TY - JOUR
T1 - Optimizations of Pt/SiC and W/Si multilayers for the Nuclear Spectroscopic Telescope Array
AU - Madsen, K. K.
AU - Harrison, F. A.
AU - Mao, P. H.
AU - Christensen, Finn Erland
AU - Cooper-Jensen, Carsten P.
AU - Brejnholt, Nicolai
AU - Koglin, J.
AU - Pivovaroff, M. J.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
U2 - 10.1117/12.826669
DO - 10.1117/12.826669
M3 - Journal article
VL - 7437
JO - Proceedings of SPIE, the International Society for Optical Engineering
JF - Proceedings of SPIE, the International Society for Optical Engineering
SN - 0277-786X
IS - 743716
ER -