Error estimates of some splitting schemes for charged-particle dynamics under strong magnetic field

B Wang, X Zhao - SIAM Journal on Numerical Analysis, 2021 - SIAM
In this work, we consider the error estimates of some splitting schemes for the charged-
particle dynamics under a strong magnetic field. We first propose a novel energy-preserving …

Geometric two-scale integrators for highly oscillatory system: uniform accuracy and near conservations

B Wang, X Zhao - SIAM Journal on Numerical Analysis, 2023 - SIAM
In this paper, we consider a class of highly oscillatory Hamiltonian systems which involve a
scaling parameter. The problem arises from many physical models in some limit parameter …

Hamiltonian Particle-in-Cell methods for Vlasov–Poisson equations

A Gu, Y He, Y Sun - Journal of Computational Physics, 2022 - Elsevier
In this paper, Particle-in-Cell algorithms for the Vlasov–Poisson system are presented based
on its Poisson bracket structure. The Poisson equation is solved by finite element methods …

An implicit, conservative and asymptotic-preserving electrostatic particle-in-cell algorithm for arbitrarily magnetized plasmas in uniform magnetic fields

G Chen, L Chacón - Journal of Computational Physics, 2023 - Elsevier
We introduce a new electrostatic particle-in-cell algorithm capable of using large timesteps
compared to particle gyro-period under a uniform external magnetic field. The algorithm …

Large-stepsize integrators for charged-particle dynamics over multiple time scales

E Hairer, C Lubich, Y Shi - Numerische Mathematik, 2022 - Springer
The Boris algorithm, a closely related variational integrator and a newly proposed filtered
variational integrator are studied when they are used to numerically integrate the equations …

Semi-discretization and full-discretization with improved accuracy for charged-particle dynamics in a strong nonuniform magnetic field

B Wang, Y Jiang - ESAIM: Mathematical Modelling and Numerical …, 2023 - esaim-m2an.org
The aim of this paper is to formulate and analyze numerical discretizations of charged-
particle dynamics (CPD) in a strong nonuniform magnetic field. A strategy is firstly performed …

Structure-Preserving Algorithm and Its Error Estimate for the Relativistic Charged-Particle Dynamics Under the Strong Magnetic Field

R Zhang, T Liu, B Wang, J Liu, Y Tang - Journal of Scientific Computing, 2024 - Springer
This paper investigates the numerical algorithm and its error estimates for the dynamics of
relativistic charged particles under a strong maximal ordering scaling magnetic field. To …

Derivative-free high-order uniformly accurate schemes for highly oscillatory systems

P Chartier, M Lemou, F Méhats… - IMA Journal of Numerical …, 2022 - academic.oup.com
In this paper we address the computational aspects of uniformly accurate numerical
methods for solving highly oscillatory evolution equations. In particular, we introduce an …

Asymptotic-preserving gyrokinetic implicit particle-orbit integrator for arbitrary electromagnetic fields

LF Ricketson, L Chacón - Journal of Computational Physics, 2024 - Elsevier
We extend the asymptotic preserving and energy conserving time integrator for charged-
particle motion developed in [Ricketson & Chacón, JCP, 2020] to include finite Larmor …

Discrete moments models for Vlasov equations with non constant strong magnetic limit

F Charles, B Després, R Dai… - Comptes …, 2023 - comptes-rendus.academie-sciences …
We describe the structure of an original application of the method of moments to the Vlasov–
Poisson system with non constant strong magnetic field in three dimensions of space. Using …