Systematic multi-machine analysis of the exhaust time-dependent behavior in tokamaks

ORAL

Abstract

This work presents an overview of experimental investigations of the exhaust dynamics in TCV, MAST-U, ASDEX-Upgrade, WEST, DIII-D, and JET. Using various different perturbations such as gas-injection, impurity injection, and power modulations and corresponding responses on various outputs is analyzed. From these 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 and strong similarities across scenarios (H-mode, L-mode), injected species, and injection locations. On the other hand, we see clear differences when analyzing different exhaust properties. This is all summarized in a database that is for the validation of dynamic exhaust models for reactor design. Moreover, some measurements presented have formed the basis for systematic exhaust control on the considered devices.

*This work was supported in part by the Swiss National Science Foundation. The Swiss contribution to thiswork has been funded by the Swiss State Secretariat for Education, Research and Innovation (SERI).This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053.This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences, using the DIII-D National Fusion Facility, a DOE Office of Science user facility, under Award(s) DE-FC02-04ER54698.This publication is part of the project Balls-to-the-wall: Keeping Hydrogen Burning with Ice Bullets (project no. 19695) of the NWO Talent Programme VIDI, financed partly by the Dutch Research Council (NWO). DIFFER is part of the institute's organization of NWO.This work was supported by the U.S. Department of Energy under Grant No. DE-AC05-00OR22725.The views and opinions expressed are those of the author(s) only and not of any other funding organization.

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Publication: Systematic multi-machine analysis of the exhaust time-dependent behavior in tokamaks" by van Berkel, M; Derks, Gijs; Ceelen, Lennard; Bosman, Thomas; Kool, Bob; Ravensbergen, Timo; Koenders, Jesse; Orrico, Chris; Jansen, Loes; Palacios Roman, Juan Javier; Perek, Artur; Anand, Himank; de Baar, Marco; Bernert, Matthias; Brida, Dominik; Carvalho, Ivo; Duval, Basil; Eldon, David; Fedorczak, Nicolas; Février, Olivier; Galperti, Cristian; Henderson, Stuart; Kampen, R.J.R.; King, Damian; Kirov, Krassimir K. ; Kudlacek, Ondrej; Lennholm, Morten; Leonard, Anthony; Lonigro, Nicola; Lovell, Jack; Nouailletas, Remy; Parrot, Adam; Piron, Lidia; Reimerdes, Holger; Sieglin, Bernhard; Slief, Jelle; Sun, Hongjuan; Tala, Tuomas; Theiler, Christian; Valcarcel, Daniel; Verhaegh, Kevin; Vincent, Charles; Weldon, David; Westerhof, Egbert; Wijkamp, Tijs; Wiesen, Sven
Article reference: NF-108145 (submitted)

Presenters

  • Matthijs Van Berkel

    • DIFFER - Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ Eindhoven, the Netherlands
    • Dutch Institute for Fundamental Energy Research (DIFFER)

Authors

  • Matthijs Van Berkel

    • DIFFER - Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ Eindhoven, the Netherlands
    • Dutch Institute for Fundamental Energy Research (DIFFER)