| Autor: |
U. Samm, P. Bogen, H. Hartwig, A. Pospieszczyk, E. Hintz, Y.T. Lie, K. Höthker |
| Rok vydání: |
1984 |
| Předmět: |
|
| Zdroj: |
Journal of Nuclear Materials. :157-162 |
| ISSN: |
0022-3115 |
| Popis: |
First measurements on the TEXTOR boundary layer are reported. The hydrogen recycling in front of the four limiter segments has been studied by means of a CCD-camera, which proved to be a good instrument to center the discharge for symmetric plasma-limiter contact. The composition of the neutral fluxes from the limiter have been measured: oxygen fluxes are about a factor of ten higher than the metal fluxes; within the error limits the composition does not change with varying limiter radius. Electron densities in the scrape-off layer away from the limiter have been determined by injecting an Li-atom beam from a thermal source and by observing its emission as a function of radius. Similar measurements have been made in front of the limiter with sputtered Cr and O atoms. Both methods gave for the magnetic surface of the limiter radius n c ≈ 1 × 10 12 /cm 3 . Infrared observations of a test limiter with a CCD-camera and a PbSe-detector have been performed to record the thermal loads. About 10% of the input power flows to the limiter. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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