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Nonlinear gyrokinetic PIC simulations in stellarators with the code EUTERPE

Part of: Invited Contributions from the 18th European Fusion Theory Conference Focus on Fusion

Published online by Cambridge University Press:  17 September 2020

E. Sánchez Open the ORCID record for E. Sánchez [Opens in a new window] ,
A. Mishchenko Open the ORCID record for A. Mishchenko [Opens in a new window] ,
J. M. García-Regaña Open the ORCID record for J. M. García-Regaña [Opens in a new window] ,
R. Kleiber Open the ORCID record for R. Kleiber [Opens in a new window] ,
A. Bottino Open the ORCID record for A. Bottino [Opens in a new window] ,
L. Villard Open the ORCID record for L. Villard [Opens in a new window]  and
the W7-X team
E. Sánchez*
Affiliation:
Laboratorio Nacional de Fusión-CIEMAT, Avda. Complutense 40, 28040Madrid, Spain
A. Mishchenko
Affiliation:
Max-Planck Insitut für Plasmaphysik, D-17491Greifswald, Germany
J. M. García-Regaña
Affiliation:
Laboratorio Nacional de Fusión-CIEMAT, Avda. Complutense 40, 28040Madrid, Spain
R. Kleiber
Affiliation:
Max-Planck Insitut für Plasmaphysik, D-17491Greifswald, Germany
A. Bottino
Affiliation:
Max-Planck Insitut für Plasmaphysik, D-85748Garching, Germany
L. Villard
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center, CH-1015Lausanne, Switzerland
*
†Email address for correspondence: edi.sanchez@ciemat.es
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Abstract

In this work, the first nonlinear particle-in-cell simulations carried out in a stellarator with the global gyrokinetic code EUTERPE using adiabatic electrons and realistic plasma parameters are reported. Several studies are conducted with the aim of enabling reliable nonlinear simulations in stellarators with this code. First, EUTERPE is benchmarked against ORB5 in both linear and nonlinear settings in a tokamak configuration. Next, the use of noise control and stabilization tools, a Krook-type collision operator, markers’ weight smoothing and heating sources is investigated. It is studied in detail how these tools influence the linear growth rate of instabilities in both tokamak and stellarator geometries, and their influence on the linear zonal flow evolution in a stellarator. Then, it is studied how these tools allow improvement of the quality of the results in a set of nonlinear simulations of electrostatic turbulence in a stellarator configuration. Finally, these tools are applied to a W7-X magnetic configuration using experimental plasma parameters.

Keywords

fusion plasmaplasma instabilitiesplasma simulation
Type
Research Article
Information
Journal of Plasma Physics , Volume 86 , Issue 5 , October 2020 , 855860501
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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References

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