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Optimizations of Pt/SiC and W/Si multilayers for the Nuclear Spectroscopic Telescope Array

Madsen, Kristin K. and Harrison, Fiona A. and Mao, Peter H. and Christensen, Finn E. and Jensen, Carsten P. and Brejnholt, Nicolai and Koglin, Jason and Pivovaroff, Michael J. (2009) Optimizations of Pt/SiC and W/Si multilayers for the Nuclear Spectroscopic Telescope Array. In: Optics for EUV, X-Ray, and gamma-ray astronomy IV. Proceedings of SPIE. No.7437. Society of Photo-optical Instrumentation Engineers , Bellingham, WA, Art. No. 743716. ISBN 978-0-8194-7727-9.

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The Nuclear Spectroscopic Telescope Array, NuSTAR, is a NASA funded Small Explorer Mission, SMEX, scheduled for launch in mid 2011. The spacecraft will fly two co-aligned conical approximation Wolter-I optics with a focal length of 10 meters. The mirrors will be deposited with Pt/SiC and W/Si multilayers to provide a broad band reflectivity from 6 keV up to 78.4 keV. To optimize the mirror coating we use a Figure of Merit procedure developed for gazing incidence optics, which averages the effective area over the energy range, and combines an energy weighting function with an angular weighting function to control the shape of the desired effective area. The NuSTAR multilayers are depth graded with a power-law, d_i = a/(b + i)^c, and we optimize over the total number of bi-layers, N, c, and the maximum bi-layer thickness, d_(max). The result is a 10 mirror group design optimized for a flat even energy response both on and off-axis.

Item Type:Book Section
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URLURL TypeDescription
Madsen, Kristin K.0000-0003-1252-4891
Harrison, Fiona A.0000-0003-2992-8024
Christensen, Finn E.0000-0001-5679-1946
Additional Information:© 2009 SPIE. Online Publication Date: 31 August 2009.
Group:Space Radiation Laboratory, NuSTAR
Series Name:Proceedings of SPIE
Issue or Number:7437
Record Number:CaltechAUTHORS:20101216-103846060
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Official Citation:Optimizations of Pt/SiC and W/Si multilayers for the Nuclear Spectroscopic Telescope Array Kristin K. Madsen, Fiona A. Harrison, Peter H. Mao, Finn E. Christensen, Carsten P. Jensen, Nicolai Brejnholt, Jason Koglin, and Michael J. Pivovaroff, Proc. SPIE 7437, 743716 (2009), DOI:10.1117/12.826669
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21394
Deposited By: Tony Diaz
Deposited On:16 Dec 2010 22:09
Last Modified:09 Nov 2021 15:56

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