Systematic multi-machine analysis of the exhaust time-dependent behavior in tokamaks
Abstract The understanding of the time-scales and associated transient behavior of fusion exhaust plasmas plays a crucial role in its dynamic modeling and its control. This work presents an overview of experimental investigations of the exhaust dynamics in TCV, MAST-U, ASDEX-Upgrade, WEST, DIII-D, and JET. From the presented experiments, a clear picture arises on properties of the exhaust dynamics across machines. Particularly, we observe that the scrape-off layer equilibrates on fast time-scales ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mrow> <mml:mo>></mml:mo> </mml:mrow> </mml:mrow> </mml:math> 70 Hz) and that exhaust dynamics measured in response to gas valve modulations mostly behave smoothly and linearly, with similarities across devices, across scenarios (H-mode, L-mode), injected species, and injection locations. The measurements presented have formed the basis for systematic exhaust control on the considered devices. We now present this database for the essential validation of dynamic exhaust models for reactor design and control.
Authors
- S. Henderson (ORCID: https://orcid.org/0000-0002-8886-1256)
- B. Kool (ORCID: https://orcid.org/0000-0002-1636-7400)
- B. Sieglin (ORCID: https://orcid.org/0000-0002-9480-4434)
- Lennard Ceelen (ORCID: https://orcid.org/0000-0002-6574-1841)
- O. Kudláček (ORCID: https://orcid.org/0009-0008-0356-115X)
- D. Weldon
- D. King (ORCID: https://orcid.org/0000-0001-5128-5083)
- the WEST Team
- J.T.W. Koenders (ORCID: https://orcid.org/0000-0003-4385-923X)
- C. Galperti
- D. Valcárcel (ORCID: https://orcid.org/0000-0002-5573-2095)
- M. Lennholm (ORCID: https://orcid.org/0000-0002-3444-3999)
- Anthony Leonard
- H.J. Sun (ORCID: https://orcid.org/0000-0003-0880-0013)
- C. Theiler (ORCID: https://orcid.org/0000-0003-3926-1374)
- J. Lovell (ORCID: https://orcid.org/0000-0001-9565-3466)
- David Eldon
- M. Bernert
- A. Perek (ORCID: https://orcid.org/0000-0002-4117-0298)
- N. Fedorczak (ORCID: https://orcid.org/0000-0001-7123-7433)
- T. Ravensbergen (ORCID: https://orcid.org/0000-0001-7347-5515)
- O. Février (ORCID: https://orcid.org/0000-0002-9290-7413)
- K. Kirov
- L. Piron (ORCID: https://orcid.org/0000-0002-7928-4661)
- T. Wijkamp (ORCID: https://orcid.org/0000-0003-3110-8682)
- C.H. Vincent (ORCID: https://orcid.org/0000-0002-7227-409X)
- Kevin Verhaegh
- J. Roman
- Jelle Slief
- Gijs Lukas Derks
- Ivo Samuel Carvalho
- Himank Anand
- M van Berkel
- Egbert Westerhof
- Adam Parrot
- Thomas Bosman
- Remy Nouailletas
- Dominik Brida
- Loes Jansen
- Chris Orrico
- R.J.R. van Kampen
- Marco de Baar
- Sven Wiesen
- Nicola Lonigro
- Tuomas J J Tala
- Basil P Duval
- Holger Reimerdes
- the TCV Team
- the AUG Team
- the DIII-D Team
- the JET Team
- the EUROfusion Tokamak Exploitation Team
Institutions
- ITER (FR)
- Oak Ridge National Laboratory (US)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Culham Centre for Fusion Energy (GB)
- CEA Cadarache (FR)
- Max Planck Institute for Plasma Physics (DE)
- Dutch Institute for Fundamental Energy Research (NL)
- École Polytechnique Fédérale de Lausanne (CH)
- University of York (GB)
- General Atomics (United States) (US)
- Eindhoven University of Technology (NL)
- VTT Technical Research Centre of Finland (FI)
Publication Details
- Journal
- Nuclear Fusion
- Published
- 2025-12-24
- DOI
- https://doi.org/10.1088/1741-4326/ae30f1
- Citations
- 1
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 1.87