Dynamics and dependencies of the configuration-dependent 1–2 kHz fluctuation in W7-X

• Published in: Nuclear Materials and Energy
• Main Authors: S.B. Ballinger, J.L. Terry, S.G. Baek, M. Beurskens, K.J. Brunner, G. Fuchert, J. Knauer, C. Killer, E. Pasch, K. Rahbarnia, J. Schilling, E. Scott, A. von Stechow, H. Thomsen, O. Grulke, G. Wurden, G. Kocsis, T. Szepesi, L. Zsuga
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2021
• Subjects: Nuclear engineering. Atomic power; TK9001-9401; Langmuir; Edge Island
• Online Access: https://doi.org/10.1016/j.nme.2021.100967; https://doaj.org/article/e8ba88fd95c847acb345353c250655b0

A 1–2 kHz electromagnetic mode is present in a large fraction of W7-X discharges in the standard magnetic field configurations with 5/5 edge island structure. The power in the mode is significantly reduced in other magnetic configurations. The mode can appear spontaneously and persist for the full d...