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Proceedings Paper

Research of nested X-ray concentrator for future X-ray timing astronomy
Author(s): Lizhi Sheng; Baosheng Zhao; Pengfei Qiang; Duo Liu
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Paper Abstract

X-ray grazing incidence optics are widely used in X-ray astronomy, especially for imaging payloads Wolter optics are the most workhorse. However, as there are two cascaded mirrors in Wolter type, the efficiency is quite low after two reflections. In this paper a kind of nested conical concentrator is developed with only one reflection to concentrate the X-ray photons and obtain the timing information. The mirror length is 200mm, the mirror foils cover from 38.8 to 100mm in diameter. D263T glass of 0.3mm thickness is used as mirror substrate with Iridium film deposited in order to improve the X-ray reflection. The D263T glass is slumped at 580°C with precisely machined and polished mold. 3D printed resin serves as upper mold for glass cutting. The quality of mirror substrate is mainly determined by the surface of forming mandrel. As the surface roughness is quite important for X-ray reflection, after deposition it is tested with interferometer and AFM, and the roughness is 0.6nm. Mirror integration based on visible light is built, and the conical mirrors are assembled and adjusted by real time monitoring for the focal point of visible light. With the monochromic X-ray source, the concentrator efficiency is tested as 38%@1.49keV, 20%@4.51keV. The focal point is Φ8.2mm in Xray, with 80% of its energy encircled in a 4mm width. This kind of X-ray concentrator could be used in X-ray navigation, X-ray communication and other X-ray timing astronomy.

Paper Details

Date Published: 20 February 2017
PDF: 5 pages
Proc. SPIE 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics, 103280M (20 February 2017); doi: 10.1117/12.2268991
Show Author Affiliations
Lizhi Sheng, Xi'an Institute of Optics and Precision Mechanics (China)
State Key Lab. of Geo-information Engineering (China)
Baosheng Zhao, Xi'an Institute of Optics and Precision Mechanics (China)
Pengfei Qiang, Xi'an Institute of Optics and Precision Mechanics (China)
Duo Liu, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 10328:
Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics
T. Goji Etoh; Hiroyuki Shiraga, Editor(s)

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