Description
Authors: M. van Berkel*, G.L. Derks, L. Ceelen, T.O.S.J. Bosman, B. Kool, T. Ravensbergen, J.T.W. Koenders, C. Orrico, L.L.T.C. Jansen, J.J. Palacios Roman, A. Perek, H. Anand, M.R. de Baar, M. Bernert, D. Brida, I.S. Carvalho, B.P. Duval, D. Eldon, N. Fedorczak, O. Février, C. Galperti, S.S. Henderson, R.J.R. van Kampen, D. King, K. Kirov, O. Kudlácek, M. Lennholm, A. Leonard, N. Lonigro, J. Lovell, R. Nouailletas, A. Parrott, L. Pirona, H. Reimerdes, B. Sieglin, J. Slief, H. Sun, T. Tala, C. Theiler, D. Valcarcel, K. Verhaegh, C. Vincent, D. Weldon, E. Westerhof, T.A. Wijkamp, S. Wiesen, the EUROfusion Tokamak Exploitation Team, the AUG Team, the DIII-D Team, the JET Team, the MAST-U Team, the TCV Team and the WEST Team
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.
https://iopscience.iop.org/article/10.1088/1741-4326/ae30f1