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Transient versus steady-state solutions: a qualitative study

Part of: Invited Contributions from the 20th European Fusion Theory Conference

Published online by Cambridge University Press:  27 March 2024

D. Van Eester Open the ORCID record for D. Van Eester [Opens in a new window] ,
E.A. Lerche Open the ORCID record for E.A. Lerche [Opens in a new window] ,
E. Pawelec Open the ORCID record for E. Pawelec [Opens in a new window]  and
E. Solano Open the ORCID record for E. Solano [Opens in a new window]
D. Van Eester*
Affiliation:
Laboratory for Plasma Physics, ERM-KMS, B-1000 Brussels, Belgium
E.A. Lerche
Affiliation:
Laboratory for Plasma Physics, ERM-KMS, B-1000 Brussels, Belgium JET, Culham Science Centre, Abingdon OX14 3DB, UK
E. Pawelec
Affiliation:
JET, Culham Science Centre, Abingdon OX14 3DB, UK
E. Solano
Affiliation:
Laboratorio Nacional de Fusión, CIEMAT, 28040 Madrid, Spain
*
†Email address for correspondence: d.van.eester@fz-juelich.de
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Abstract

In view of the ultimate goal of producing long-lasting quasi-stationary discharges required for future fusion power stations, the numerical study of steady-state solutions of equations describing the particle and energy balance rightfully gets ample attention. Transient states may, however, differ significantly from the steady state ultimately reached and will – in practice – impact on the actual fate of the discharge. Using brutally simple models, the present paper highlights a number of aspects to illustrate this dynamics. It e.g. shows the different signature of wave and beam heating, potentially giving room to transiently trigger desirable effects that may allow us to better steer a discharge.

Keywords

plasma heatingfusion plasmaplasma simulation
Type
Research Article
Information
Journal of Plasma Physics , Volume 90 , Issue 2 , April 2024 , 995900201
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Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press

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