Recycling of hydrogen from stainless steel surfaces under ITER/NET conditions

Hydrogen recycling measurements from AISI 316L austenitic steel surfaces have been performed in an installation using a multipole ion source as plasma simulator. The target temperature ranges from 300 to 600°C, the ion flux density from 2 to 6 mA/cm 2 or 2.5 × 10 16 to 7.5 × 10 16 atomic particles/(...

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Bibliographic Details
Published in:Journal of nuclear materials 1991-03, Vol.179, p.316-318
Main Authors: Reiter, F., Camposilvan, J., Caorlin, M., Perujo, A., Tominetti, S.
Format: Article
Language:English
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Summary:Hydrogen recycling measurements from AISI 316L austenitic steel surfaces have been performed in an installation using a multipole ion source as plasma simulator. The target temperature ranges from 300 to 600°C, the ion flux density from 2 to 6 mA/cm 2 or 2.5 × 10 16 to 7.5 × 10 16 atomic particles/(cm 2 s) and the ion energy from 100 to 200 eV. Characteristic recycling times, after which 63% of the implanted hydrogen is released, are in the order of 1 s and increase slightly with increasing temperature. This temperature dependence indicates that the rate-controlling step of hydrogen release from stainless steel surfaces under these conditions is the recombination of hydrogen at the surface.
ISSN:0022-3115
1873-4820
DOI:10.1016/0022-3115(91)90089-P