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Development of X-ray telescope optamized for a quest for the missing baryons

X射线望远镜的开发优化了寻找失踪重子的过程

基本信息

批准号：
15340063
负责人：
OGASAKA Yasushi
金额：
$ 9.22万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15340063/
关键词：
X-ray telescope Multi-stage X-ray telescope Wide-field X-ray telescope X-ray composite mirror X-ray multilayer X-ray optical constant Large scale structure Intergalactic plasma X線反射鏡宇宙プラズマ X線天文学軟X線望遠鏡多層膜

项目摘要

Development of cryogenic detectors with ultrahigh energy resolution enables us to perform emission/absorption line diagnostics of cosmic plasmas. Such observation is important to study formation and evolution of large scale structures. The purpose of this research project is to develop wide-field soft X-ray telescope optimized for observing diffuse X-ray emitting plasmas.Significant results were obtained mainly on the following subjects ; development of composite-layer and multilayer soft X-ray mirrors, evaluation of X-ray optical constants using synchrotron radiation facility, and development of multistage X-ray telescope.On the development of soft X-ray mirrors, C-Ni-Pt composite-layer mirrors have been successfully fabricated and its X-ray characteristics have been measured. A 10 to 40% gain of effective area is expected for a telescope consists of such mirrors, comparing to previous total reflection mirrors. Also Ni/C multilayer-supermirror was applied to 2-10 keV region successful … More ly for the first time. A 30% reflectivity at 1 deg was obtained. At this incidence angle total external reflectivity is nearly zero, and the result is very promising for future development of soft X-ray telescopes.For the purpose of characterizing optical constants of soft X-ray mirrors, we organized experiments at SPring-8. The first machine time was dedicated for evaluating gold-coated soft X-ray mirror for Astro-E2 mission. Complexed M-edge absorption structures were measured in 2-4 keV range with precision of 0.5 eV and similar accuracy. This is on-going experiment.Four-stage conical telescope has been designed and partly fabricated, based on optics design of warm/hot intergalactic medium survey mission DIOS. Comparing to previous telescopes, DIOS reflectors have almost ten times larger incidence angle and three times shorter stage length. Replication technique for unexperienced materials like Ni or Al also needs to be investigated. Each of these key technologies have been developed and it has been shown that the mission requirement can be satisfied with a telescope thus fabricated. Less

具有超高能量分辨率的低温探测器的发展使我们能够进行宇宙等离子体的发射/吸收线诊断。这种观测对于研究大尺度结构的形成和演化具有重要意义。本课题的研究目的是研制用于观测漫反射X射线发射等离子体的广视场软X射线望远镜，主要在复合层和多层软X射线反射镜的研制、利用同步辐射装置估算X射线光学常数、多级X射线望远镜的研制等方面取得了重要成果。在软X射线反射镜的研制中，成功地制备了C-Ni-Pt复合层反射镜，并对其X射线特性进行了测试。与以前的全反射镜相比，由这种反射镜组成的望远镜的有效面积有望增加10%到40%。并成功地将Ni/C多层膜超反射镜应用于2-10keV区的…这是第一次。在1°处获得了30%的反射率。在此入射角下，总外反射率几乎为零，这一结果对软X射线望远镜的未来发展非常有希望。为了表征软X射线反射镜的光学常数，我们在Spring-8上组织了实验。第一台机器时间专门用于评估Astro-E2任务的镀金软X射线镜。在2-4keV范围内测量了复杂的M边吸收结构，测量精度为0.5 eV，精度相近。这是一项正在进行的实验。基于温暖/热星系际介质探测任务Dios的光学设计，设计并部分制造了四级锥形望远镜。与以前的望远镜相比，Dios反射镜的入射角增加了近十倍，工作台长度缩短了三倍。还需要研究像镍或铝这样没有经验的材料的复制技术。这些关键技术中的每一项都已经开发出来，并且已经表明，用这样制造的望远镜就可以满足任务要求。较少