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Electrostatic gyrokinetic simulations in Wendelstein 7-X geometry: benchmark between the codes stella and GENE

Published online by Cambridge University Press:  10 June 2022

A. González-Jerez Open the ORCID record for A. González-Jerez [Opens in a new window] ,
P. Xanthopoulos Open the ORCID record for P. Xanthopoulos [Opens in a new window] ,
J.M. García-Regaña Open the ORCID record for J.M. García-Regaña [Opens in a new window] ,
I. Calvo Open the ORCID record for I. Calvo [Opens in a new window] ,
J. Alcusón Open the ORCID record for J. Alcusón [Opens in a new window] ,
A. Bañón Navarro Open the ORCID record for A. Bañón Navarro [Opens in a new window] ,
M. Barnes Open the ORCID record for M. Barnes [Opens in a new window] ,
F.I. Parra Open the ORCID record for F.I. Parra [Opens in a new window]  and
J. Geiger Open the ORCID record for J. Geiger [Opens in a new window]
A. González-Jerez*
Affiliation:
Laboratorio Nacional de Fusión, CIEMAT, 28040 Madrid, Spain
P. Xanthopoulos
Affiliation:
Max-Planck Institut für Plasmaphysik, 17491 Greifswald, Germany
J.M. García-Regaña
Affiliation:
Laboratorio Nacional de Fusión, CIEMAT, 28040 Madrid, Spain
I. Calvo
Affiliation:
Laboratorio Nacional de Fusión, CIEMAT, 28040 Madrid, Spain
J. Alcusón
Affiliation:
Max-Planck Institut für Plasmaphysik, 17491 Greifswald, Germany
A. Bañón Navarro
Affiliation:
Max-Planck Institut für Plasmaphysik, 85748 Garching, Germany
M. Barnes
Affiliation:
Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3PU, UK
F.I. Parra
Affiliation:
Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3PU, UK
J. Geiger
Affiliation:
Max-Planck Institut für Plasmaphysik, 17491 Greifswald, Germany
*
†Email address for correspondence: AntonioG@ciemat.es
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Abstract

The first experimental campaigns have proven that, due to the optimization of the magnetic configuration with respect to neoclassical transport, the contribution of turbulence is essential to understand and predict the total particle and energy transport in Wendelstein 7-X (W7-X). This has spurred much work on gyrokinetic modelling for the interpretation of the available experimental results and for the preparation of the next campaigns. At the same time, new stellarator gyrokinetic codes have just been or are being developed. It is therefore desirable to have a sufficiently complete, documented and verified set of gyrokinetic simulations in W7-X geometry against which new codes or upgrades of existing codes can be tested and benchmarked. This paper attempts to provide such a set of simulations in the form of a comprehensive benchmark between the recently developed code stella and the well-established code GENE. The benchmark consists of electrostatic gyrokinetic simulations in the W7-X magnetic geometry and includes different flux tubes, linear ion-temperature-gradient (ITG) and trapped-electron-mode stability analyses, computation of linear zonal-flow responses and calculation of ITG-driven heat fluxes.

Keywords

fusion plasmaplasma instabilitiesplasma simulation
Type
Research Article
Information
Journal of Plasma Physics , Volume 88 , Issue 3 , June 2022 , 905880310
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Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press

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