Studies of Print-through and Reflectivity of X-ray Mirrors using Thin Carbon-Fiber-Reinforced Plastic
Studies of Print-through and Reflectivity of X-ray Mirrors using Thin Carbon-Fiber-Reinforced Plastic
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使用薄碳纤维增强塑料的 X 射线镜的透印和反射率研究
DOI：
10.1117/1.jatis.2.1.014002
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K.
中科院分区：
文献类型：
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作者：
S. Sugita;H. Awaki;K. Yoshioka;K. Ogi;H. Kunieda;H. Matsumoto;T. Miyazawa;I. Mitsuishi;T. Iwase;S. Saji;S.;Tachibana;M. Maejima;S. Yoshikawa;M. Shima;T. Ishikawa;T. Hamada;N. Ishida; H. Akiyama;K. Kishimoto;S. Utsunomiya;T. Kamiya;K.
我们用碳纤维增强塑料制造了X射线反射镜，采用了一种表面复制的方法，为X射线卫星设计了一个紧密嵌套的结构。我们研究了作为固化温度的函数在镜面上打印通过的影响。室温固化时，表面误差的均方根值为0.8 nm。用8keV X射线测量了反射率，通过模型拟合计算出粗糙度为0.5 nm-与ASTRO-H/HXT反射镜的粗糙度相当。我们验证了镜面在6个月内的长期稳定性。我们制作了直径为200 mm的Wolter I型象限壳镜，并在Spring8同步辐射装置上的BL20B2上进行了X射线测量。我们用一束20keV的x射线斑点光束，分别沿径向和周向狭缝，获得了反射镜的反射像。每面镜图像的平均半功率直径(HPD)在镜中心为1.2弧分，在边缘为3.0弧分。在狭缝尺寸较小的SPOT图像中，我们在最好的情况下获得了0.38弧分的HPD。
We fabricated x-ray mirrors from carbon-fiber-reinforced plastic with a tightly nested design for x-ray satellites, using a replication method for the surfaces. We studied the effects of print-through on the mirror surface as a function of curing temperature. With room temperature curing, the root-mean-square value of the surface error was 0.8 nm. The reflectivity was measured using 8-keV x-rays, and the roughness was calculated as 0.5 nm by model fitting—comparable to that of the ASTRO-H/HXT mirror. We verified the long-term stability of the mirror surface over 6 months. We fabricated Wolter type-I quadrant-shell mirrors with a diameter of 200 mm and performed x-ray measurements at BL20B2 in the SPring-8 synchrotron radiation facility. We obtained reflection images of the mirrors using a 20-keV x-ray spot beam with a slit size ofin the radial and circumferential directions, respectively. The averaged half-power diameter (HPD) of the images in one mirror was 1.2 arc min in the circumferential center of the mirror and 3.0 arc min at the edge. In the spot images with a smaller slit size of, we achieved an HPD of 0.38 arc min in the best case.