Diagnosis of the periodic vibration using laser interferometry

Qiang Wang; Yuanbo Li; Xiaoqian Cui; Hongbin Ding

doi:10.1117/12.2647970

23 January 2023 Diagnosis of the periodic vibration using laser interferometry

Qiang Wang, Yuanbo Li, Xiaoqian Cui, Hongbin Ding

Author Affiliations +

Proceedings Volume 12557, AOPC 2022: Optical Sensing, Imaging, and Display Technology; 125570N (2023) https://doi.org/10.1117/12.2647970
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

Temporal phase-shifting interferometry (TPSI) has been proposed for morphology monitoring of Plasma-Facing materials (PFMs) in Tokamak due to its high precision and far-field online capability. However, this monitoring method is sensitive to vibrational environment and the mechanical vibration in Tokamak, such as the Experimental Advanced Superconducting Tokamak (EAST), would lead to a decrease in the accuracy of the measurement or even wrong results. Real-time detection of the vibration parameters of the Tokamak during the plasma operation to compensate for the error of the TPSI measurement is a solution to improve the accuracy. In this paper, a laser interferometry platform for diagnosing and measuring vibration amplitude and frequency adopting the fringe-counting (FC) method has been introduced. We measured the different vibration amplitudes and frequencies using the proposed approach. The results show that the method has a potential application for in-situ measurement of surface morphology of PFMs in Tokamak like EAST.

Citation Download Citation

Qiang Wang, Yuanbo Li, Xiaoqian Cui, and Hongbin Ding "Diagnosis of the periodic vibration using laser interferometry", Proc. SPIE 12557, AOPC 2022: Optical Sensing, Imaging, and Display Technology, 125570N (23 January 2023); https://doi.org/10.1117/12.2647970

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