Dr. Jianli Guo Profile

Dr. Jianli Guo

at Univ of Tokyo

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Proceedings Article | 27 September 2019 Paper

Development of organic abrasive machining system for fabricating soft x-ray ellipsoidal mirrors

Y. Matsuzawa, S. Yokomae, J. Guo, K. Hiraguri, H. Hashizume, H. Mimura

Proceedings Volume 11108, 1110803 (2019) https://doi.org/10.1117/12.2529008

KEYWORDS: Mirrors, Abrasives, Surface finishing, X-rays, Polishing, Particles, X-ray optics, Nickel, X-ray technology

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Ellipsoidal mirrors are promising focusing devices for soft x-rays. Ellipsoidal mirrors were fabricated by our group using nickel electroforming, for which a precise master mandrel is required because the surface accuracy of the reflective surface is limited by the mandrel. The aim of this study was to develop a processing method for correcting the surface figure error of the mandrel with high spatial resolution. This method is based on loose abrasive machining with organic abrasive slurry and a small rotating tool. We call this method “Organic Abrasive Machining” (OAM). The organic particle materials are acrylic resin or urethane resin, which have excellent characteristics that include such as high dispersion, low hardness, and high washability. In the presentation, we will report the basic performance of the newly developed OAM system, including such as a stationary spot profile, surface roughness, and long-term stability of the removal rate during figure corrections. Spatial wavelength of 100 m on a rod lens was achieved, which means that the OAM could be applied for deterministic figure correction of the surface waviness of ellipsoidal mirrors.

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