A5074935416- Magnetic confinement fusion research
- Laser-Plasma Interactions and Diagnostics
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Laser-induced spectroscopy and plasma
- Semiconductor materials and devices
- Quantum Chromodynamics and Particle Interactions
- Integrated Circuits and Semiconductor Failure Analysis
- Plasma Diagnostics and Applications
- Cosmology and Gravitation Theories
- Rare-earth and actinide compounds
- High-pressure geophysics and materials
- Advanced Data Storage Technologies
- Particle physics theoretical and experimental studies
- Topological Materials and Phenomena
- Fusion materials and technologies
- Laser-Matter Interactions and Applications
- Atomic and Molecular Physics
Institute of Plasma Physics
2021-2024
Changchun Institute of Optics, Fine Mechanics and Physics
2024
Chinese Academy of Sciences
2018-2024
Hefei Institutes of Physical Science
2023-2024
University of Science and Technology of China
2018-2024
Semiconductor Manufacturing International (China)
2006
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 The Gas Electron Multiplier (GEM) camera has been used to investigate the electron dynamics in presence of turbulence and/or a magnetic island disruptive plasmas on Experimental Advanced Superconducting Tokamak (EAST). Interactions between micro and macroscopic structure are observed be mediated by electrons experiencing multiscale instabilities, which accelerated generate non-thermal radiation peaks. After comparisons two typical H-mode shots, statistical database is constructed...
High-k turbulence (1 < kθρs 5) spectrograms have been directly measured in density modulation experiments of the EAST tokamak using collective Thomson scattering diagnostic system. Density-peaking is achieved Lower Hybrid Wave (LHW) experiments, revealing that broadband sensitive to power LHW and concomitant variation density-peaking. Additionally, contributions 2.45/4.6 GHz peaking differ when Neutral Beam Injection (NBI) on/off, displaying distinct responses low/high frequency...
It remains controversial whether compressed ${\mathrm{YbB}}_{6}$ material is a topological insulator or Kondo insulator. We performed high-pressure transport, x-ray diffraction (XRD), absorption spectroscopy, and Raman-scattering measurements on samples in search for its phase. Both powder XRD Raman show no trace of structural phase transitions up to 50 GPa. The nonmagnetic ${\mathrm{Yb}}^{2+}$ gradually change magnetic ${\mathrm{Yb}}^{3+}$ above 18 GPa concomitantly with the increase...
Abstract In recent years magneto-hydrodynamic instabilities have been observed in different experimental scenarios by a gas electron multiplier (GEM) camera, since it was installed on the Experimental Advanced Superconducting Tokamak (EAST). The GEM camera is set up outside EAST vacuum chamber to record x-ray photons through beryllium window, which has obtained valuable data for analysis: (1) neoclassical tearing mode (NTM) onset and (2) plasma disruption dynamics presence of magnetic...
Abstract A broadband (BB) mode is observed by collective Thomson scattering diagnostics in repeatable shots of EAST and analyzed for the first time. This BB usually grows during L–H transitions, featuring a quasi-coherent with increasing frequency. During H-mode operations, it characterized steady-state high-frequency range ( f ∼ 200–2000 kHz), at electron scale k θ ρ s = 1‒2), mainly driven density gradient, sensitive to value η e region interest 0.4‒0.8), where <?CDATA ${\eta...
Since Alfvén activity and turbulence are ubiquitous in magnetically confined plasma, it is important to understand the possible roles have nonlinear evolution of turbulence. The designed experiments low collisionality dedicated studying dynamics between toroidal eigenmodes (TAEs), assessing multi-scale physics on long-term scale behavior fusion plasma. In TAEs (f ∼ 200 kHz, n = 1) mitigation under resonant magnetic perturbations (RMP, nupper 2 nlower 3), there a (∼500 ms) quasi-stationary...
Anomalous electron thermal transport is an important issue that restricts the development of magnetic confinement thermonuclear fusion, and it closely related to electron-scale turbulence. This paper introduces poloidal CO2 laser collective scattering diagnostic system installed on Experimental Advanced Superconducting Tokamak (EAST) for turbulence measurement. The can measure density fluctuations with four distinct wavenumbers simultaneously ranging from 10 30 cm−1 (correspondingly...
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...
Abstract Avoiding the plasma instability, especially disruption is an important problem for stable operation of tokamak. Large-scale instabilities driven by free energy evolve nonlinearly and lead to disruption. The microscale turbulence highly sensitive change energy. paper show electron-scale evolution in pre-precursor phase TMs included with <?CDATA ${{\rm{CO}}}_{2}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi...
Abstract The formation of electron thermal internal transport barriers (eITBs) is investigated by critical gradient threshold analysis for recent EAST experiments with dominant RF heating and low torque injection. ratio temperature to ion temperature, τ = T e / i , identified be the key parameter that triggers eITB in hot mode through turbulence suppression effect shielding. electron-temperature-gradient can greatly increased due strong weak electron–ion energy coupling. evolution found...
With the exponential growth of digital consumer markets cameras, feature phones, PDAs, personal computers, and portable audio/video players, there is high demand for ultrahigh density data storage flash. As flash increases to giga-bits (Gb), critical dimensions are scaling down sub-90nm. It commonly understood that 45 nm beyond, traditional floating gate (FG) will have retention issue due tunnel oxide thinning. Trapped charge based non-volatile memory one top choices resolve above issue....