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In the development of a reactor based on controlled nuclear fusion, the tokmak is currently the most advanced concept. The twisting of the magnetic field lines ensures that in normal operation the hot plasma from the inner zone is confined on magnetic flux surfaces and only diffuses very slowly into the walls. A ver disturbing exception to this normal case is disruptions where the magnetic confinement of the hot plasma suddenly collapses. The collapse of the plasma flux induces fluxes in the mechanical components and the associated forces may lead to destruction at the tokamak. Impingement of the particles previously enclosed by the magnetic field on the wall materials leads, moreover, to high heat fluxes so that particularly exposed wall materials may melt or partially vaporize.

Additional information

Authors: GREWE T, Forshungzentrum Julich, Julich (DE)
Bibliographic Reference: Report: Berichte des Forschungzentrums Julich, 3664, (1999)
Availability: Available from the Librarian, Institut fur Plasmaphysik EURATOM Association, Trilateral Euragio
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