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Article Dans Une Revue Nuclear Fusion Année : 2024

Poloidal localization of the explosive onset of edge localized modes

P. Hennequin
B. Vanovac

Résumé

In ASDEX Upgrade lower single null H-mode plasmas, the onset of the explosive phase of Edge Localized Modes (ELMs) is poloidally localized in the X-point/outer strike point (X/OSP) region. From this location, ELMs develop on average towards the low-field and high-field sides in typically 100 μ s . An associated magnetic activity localized in the X/OSP region is also observed in-between ELMs, at a lower level than at the ELM onset, and interpreted as being due to perturbed currents connected to the divertor target-s. Its broadband spectra typically extend up to 100 k H z –due to short-lived events of variable frequencies–and are dominated by n = 1 toroidal mode numbers rotating in the counter-current direction.
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Dates et versions

hal-04415010 , version 1 (24-01-2024)

Identifiants

Citer

E. Trier, P. Hennequin, M. Maraschek, L. Giannone, B. Vanovac. Poloidal localization of the explosive onset of edge localized modes. Nuclear Fusion, 2024, 64 (2), pp.026004. ⟨10.1088/1741-4326/ad13ae⟩. ⟨hal-04415010⟩
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