Re-deposition of ITER-grade Be on plasma gun facility QSPA-Be: Characterization & plasma cleaning

A.M. Dmitriev, A.G. Razdobarin,L.A. Snigirev, D.I. Elets, I.M. Bukreev, N.A. Babinov, L.A. Varshavchik, E.E. Mukhin,D.S. Samsonov,S. Yu. Tolstyakov,An.P. Chernakov,D.V. Kovalenko, V.L. Pogkovyrov, A.D. Yaroshevskaya, V.A. Barsuk, I.B. Kupriyanov, V.L. Bukhovets, A.E. Gorodetsky, A.V. Markin,R.Kh. Zalavutdinov

Nuclear Materials and Energy（2022）

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Abstract

•· The paper presents studies of deposits produced by QSPA-Be machine. · Characterization of the deposits revealed PC-BeO stricture of the films. · The deposits were found to be similar to those obtained in JET-ILW outer divertor.· The one pulse of QSPA-Be provided deposition of ∼7 nm contaminant layer. · Test plasma cleaning of DTS protective window mock-ups is discussed.

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Key words

First mirrors,Protective windows,Beryllium,Surface analysis,Plasma cleaning,RF discharge

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