Study of Low-Frequency Core-Edge Coupling in a Tokamak: I. Experimental Observation in KSTAR

Wonjun Lee, Andreas Bierwage, Seungmin Bong +6

Double-peaked fishbone events across multiple KSTAR discharges are investigated. The normalized beta ${\hat{I}}_{\mathrm{N}}^2$ and the edge safety factor $q_{95}$ under which the…