20 citations · 53 across the 10 of their papers we have counts for
10 papers
A high-fidelity surrogate model for the ion temperature gradient (ITG) instability using a small expensive simulation dataset
Chenguang Wan, Youngwoo Cho, Zhisong Qu +7
One of the main challenges in building high-fidelity surrogate models of tokamak turbulence is the substantial demand for high-quality data. Typically, producing high-quality data…
Reduced Kiselev black hole
Zhi-Shuo Qu, Towe Wang, Chao-Jun Feng
The Kiselev model describes a black hole surrounded by a fluid with equations of state and respectively in radial and tangential directions. It has been…
The shear Alfvén continuum with a magnetic island chain in tokamak plasmas
Zhisong Qu, Matthew Hole
The shear Alfvén continuum spectrum is studied for a tokamak with a single island chain using the ideal Magnetohydrodynamics (MHD) theory. We have taken into account the toroidal g…
Equilibrium -limits dependence on bootstrap current in classical stellarators
A. Baillod, J. Loizu, Z. Qu +2
While it is important to design stellarators with high magneto-hydrodynamic (MHD) stability -limit, it is also crucial to ensure that good magnetic surfaces exist in a large ran…
On the relationship between the multi-region relaxed variational principle and resistive inner layer theory
A. Kumar, J. Loizu, M. J. Hole +3
We show that the variational energy principle of multi-region relaxed magnetohydrodynamic (MRxMHD) model can be used to predict finite-pressure linear tearing instabilities. In thi…
On the non-existence of stepped-pressure equilibria far from symmetry
Z. S. Qu, S. R. Hudson, R. L. Dewar +2
The Stepped Pressure Equilibrium Code (SPEC) [Hudson et al., Phys. Plasmas 19, 112502 (2012)] has been successful in the construction of equilibria in 3D configurations that contai…
Quasisymmetric magnetic fields in asymmetric toroidal domains
Naoki Sato, Zhisong Qu, David Pfefferlé +1
We explore the existence of quasisymmetric magnetic fields in asymmetric toroidal domains. These vector fields can be identified with a class of magnetohydrodynamic equilibria in t…
Relaxed Magnetohydrodynamics with Ideal Ohm's Law Constraint
R. L. Dewar, Z. S. Qu
The gap between a recently developed dynamical version of relaxed magnetohydrodynamics (RxMHD) and ideal MHD (IMHD) is bridged by approximating the zero-resistivity "Ideal" Ohm's L…
Stepped pressure equilibrium with relaxed flow and applications in reversed-field pinch plasmas
Z. S. Qu, R. L. Dewar, F. Ebrahimi +3
The Multi-region Relaxed MHD (MRxMHD) has been successful in the construction of equilibria in three-dimensional (3D) configurations. In MRxMHD, the plasma is sliced into sub-volum…
Long range frequency chirping of Alfven eigenmodes
Hooman Hezaveh, Zhisong Qu, Boris N. Breizman +1
A theoretical framework has been developed for an NBI scenario to model the hard nonlinear evolution of Global Alfven Eigenmodes (GAEs) where the adiabatic motion of phase-space st…