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Nonlinear interaction of Alfvénic instabilities and turbulence via the modification of the equilibrium profiles

Published online by Cambridge University Press:  21 November 2023

A. Biancalani Open the ORCID record for A. Biancalani [Opens in a new window] ,
A. Bottino Open the ORCID record for A. Bottino [Opens in a new window] ,
D. Del Sarto Open the ORCID record for D. Del Sarto [Opens in a new window] ,
M.V. Falessi Open the ORCID record for M.V. Falessi [Opens in a new window] ,
T. Hayward-Schneider Open the ORCID record for T. Hayward-Schneider [Opens in a new window] ,
P. Lauber ,
A. Mishchenko Open the ORCID record for A. Mishchenko [Opens in a new window] ,
B. Rettino ,
J.N. Sama Open the ORCID record for J.N. Sama [Opens in a new window]  and
F. Vannini
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A. Biancalani*
Affiliation:
Léonard de Vinci Pôle Universitaire, Research Center, 92916 Paris La Défense, France
A. Bottino
Affiliation:
Max-Planck Institute for Plasma Physics, 85748 Garching, Germany
D. Del Sarto
Affiliation:
Institut Jean Lamour – UMR 7168, University of Lorraine – BP 239, F-54506 Vandoeuvre les Nancy, France
M.V. Falessi
Affiliation:
Center for Nonlinear Plasma Science and ENEA C. R. Frascati, 00044 Frascati, Italy
T. Hayward-Schneider
Affiliation:
Max-Planck Institute for Plasma Physics, 85748 Garching, Germany
P. Lauber
Affiliation:
Max-Planck Institute for Plasma Physics, 85748 Garching, Germany
A. Mishchenko
Affiliation:
Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
B. Rettino
Affiliation:
Max-Planck Institute for Plasma Physics, 85748 Garching, Germany
J.N. Sama
Affiliation:
Institut Jean Lamour – UMR 7168, University of Lorraine – BP 239, F-54506 Vandoeuvre les Nancy, France
F. Vannini
Affiliation:
Max-Planck Institute for Plasma Physics, 85748 Garching, Germany
L. Villard
Affiliation:
Ecole Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland
X. Wang
Affiliation:
Max-Planck Institute for Plasma Physics, 85748 Garching, Germany
F. Zonca
Affiliation:
Center for Nonlinear Plasma Science and ENEA C. R. Frascati, 00044 Frascati, Italy Institute for Fusion Theory and Simulation and Department of Physics, Zhejiang University, 310027 Hangzhou, PR China
*
†Email address for correspondence: alessandro.biancalani@devinci.fr
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Abstract

Nonlinear simulations of Alfvén modes (AMs) driven by energetic particles (EPs) in the presence of turbulence are performed with the gyrokinetic particle-in-cell code ORB5. The AMs carry a heat flux, and consequently they nonlinearly modify the plasma temperature profiles. The isolated effect of this modification on the dynamics of turbulence is studied by means of electrostatic simulations. We find that turbulence is reduced when the profiles relaxed by the AM are used, with respect to the simulation where the unperturbed profiles are used. This is an example of indirect interaction of EPs and turbulence. First, an analytic magnetic equilibrium with circular concentric flux surfaces is considered as a simplified example for this study. Then, an application to an experimentally relevant case of ASDEX Upgrade is discussed.

Keywords

plasma instabilities

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Type
Research Article
Information
Journal of Plasma Physics , Volume 89 , Issue 6 , December 2023 , 905890602
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Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press

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