36 citations · 81 across the 15 of their papers we have counts for
15 papers
First reduced model for integrated computations of helicon wave heating and current drive in magnetic fusion plasmas
Zi-Chen Kan, Lei Chang, Zhen-Yu Wang +9
Fast predictive modelling of radio-frequency heating and current drive is important for integrated tokamak scenario design, yet kinetic calculations of helicon-wave absorption rema…
Relaxed magnetohydrodynamics with cross-field flow
Arash Tavassoli, Stuart R. Hudson, Zhisong Qu +1
The phase-space Lagrangian model of Dewar et al. (Phys. Plasmas 27, 062507, 2020) provides a framework for incorporating cross-field flow into relaxed equilibria while retaining id…
Three Dimensional Multiphysics Modelling of Helicon Wave Heating and Antenna Plasma Coupling for Boundary Density Control in Toroidal Fusion Plasmas
Hua Zhou, Lei Chang, GuoSheng Xu +5
Active control of scrape off layer density is emerging as a critical requirement for improving ion cyclotron resonance heating and enabling high performance steady state operation…
Machine learning prediction of plasma behavior from discharge configurations on WEST
Chenguang Wan, Feda Almuhisen, Philippe Moreau +10
Accurately predicting plasma behavior based on discharge configurations is essential for the safe and efficient operation of tokamak experiments. While physics-based integrated mod…
Shear Alfvén Waves in Chaotic Magnetic Fields
Matthew Thomas, Zhisong Qu, Matthew Hole
The shear Alfvén spectrum is computed in the presence of symmetry breaking perturbations that introduce chaotic magnetic field trajectories. Quadratic flux minimised surfaces allow…
Sawtooth crash in tokamak as a sequence of Multi-region Relaxed MHD equilibria
Zhisong Qu, Yao Zhou, Arunav Kumar +3
This study examines the sawtooth crash phenomenon in tokamak plasmas by modelling it as a sequence of Multi-region Relaxed Magnetohydrodynamic (MRxMHD) equilibria. Using the Steppe…
Near-ideal relaxed MHD in slab geometry
Arash Tavassoli, Stuart R. Hudson, Zhisong Qu +1
We investigate the solutions of the relaxed MHD model (RxMHD) of Dewar \& Qu [J. Plasma Phys. {\bf 88}, 835880101 (2022)]. This model generalizes Taylor relaxation by including the…
Simulation of convective transport during frequency chirping of a TAE using the MEGA code
Hooman Hezaveh, Yasushi Todo, Zhisong Qu +2
We present a procedure to examine energetic particle phase-space during long range frequency chirping phenomena in tokamak plasmas. To apply the proposed method, we have performed…
Theoretical description of chirping waves using phase-space waterbags
Hooman Hezaveh, Zhisong Qu, Matthew Hole +1
The guiding centre dynamics of fast particles can alter the behaviour of energetic particle driven modes with chirping frequencies. In this paper, the applicability of an earlier t…
Time-dependent relaxed magnetohydrodynamics -- inclusion of cross helicity constraint using phase-space action
R. L. Dewar, J. W. Burby, Z. Qu +2
A new formulation of time-dependent Relaxed Magnetohydrodynamics (RxMHD) is derived variationally from Hamilton's Action Principle using microscopic conservation of mass, and macro…
The impact of anisotropy on ITER scenarios
M. J. Hole, Z. Qu, S. Pinches +4
We report on the impact of anisotropy to tokamak plasma configuration and stability. Our focus is on analysis of the impact of anisotropy on ITER pre-fusion power operation 5~MA, $…
Impact of energetic particle orbits on long range frequency chirping of BGK modes
H. Hezaveh, Z. S. Qu, B. Layden +1
Long range frequency chirping of Bernstein-Greene-Kruskal modes, whose existence is determined by the fast particles, is investigated in cases where these particles do not move fre…
Modeling the effect of anisotropic pressure on tokamak plasmas normal modes and continuum using fluid approaches
Zhisong Qu, Matthew Hole, Michael Fitzgerald
Extending the ideal MHD stability code MISHKA, a new code, MISHKA-A, is developed to study the impact of pressure anisotropy on plasma stability. Based on full anisotropic equilibr…
Magnetohydrodynamic normal mode analysis of plasma with equilibrium pressure anisotropy
M. Fitzgerald, M. J. Hole, Z. S. Qu
In this work, we generalise linear magnetohydrodynamic (MHD) stability theory to include equilibrium pressure anisotropy in the fluid part of the analysis. A novel 'single-adiabati…
Analysing the impact of anisotropy pressure on tokamak equilibria
Zhisong Qu, Michael Fitzgerald, Matthew John Hole
Neutral beam injection or ion cyclotron resonance heating induces pressure anisotropy. The axisymmetric plasma equilibrium code HELENA has been upgraded to include anisotropy and t…