The model of synchronization between internal reconnections and edge-localized modes
V. V. Bulanin, Г. С. Курскиев, В. В. Солоха, A. Yu. Yashin, N. S. Zhiltsov
Abstract
Abstract A new model for interaction between the internal reconnections caused by sawtooth and the edge-localized modes (ELM) was presented. The experimental evidence of the coupling between sawtooth crash and ELM events were observed in the Globus-M and Globus-M2 tokamaks. The numerical analysis of magnetic equilibrium showed that internal reconnections can induce the excess current density near the separatrix during the several hundreds of μ s. The excess current destabilizes the peeling-ballooning (PB) instability. The PB stability analysis showed that the penetration depth of the induced current should be in the range of ψ norm = 0.8–0.95 to trigger the instability.