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Proceedings Paper

Current progress of x-ray multilayer telescope optics based on thermally slumping glass for eXTP mission
Author(s): Zhengxiang Shen; Jun Yu; Bin Ma; Zhong Zhang; Qiushi Huang; Xiaoqiang Wang; Kun Wang; Fuchang Zuo; Zhengxin Lv; Zhanshan Wang
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Paper Abstract

The enhanced X-ray Timing and Polarimetry (eXTP) is a science mission designed to study the state of matter under extreme conditions of density, gravity and magnetism. One of the approaches to obtain large collecting areas is mounting the thermally slumping glass segments (SG) in a nested conical approximation Wolter-I design telescope. In the last two years, we have made a great progress in the research of telescope on the base of thermally slumping glass technology, and successfully fabricated several prototypes for the eXTP SFA mission. This paper intends to provide an overview of the progress. Now we can routinely produce cylindrical glasses with 36-60″ resolution (HPD) and the best mirror produced has an angular resolution of 36″ (HPD). The glass substrates coated with Pt and C layers to obtain high reflectivity of X-ray at 1-10keV, and the reliability of multilayers coating studies are under way as well. The in-situ measurement system and 3-dimention ray-tracing program have developed and can feed measurement data back into the assembly process for improving upon the later mounted mirrors in real time. We fabricated a 3-layer telescope prototype with the diameter of 106mm and focal length of 2000mm, and tested the focusing performance in SSRF, China. The measured HPD is 66″, and W90 is 168″, which meets the requirement of angular resolution of eXTP/SFA.

Paper Details

Date Published: 6 July 2018
PDF: 12 pages
Proc. SPIE 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, 106991B (6 July 2018); doi: 10.1117/12.2312629
Show Author Affiliations
Zhengxiang Shen, Tongji Univ. (China)
Jun Yu, Tongji Univ. (China)
Bin Ma, Tongji Univ. (China)
Zhong Zhang, Tongji Univ. (China)
Qiushi Huang, Tongji Univ. (China)
Xiaoqiang Wang, Tongji Univ. (China)
Kun Wang, Tongji Univ. (China)
Fuchang Zuo, Beijing Institute of Control Engineering (China)
Zhengxin Lv, Beijing Institute of Control Engineering (China)
Zhanshan Wang, Tongji Univ. (China)

Published in SPIE Proceedings Vol. 10699:
Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Shouleh Nikzad; Kazuhiro Nakazawa, Editor(s)

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