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Abstract

Two techniques are described for the measurement of erosion/redeposition in the new JET divertor. The first of these, colour fringe analysis (CFA), in which the target is viewed with a colour camera, can be used in the study of optically transparent deposited films of up to 1 micron thick. The second, speckle interferometry, is a powerful technique for following changes in surface topology, but its sensitivity of more than 1 micron makes it more suitable for the next generation of tokamaks. The development of both these techniques is described and their feasibility is discussed.

Additional information

Authors: COAD J P, JET Joint Undertaking, Abingdon, Oxon. (GB);DE KOCK L, JET Joint Undertaking, Abingdon, Oxon. (GB);BEHRISCH R, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);KOCH A, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);WILHELM R, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);WESCHENFELDER F, Forschungszentrum Jülich GmbH (KFA) (DE);WIENHOLD P, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 200 (1993) pp. 360-365
Record Number: 199310997 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en