Characterization of the Advanced Satellite for Cosmology and Astrophysics x-ray telescope: preflight calibration and ray tracing.
Characterization of the Advanced Satellite for Cosmology and Astrophysics x-ray telescope: preflight calibration and ray tracing.
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宇宙学和天体物理学 X 射线望远镜先进卫星的表征：飞行前校准和射线追踪。
DOI：
10.1364/ao.34.004848
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发表时间：
1995
期刊：
影响因子：
1.9
通讯作者：
Y. Soong
中科院分区：
文献类型：
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作者：
Y. Tsusaka;H. Suzuki;K. Yamashita;H. Kunieda;Y. Tawara;Y. Ogasaka;Y. Uchibori;H. Honda;M. Itoh;H. Awaki;H. Tsunemi;K. Hayashida;S. Nomoto;M. Wada;E. Miyata;P. Serlemitsos;L. Jalota;Y. Soong
利用X射线笔形束对宇宙学和天体物理学高级卫星ASCA上的多层薄膜镜X射线望远镜（XRT）的X射线特性进行了全面评估。用X射线笔形束扫描直径为35厘米的望远镜孔径，我们发现一组XRT的有效面积为325、200和113厘米（2），能量为1.5，4.5和8.0 keV。我们推导出的点扩散函数（PSF的）的XRT的通过测量的图像轮廓在焦平面与X射线CCD。发现PSF呈现出集中在30弧秒内的尖锐核心和半功率直径延伸至3弧分的宽翼。我们还评估了杂散光的贡献，这是由主镜或次镜的X射线的单次反射和反射镜的背面反射引起的。为了获得在0.5-10.0 keV的能量区域中的XRT的特性，结合在离散能量的测量，我们开发了一种射线跟踪方法与望远镜的设计参数，PSF和光学常数。特别是，我们获得周围的金原子M壳层（Au-M）吸收边能量的光学常数通过测量我们的镜子样品的反射率，单色化的X射线在2.0-3.5 keV的能量范围内从同步辐射。考虑到点扩散函数和光学常数，我们发现我们的光线追迹程序可以重现所有这些XRT性能。
The x-ray properties of multinested thin-foil mirror x-ray telescopes (XRT's) on board ASCA, the Advanced Satellite for Cosmology and Astrophysics, were fully evaluated with an x-ray pencil beam.Scanning over the telescope aperture of 35 cm in diameter with an x-ray pencil beam, we found the effective area of a set of XRT's to be 325, 200, and 113 cm(2) at energies of 1.5, 4.5, and 8.0 keV, respectively. We derive the point-spread functions (PSF's) of the XRT's by measuring the image profile at the focal plane with an x-ray CCD. The PSF is found to exhibit a sharp core concentrated within 30 arcsec and a broad wing extended to 3 arcmin in half-power diameter. We also evaluate the contribution of stray light, which is caused by the single reflection of x rays by primary or secondary mirrors and by the backside reflection of the mirrors. To obtain the characteristics of the XRT in the energy region of 0.5-10.0 keV, incorporated with the measurements at discrete energies, we develop a ray-tracing method with the telescope design parameter, the PSF, and optical constants. In particular, we obtain the optical constants around the gold-atom M shell (Au-M) absorption-edge energies by measuring the reflectivity of our mirror sample, with monochromatized x-rays in the energy range of 2.0-3.5 keV from synchrotron radiation. Taking into account the PSF's and optical constants, we find that our ray-tracing program can reproduce all these XRT performances.
Ohashi Y：“中耳炎的最新进展”D.C.Pecker，4 (1993)
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