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Runaway electrons (RE) generated during disruption are identified as a major issue for ITER and reactor-size tokamaks. A seed of decoupled electrons is produced in the plasma core at thermal quench of the disruption when the current profile flattens due to high MHD activity. These RE are then accelerated by the toroidal electric field associated to the plasma current quench (CQ) up to relativistic energy. They initiate second RE generation during current quench (CQ) due to the avalanchingdoi:10.13182/fst13-a24090 fatcat:twsftilvhzdxvksuevepocb33e