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; Michael J. Pivovaroff

doi:10.1117/12.826669

31 August 2009 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, Michael J. Pivovaroff

Author Affiliations +

Proceedings Volume 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV; 743716 (2009) https://doi.org/10.1117/12.826669
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

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, di = a/(b + i)^c, and we optimize over the total number of bi-layers, N, c, and the maximum bi-layer thickness, dmax. The result is a 10 mirror group design optimized for a flat even energy response both on and off-axis.

Citation Download Citation

Kristin K. Madsen, Fiona A. Harrison, Peter H. Mao, Finn E. Christensen, Carsten P. Jensen, Nicolai Brejnholt, Jason Koglin, and Michael J. Pivovaroff "Optimizations of Pt/SiC and W/Si multilayers for the Nuclear Spectroscopic Telescope Array", Proc. SPIE 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV, 743716 (31 August 2009); https://doi.org/10.1117/12.826669

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available