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One of the main difficulties on the way towards achieving controlled nuclear fusion is that of dissipating the energy in a fusion plasma. Extraordinary power densities occur which cannot be tolerated in stationary operation. One way of tackling this problem is the so-called cold radiation belt. Impurities are deliberately injected so as to transport the energy of the plasma through line radiation onto the entire plasma container wall. Although this idea is not new, it is only very recently, in experiments at the TEXTOR tokamak reactor, that the creation of cold radiation belts has been possible.

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Authors: SAMM U, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: Physikalische Blätter, Vol. 50 (1994) No. 5, pp. 462-465
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