3-D surface morphology measurement of plasma-facing materials using laser speckle interferometry in presence of periodic vibration

Yuanbo Li; Shuhua Li; Xiaoqian Cui; Dongye Zhao; Hongbin Ding

doi:10.1117/12.2541960

18 December 2019 3-D surface morphology measurement of plasma-facing materials using laser speckle interferometry in presence of periodic vibration

Yuanbo Li, Shuhua Li, Xiaoqian Cui, Dongye Zhao, Hongbin Ding

Author Affiliations +

Proceedings Volume 11337, AOPC 2019: Optical Spectroscopy and Imaging; 113370A (2019) https://doi.org/10.1117/12.2541960
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

Aiming at building the real-time measuring system of surface morphology of Plasma-Facing Components (PFCs) in fusion devices, an optical approach based on Laser Speckle Interferometry (LSI) is in development in our laboratory. To preserve high temporal resolution, the temporal phase shifting approach was introduced. However, this approach is sensitive to vibrations, which decreases the accuracy of morphology measurement. Considering the periodic vibration of the tokamak device itself, it is important to study the influence of the periodic vibration on online surface morphology measurement of PFCs. In this paper, we specify the effects of amplitude and frequency of periodic vibration on surface morphology measurements based on LSI measurement system. Benchmark tests are performed on the Molybdenum (Mo) material, which is commonly used as PFCs in Experimental Advanced Superconducting Tokamak (EAST).

Citation Download Citation

Yuanbo Li, Shuhua Li, Xiaoqian Cui, Dongye Zhao, and Hongbin Ding "3-D surface morphology measurement of plasma-facing materials using laser speckle interferometry in presence of periodic vibration", Proc. SPIE 11337, AOPC 2019: Optical Spectroscopy and Imaging, 113370A (18 December 2019); https://doi.org/10.1117/12.2541960

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