The EU strategy for solving the DEMO exhaust problem

H. Zohm (Corresponding author), F. Militello, T.W. Morgan, W. Morris, H. Reimerdes, M. Siccinio

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)


Exhaust of power and particles is crucial for the DEMO device and the EU has developed a strategy to address the challenges. This strategy consists of a conventional approach based on extrapolation of the ITER solution (detached lower single null divertor) as well as the development of alternatives as risk mitigation. These comprise alternative magnetic divertor geometry, liquid metal targets and intrinsically ELM-free operational scenarios. On the experimental side, the EUROfusion programme has initiated both upgrades to existing linear and toroidal devices as well as plans to engage in new devices presently under construction in the EU. In parallel, the theory and modelling efforts are ramped up in a targeted effort to obtain the necessary understanding for safe extrapolation to DEMO. This is especially important for the alternatives, which cannot be tested in ITER.

Original languageEnglish
Article number112307
Number of pages8
JournalFusion Engineering and Design
Publication statusPublished - May 2021

Bibliographical note

Funding Information:
The work presented in this paper is carried out within the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020under grant agreement No 633053, but does not necessarily represent the views or opinions of the European Commission. HZ gratefully acknowledges enlightening discussions with A. Manhard (IPP).


  • DEMO
  • ITER
  • Plasma exhaust
  • Tokamak


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