Erosion and Redeposition Measurement in Tokamaks using Temporal Phase Shifting Speckle Interferometry in Presence of Vibrations

摘要

For erosion/redeposition measurement in tokamaks, an optical method based on digital speckle pattern interferometry is in development at CEA Cadarache. In order to preserve high spatial resolution, the temporal phase shifting method is used. However, this technique is sensitive to vibrations, which decreases the phase map quality. In this paper, we propose two techniques of phase calculation in presence of vibrations.