Kedong Li
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View article: Molecular dynamics simulation of tungsten surface sputtering under low–energy neon irradiation for radiative divertor scenarios
Molecular dynamics simulation of tungsten surface sputtering under low–energy neon irradiation for radiative divertor scenarios Open
Neon (Ne) is a key candidate impurity for radiative divertor operation in tokamaks, aiming to reduce the thermal load on the divertor targets. However, its injection can simultaneously enhance tungsten surface erosion. In this work, molecu…
View article: The effect of neon seeding on plasma edge transport in EAST
The effect of neon seeding on plasma edge transport in EAST Open
Impurity seeding is crucial for power exhaust in future power plants. In the presented analysis, neon seeding for the Experimental Advanced Superconducting Tokamak (EAST) tokamak is studied. Experiments from the 2019 campaign are taken as …
View article: Study of the effect of the pedestal density profiles on the pedestal structure in EAST
Study of the effect of the pedestal density profiles on the pedestal structure in EAST Open
Additional particle control methods, such as gas puffing, may lead to changes in the ratio between the separatrix electron density and the pedestal electron density ( ), and lead to the relative shift between the density …
View article: Study on the turbulence transition in the pedestal of high-density H-mode plasmas in EAST
Study on the turbulence transition in the pedestal of high-density H-mode plasmas in EAST Open
In the Experimental Advanced Superconducting Tokamak (EAST), a transition from electromagnetic to electrostatic turbulence is observed in the pedestal region as plasma density ramps up. This transition is manifested by the suppression of m…
View article: Experimental research on the deeply detached X-point radiator regime on EAST
Experimental research on the deeply detached X-point radiator regime on EAST Open
Radiative divertor detachment with impurity seeding is considered one of the most promising means for mitigating particle and heat fluxes on the divertor target. To measure the impurity radiation distribution, a tangentially viewing camera…
View article: Towards detachment-compatible I-mode plasma on EAST tokamak
Towards detachment-compatible I-mode plasma on EAST tokamak Open
The divertor detachment is important for the improved confinement mode (I-mode) to serve as a reliable operating scenario in future fusion reactors. A reproducible steady-state I-mode operation with the energy detachment of the inner targe…
View article: Turbulence suppression at extreme plasma densities on DIII-D and EAST
Turbulence suppression at extreme plasma densities on DIII-D and EAST Open
Recent high-poloidal-beta (high-βP) experiments on DIII-D and EAST have made coordinated breakthroughs for high confinement quality at high density near the Greenwald limit. Density gradient amplification of turbulence suppression at high …
View article: Deep learning-enabled real-time prediction of impurity-induced detachment in EAST
Deep learning-enabled real-time prediction of impurity-induced detachment in EAST Open
Impurity seeding has been consistently demonstrated to facilitate plasma detachment, effectively reducing the amount of heat and particles reaching divertor targets. However, achieving and maintaining a stable detached state requires preci…
View article: ECW assisted plasma startup with low toroidal electric field and full metal wall in EAST superconducting tokamak
ECW assisted plasma startup with low toroidal electric field and full metal wall in EAST superconducting tokamak Open
Recent experimental results from the EAST superconducting tokamak with a full metal wall (without Li-coating) provide strong support for the ITER startup scheme with electron cyclotron wave (ECW) assistance. Detailed investigations were pe…
View article: A metal-wall compatible high-confinement tokamak plasma regime for fusion energy
A metal-wall compatible high-confinement tokamak plasma regime for fusion energy Open
The international thermonuclear experimental reactor (ITER) is now considering to use tungsten as the material for plasma-facing components (PFCs) [1] and operate in the so-called high-confinement mode (H-mode) [2]. Heat pulse eruptions ca…
View article: Effects of divertor geometry on detachment and core plasma performance with impurity seeding in EAST
Effects of divertor geometry on detachment and core plasma performance with impurity seeding in EAST Open
Divertor detachment operation compatible with the core plasma is an effective method to alleviate the steady-state heat flux approaching the divertor target; this scheme will be adopted by high-performance tokamaks in the future, such as I…
View article: Dependence of ELM instability on separatrix density in EAST long-pulse H-mode plasmas
Dependence of ELM instability on separatrix density in EAST long-pulse H-mode plasmas Open
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 during the 2017 EAST campaign. The appearance of large ELMs is found to…
View article: A long-pulse small edge-localized-mode high-confinement plasma with detachment feedback control by floating potential in an experimental advanced superconducting tokamak in a metal wall environment
A long-pulse small edge-localized-mode high-confinement plasma with detachment feedback control by floating potential in an experimental advanced superconducting tokamak in a metal wall environment Open
One of the key challenges facing magnetic fusion research is to demonstrate the compatibility between high confinement and radiative divertors in long-pulse discharges with a metal wall environment. A small edge-localized-mode (ELM) high-c…
View article: Compatibility of divertor detachment and ELM suppression in DIII-D high- <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mrow> <mml:mi>β</mml:mi> </mml:mrow> </mml:mrow> <mml:mrow> <mml:mtext>p</mml:mtext> </mml:mrow> </mml:msub> </mml:mrow> </mml:mrow> </mml:math> plasmas with ITER-similar shape
Compatibility of divertor detachment and ELM suppression in DIII-D high- plasmas with ITER-similar shape Open
Integration of transient and steady-state divertor heat fluxes control with a high-performance core is necessary for future fusion reactors. In recent DIII-D high- experiments, divertor detachment and simultaneous edge localized mod…
View article: Overview of recent experimental results on the EAST Tokamak
Overview of recent experimental results on the EAST Tokamak Open
Since the last IAEA-FEC in 2021, significant progress on the development of long pulse steady state scenario and its related key physics and technologies have been achieved, including the reproducible 403 s long-pulse steady-state H-mode p…
View article: Experimental and modeling study of the impact of upstream D2 puff on divertor detachment and impurity control with argon seeding in EAST
Experimental and modeling study of the impact of upstream D2 puff on divertor detachment and impurity control with argon seeding in EAST Open
Radiative divertor is an effective method for the divertor heat flux control, but excessive core impurity radiation can deteriorate the confinement in tokamaks. In recent EAST experiments, the compatibility of divertor detachment and impur…
View article: Comparison of partial and deep energy detachment behaviors with Ar seeding on EAST new corner slot divertor
Comparison of partial and deep energy detachment behaviors with Ar seeding on EAST new corner slot divertor Open
It is necessary for future fusion reactor to reduce the heat fluxes on the entire divertor target, especially if view of long pulse high performance operation. In recent EAST experiments, partial energy detachment without confinement degra…
View article: Mechanism of enhanced ion temperature by impurity seeding in EAST H-mode plasma
Mechanism of enhanced ion temperature by impurity seeding in EAST H-mode plasma Open
Ion temperature ( T i ) profiles are commonly observed to increase in peaking, leading to higher central T i , after impurity seeding in the EAST H-mode plasma. Argon can be more efficient at raising T i than neon. Toroidal rotation can al…
View article: Impacts of recycling impurity on the background ELM behavior during repetitive radiative divertor experiments in EAST
Impacts of recycling impurity on the background ELM behavior during repetitive radiative divertor experiments in EAST Open
A significant change in the background ELM behavior prior to neon (Ne) seeding has been observed in a series of repetitive radiative divertor experiments in EAST. With similar operational parameters, the ELM behavior before Ne seeding chan…
View article: Variability in chewing, ruminal fermentation, digestibility and bacterial communities between subacute ruminal acidosis-susceptible and acidosis-tolerant sheep
Variability in chewing, ruminal fermentation, digestibility and bacterial communities between subacute ruminal acidosis-susceptible and acidosis-tolerant sheep Open
Sorting behaviour is a common phenomenon observed in ruminants when they are provided with a total mixed ration, which contributes to variations in the severity of subacute ruminal acidosis (SARA). Pelleted total mixed ration (PTMR) reduce…
View article: Observation of electron-scale turbulence suppression under weak magnetic shear with neon seeding in EAST plasma
Observation of electron-scale turbulence suppression under weak magnetic shear with neon seeding in EAST plasma Open
Improved confinement caused by Ne injection is investigated in EAST. The safety factor q profile and electron-scale turbulence are studied with a polarimeter-interferometer system and CO 2 laser collective scattering system in a series of …
View article: Long-pulse H-mode operation with stored-energy monitoring for detachment feedback control with a new lower tungsten divertor in EAST
Long-pulse H-mode operation with stored-energy monitoring for detachment feedback control with a new lower tungsten divertor in EAST Open
One of the key challenges for future fusion research is to mitigate the high steady-state heat load on the divertor target plates, and divertor detachment offers a promising solution. The Experimental Advanced Superconducting Tokamak (EAST…
View article: Modelling Study of Divertor Pumping Effect on Detachment and Impurity Retention with Argon Seeding in East
Modelling Study of Divertor Pumping Effect on Detachment and Impurity Retention with Argon Seeding in East Open
View article: Compatibility of large ELM control and stable partial detachment with neon/argon seeding in EAST
Compatibility of large ELM control and stable partial detachment with neon/argon seeding in EAST Open
It is necessary to achieve simultaneous exhaust of excessive transient and steady-state heat fluxes on the divertor target for the divertor protection in the future fusion reactors. The sustained large ELM control and stable partial detach…
View article: Physical mechanisms for the transition from type-III to large ELMs induced by impurity injection on EAST
Physical mechanisms for the transition from type-III to large ELMs induced by impurity injection on EAST Open
View article: EAST steady-state long pulse H-mode with core-edge integration for CFETR
EAST steady-state long pulse H-mode with core-edge integration for CFETR Open
A recent EAST experiment has successfully demonstrated long pulse steady-state high plasma performance scenario and core-edge integration since the last IAEA in 2018. A discharge with a duration over 60 s with β P ∼ 2.0, β N ∼ 1.6, H 98y2 …
View article: Achievements of actively controlled divertor detachment compatible with sustained high confinement core in DIII-D and EAST
Achievements of actively controlled divertor detachment compatible with sustained high confinement core in DIII-D and EAST Open
The compatibility of efficient divertor detachment with high-performance core plasma is vital to the development of magnetically controlled fusion energy. The joint research on the EAST and DIII-D tokamaks demonstrates successful integrati…
View article: Physics design of new lower tungsten divertor for long-pulse high-power operations in EAST
Physics design of new lower tungsten divertor for long-pulse high-power operations in EAST Open
A new lower tungsten divertor has been developed and installed in the EAST superconducting tokamak to replace the previous graphite divertor with power handling capability increasing from <2 MW m −2 to ∼10 MW m −2 , aiming at achieving lon…
View article: Advances in the long-pulse steady-state high beta H-mode scenario with active controls of divertor heat and particle fluxes in EAST
Advances in the long-pulse steady-state high beta H-mode scenario with active controls of divertor heat and particle fluxes in EAST Open
Since the last IAEA-Fusion Energy Conference, the Experimental Advanced Superconducting Tokamak (EAST) research program has been, in support of ITER and CFETR, focused on development in terms of the long-pulse steady-state (fully noninduct…
View article: Sustained edge-localized-modes suppression and radiative divertor with an impurity-driven instability in tokamak plasmas
Sustained edge-localized-modes suppression and radiative divertor with an impurity-driven instability in tokamak plasmas Open
We report simultaneous control of the large edge localized modes (ELMs) and divertor heat fluxes in a metal wall environment is a critical issue for steady-state operation of a tokamak fusion reactors. Here we report a sustained ELM suppre…