The soft x-ray diagnostic is suitable for monitoring plasma activity in the tokamak core, e.g., sawtooth instability. Moreover, spatially resolved measurements can provide information about plasma position and shape, which can supplement magnetic measurements. In this contribution, fast algorithms with the potential for a real-time use are tested on the data from the COMPASS tokamak. In addition, the soft x-ray data are compared with data from other diagnostics in order to discuss possible connection between sawtooth instability on one side and the transition to higher confinement mode, edge localized modes and productions of runaway electrons on the other side.

ENS Cachan Paris France

Faculty of Nuclear Sciences and Physical Engineering Czech Technical University Prague Prague Czech Republic

Institue Jean Lamour Université de Lorraine Nancy France

Institute of Plasma Physics ASCR Prague Czech Republic

Max Planck Institut für Plasmaphysik Garching Germany

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