Design and testing of the Optics for FXT onboard EP satellite

IF 2.7 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Experimental Astronomy Pub Date : 2023-02-06 DOI:10.1007/s10686-022-09870-9

Yanji Yang, Yusa Wang, Dawei Han, Juan Wang, Weiwei Cui, Yuxuan Zhu, Min Cong, Jia Ma, Zijian Zhao, Dongjie Hou, Xiongtao Yang, Can Chen, Bing Lu, He Lv, Wenxin Sun, Jiawei Zhang, Ke Yu, Shaohuai Wang, Dongxu Liu, Qian Zhang, Xiyan Bi, Fangjun Lu, Peter Friedrich, Josef Eder, Katinka Hartmann, Vadim Burwitz, Arnoud Keereman, Andrea Santovincenzo, Dervis Vernani, Giovanni Bianucci, Giuseppe Valsecch, Lizhi Sheng, Yongqing Yan, Pengfei Qiang, Bo Wang, Langping Wang, Dianlong Wang, Fei Ding, Lei Wang, Junsheng Cheng, Yong Chen

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引用次数: 1

Abstract

The Einstein Probe (EP) mission is a science mission designed for the time domain astronomy, which is approved by the Chinese Academy of Sciences (CAS) in 2017 and is to be launched in 2023 with a duration time of more than 3 years. The Follow-up X-ray Telescope (FXT) is an important payload onboard EP, which employs the Wolter I focusing mirror as the X-ray collection unit and the PNCCD as the focal plane detector. The Phase C study has been finished in 2021. During the Phase C, the structural and thermal model (STM) of the mirror assembly of FXT, provided by the European Space Agency (ESA), a mirror assembly developed by the Institute of High Energy Physics (IHEP), a qualification model (QM) PNCCD and other components, are integrated and tested in IHEP. All optical performances meet the goal requirement of EP, such as the field of view of 60 arcmins, the angular resolution of less than 30 arcsec HEW on-axis, and the focal length of ab. 1600 mm. After that, the FXT is assembled, integrated, and tested on the EP satellite platform. Furthermore, these performances are not changed after the mechanical and thermal tests on the spacecraft platform.

Abstract Image

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EP卫星FXT光学系统的设计与测试

爱因斯坦探测器(EP)任务是一项针对时域天文学设计的科学任务，于2017年获得中国科学院(CAS)批准，将于2023年发射，为期3年以上。后续x射线望远镜(FXT)是EP的重要载荷，采用Wolter I型聚焦镜作为x射线采集单元，PNCCD作为焦平面探测器。C期研究已于2021年完成。在C阶段，FXT的镜面组件的结构和热模型(STM)由欧洲空间局(ESA)提供，镜面组件由高能物理研究所(IHEP)开发，资格模型(QM) PNCCD和其他组件在IHEP集成和测试。所有光学性能均满足EP的目标要求，视场60角分，轴向角分辨率小于30角秒，焦距ab. 1600 mm。之后，FXT在EP卫星平台上进行组装、集成和测试。此外，在航天器平台上进行力学和热试验后，这些性能没有改变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experimental Astronomy 地学天文-天文与天体物理

CiteScore

5.30

自引率

3.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments. Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields. Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.