Interactions of diamond surfaces with fusion relevant plasmas

G. De Temmerman, R. P. Doerner, P. John, S. Lisgo, A. Litnovsky, L. Marot, S. Porro, P. Petersson, M. Rubel, D. L. Rudakov, G. Van Rooij, J. Westerhout, J. I B Wilson

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19 Citations (Scopus)

Abstract

The outstanding thermal properties of diamond and its low reactivity towards hydrogen may make it an attractive plasma-facing material for fusion and calls for a proper evaluation of its behaviour under exposure to fusion-relevant plasma conditions. Micro and nanocrystalline diamond layers, deposited on Mo and Si substrates by hot filament chemical vapour deposition (CVD), have been exposed both in tokamaks and in linear plasma devices to measure the erosion rate of diamond and study the modification of the surface properties induced by particle bombardment. Experiments in Pilot-PSI and PISCES-B have shown that the sputtering yield of diamond (both physical and chemical) was a factor of 2 lower than that of graphite. Exposure to detached plasma conditions in the DIII-D tokamak have evidenced a strong resistance of diamond against erosion under those conditions. © 2009 The Royal Swedish Academy of Sciences.

Original languageEnglish
Article number14013
JournalPhysica Scripta T
Volume2009
Issue numberT138
DOIs
Publication statusPublished - 2009
Event12th International Workshop on Plasma-Facing Materials and Components for Fusion Applications - Julich, Germany
Duration: 11 May 200914 May 2009

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