Development of lightweight substrates made of magnesium

Hisamitsu Awaki; Kazunori Heike; Hiromichi Honda; Susumu Shioya

doi:10.1117/12.613829

7 October 2005 Development of lightweight substrates made of magnesium

Hisamitsu Awaki, Kazunori Heike, Hiromichi Honda, Susumu Shioya

Proceedings Volume 5900, Optics for EUV, X-Ray, and Gamma-Ray Astronomy II; 59001E (2005) https://doi.org/10.1117/12.613829
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We are studying on a press forming of a 0.3-mm-thick foil in order to make advanced thin-foil substrates with a two-stage reflector for large X-ray telescopes. Aluminum alloy has been used as a material for thin-foil substrates. We propose a use of Mg foil as lightweight substrates, since more lightweight material is necessary for building the large telescopes. Furthermore, we are making a two-stage reflector with a stage 200 mm long, since a long substrate has an advantage for fabrication of large X-ray telescopes. After various experiments, we formed a Mg foil with a figure error of +/-20 μm. This large figure error can be removed by a replication method. We also made an evaluation system of an image quality by using a Newtonian telescope. The evaluation system can generate a collimated optical light with a diameter of 450 mm and with a parallelism of about 4". Using this system, we found that an image quality of our Mg foil was similar to that of the ASCA foils.

Citation Download Citation

Hisamitsu Awaki, Kazunori Heike, Hiromichi Honda, and Susumu Shioya "Development of lightweight substrates made of magnesium", Proc. SPIE 5900, Optics for EUV, X-Ray, and Gamma-Ray Astronomy II, 59001E (7 October 2005); https://doi.org/10.1117/12.613829

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