18 citations · 36 across the 16 of their papers we have counts for
17 papers
Minute-Scale High-Fidelity Gyrokinetic Simulations with Portability from Laptop to Supercomputer
Jian Bao, Huasheng Xie, Ming Yang +4
Global gyrokinetic particle simulations remain computationally expensive, as they demand both adequate marker statistics and three-dimensional field solvers. In this work, we prese…
Linear Gyrokinetic Simulations of Micro-tearing Mode: Local versus Global
Yifei Liu, Haotian Chen, Yao Yao +3
A systematic comparison of local and global linear gyrokinetic simulations of micro-tearing modes (MTMs) is performed using the GENE code. The analysis spans diverse plasma paramet…
Implicit discretization schemes for full-kinetic ion and drift-kinetic electron simulations
Zilong Li, Yang Chen, Haotian Chen +3
We present a new electromagnetic plasma simulation model with full-kinetic ions and drift-kinetic electrons. This model (termed as FIDES) solves the electric field using the implic…
On the electromagnetic effects of collisionless trapped-electron modes
Yao Yao, Haotian Chen, Yang Chen +2
We present a linear gyrokinetic theory for the electromagnetic collisionless trapped-electron mode (CTEM). It is found that the weak electromagnetic effects of CTEMs originate from…
Low-dimensional geometry learning for turbulence prediction in optimized stellarators
Xishuo Wei, Handi Huang, Haotian Chen +4
The optimized stellarator is an attractive concept for which the averaged particle radial drift is zero, and the single particle loss can be significantly reduced. But for the reac…
Discovery of Density Limit Disruption Induced by Core-localized Alfvnic Ion Temperature Gradient Instabilities in a Tokamak Plasma
Wei Chen, Liwen Hu, Jianqiang Xu +17
To achieve a high energy gain, the fusion reactor plasma must reach a very high density. However, the tokamak plasmas ofen undergo disruption when the density exceeds the Greenwald…
Global linear drift-wave eigenmode structures on flux surfaces in stellarators: ion temperature gradient mode
Hongxuan Zhu, H. Chen, Z. Lin +1
Turbulent transport greatly impacts the performance of stellarator magnetic confinement devices. While significant progress has been made on the numerical front, theoretical unders…
Geometry effects on zonal flow dynamics and turbulent transport in optimized stellarators
Haotian Chen, Xishuo Wei, Hongxuan Zhu +1
Global gyrokinetic simulations find a strong suppression of ion temperature gradient (ITG) turbulence by zonal flows in stellarators optimized for neoclassical transport. The reduc…
A kinetic CMA diagram
Zilong Li, Haotian Chen, Zhe Gao +1
We present a kinetic Clemmow-Mullaly-Allis (CMA) diagram by systematically analysing the kinetic effects on the wave propagation in a homogeneous thermal plasma. The differences be…
Linear gyrokinetic simulation of kinetic infernal mode
Gengxian Li, Haotian Chen, Yong Xiao
Kinetic infernal mode (KIM) is an electromagnetic instability driven by thermal ions in weak magnetic shear region with a frequency similar to the kinetic ballooning mode (KBM). Gy…
On Validity of Gyrokinetic Theory
Haotian Chen, Liu Chen, Fulvio Zonca +2
We study the validity of gyrokinetic theory by examining the destruction of magnetic moment adiabatic invariant in the presence of fluctuations. Contrary to common assertions, it i…
Zonal Flow Excitation in Electron-Scale Tokamak Turbulence
Stefan Tirkas, Haotian Chen, Gabriele Merlo +2
The derivation of an intermediate-scale gyrokinetic-electron theory in nonuniform tokamak plasmas [Chen H. et al 2021 Nucl. Fusion 61 066017] has shown that a Navier-Stokes type no…
Gyrokinetic Theory of Low-frequency Electromagnetic Waves in Finite- Anisotropic Plasmas
Haotian Chen, Liu Chen
We present a gyrokinetic theory for the electromagnetic waves and instabilities with frequencies much lower than the ion cyclotron frequency in finite- anisotropic uniform plasm…
How Zonal Flow Affects Trapped Electron Driven Turbulence in Tokamaks
Haotian Chen, Liu Chen
The role of self-generated zonal flows in the collisionless trapped-electron mode (CTEM) turbulence is a long-standing open issue in tokamak plasmas. Here we show, for the first ti…
Formulation and verification of multiscale gyrokinetic simulation of kinetic-MHD processes in toroidal plasmas
Xishuo Wei, Pengfei Liu, Gyungjin Choi +11
A comprehensive gyrokinetic simulation model has been implemented in the global toroidal gyrokinetic code (GTC) and verified for studying low-frequency waves and turbulence in magn…
A Gyrokinetic Simulation Model for Low Frequency Electromagnetic Fluctuations in Magnetized Plasmas
Liu Chen, Haotian Chen, Fulvio Zonca +1
We present a new model for simulating the electromagnetic fluctuations with frequencies much lower than the ion cyclotron frequency in plasmas confined in general magnetic configur…
Excitation of Zonal Flow by Intermediate-Scale Toroidal Electron Temperature Gradient Turbulence
Haotian Chen, Stefan Tirkas, Scott E. Parker
We show that zonal flow can be preferentially excited by intermediate-scale toroidal electron temperature gradient (ETG) turbulence in tokamak plasmas. Previous theoretical studies…