Borodin, D

Kirschner, A

Litnovsky, A

Matveev, Dmitry

Philipps, V

Van Oost, Guido

English

Ghent University Academic Bibliography

Modelling of material deposition in gaps of castellated sur-faces in fusion experiments — •D. Matveev1,2, A. Kirschner1,D. Borodin1, A. Litnovsky1, V. Philipps1, G. Van Oost2 —1Institut fu¨r Energieforschung - Plasmaphysik, ForschungszentrumJu¨lich GmbH, Association EURATOM-FZJ, Trilateral Euregio Clus-ter, Ju¨lich — 2Department of Applied Physics, Ghent UniversityTritium co-deposition and retention are critical issues for ITER. Ex-periments show that fuel-rich carbon layers are formed on plasma shad-owed areas and especially in narrow gaps between tiles of castellatedsurfaces. Most of proposed T-removal techniques are not able to ac-cess these gap areas. Therefore, understanding of physical phenomenaunderlying impurity deposition inside gaps is of crucial importance.Experiments with ITER-like castellated limiters performed at TEX-TOR show not only side surfaces but also the gap bottom to accumu-late significant carbon deposits. 3D Monte-Carlo code (3DGAP) hasbeen developed as a part of modelling activities for these experiments.The code is based on simulation of neutral particle transport inside agap. Different sources of incoming particles, particle reflection fromside walls of the gap, elastic neutral collisions and chemical erosionof carbon layers can be studied. The role of these factors has beeninvestigated with respect to carbon deposition inside gaps. It has beenshown that modelled carbon deposition profiles agree with experimen-tal observations for side surfaces of the gap, while some discrepancieshave been found for the gap bottom. A detailed analysis of modellingresults will be presented in this contribution.Part: PType: Vortrag; TalkTopic: Plasma-Wand-Wechselwirkung; Plasma-WallInteractionEmail: d.matveev@fz-juelich.de

Modelling of material deposition in gaps of castellated surfaces in fusion experiments

https://biblio.ugent.be/publication/1242902/file/1242935.pdf

Modelling of material deposition in gaps of castellated surfaces in fusion experiments

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Ghent University Academic Bibliography