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W/SiC X-ray multilayers optimized for use above 100 keV

Windt, David L. and Donguy, Soizik and Hailey, Charles J. and Koglin, Jason and Honkimaki, Veijo and Ziegler, Eric and Christensen, Finn E. and Chen, C. M. Hubert and Harrison, Fiona A. and Craig, William W. (2003) W/SiC X-ray multilayers optimized for use above 100 keV. In: X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy. Proceedings of SPIE. No.4851. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 639-646. ISBN 0-8194-4630-0.

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We have developed a new depth-graded multilayer system comprising W and SiC layers, suitable for use as hard X-ray reflective coatings operating in the energy range 100 - 200 keV. Grazing incidence X-ray reflectance at E=8 keV was used to characterize the interface widths, as well as the temporal and thermal stability in both periodic and depth-graded W/SiC structures, while synchrotron radiation was used to measure the hard X-ray reflectance of a depth-graded multilayer designed specifically for use in the range E~150 - 170 keV. We have modeled the hard X-ray reflectance using newly-derived optical constants, which we determined from reflectance-vs-incidence angle measurements also made using synchrotron radiation, in the range E=120 - 180 keV. We describe our experimental investigation in detail, compare the new W/SiC multilayers with both W/Si and W/B4C films that have been studied previously, and discuss the significance of these results with regard to the eventual development of a hard X-ray nuclear line telescope.

Item Type:Book Section
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Christensen, Finn E.0000-0001-5679-1946
Harrison, Fiona A.0000-0003-2992-8024
Additional Information:© 2003 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was funded by an SR&T grant from NASA.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Series Name:Proceedings of SPIE
Issue or Number:4851
Record Number:CaltechAUTHORS:20180111-125339316
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Official Citation:David L. Windt, Soizik Donguy, Charles J. Hailey, Jason Koglin, Veijo Honkimaki, Eric Ziegler, Finn Erland Christensen, C. M. Hubert Chen, Fiona A. Harrison, William W. Craig, "W/SiC X-ray multilayers optimized for use above 100 keV", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461303
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84259
Deposited On:11 Jan 2018 21:13
Last Modified:15 Nov 2021 20:18

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