Development of the next generation X-ray telescope using CFRP as a substrate
Development of the next generation X-ray telescope using CFRP as a substrate
复制标题
以CFRP为基材的下一代X射线望远镜的开发
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Naoki Ishida
中科院分区：
文献类型：
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作者：
Toshihiro Iwase;H. Matsumoto;H. Kunieda;T. Miyazawa;T. Hibino;H. Awaki;S. Sugita;Daichi Kurihara;Naoki Ishida
日本的“朱雀”号、“飞鸟”号以及“ASTRO - H”号等卫星上搭载的沃尔特 - I型薄箔嵌套式X射线望远镜，能够以较低的总重量实现较大的有效面积。然而，由于反射镜的基底是薄铝箔，难以保持反射镜的原始形状，这些望远镜的成像质量受到限制。为了提高成像质量，我们尝试使用刚度比铝更高的碳纤维增强塑料（CFRP）作为反射镜的基底。此外，沃尔特 - I型光学系统中的抛物面和双曲面可以很容易地用碳纤维增强塑料实现，而日本卫星上过去使用的望远镜的铝基底采用的是圆锥近似法。通过使用四分之一沃尔特 - I型玻璃芯轴的复制方法，在全壳碳纤维增强塑料箔的内表面形成了一层由铂制成的反射面。2013年5月和11月在同步辐射设施“SPring - 8”对该反射镜的质量进行了测量。确认了二次反射，聚焦光束的半功率直径为5角分。
Wolter-I thin-foil-nested X-ray telescopes onboard Japanese satellites such as ASCA, Suzaku and ASTRO-H, can achieve a large effective area with low total weight. The image quality of these telescopes are limited, however, since substrates of reflectors are thin aluminum foils, and it is difficult to maintain the original shapes of the reflectors. In order to improve the image quality, we attempt to use carbon fiber reinforced plastic (CFRP) that has higher stiffness than aluminum as the substrate of reflectors. Furthermore, paraboloids and hyperboloids in the Wolter-I optics can be realized easily by CFRP, whereas a conical approximation has been applied to the aluminum substrate used in the past telescopes onboard Japanese satellites. A reflective surface made of a single layer of Pt is formed on the inner surface of a full-shell CFRP foil by a replica method using a quadrant Wolter-I glass mandrel. The quality of this mirror was measured at the synchrotron radiation facility, SPring-8, in May and November 2013. The double reflection was confirmed, and the half power diameter of the focused beam was 5 arcmin.