A5064425619- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Fusion materials and technologies
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Solar and Space Plasma Dynamics
- Mineral Processing and Grinding
- Advanced machining processes and optimization
- Laser-induced spectroscopy and plasma
- Drilling and Well Engineering
- Software-Defined Networks and 5G
- Mobile Agent-Based Network Management
- Geophysics and Gravity Measurements
- GNSS positioning and interference
Chinese Academy of Sciences
2021-2024
Shenyang Institute of Automation
2024
Institute of Plasma Physics
2021-2023
University of Science and Technology of China
2021-2023
Hefei Institutes of Physical Science
2021
Wuhan Institute of Physics and Mathematics
2008
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 The properties of core turbulence and thermal transport are investigated for EAST high- β P ( ∼ 3.1) plasmas with dominant electron heating T e / i > 1) via gyrokinetic simulation the NLT code. Linear simulations identify that electrostatic <?CDATA ${\eta _e}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msub> <mml:mi>η</mml:mi> <mml:mi>e</mml:mi> </mml:msub> </mml:mrow> </mml:math> -driven trapped mode -TEM) dominates in region ρ...
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 An advanced scenario with high poloidal beta, large-radius internal transport barriers (ITBs) and localized reversed-shear q -profile, has been demonstrated in DIII-D/EAST joint experiments recently on the DIII-D tokamak. This is also one of future explorations EAST. In this article, integrated modeling utilized to explore regime -profile performance based developed long-pulse A a strong achieved combination 2 MW off-axis ECH, 2.6 LHW NBI (H 98y2 ∼ 1.35, <?CDATA ${\beta...
Abstract The neutral beamline originally located on Port F is being modified to D and the injection direction changed from clockwise (counter-IP) counterclockwise (co-IP) EAST. operational quality of two beamlines will also be upgraded in following months. beam current drive (NBCD) substantially improved due change balanced-injection same with plasma by simulation ONETWO/NUBEAM TRANSP/NUBEAM codes. Discharge scenarios typical parameters are modeled evaluate NBCD performances for beams at...
Abstract An internal transport barrier (ITB) can be formed on EAST in exploring high-parameter operation. Previous studies show that safety factor ( q ) profiles, Shafranov shift and magnetohydrodynamic behaviors could helpful ITB formation by suppressing anomalous transport. Recently, electron density evolution with high resolution demonstrates fishbone dominant sustainment. The power threshold is low the condition profile determined traits of fishbone. Simulation shows low- k ion mode...
Abstract In the pedestal region of Experimental Advanced Superconducting Tokamak (EAST) during high confinement mode plasma operations with radio-frequency heating, two distinct fluctuations are observed: high-frequency (HFFs) and edge harmonic oscillation-like (EHO-like) modes. The HFFs characterized by intermittent a broadband frequency range <?CDATA $1{-}3{\text{ MHz}}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mn>1</mml:mn>...
The excitation condition of reversed shear Alfvén eigenmodes (RSAEs) has been investigated during sawtooth-like oscillation in the EAST tokamak. phenomena can be reproduced configuration magnetic shear, and threshold gradient electron temperature is formed accordingly, together with increasing confinement thermal particles. distribution function energetic ions density altered dramatically when neutral beam switched from NBI1L (tangent) to NBI1R (perpendicular), which captured by measurement...
Abstract The poloidal width of the filaments induced by type-I edge localized mode has power dependence in EAST. widths observed high-speed vacuum ultraviolet (VUV) imaging system are proportional to heating and ELM size. To understand this dependence, BOUT++ nonlinear simulations have been performed with reconstructed equilibriums from experimental measurements paper. synthetic filament structures simulation match observations VUV system. also reproduce size inversely toroidal number. low-...
This paper presents the results of density scanning experiment on 2018 EAST campaign to study effect gas fueling energy confinement ELMy H-mode. The is carried out in a USN configuration, with neutral beam and lower hybrid wave heating fueling, upper triangularity δup ∼ 0.47. total stored energy, H98, βN decrease normalized density. Compared variations temperature at pedestal, core decreases more significantly for both Te Ti, leading large reduction pressure an increase pedestal electron...
Analysis of EAST high [[EQUATION]] experiments shows that fishbone activities are accompanied with formation and sustainment ITB performance. Experimental simulation analysis demonstrates the increasing E x B shear flow by NBI is important for Ti-ITB. And, Ti-ITB disappears reduction plasma rotation. While ITBs in channels Te not achieved until observed, which means mainly affects flow, leading to Ti-ITBs. A possible explanation all induce feedback process ITBs, increase as well ITBs.
Analysis of EAST high [[EQUATION]] experiments shows that fishbone activities are accompanied with formation and sustainment ITB performance. Experimental simulation analysis demonstrates the increasing E x B shear flow by NBI is important for Ti-ITB. And, Ti-ITB disappears reduction plasma rotation. While ITBs in channels Te not achieved until observed, which means mainly affects flow, leading to Ti-ITBs. A possible explanation all induce feedback process ITBs, increase as well ITBs.
Negative central magnetic shear or reversal is an attractive aspect for advanced operation scenarios in tokamaks as it suppresses turbulence and facilitates the formation of internal transport barriers (ITBs). The scenario with negative shear, which associated high confinement quality, a large bootstrap fraction, ITBs, so on, one future goals experiments on EAST. In this work, modeling efforts have been made to find regimes EAST large-radius ITBs. results indicate that ITBs can be achieved...