A5102321043- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Plant Water Relations and Carbon Dynamics
- Remote Sensing in Agriculture
- Fusion materials and technologies
- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Ionosphere and magnetosphere dynamics
- Atmospheric and Environmental Gas Dynamics
Institute of Plasma Physics
2023
Chinese Academy of Sciences
2019
Yantai Institute of Coastal Zone Research
2019
Abstract A primary objective of the Experimental Advanced Super-conducting Tokamak (EAST) is to demonstrate steady-state long-pulse high-performance plasma operation for future large-scale devices like ITER and CFETR[1]. The formation internal transport barriers (ITBs) one key issues achieve operation. Optimizing current density profile promising ways improve confinement which beneficial ITBs. Much endeavour has been dedicated optimize in EAST over recent years.
In this paper,...
Abstract An experiment was conducted on the Experimental Advanced Superconducting Tokamak (EAST) to investigate properties of stiff transport in an electron-heated H-mode plasma, using a power deposition scan with electron cyclotron resonance heating (ECRH). During this experiment, shift lower hybrid wave (LHW) and driven current from plasma core outer regions observed, accompanied by change local magnetic shear. Transport analysis reveals reduction normalized effective thermal diffusivity...
Abstract During the discharge process, thermal events are common and destructive in Tokamak 
experiments. High energy particles plasma can collide with device components such as limiters 
and diverters, which lead to overheating, material cracking, even damage structure of 
the device. Therefore, we need efficient detection methods monitor real-time. 
To address challenge identifying internal first wall 
during Experimental Advanced Superconducting...
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....
Abstract Ecosystem light use efficiency (LUE) is a critical parameter in estimating CO 2 uptake by vegetation from climatological and satellite data. However, the spatiotemporal dynamics biophysical regulations of ecosystem‐level LUE are not well understood, resulting large uncertainties estimation gross primary productivity (GPP) using LUE‐based models. In this study, we used eddy covariance to explore variations controls four contrasting forest ecosystems (savanna, tropical rainforest,...
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...
Abstract Recent experimental results from the EAST superconducting tokamak with a full metal wall (without Li-coating) provide strong support for ITER startup scheme electron cyclotron wave (ECW) assistance. Detailed investigations were performed on impact of different magnetic field geometries, including quadrupolar configuration (QFC), wide null (NFC), and trapped particle (TPC). All three configurations enabled breakdown neutral gas ECW pre-ionization. However, in most discharges QFC,...
Abstract The impact of pellet injection depth on particle transport characteristics and density profile evolution during the post-pellet relaxation phase is investigated Experimental Advanced Superconducting Tokamak (EAST). Experiments were conducted under similar background plasma conditions results showed that variations in deposition depths led to differences profiles despite comparable core fueling efficiencies. By computing effective coefficients immediately after injection, it found...
Abstract Future burning plasma in magnetic confinement fusion devices necessitates diagnostic for measuring broad wavenumber turbulence. The CO 2 laser collective Thomson scattering (CO -CTS) system on EAST is designed mainly electron-scale turbulence measurements. In order to extend the capability detect ion-scale turbulence, key challenges of light separation and signal detection have been successfully addressed by construction extremely-small-angle -CTS (E-CTS) diagnostic. This paper...