The environment effect on operation of in-vessel mirrors for plasma diagnostics in fusion devices

V.S. Voitsenya (1) , Ch. Gil (2) , V.G. Konovalov (1) , A. Litnovsky (3) , M. Lipa (2) , M. Rubel (4) , A. Sagara (5) , A. Sakasai (6) , B. Schunke (2) , T. Sugie (6) , G. de Temmerman (7) , K.Yu Vukolov (8) , S.N. Zvonkov (8) , P. Wienhold (3)

1 Institute of Plasma Physics
2 CEA/DSM/DRFC - Association EURATOM-CEA
3 Institut für Plasmaphysik
4 KTH - KTH Royal Institute of Technology [Stockholm]
5 NIFS - National Institute for Fusion Science
6 Naka Fusion Research Establishment 801-1
7 Institut für Physik
8 NRC KI - National Research Center "Kurchatov Institute"

First mirrors will be the plasma facing components of optical diagnostic systems in ITER. Mirror surfaces will undergo modification caused by erosion and re-deposition processes [1,2]. As a consequence, the mirror performance may be changed and may deteriorate [3,4]. In the divertor region it may also be obscured by deposition [5-7]. The limited access to in-vessel components of ITER calls for testing the mirror materials in present day devices in order to gather information on the material damage and degradation of the mirror performance, i.e. reflectivity. A dedicated experimental programme, First Mirror Test (FMT), has been initiated at the JET tokamak within the framework Tritium Retention Studies (TRS).

Mots clés: Tokamak; Plasma; Mirror Materials; Environmental Effects

Domaines: Physique des plasmas [physics.plasm-ph]

V.S. Voitsenya, Ch. Gil, V.G. Konovalov, A. Litnovsky, M. Lipa, et al.. The environment effect on operation of in-vessel mirrors for plasma diagnostics in fusion devices. 2004. ⟨hal-00001975v1⟩