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This report contains two papers. The first concerns deuterium and metal impurities on long-term targets on the FT limiter. A poloidally and radially asymmetric pattern of both the amount and the shape of the metal coverage and the deuterium content is found from the PIXE and NRA surface analyses. The second paper concerns the erosion and redeposition behaviour of selected NET-candidate materials under high flux hydrogen, deuterium plasma bombardment in PISCES. The erosion yield of SiC-impregnated graphite is found to be a factor of 2 to 3 less than that of isotropic graphite materials. A further similar reduction is observed when redeposition associated with reionisation of sputtered particles becomes significant. Significant surface morphological modifications of SiC-impregnated graphite are observed after high-fluence plasma exposure, although the final surface composition appears to remain unchanged up to 4 x 1.0E22 ions/cm-2.

Additional information

Authors: ENEA, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Report: RT/FUS/88/21 EN (1988)
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65 - 00044 Frascati, Roma (IT)
Record Number: 199010502 / Last updated on: 1994-12-01
Original language: en
Available languages: en