A5079597015- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Advanced Semiconductor Detectors and Materials
- Radiation Detection and Scintillator Technologies
- Semiconductor Quantum Structures and Devices
- Laser-induced spectroscopy and plasma
- Dust and Plasma Wave Phenomena
- Superconducting Materials and Applications
- Laser-Plasma Interactions and Diagnostics
University of Science and Technology of China
2022-2023
Abstract A linear simulation study of energetic passing particle-driven low-frequency fishbone instability in tokamak plasmas has been carried out using the global kinetic-MHD (magnetohydrodynamics) hybrid code M3D-K. This work is focused on interaction beam ions and n = 1 mode with a monotonic safety factor q profile <?CDATA ${q}_{0}\lt 1.$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>q</mml:mi> </mml:mrow> <mml:mn>0</mml:mn>...
This study presents observations of coherent modes (CMs) in a spherical tokamak using microwave interferometer near the midplane. The CMs within 30–60 kHz frequency range were observed during electron cyclotron resonance heating only, and increased proportionally with square root temperature $R = 0.7m$ . Generally, these displayed bursting chirping signatures strong density rise fall. Their appearance indicated an increase intensity hard x rays, suggesting deterioration energetic...
The density sweeping-down experiments have been performed in order to investigate the electron dynamics and effects on instabilities such as magnetohydrodynamics (MHD) low collisionality regime Experimental Advanced Superconducting Tokamak (EAST). It is found that an electrostatic instability always excited which recognized anomalous Doppler (ADI). ADI characterized by stair-stepping cyclotron emission (ECE), converting parallel energy perpendicular component of energetic electrons direction...
A systematic simulation study of the $n/m=1/1$ instability driven by energetic counter-passing particles in tokamak plasmas has been carried out using kinetic-MHD (Magnetohydrodynamics) hybrid code M3D-K. The safety factor's radial profile is monotonically increasing with central value $q_0$ less than unity. linear results show that either a $m/n=1/1$ particle mode or global Alfvén eigenmode depending on factor. frequencies are close to tip continuum spectrum at magnetic axis. excited modes...