-modes, 30 s with predominantly LHCD advanced lithium wall conditioning. Many new exciting physics results have been obtained in quest operations. key findings are as follows: (1) access to H-modes EAST favours configuration ion ∇B drift directed away...
Abstract We report an observation of robust suppression edge-localized modes (ELMs) in the Experimental Advanced Superconducting Tokamak (EAST), enabled by continuous boron (B) powder injection. Edge harmonic oscillations appear during B injection, providing sufficient particle transport to maintain constant density and avoid impurity accumulation ELM-stable plasmas. Quasi-steady ELM discharges are demonstrated with modest energy confinement improvement over a wide range conditions: heating...
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 Experimental Advanced Superconducting Tokamak (EAST) has recently achieved a variety of H-mode regimes with different edge-localized mode (ELM) dynamics, including type-I ELMs, compound which are manifested by the onset large spike followed sequence small spikes on Dα emissions, usual type-III and very ELMs. This newly observed ELMy appears to be similar type-II H-mode, higher repetition frequency (∼1 kHz) lower amplitude than exhibiting an intermediate confinement level between H-modes....
The internal transport barrier (ITB) has been obtained in ELMy H-mode plasmas by neutron beam injection and lower hybrid wave heating on the Experimental Advanced Superconducting Tokamak (EAST). ITB structure observed profiles of ion temperature, electron density within ρ < 0.5. It was also that formation is stepwise. Due to formation, confinement quality H98y2 increases from 1 1.1 normalized beta, βN, 1.5 near 2. fishbone activity during phase suggests central safety factor q(0) ∼ 1....
Significant engineering and physic progress was made by the upgrade of a flowing liquid lithium limiter (FLiLi) inserted into EAST H-mode discharges in 2016. The includes an improvement Li coverage uniformity, no macroscopic surface erosion plasma materials interaction, effective removal 55% discharge heat flux using high pressure He cooling during ohmic discharges, demonstrated ability to restart flow for second experiment performed week after first. With increasing rate, fuel particle...
Abstract By using the recently developed Thomson scattering diagnostic, pedestal structure of H-mode with neutral beam injection (NBI) or/and lower hybrid wave (LHW) heating on EAST (Experimental Advanced Superconducting Tokamak) is analyzed in detail. We find that a higher ratio power NBI to total and will produce large regular different edge-localized mode (ELM), small irregular ELM. The experiments show mean width has good correlation <?CDATA $\beta _{\text{p},\text{ped}}^{0.5}$ ?>...
Abstract A new ion cyclotron range of frequency (ICRF) antenna, instead a B-port is installed at the N-port to improve power coupling in 2021 experimental advanced superconducting tokamak (EAST) campaign. In all experiments, 37 MHz used, corresponding hydrogen minority heating deuterium plasma B 0 = 2.5 T. The maximum resistance up 10 Ω, which close two times original antennas EAST. stored energy increased by 30 kJ MW −1 , and significant core electron are observed. For long pulse operation,...
Energy transport analyses of the DIII-D high- EAST-demonstration discharges have been performed using TGYRO package with TGLF turbulent and NEO neoclassical models under OMFIT integrated modeling framework. Ion energy is shown to be dominated by ion temperature profiles predicted agree closely experimental measured for these discharges. largely insensitive reductions in flow shear stabilization. The Shafranov shift play a role suppression below level. Electron under-predicted significant...
<title>Abstract</title> <bold>Background</bold> Muscle mass (MM) was important because of its strong correlation with all-cause mortality. However, assessment complex, nonportable and expensive. Serum creatine kinase (CK) proposed to counteract this problem. mortality unknown. <bold>Objectives</bold> The aim study investigate the associations between serum CK levels risk in Chinese centenarians. <bold>Methods</bold> A prospective cohort centenarians conducted classify according via...
ABSTRACT A high efficiency three‐way power combiner used in solid state amplifier (SSPA) is proposed this letter. The a six ports circuit composing of cover plate, PCB and base which can achieve signals combining with broadband isolation. Compared the existing combiner, branch microstrip lines are adopted instead isolation resistors between lines, structure avoid resistance loss improve efficiency. From measured results, less than 4.8 ± 0.2 dB three equivalent insertion losses, more 21...
The q(r) profile distribution is a critical issue for the confinement and stability of plasma. optimized profiles can help reduce magnetic disturbances in field, particle energy loss plasma, inhibit development turbulence instability, improve This paper mainly discusses improved due to appearance q = 1 surface. plasma internal inductance (li) two discharges evolved differently after LH power injection under same heating condition. Meanwhile, different (the surface) accompanying with electron...
Abstract A series of steady-state H-mode discharges have been conducted on Experimental and Advanced Superconducting Tokamak (EAST) to demonstrate that, under a given discharge condition during operation sustained by lower hybrid wave current drive electron cyclotron heating. Results show that plasma confinement can bifurcate into distinct high-confinement modes based initial conditions. Theoretical analysis reveals the deposition power driven current, which together shape q-profile, depend...
Plasma heating using fast waves was successfully performed on the Experimental Advanced Superconducting Tokamak (EAST) in H minority regime deuterium plasmas at 27 MHz and B o = 2.0 T. With 1.0 MW of ion cyclotron range frequency (ICRF) power injected a line-averaged electron density 4.0 × 10 19 m −3 , temperature increased from keV to above loop voltage dropped. An increase stored energy by 30 kJ obtained. The first H-mode plasma 6.4 s achieved with combination lower hybrid wave ICRF...
Abstract Recently, the first ever 100 s long, steady-state H-mode discharge with good control of impurities, core and edge MHD stabilities, heat exhaust was demonstrated in Experimental Advanced Superconducting Tokamak (EAST) using ITER-like (International Reactor) tungsten upper divertor. Using both radio frequency (RF) power neutral beam injection (NBI) heating, EAST has fully non-inductive scenarios an extension fusion performance at high density low rotation: β P ∼ 2.5, N 2.0, H 98,y2...
The acoustic impedance mismatch between water and air limits the communication through water–air interface. Here, based on resonances of bubbles, we propose a metasurface consisting bubbles sealed with membranes for perfect sound transmission at We have experimentally achieved enhancement over 20 dB 380–510 Hz, thickness about 1/180 times wavelength. By flexibly adjusting immersion depth, is able to operate multiple frequencies. effects viscosity geometry are discussed simulatively. present...
Abstract Since the last IAEA-FEC in 2021, significant progress on development of long pulse steady state scenario and its related key physics technologies have been achieved, including reproducible 403 s long-pulse steady-state H-mode plasma with pure radio frequency (RF) power heating. A thousand-second time scale (∼1056 s) fully non-inductive high injected energy up to 1.73 GJ has also achieved. The EAST operational regime β P significantly extended ( H 98y2 > 1.3, ∼ 4.0, N 2.4 n e / GW...
Abstract The stabilization of the m / n = 2/1 neoclassical tearing mode (NTM) by electron cyclotron current drive (ECCD) has been carried out in EAST H-mode discharges, where is poloidal/toroidal number. experimental results are reported for first time this paper. To facilitate study, magnetic island generated a sufficiently large amplitude externally applied resonant perturbation (RMP). After switching off RMP, NTM exists due to bootstrap perturbation, with width being about 5 cm local...
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...
Joint DIII-D/EAST experiments in the radio-frequency (RF) heated H-mode scheme with comparison to that of neutral beam (NB) were carried out on DIII-D and EAST under similar conditions examine effect heating scrape-off layer (SOL) width plasmas for application ITER. A dimensionally plasma equilibrium was used match shape parameters. The divertor heat flux SOL widths measured infra-red camera DIII-D, while Langmuir probe array EAST. It has been demonstrated both RF-heated a broader than...
In lower hybrid current drive (LHCD) plasmas with non-zero loop voltage, the fast electron tail can act as a seed population of runaways. The runaways are found to be enhanced in presence (LH) waves when extends above critical velocity for electrons run away. runaway discharges, LH may suppress due drop electric field linked non-inductive drive. this paper, behaviour an extensive range LHCD is presented.