A5028770009- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Ionosphere and magnetosphere dynamics
- Laser-Plasma Interactions and Diagnostics
- Nuclear Engineering Thermal-Hydraulics
Chinese Academy of Sciences
2024-2025
Hefei Institutes of Physical Science
2024-2025
Institute of Plasma Physics
2024-2025
University of Science and Technology of China
2024-2025
General Atomics (United States)
2025
Recent high-poloidal-beta (high-βP) experiments on DIII-D and EAST have made coordinated breakthroughs for high confinement quality at density near the Greenwald limit. Density gradient amplification of turbulence suppression βP can explain both these achievements. Experiments achieved fraction (fGr = line-averaged density/Greenwald density) above 1 simultaneously with normalized energy (H98y2) around 1.5, as required in fusion reactor designs but never before verified tokamak divertor...
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,...
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 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 Experimental research on the electron cyclotron wave (ECW) pre-ionization and assisted start-up was carried out systematically for first time in EAST tokamak, which is a superconducting device with ITER-like full metal wall. Breakdown plasma initiation at low toroidal electric fields (<0.3 V m −1 ) ECW startup assistance has been demonstrated. Also, parameter domain of breakdown significantly extended towards higher prefill gas pressure. The effect injection timing, power, angle...
The saturated internal kink mode with m/n = 1/1 has been observed in the H-mode discharge of experimental advanced superconducting tokamak, characterized by high βP and weak magnetic shear core. This observation was made using a combination soft x-ray imaging electron cyclotron emission diagnostics. It noted that repetitive bursting (large amplitude, short duration) transitions into long-lasting continuous one (small constant frequency), when βp&gt; 2.2 H-mode, much shorter duration,...
Abstract Plasma confinement and transport in tokamaks play a crucial role the development of high poloidal beta steady-state operation scenarios. Therefore, it is very important to study relevant mechanism internal barriers (ITBs), which can help plasmas obtain better order achieve higher fusion gain. This paper mainly introduces analysis characteristics electron heat discharges with ITB <?CDATA ${ }{{{\beta }}_{\text{P}}}\,$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
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 Controlling the splitting divertor heat flux caused by resonant magnetic perturbations (RMPs) is a topic of concern for fusion devices. As fundamental prerequisite, it necessary to understand characteristics distribution under applied RMP field, which will be studied in this paper. The nonlinear phenomenon strike point was found strongly dependent on plasma response RMP. These distributions are qualitatively explained simulated footprints. phase scanning experiment shows that...