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First mirror tests for ITER : influence of material choice on the erosion/deposition mechanisms affecting optical reflectivity

De Temmerman, G. and Pitts, R. A. and Voitsenya, V. S. and Marot, L. and Veres, G. and Maurer, M. and Oelhafen, P.. (2007) First mirror tests for ITER : influence of material choice on the erosion/deposition mechanisms affecting optical reflectivity. Journal of nuclear materials, Vol. 363. pp. 259-263.

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Official URL: http://edoc.unibas.ch/dok/A5838817

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Abstract

Almost all optical diagnostics systems on ITER will be based on in-vessel metallic first mirrors. The possible deterioration of their surface reflectivity as a result of erosion by charge-exchange neutrals and re-deposition of material eroded from the plasma-facing components represents a serious concern for the reliability of spectroscopic and laser signals. A concerted effort within the tokamak community has been initiated to characterize these effects and seek mitigation methods. To date, the different damaging effects (erosion and deposition) have always been considered independently, neglecting any role that may be played by the substrate. In this contribution, we attempt to assess the influence of substrate material using different approaches: laboratory simulation experiments, mirror exposures in the divertor region of the TCV tokamak and numerical simulations using the Monte-Carlo code TRIDYN. Our results have potentially important implications for the choice of ITER first mirror materials. (c) 2007 Elsevier B.V. All rights reserved.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Marot, Laurent
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0022-3115
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:14 Sep 2012 07:18
Deposited On:14 Sep 2012 06:45

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