High Power Laser and Particle Beams, Volume. 33, Issue 9, 092002(2021)

White light spectroscopy technology for measuring the uniformity of capsule shell thickness

Ting Fan1...2, Xiaojun Ma1,*, Zongwei Wang1, Qi Wang1, Zhibing He1 and Yong Yi2 |Show fewer author(s)
Author Affiliations
  • 1Laser Fusion Research Center, CAEP, Mianyang 621900, China
  • 2School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
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    To measure accurately the thickness and its distribution of capsule, the white light reflection spectrum measurement technology is studied. The basic principle of white light reflection spectrum and the corresponding data processing methods, such as the extreme value method, the peak fitting method and the interference order correction method, are analyzed. Based on the white light reflection spectrum and the precision rotary axis system, the measuring apparatus applied to determine the shell thickness and its distribution of the capsule is developed. The white light reflectance spectrum measurement, data processing and reliability verification experiments of GDP capsule are carried out and the circular thickness distribution curve of capsule is obtained. The research results show that the thickness and its distribution of capsule can be measured accurately by white light reflectance spectrum technology based on spectral peak fitting method and interference order correction method and the measurement error is less than 0.1 μm.

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    Ting Fan, Xiaojun Ma, Zongwei Wang, Qi Wang, Zhibing He, Yong Yi. White light spectroscopy technology for measuring the uniformity of capsule shell thickness[J]. High Power Laser and Particle Beams, 2021, 33(9): 092002

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    Paper Information

    Category: Inertial Confinement Fusion Physics and Technology

    Received: May. 12, 2021

    Accepted: --

    Published Online: Oct. 9, 2021

    The Author Email: Ma Xiaojun (maxj802@163.com)

    DOI:10.11884/HPLPB202133.210179

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