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The transport of carbon and oxygen impurities was studied in TEXTOR by introducing the gases CH(4) and CO through a small hole in a test limiter. The toroidal distributions of different charge states of the impurities were measured using a CCD camera with optical filters. Local impurity ion temperatures were calculated from the Doppler broadening of line emission measured with a high resolution spectrometer. The spatial distributions and the ion temperatures were modelled using the LIM Monte Carlo impurity code, with experimentally measured plasma profiles. Good agreement is obtained for both sets of measurements. The comparison shows the breakup energies of the atomic fragments to be much less than 1 eV. The fuelling efficiency of different gas species is discussed.

Additional information

Authors: SAMM U ET AL., Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE);MCCRACKEN G M ET AL., UKAEA, Culham Laboratory, Abingdon, Oxon. (GB);PITCHER C S, Plasma Physics Laboratory, Princeton (US);STANGEBY P C, University of Toronto, Institute for Aerospace Studies, Downsview, Ontario (CA);ELDER D, University of Toronto, Institute for Aerospace Studies, Downsview, Ontario (CA)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 176 & 177 (1990) pp. 191-196
Record Number: 199110641 / Last updated on: 1994-12-02
Original language: en
Available languages: en