Advanced fabrication technologies for ultraprecise replicated mirrors for x-ray telescopes

Author/Creator ORCID





Citation of Original Publication

Hidekazu Mimura, Gota Yamaguchi, Takehiro Kume, Yoko Takeo, Akinari Ito, Yusuke Matsuzawa, Takahiro Saito, Kentarou Hiraguri, Yusuke Takehara, Ayumu Takigawa, Keisuke Tamura, Tetsuo Kanoh, Kenji Tachibana, Hirokazu Hashizume, Ikuyuki Mitsuishi, "Advanced fabrication technologies for ultraprecise replicated mirrors for x-ray telescopes," Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114441G (13 December 2020); doi: 10.1117/12.2560892


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For many years, Wolter mirrors have been used as imaging elements in X-ray telescopes. The shape error of Wolter mirrors fabricated by replicating the shape of a mandrel originates from the replication error in electroforming. We have been developing an X-ray focusing mirror for synchrotron radiation X-rays, as well as a high-precision electroforming process. In this paper, we report on the application of the advanced electroforming process to the fabrication of Wolter mirrors for the FOXSI Sun observation project. We also discuss the figuring accuracy of the mandrel.