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首页> 外文期刊>Optical engineering >Surface topography measurement of plasma-facing materials by dual-wavelength phase-shifting speckle interferometry technique
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Surface topography measurement of plasma-facing materials by dual-wavelength phase-shifting speckle interferometry technique

机译:用双波长相移斑点干涉法测量等离子体材料的表面形貌

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摘要

A dual-wavelength phase-shifting speckle interferometry approach has been proposed to diagnose the topography of plasma-facing materials (PFMs) in tokamak. The conventional speckle interferometric surface measurement, which uses single-wavelength, can offer excellent vertical resolution, but limitation in measuring large height step and phase ambiguity would occur during their application. To solve the problem, a dual-wavelength method was developed. Experiments were conducted on molybdenum (Mo) sample, which is related to PFMs of experimental advanced superconducting tokamak (EAST), and a laser ablation method was adopted to simulate the erosion happed on PFMs. The laser ablation craters were measured by both single-wavelength and dual-wavelength phase-shifting speckle interferometry, and a multistep phase-shifting method has been investigated for their effectiveness on reducing noise in calculating the phase map. This work demonstrates the superiority of the dual-wavelength speckle interferometry and the feasibility of applying the measurement system in topographic measurement of PFMS in EAST.
机译:已经提出了一种双波长相移斑点干涉法来诊断托卡马克中的等离子体材料(PFM)的形貌。使用单波长的常规散斑干涉表面测量可以提供出色的垂直分辨率,但是在应用过程中会出现测量大高度阶跃和相位模糊的限制。为了解决该问题,开发了一种双波长方法。对与实验先进超导托卡马克(EAST)的PFM有关的钼(Mo)样品进行了实验,并采用激光烧蚀方法模拟了对PFM的腐蚀。通过单波长和双波长相移斑点干涉法测量了激光烧蚀坑,并研究了一种多步相移方法在减少相位图计算中对降低噪声的有效性。这项工作证明了双波长散斑干涉测量法的优越性,以及将该测量系统应用于EAST PFMS形貌测量的可行性。

著录项

  • 来源
    《Optical engineering》 |2018年第1期|014109.1-014109.9|共9页
  • 作者单位

    Dalian University of Technology, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Chinese Ministry of Education, School of Physics, Dalian, China;

    Dalian University of Technology, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Chinese Ministry of Education, School of Physics, Dalian, China;

    Dalian University of Technology, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Chinese Ministry of Education, School of Physics, Dalian, China;

    Dalian University of Technology, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Chinese Ministry of Education, School of Physics, Dalian, China;

    Dalian University of Technology, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Chinese Ministry of Education, School of Physics, Dalian, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    speckle interferometry; dual-wavelength; topography measurement; multistep phase-shifting; tokamak;

    机译:斑点干涉法双波长地形测量;多步相移托卡马克;

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