(2019) Orb5: A global electromagnetic gyrokinetic code using the PIC approach in toroidal geometry. Computer Physics Communications . p. 107072. doi:10.1016/j.cpc.2019.107072 (In Press)

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Abstract

This paper presents the current state of the global gyrokinetic code Orb5 as an update of the previous reference (Jolliet et al., 2007). The Orb5 code solves the electromagnetic Vlasov-Maxwell system of equations using a PIC scheme and also includes collisions and strong flows. The code assumes multiple gyrokinetic ion species at all wavelengths for the polarization density and drift-kinetic electrons. Variants of the physical model can be selected for electrons such as assuming an adiabatic response or a “hybrid” model in which passing electrons are assumed adiabatic and trapped electrons are drift-kinetic. A Fourier filter as well as various control variates and noise reduction techniques enable simulations with good signal-to-noise ratios at a limited numerical cost. They are completed with different momentum and zonal flow-conserving heat sources allowing for temperature-gradient and flux-driven simulations. The code, which runs on both CPUs and GPUs, is well benchmarked against other similar codes and analytical predictions, and shows good scalability up to thousands of nodes.

Item Type:	Journal Article
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science > Physics
SWORD Depositor:	Library Publications Router
Library of Congress Subject Headings (LCSH):	Tokamaks, Plasma turbulence, Physics -- Computer programs
Journal or Publication Title:	Computer Physics Communications
Publisher:	Elsevier
ISSN:	0010-4655
Official Date:	30 November 2019
Dates:	Date Event 30 November 2019 Published 20 November 2019 Accepted
Date of first compliant deposit:	10 February 2020
Page Range:	p. 107072
DOI:	10.1016/j.cpc.2019.107072
Status:	Peer Reviewed
Publication Status:	In Press
Access rights to Published version:	Restricted or Subscription Access
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID ID s760 Centro Svizzero di Calcolo Scientifico http://viaf.org/viaf/135813097 633053 H2020 Euratom http://dx.doi.org/10.13039/100010687 UNSPECIFIED Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung UNSPECIFIED

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