| Autor: |
B.C. Stratton, E.J. Synakowski, P.C. Efthimion, K.W. Hill, R.A. Hulse, D.W. Johnson, H. Park, G. Taylor, J. Timberlake, R.J. Fonck |
| Rok vydání: |
1990 |
| Předmět: |
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| Popis: |
Transport of iron in TFTR discharges is studied by spatially-resolved charge exchange recombination spectroscopy in the visible region of the spectrum. Time evolutions of the densities of Fe{sup 24+} and Fe{sup 23+} ions following injection of iron are modeled by the neoclassical flux plus a moderately hollow diffusivity increasing linearly from 1.3 m{sup 2}/sec on axis to 2.4 m{sup 2}/sec at the plasma edge. For r/a{gt}0.5. the iron diffusivity is significantly smaller than the helium diffusivity measured in identical discharges, while it is larger in the region immediately surrounding the plasma axis. 15 refs., 3 figs. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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