Cleanliness control of vacuum system in high-flux laser device

Wu Wenlong; Lin Donghui; Niu Longfei; Xiong Qian; Wang Zhenguo; Liu Jianguo; Chen Wenqi; Wu Yue; Liu Yong; Wang Lin; Yao Ke; Chen Lin

doi:10.11884/HPLPB202537.240266

Volume 37 Issue 1

Dec. 2025

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Wu Wenlong, Lin Donghui, Niu Longfei, et al. Cleanliness control of vacuum system in high-flux laser device[J]. High Power Laser and Particle Beams, 2025, 37: 012002. doi: 10.11884/HPLPB202537.240266

Citation:

Wu Wenlong, Lin Donghui, Niu Longfei, et al. Cleanliness control of vacuum system in high-flux laser device[J]. High Power Laser and Particle Beams, 2025, 37: 012002. doi: 10.11884/HPLPB202537.240266

Wu Wenlong, Lin Donghui, Niu Longfei, et al. Cleanliness control of vacuum system in high-flux laser device[J]. High Power Laser and Particle Beams, 2025, 37: 012002. doi: 10.11884/HPLPB202537.240266

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Cleanliness control of vacuum system in high-flux laser device

doi: 10.11884/HPLPB202537.240266

Laser Fusion Research Center, CAEP, Mianyang 621900, China

Received Date: 2024-08-16
Accepted Date: 2024-12-05
Rev Recd Date: 2024-12-05

Available Online: 2024-12-18

Publish Date: 2025-12-13

Abstract

Abstract

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.
- high-flux laser device,
- vacuum system,
- cleanliness,
- optical components,
- transmittance,
- damage density

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References(20)

References

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