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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    During the operation of vacuum system in high-flux laser device, molecular contamination generated by the pump lubricating oil in the vacuum environment may diffuse and deposit on the surface of optical system components, induce damage under high-flux laser irradiation, and reduce the devices’ load capacity. Research has been conducted on the cleanliness control of vacuum systems, and a series of technical measures have been developed to control the vacuum system cleanliness, including optimizing the vacuum pump group, increasing low-temperature cold trap adsorption, and adding online heating regeneration technology for the cold trap. The experimental research results show that after 120 h of continuous operation, the average surface deposition of non-volatile residues in the vacuum system reaches a clean level of 2.86 × 10-9 g/cm2 after 24 h; The transmittance at 350 nm and the damage density curve below 12.3 J/cm2 flux of the fused quartz optical test piece assessment group and control group are basically consistent, proving the effectiveness of this method.

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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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