Emission of deuterium from SS 316L after plasma bombardment

The understanding of the recycling (particle re-emission) behaviour of hydrogen isotopes from the first wall structures to the plasma of a fusion reactor is a crucial issue in plasma-wall interaction research, because the plasma performance will strongly depend on the time-scale and magnitude of thi...

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Published in:Journal of nuclear materials 1995-04, Vol.220 (1-3), p.762-766
Main Authors: Tominetti, S., Perujo, A., Camposilvan, J., Alberici, S.
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Language:English
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Perujo, A.
Camposilvan, J.
Alberici, S.
description The understanding of the recycling (particle re-emission) behaviour of hydrogen isotopes from the first wall structures to the plasma of a fusion reactor is a crucial issue in plasma-wall interaction research, because the plasma performance will strongly depend on the time-scale and magnitude of this phenomenon. Deuterium recycling measurements from AISI 316L austenitic stainless steel surfaces have been performed in an experimental facility capable of reproducing particle flux densities and ion energies similar to those of ITER. The recycling flux has been evaluated. It is strongly dependent upon the impinging particle flux while target temperature and particle energy do not play a significant role. From these measurements a recombination coefficient for the system deuterium-AISI 316L has been calculated. The values are quite low, hence indicating that the AISI 316L sample target used was covered by an oxide layer that inhibits recombination. Moreover, the chemical composition of the recycling flux is pure molecular deuterium.
doi_str_mv 10.1016/0022-3115(94)00581-8
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title Emission of deuterium from SS 316L after plasma bombardment
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