Journal Article

PreJuSER-10333

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Exposure of tungsten nano-structure to TEXTOR edge plasma

Ueda, Y. ; Miyata, K. ; Tsukatani, K. ; Ohtsuka, Y. ; Brezinsek, S.FZJ* ; Coenen, J. W.FZJ* ; Kreter, A.FZJ* ; Litnovsky, A.FZJ* ; Philipps, V.FZJ* ; Schweer, B.FZJ* ; Sergienko, G.FZJ* ; Hirai, T. ; Taguchi, A. ; Torikai, Y. ; Sugiyama, K. ; Tanabe, T. ; Kajita, S. ; Ohno, N.

2011
Elsevier Science Amsterdam [u.a.]

This record in other databases:    

Please use a persistent id in citations: doi:10.1016/j.jnucmat.2010.08.019

Abstract: W nano-structures (fuzz), produced in the linear high plasma device, NAGDIS, were exposed to TEXTOR edge plasmas (ohmic He/D mixed plasma and pure D plasma) to study formation, erosion and C deposition on W fuzz in tokamak plasmas for the first time. Fuzz layers were either completely eroded or covered by C deposit. There was no clear indication of W fuzz growth under the present conditions. There was no significant difference of C deposition between 'thick' fuzz (500-600 nm in thickness) and 'thin' fuzz (300-400 nm) in the He/D plasma. On the W fuzz surface. C deposition was enhanced probably due to reduction of effective sputtering yield and effective reflection coefficient of carbon ions, similar to roughness effects. Formation and erosion of W fuzz in tokamak devices and role of impurities are discussed. (C) 2010 Elsevier B.V. All rights reserved.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Plasmaphysik (IEK-4)

Research Program(s):

1. Fusion (P13)

Appears in the scientific report 2011

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