Xtend, the soft x-ray imaging telescope for the x-ray imaging and spectroscopy mission (XRISM)
Xtend, the soft x-ray imaging telescope for the x-ray imaging and spectroscopy mission (XRISM)
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Xtend，用于 X 射线成像和光谱任务 (XRISM) 的软 X 射线成像望远镜
DOI：
10.1117/12.2626894
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
（他52名）
中科院分区：
文献类型：
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作者：
Mori Koji;Tomida Hiroshi;Nakajima Hiroshi;（他52名）
Xtend是为x射线成像和光谱学任务（XRISM）开发的软x射线成像望远镜。XRISM计划在日本2022财年推出。Xtend由软x射线成像仪（SXI）， x射线CCD相机和x射线反射镜组件（XMA）组成，x射线反射镜组件是一个薄箔嵌套的锥形近似Wolter-I光学元件。SXI使用p通道，背光型CCD，单侧成像面积为31mm。四个CCD芯片排列在2×2网格中，可以用单级斯特林冷却器冷却到- 120°C。XMA以共聚焦的方式将镀有金的薄铝箔包裹起来，外径为45厘米。为了减少杂散光，在x射线镜前安装了预准直器。结合SXI和XMA，焦距为5.6m，在0.4 ~ 13 keV的能量范围内实现了38 ‘ × 38 ’的视场。我们已经完成了SXI和XMA的飞行模型的制作。在一系列子系统级测试中成功进行了性能验证。我们还进行了地面校准测量，数据分析正在进行中。
Xtend is a soft x-ray imaging telescope developed for the x-ray imaging and spectroscopy mission (XRISM). XRISM is scheduled to be launched in the Japanese fiscal year 2022. Xtend consists of the soft x-ray imager (SXI), an x-ray CCD camera, and the x-ray mirror assembly (XMA), a thin-foil-nested conically approximated Wolter-I optics. The SXI uses the P-channel, back-illuminated type CCD with an imaging area size of 31mm on a side. The four CCD chips are arranged in a 2×2 grid and can be cooled down to −120 °C with a single-stage Stirling cooler. The XMA nests thin aluminum foils coated with gold in a confocal way with an outer diameter of 45 cm. A pre-collimator is installed in front of the x-ray mirror for the reduction of the stray light. Combining the SXI and XMA with a focal length of 5.6m, a field of view of 38′ × 38′ over the energy range from 0.4 to 13 keV is realized. We have completed the fabrication of the flight model of both SXI and XMA. The performance verification has been successfully conducted in a series of sub-system level tests. We also carried out on-ground calibration measurements and the data analysis is ongoing.