Edge Localised Mode, ELM

An instability which occurs in short periodic bursts during the H-mode in divertor tokamaks. It causes sudden outbursts of the plasma thus expelling particles and depositing large heat flux onto the vessel wall. The plasma loses severe amounts of energy. In high-power fusion devices such as ITER or DEMO, ELMs are so powerful that they will cause erosion at the vessel wall. Finding methods to mitigate or supress ELMs is therefore a hot topic in current fusion research.

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

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