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Digital holography for erosion monitoring inside the ITER Tokamak
Author(s): G. Pedrini; I. Alekseenko; G. Jagannathan; M. Kempenaars; G. Vayakis; W. Osten
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Paper Abstract

In the International Thermonuclear Experimental Reactor (ITER) Project, under construction in southern France, there will be a need for continually measuring the erosion at the wall, after the machine starts operating. A multiple wavelength interferometric technique based on digital holography is proposed for the erosion measurement. This technique has the ability to tackle the challenging environmental conditions within the reactor by a long distance measurement, where a relay optic will be used for imaging the investigated surface on the detector. We will show that shape measurements of objects located at a distance of more than 13 m from the measuring head can be carried out by the multiple wavelength interferometric technique. A depth accuracy of ±10 μm is achieved.

Paper Details

Date Published: 24 May 2018
PDF: 6 pages
Proc. SPIE 10677, Unconventional Optical Imaging, 1067722 (24 May 2018); doi: 10.1117/12.2307333
Show Author Affiliations
G. Pedrini, Institut für Technische Optik (Germany)
I. Alekseenko, Institut für Technische Optik (Germany)
G. Jagannathan, ITER Organization (France)
M. Kempenaars, ITER Organization (France)
G. Vayakis, ITER Organization (France)
W. Osten, Institut für Technische Optik (Germany)


Published in SPIE Proceedings Vol. 10677:
Unconventional Optical Imaging
Corinne Fournier; Marc P. Georges; Gabriel Popescu, Editor(s)

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