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Proceedings Paper

3-D surface morphology measurement of plasma-facing materials using laser speckle interferometry in presence of periodic vibration
Author(s): Yuanbo Li; Shuhua Li; Xiaoqian Cui; Dongye Zhao; Hongbin Ding
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Paper 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).

Paper Details

Date Published: 18 December 2019
PDF: 6 pages
Proc. SPIE 11337, AOPC 2019: Optical Spectroscopy and Imaging, 113370A (18 December 2019); doi: 10.1117/12.2541960
Show Author Affiliations
Yuanbo Li, Dalian Univ. of Technology (China)
Shuhua Li, Dalian Univ. of Technology (China)
Xiaoqian Cui, Dalian Univ. of Technology (China)
Dongye Zhao, Forschungszentrum Jülich GmbH (Germany)
Hongbin Ding, Dalian Univ. of Technology (China)

Published in SPIE Proceedings Vol. 11337:
AOPC 2019: Optical Spectroscopy and Imaging
Jin Yu; Zhe Wang; Vincenzo Palleschi; Mengxia Xie; Yuegang Fu, Editor(s)

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