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Updated: Jun 2, 2026

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
Direct observation of current in type-I edge-localized-mode filaments on the ASDEX Upgrade tokamak
N Vianello1, V Naulin, R Schrittwieser
1Consorzio RFX, Associazione Euratom-ENEA sulla Fusione, Padova, Italy.
Abstract:
Magnetically confined plasmas in the high confinement regime are regularly subjected to relaxation oscillations, termed edge localized modes (ELMs), leading to large transport events. Present ELM theories rely on a combined effect of edge current and the edge pressure gradients which result in intermediate mode number (n≅10-15) structures (filaments) localized in the perpendicular plane and extended along the field lines. By detailed localized measurements of the magnetic field perturbation associated to type-I ELM filaments, it is shown that these filaments carry a substantial current.
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