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Graphite collector probes were used at TEXTOR for detailed studies of ionic fluxes in the scrape-off layer (SOL) during the first silicon-assisted operation of a tokamak. The probe exposures were made in order to recognise the evolution of silicon fluxes and the influence of silicon on the behaviour of other impurity atoms such as boron, oxygen and metals. Comparative exposures were made during plasma pulses performed under the following conditions: before the introduction of Si into the machine, with silane (SiH(4)) puffing into the SOL, fully fuelled with SiH(4) and immediately after the first or second siliconisation as well as a long time (260 discharges) afterwards.

Additional information

Authors: RUBEL M, Manne Siegbahn Institute of Physics, Stockholm (SE);EMMOTH B, Manne Siegbahn Institute of Physics, Stockholm (SE);WEINHOLD P ET AL., Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: Proceedings of the 20th European Conference on Controlled Fusion and Plasma Physics, Vol. III (1993) pp. 1127-1130
Record Number: 199311145 / Last updated on: 1994-11-29
Original language: en
Available languages: en
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