Calibration of Astro-D telescope with an x-ray pencil beam
Calibration of Astro-D telescope with an x-ray pencil beam
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用 X 射线笔形束校准 Astro-D 望远镜
DOI：
10.1117/12.167219
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Y. Soong
中科院分区：
文献类型：
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作者：
Y. Tsusaka;Hisanori Suzuki;H. Awaki;K. Yamashita;H. Kunieda;Y. Tawara;Y. Ogasaka;Y. Uchibori;H. Honda;M. Itoh;H. Tsunemi;K. Hayashida;S. Nomoto;M. Wada;E. Miyata;P. Serlemitsos;L. Jalota;Y. Soong
用ISAS 30 m X射线束线上的X射线笔形束对Asca上X射线望远镜的X射线光学特性进行了评价。在1.5 keV、4.5 keV和8.0 keV的每个能量下，获得四个XRT的总有效面积分别为约1300 cm 2、800 cm 2和450 cm 2。在理想情况下，这些值比射线追踪法计算的值小约15%。密排箔片的阴影效应可能是有效面积下降的主要原因。用X射线CCD测量了XRT的点扩散函数。我们还测量了杂散光的污染，这是由一次反射的光子（由主镜或次镜）和光子反射在镜壳的后侧表面上造成的。杂散光分布和强度与光线追迹模拟结果一致。
The x-ray optical properties of X-Ray Telescopes (XRTs) on board Asca were evaluated with an x-ray pencil beam at ISAS 30 m x-ray beam line. The total effective area of four XRTs is obtained to be about 1300 cm2, 800 cm2, and 450 cm2 at each energy of 1.5 keV, 4.5 keV, and 8.0 keV, respectively. These values are about 15% less than those calculated by ray tracing method in an ideal case. The shadow effect of closely packed foils might be the main reason for the degradation of effective area. The Point Spread Function of XRT was also measured by an x-ray CCD. We have also measured the contamination of stray light, which were caused by the one time reflected photons (by primary or secondary mirror) and photons reflected on the back side surface of the mirror shells. The stray light profile and intensity were consistent to the results simulated by the ray tracing.