A self-consistent Hamiltonian model of the ponderomotive force and its structure preserving discretization
William Barham, Yaman Güçlü, Philip J. Morrison, Eric Sonnendrücker
Abstract
In the presence of an inhomogeneous oscillatory electric field, charged particles experience a net force, averaged over the oscillatory timescale, known as the ponderomotive force. We derive a one-dimensional Hamiltonian model which self-consistently couples the electromagnetic field to a plasma which experiences the ponderomotive force. We derive a family of structure preserving discretizations of the model of varying order in space and time using conforming and broken finite element exterior calculus spectral element methods. In all variants of our discretization framework, the method is found to conserve the Casimir invariants of the continuous model to machine precision and the energy to the order of the splitting method used.
BibTeX
@article{Barham_2024,
title={A self-consistent Hamiltonian model of the ponderomotive force and its structure preserving discretization},
volume={31},
ISSN={1089-7674},
url={http://dx.doi.org/10.1063/5.0178935},
DOI={10.1063/5.0178935},
number={1},
journal={Physics of Plasmas},
publisher={AIP Publishing},
author={Barham, William and Güçlü, Yaman and Morrison, Philip J. and Sonnendrücker, Eric},
year={2024},
month=jan }