5 citations · 5 across the 12 of their papers we have counts for
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Geometric numerical discretization of a quasineutral hybrid model of drift-kinetic electrons and fully kinetic ions
Nishant Narechania, Guo Meng, Emil Poulsen +1
We extend the geometric electromagnetic particle-in-cell (PIC) framework, GEMPICX, to solve the quasineutral hybrid Vlasov-Maxwell equations with drift-kinetic electrons and fully…
Suppressed Stiffness of energetic particle transport due to thermal plasma nonlinearity in tokamak plasmas
Guo Meng, Zhixin Lu, Gengxian Li
Energetic particle (EP) transport stiffness plays a crucial role in determining EP confinement in tokamak plasmas. This work investigates the impact of nonlinear thermal plasma dyn…
Gyrokinetic global simulation of Alfvenic ion temperature gradient mode in reversed magnetic shear
Gengxian Li, Zhixin Lu, Philipp Lauber +3
In this work, a systematic study of electromagnetic instabilities driven by the temperature gradient in magnetically confined fusion plasmas with reversed magnetic shear is conduct…
A quasi-neutral electromagnetic hybrid model with drift-kinetic electrons and fully kinetic ions
Guo Meng, Nishant Narechania, Eric Sonnendrücker
In this work, we propose a hybrid model that combines drift-kinetic electrons with fully kinetic ions under the quasi-neutrality assumption, discretized using a geometric particle-…
A High-order piecewise field-aligned triangular finite element method for electromagnetic gyrokinetic particle simulations of tokamak plasmas with open field lines
Zhixin Lu, Guo Meng, Eric Sonnendruecker +6
A high-order piecewise field-aligned triangular finite element method is developed and implemented for global electromagnetic gyrokinetic particle-in-cell simulations of tokamak pl…
Generalized mixed variable-pullback scheme with non-ideal Ohm's law for electromagnetic gyrokinetic simulations
Zhixin Lu, Guo Meng, Roman Hatzky +3
In this work, the non-ideal Ohm's law is integrated in the mixed variable-pullback scheme for the gyrokinetic particle simulations. This scheme captures the evolution of the symple…
TRIMEG-GKX: an electromagnetic gyrokinetic particle code with a Piecewise Field-Aligned Finite Element Method for Micro- and Macro-Instability Studies in Tokamak Core Plasmas
Zhixin Lu, Guo Meng, Roman Hatzky +2
The features of the TRIMEG-GKX code are described with emphasis on the exploration using novel/different schemes compared to other gyrokinetic codes, particularly the use of object…
Piecewise Field-Aligned Finite Element Method for Multi-Mode Nonlinear Particle Simulations in tokamak plasmas
Zhixin Lu, Guo Meng, Eric Sonnendrücker +5
This paper presents a novel approach for simulating plasma instabilities in tokamak plasmas using the piecewise field-aligned finite element method in combination with the particle…
Gyrokinetic Electromagnetic Particle Simulations in Triangular Meshes with C1 Finite Elements
Zhixin Lu, Guo Meng, Roman Hatzky +6
The triangular mesh-based gyrokinetic scheme enables comprehensive axis-to-edge studies across the entire plasma volume. Our approach employs triangular finite elements with first-…
Energetic particles transport in constants of motion space due to collisions in tokamak plasmas
Guo Meng, Philipp Lauber, Zhixin Lu +2
The spatio-temporal evolution of the energetic particles in the transport time scale in tokamak plasmas is a key issue of the plasmas confinement, especially in burning plasmas. In…
High-order stochastic integration schemes for the Rosenbluth-Trubnikov collision operator in particle simulations
Zhixin Lu, Guo Meng, Tomasz Tyranowski +1
In this study, we consider a numerical implementation of the nonlinear Rosenbluth-Trubnikov collision operator for particle simulations in plasma physics in the framework of the fi…
Mode structure symmetry breaking of reversed shear Alfvén eigenmodes and its impact on the generation of parallel velocity asymmetries in energetic particle distribution
Guo Meng, Philipp Lauber, Xin Wang +1
In this work, the gyrokinetic eigenvalue code LIGKA, the drift-kinetic/MHD hybrid code HMGC and the gyrokinetic full-f code TRIMEG-GKX are employed to study the mode structure deta…