2 research outputs found
Arbitrarily high-order energy-preserving methods for simulating the gyrocenter dynamics of charged particles
Gyrocenter dynamics of charged particles plays a fundamental role in plasma
physics. In particular, accuracy and conservation of energy are important
features for correctly performing long-time simulations. For this purpose, we
here propose arbitrarily high-order energy conserving methods for its
simulation. The analysis and the efficient implementation of the methods are
fully described, and some numerical tests are reported.Comment: 23 pages, 4 figure
Long term analysis of splitting methods for charged-particle dynamics
In this paper, we rigorously analyze the energy, momentum and magnetic moment
behaviours of two splitting methods for solving charged-particle dynamics. The
near-conservations of these invariants are given for the system under constant
magnetic field or quadratic electric potential. By the approach named as
backward error analysis, we derive the modified equations and modified
invariants of the splitting methods and based on which, the near-conservations
over long times are proved. Some numerical experiments are presented to
demonstrate these long time behaviours