'Mixed-material evolution analysis of the ITER divertor'

J. N. Brooks; J. P. Allain

doi:10.1016/j.jnucmat.2009.01.138

'Mixed-material evolution analysis of the ITER divertor'

J. N. Brooks, J. P. Allain

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6 Scopus citations

Abstract

Evolution of the ITER outer divertor target surface is analyzed for the case of wall-sputtered beryllium transported to an initially tungsten divertor. Coupled codes for the convective edge plasma, impurity transport, and mixed-surface sputtering, give the wall-source beryllium flux to the divertor, the sputtering erosion/redeposition response, and the resulting beryllium surface content/growth. The analysis shows zero net Be growth over most (∼80%) of the divertor, due to high re-sputtering and reflection-with an equilibrium Be/W surface quickly formed (∼10 s)-but with a region near the strike point having substantial (∼1 nm/s) growth.

Original language	English (US)
Pages (from-to)	123-126
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	390-391
Issue number	1
DOIs	https://doi.org/10.1016/j.jnucmat.2009.01.138
State	Published - Jun 15 2009

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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10.1016/j.jnucmat.2009.01.138

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title = "'Mixed-material evolution analysis of the ITER divertor'",

abstract = "Evolution of the ITER outer divertor target surface is analyzed for the case of wall-sputtered beryllium transported to an initially tungsten divertor. Coupled codes for the convective edge plasma, impurity transport, and mixed-surface sputtering, give the wall-source beryllium flux to the divertor, the sputtering erosion/redeposition response, and the resulting beryllium surface content/growth. The analysis shows zero net Be growth over most (∼80%) of the divertor, due to high re-sputtering and reflection-with an equilibrium Be/W surface quickly formed (∼10 s)-but with a region near the strike point having substantial (∼1 nm/s) growth.",

author = "Brooks, {J. N.} and Allain, {J. P.}",

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AU - Allain, J. P.

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N2 - Evolution of the ITER outer divertor target surface is analyzed for the case of wall-sputtered beryllium transported to an initially tungsten divertor. Coupled codes for the convective edge plasma, impurity transport, and mixed-surface sputtering, give the wall-source beryllium flux to the divertor, the sputtering erosion/redeposition response, and the resulting beryllium surface content/growth. The analysis shows zero net Be growth over most (∼80%) of the divertor, due to high re-sputtering and reflection-with an equilibrium Be/W surface quickly formed (∼10 s)-but with a region near the strike point having substantial (∼1 nm/s) growth.

AB - Evolution of the ITER outer divertor target surface is analyzed for the case of wall-sputtered beryllium transported to an initially tungsten divertor. Coupled codes for the convective edge plasma, impurity transport, and mixed-surface sputtering, give the wall-source beryllium flux to the divertor, the sputtering erosion/redeposition response, and the resulting beryllium surface content/growth. The analysis shows zero net Be growth over most (∼80%) of the divertor, due to high re-sputtering and reflection-with an equilibrium Be/W surface quickly formed (∼10 s)-but with a region near the strike point having substantial (∼1 nm/s) growth.

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'Mixed-material evolution analysis of the ITER divertor'

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