Speckle interferometry application for erosion measurements in fusion devices

E. Gauthier; R. Roupillard

doi:10.1117/12.516650

Abstract

In order to measure erosion/redeposition in fusion devices, a new diagnostic based on speckle interferometry is investigated. First experiments performed on carbon fiber composite (CFC) materials have shown that this technique is able to measure a modification of the surface in the range of 1 μm. Further experiments have been performed on different materials using a second wavelength in order to carry out 3D measurements of the surface and to increase the dynamic range of the depth measurement. A diagnostic, based on two-wavelength TV-holography to measure in situ erosion/redeposition during long duration discharges on the CIEL limiter in Tore Supra, is under development at CEA Cadarache.

Citation Download Citation

E. Gauthier, E. Gauthier, R. Roupillard, R. Roupillard, } "Speckle interferometry application for erosion measurements in fusion devices", Proc. SPIE 4933, Speckle Metrology 2003, (27 May 2003); doi: 10.1117/12.516650; https://doi.org/10.1117/12.516650

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