Surface error modeling, evaluation and optimization of large optics in inertial confinement fusion laser system
| Autor: | Liu Changchun, Xiong Zhao, Yuan Xiao-Dong, Tian Menjiya, Wang Hui, Quan Xusong, Zhang Zheng, Liu Tianye |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Surface (mathematics)
Wavefront Computer science business.industry Mechanical Engineering Process (computing) 02 engineering and technology Decoupling (cosmology) 021001 nanoscience & nanotechnology Laser 01 natural sciences Finite element method law.invention 010309 optics Interferometry Optics Nuclear Energy and Engineering law 0103 physical sciences General Materials Science 0210 nano-technology business Inertial confinement fusion Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 137:61-70 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2018.08.005 |
| Popis: | Surface errors of mounted large optics have significant impacts on laser performance in high power laser system. However, in SG-III inertial confinement fusion (ICF) laser system, it is really tough to realize the minimized surface error and satisfy the design criterions. In this paper, the compositions and corresponding causes of complicated surface topographies are analyzed systematically. Surface decoupling, reconstruction and fitting methods are proposed successively and constitute an integrated surface modeling methodology to visualize and evaluate both offline and online mirror surfaces. Further, we present a closed-loop “mounting – inspection – optimization” assembly process based on the combination of interferometric measuring, finite element simulation and digital reconstruction, which will lead the mounting induced surface error of the large optics to meet the wavefront criterions. Through a case study of the large aperture laser transport mirror, the proposed approach is proved to have good performance on both improving optical mounting performance and obtaining accurate surface features. |
| Databáze: | OpenAIRE |
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