Abstract
Nuclear activation techniques for the study of transport of wall materials in tokamaks are described. The technique uses post-activation of samples of eroded material collected on the inside surface walls. Quantitative measurements of complex wall materials, such as the stainless steels, are achieved through activation/decay analysis, energy filtering, and appropriate cooldown of the irradiated material. In experiments done on the Argonne APEX tokamak, the erosion of manganese from a manganin wire placed a short distance into the plasma edge was measured and found to be quite anisotropic. The results were sensitive to a fraction of a monolayer deposited on a 1 cm 2 sample. The technique is adaptable to studies of tokamak wall material transport and should find applications in other fields as well.
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More From: Nuclear Instruments and Methods In Physics Research
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