Collection efficiency for carbon and deuterium of different surfaces when exposed to the scrape-off plasma in tokamaks
Carbon and deuterium have been collected on surface probes inserted in the limiter shadow of TEXTOR, with carbonised conditions, i.e. with carbonised graphite limiters and carbonised liner. The exposure time ranges from 0.1s to 150s, and a number of different collector materials have been used: Be, graphite, stainless steel, Al, Si, Ti and Au. The collection efficiency of these different surfaces for carbon and deuterium is compared. An experiment with secondary collectors has also been performed in the scrape-off plasma at TEXTOR, in order to estimate the combined effect of backscattering and erosion at the collector surface due to physical sputtering.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 162-164 (1989) pp. 593-597
Record Number: 199010370 / Last updated on: 1994-12-01
Original language: en
Available languages: en