Development of thin foil substrates for an X-ray telescope: II.

Hisamitsu Awaki; Kazunori Heike; Youichi Misao; Yuzuru Tawara; Yasushi Ogasaka; Hideyo Kunieda; Hitoshi Ohmori; Weimin Lin; Sei Moriyasu; Yoshiyuki Ueno; Shin-ya Morita; Kazutoshi Katahira; Changling Liu; Hiromichi Honda; Susumu Shioya

doi:10.1117/12.461142

11 March 2003 Development of thin foil substrates for an x-ray telescope: II

Hisamitsu Awaki, Kazunori Heike, Youichi Misao, Yuzuru Tawara, Yasushi Ogasaka, Hideyo Kunieda, Hitoshi Ohmori, Weimin Lin, Sei Moriyasu, Yoshiyuki Ueno, Shin-ya Morita, Kazutoshi Katahira, Changling Liu, Hiromichi Honda, Susumu Shioya

Author Affiliations +

Proceedings Volume 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy; (2003) https://doi.org/10.1117/12.461142
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

We propose a method to make advanced thin-foil substrates for an X-ray telescope by press forming. Walter Type-I optics, which reflect X-rays twice with their confocal paraboloidal and hyperboloidal reflectors, have commonly been used in X-ray astronomy. However, it is difficult to make substrates for a large X-ray telescope with a high imaging quality. By forming two reflectors from one thin substrate, the accuracy of the angle between two reflectors is determined by the accuracy of a mandrel or a stamping die. We made a stamping die using a precision processing method at RIKEN. After several improvements of our pressing method, we have obtained the substrates with a figure error < 15 um, which corresponds to an angular resolution of about 2' at the focal plane, although a small waviness was found in the mirror surface. We also propose a new holding method of the foil to reduce a displacement of the foil positions. The foil is tightly held with three thin-supports with a thickness of 0.3 mm. We made the test model of a mirror housing, and found that the foil position was determined with σ~12μm.

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Hisamitsu Awaki, Kazunori Heike, Youichi Misao, Yuzuru Tawara, Yasushi Ogasaka, Hideyo Kunieda, Hitoshi Ohmori, Weimin Lin, Sei Moriyasu, Yoshiyuki Ueno, Shin-ya Morita, Kazutoshi Katahira, Changling Liu, Hiromichi Honda, and Susumu Shioya "Development of thin foil substrates for an x-ray telescope: II", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); https://doi.org/10.1117/12.461142

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