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- W1993411232 abstract "The surfaces of two Be limiters and of a test sample from the stainless steel torus wall used in UNITOR have been analyzed by RBS, PIXE, AES, and SEM/EIXE. The main foreign atoms found on the limiters are O (2 × 1017 to 2 × 1018/cm2), Fe, Ni Cr, and Sn (2 × 1015 to 2 × 1016/cm2). There are no large differences of the foreign atom coverage on the different surface areas of the limiters. Generally the front surface of the limiters shows a slightly lower coverage than the sides. On limiter 2, the Sn coverage is about a factor of 4 larger than on limiter 1, indicating that the Sn source was close to this limiter. The stainless steel test sample from the torus wall shows islands of BeO, which can be attributed to splashes or droplets eroded from the limiters during disruptions. Major erosion of the limiters occurred only during the first 100 shots, when many discharges were terminated by disruptions. Redeposited wall material is found on the wall sample which partially covers the BeO deposits. The surface modifications of limiters and wall samples were discussed by taking into account the particle fluxes from and to the walls and limiters." @default.
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- W1993411232 date "1987-02-01" @default.
- W1993411232 modified "2023-09-26" @default.
- W1993411232 title "Surface composition of the Be limiters and the stainless steel torus wall after operation in UNITOR" @default.
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- W1993411232 doi "https://doi.org/10.1016/0022-3115(87)90440-5" @default.
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