Performance of the BGSDC integrator for computing fast ion trajectories in nuclear fusion reactors

Tretiak, Krasymyr; Buchanan, J.; Akers, R.; Ruprecht, Daniel

doi:10.1016/j.cpc.2021.107876

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…They show that the resulting BGSDC method can deliver improvements in performance over the standard Boris method when simulating fast ions in idealised magnetic fields. In 2021 they extended these results, showing that BGSDC can improve performance for large ensembles of particles and realistic equilibrium fields of the DIIID and JET Tokamak fusion reactor [35]. However, these three studies consider only non-relativistic cases where particles travel passively through an EM-field guiding them.…”

Section: Introductionmentioning

confidence: 98%

New applications for the Boris Spectral Deferred Correction algorithm for plasma simulations

Smedt,

Ruprecht,

Niesen

et al. 2021

Preprint

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The paper investigates two new use cases for the Boris Spectral Deferred Corrections (Boris-SDC) time integrator for plasma simulations. First, we show that using Boris-SDC as a particle pusher in an electrostatic particle-in-cell (PIC) code can, at least in the linear regime, improve simulation accuracy compared with the standard second order Boris method. In some instances, the higher order of Boris-SDC even allows a much larger time step, leading to modest computational gains. Second, we propose a modification of Boris-SDC for the relativistic regime. Based on an implementation of Boris-SDC in the RUNKO PIC code, we demonstrate for a relativistic Penning trap that Boris-SDC retains its high order of convergence for velocities ranging from 0.5c to > 0.99c. We also show that for the force-free case where acceleration from electric and magnetic field cancel, Boris-SDC produces less numerical drift than Boris.

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Section: Introductionmentioning

confidence: 98%