A ground calibration of the engineering model of the SXT onboard ASTRO-H using the ISAS 30m pencil beam facility
A ground calibration of the engineering model of the SXT onboard ASTRO-H using the ISAS 30m pencil beam facility
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使用 ISAS 30m 笔形梁设施对 ASTRO-H 上的 SXT 工程模型进行地面校准
DOI：
10.1117/12.925860
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
K.
中科院分区：
文献类型：
--
作者：
Ichihara;K.
日本的ASTRO-H任务计划于2014年发射，将携带几台仪器，覆盖从几keV到600 keV的广泛能量范围。其中有四台薄箔嵌套式沃尔特I型X射线望远镜。其中两个是覆盖~12kev的软X射线望远镜(SXT)。它们中的每一个分别将图像聚焦在CCD相机(SXI)和热量计(SXS-XCS)的焦平面探测器上。2011年，我们对在Masa的戈达德太空飞行中心(GSFC)制造的SXT的象限工程模型(EM)进行了地面校准。地面校准结合了全球空间科学委员会和空间与航天科学研究所设施的测量结果。本文报道了在ISAS30米光束线装置上的定标结果。我们使用的是基线长度为30m的铅笔束的栅格SAN方法。测量了电磁象限的有效面积和角分辨率。1.49keV和4.51keV时的有效面积分别为147cm2和116cm2，角长约20 mm。我们还测量了嵌套反射镜的不同部分的成像性能。外半径处的角分辨率大于内半径处的角分辨率，且各象限在半径上的焦距不同。
The Japanese ASTRO-H mission, planned to be launched in 2014, will carry several instruments for covering a wide energy range from a few keV to 600 keV. Among them there are four thin-foil-nested Wolter-I X-ray telescopes. Two of them are Soft X-ray Telescopes (SXTs) covering up to ~12 keV. Each of them focuses an image on the focal plane detectors of the CCD camera (SXI) and the calorimeter (SXS-XCS), respectively. In 2011, we performed a ground calibration of a quadrant engineering model (EM) of SXT that was fabricated at MASA's Goddard Space Flight Center (GSFC). The ground calibration was made with a combination of the measurements at the GSFC and Institute of Space and Astronautical Science (ISAS) facilities. In this paper we report the results of the calibration at the ISAS 30m beamline facility. We used a raster san method with a pencil beam at the baseline length of 30m. An effective area and angular resolution of the EM quadrant were measured. The effective area is 147 cm2at 1.49 keV and 116 cm2at 4.51 keV, respectively, while the angular longer by ~20mm from nominal length. We also measured imaging performance in separate parts of nested mirrors. The angular resolution of parts at outer radius is larger than those at inner radius, and the quadrant have different focal lengths in radius.