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Studies in TEXTOR have shown that the material collected on targets in the scrape-off layer (SOL) is identical to the carbonisation layer. Recycling of this carbon back to the wall and limiters is desirable. A boronisation of the TEXTOR inner wall was performed in order to reduce further the impurity concentrations. All graphite limiters and the inconel lines were covered with an amorphous boron containing carbon layer (a-C/B:H) of 30-80 nanometres thickness, which was expected to reduce chemical erosion by a factor of 10. The Stockholm TEXTOR probe system has collected particles in the SOL in time resolved and integrated exposures, some 200 discharges after the boronisation. Changes of the structure of the deposit and the C and O fluxes to the collector are studied and compared to previous results. The B deposition is also observed.

Additional information

Authors: WIENHOLD P, Institut für Plasmaphysik, KFA Jülich GmbH (DE);ESSER H G, Institut für Plasmaphysik, KFA Jülich GmbH (DE);WINTER J, Institut für Plasmaphysik, KFA Jülich GmbH (DE);EMMOTH B, Research Institute of Physics, Stockholm (SE);BERGSAKER H, Research Institute of Physics, Stockholm (SE);VON SEGGERN J, IGV, KFA Jülich GmbH (DE)
Bibliographic Reference: Paper presented: 16th European Conference on Controlled Fusion and Plasma Physics, Venezia (IT), March 13-17 1989
Availability: Available from (1) as Paper EN 34782 ORA
Record Number: 198910633 / Last updated on: 1994-12-01
Original language: en
Available languages: en