Title of article
The scavenger effect – Does it work?
Author/Authors
Bohmeyer، نويسنده , , W. and Tabares، نويسنده , , F.L. and Baudach، نويسنده , , M. and Cwiklinski، نويسنده , , A. and Markin، نويسنده , , A. and Schwarz-Selinger، نويسنده , , T. and Ferreira، نويسنده , , J.A. and Fussmann، نويسنده , , G. and Loarte، نويسنده , , A.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2009
Pages
4
From page
560
To page
563
Abstract
The influence of nitrogen injection on the formation of a-C:H films in areas far away from the plasma as well as close to the plasma boundary was studied in the PSI-2 device for collector temperatures between 310 and 350 K. The balance between deposition and erosion determines the net growth rate. Small amounts of nitrogen (Φ(N2) ≈ Φ(CH4) ≈ 2% Φ(H2)) strongly reduce the net growth rate in H2/CH4 mixtures. While N2 injection does not influence erosion far away from the plasma it increases erosion close to the plasma boundary. The experiments show clear evidence for a scavenger effect due to the injected nitrogen. The conversion from N2 to active species takes place in the hot plasma region.
Journal title
Journal of Nuclear Materials
Serial Year
2009
Journal title
Journal of Nuclear Materials
Record number
1365907
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