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The difficulty of transporting energy out of a magnetically confined plasma could be partially solved through the use of impurity radiation to induce cooling at the plasma edge. The feasibility of this technique depends on the performance of the impurities employed in meeting various limiting conditions. Building on the results of earlier experiments on radiation cooling with neon in the TEXTOR tokamak, further experiments with neon and silicon were conducted. The results of these were compared with those from mathematical modelling, in order to determine the effect of these two impurities on plasma-wall interaction, their radiation and transport characteristics and their suitability for radiation cooling. By injecting neon and silicon, much of the heating power of the plasma under quasi-stationary conditions can be transported away by radiation, whilst maintaining only moderate impurity concentration in the plasma core.

Additional information

Authors: UNTERBERG B, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Report: Jül-3036 DE (1995) 121 pp.
Availability: Available from Zentralbibliothek der Forschungszentrum Jülich GmbH, Postfach 1913, 5170 Jülich (DE)
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