High Power Laser and Particle Beams, Volume. 37, Issue 1, 012002(2025)

Cleanliness control of vacuum system in high-flux laser device

Wenlong Wu, Donghui Lin, Longfei Niu, Qian Xiong, Zhenguo Wang, Jianguo Liu, Wenqi Chen, Yue Wu, Yong Liu, Lin Wang, Ke Yao, and Lin Chen*
Author Affiliations
  • Laser Fusion Research Center, CAEP, Mianyang 621900, China
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    Figures & Tables(10)
    Data on transmittance of optical components in original facility with vacuum pumping
    Data on damage density of optical components in original facility with vacuum pumping
    Schematic diagram of cold trap structure
    Temperature field distribution of cold trap
    Cold trap online heating regeneration process flowchart
    Structural schematic diagram of vacuum clean liness validation experimental system
    Comparison curve of transmittance changes in the ultraviolet range of optical test pieces
    Experimental results of damage density of optical test pieces in different groups
    • Table 1. Comparison of conditions between the assessment group and the control group

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      Table 1. Comparison of conditions between the assessment group and the control group

      optical component groupconditions
      control groupplaced vertically in a PTFE storage box in a class 100 laboratory, at atmospheric pressure, room temperature, and relative humidity of 60%
      static assessment groupplaced vertically in the pipeline of vacuum clean validation experimental system in a class 10000 laboratory, the vacuum unit and cold trap are not running, at atmospheric pressure, room temperature, and relative humidity of 60%
      dynamic assessment groupplaced vertically in the pipeline of vacuum clean validation experimental system in a class 10000 laboratory, the vacuum unit and cold trap are running,with a vacuum degree of 4.0 × 10−1 Pa and a working temperature of −100 ℃ for the cold trap
    • Table 2. Experimental results of surface deposition of non-volatile residues

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      Table 2. Experimental results of surface deposition of non-volatile residues

      optical component grouptotal surface deposition of non-volatile residues after 120 h/(g·cm−2average surface deposition of non-volatile residues over 24 h/(g·cm−2
      static assessment group2.20×10−94.40×10−10
      dynamic assessment group1.43×10−82.86×10−9
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    Wenlong Wu, Donghui Lin, Longfei Niu, Qian Xiong, Zhenguo Wang, Jianguo Liu, Wenqi Chen, Yue Wu, Yong Liu, Lin Wang, Ke Yao, Lin Chen. Cleanliness control of vacuum system in high-flux laser device[J]. High Power Laser and Particle Beams, 2025, 37(1): 012002

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    Paper Information

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    Received: Aug. 16, 2024

    Accepted: Dec. 5, 2024

    Published Online: Feb. 21, 2025

    The Author Email: Lin Chen (283440697@qq.com)

    DOI:10.11884/HPLPB202537.240266

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