@inproceedings{131f3133fd8a42aab401a69ee32760aa,
title = "A concept for a deployable normal incidence EUV mirror based on shape memory alloy sheets",
abstract = "Based on the science case for the SMEX ESCAPE mission, a normal incidence EUV mirror mission would be an interesting follow on. Our provisional SmallSat/CubeSat design has a 1 m diameter primary deployable mirror. The mirror would be coated with multilayers for normal incidence EUV reflectivity. The deployable mirror substrate is a shape memory alloy (SMA). The SMA needs to be over coated with a material that can be polished and then smoothed further. The combination that worked well on an aluminum cylinder is a high phosphorous content electroless nickel (eNiP) super-polished and then coated with carbon nitride (CNx). The multilayers were deposited on the eNiP+CNx stack. We report here our progress toward putting in place the pieces for a proof of concept. We discuss a scale up of previous return to shape on sheets of NiTi and the ray tracing results that demonstrate a sufficient return to shape of 1 micron. Furthermore, corrections post deployment are possible if desired.",
keywords = "EUV Astronomy, NiTi, multilayers",
author = "Ulmer, {Melville P.} and Dugard, {Jeffrey H.} and Daniel Quispe and Buchholz, {Donald B.} and Stagon, {Steven P.} and Chung, {Yip Wah} and Jian Cao and Konstantina Kritikos and Nicolas Guerra and Stahl, {Mark T.} and Ron Shiri and Raj Vaidyanathan",
note = "Publisher Copyright: {\textcopyright} 2022 SPIE. All rights reserved.; Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray ; Conference date: 17-07-2022 Through 22-07-2022",
year = "2022",
doi = "10.1117/12.2630153",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "{den Herder}, {Jan-Willem A.} and Shouleh Nikzad and Kazuhiro Nakazawa",
booktitle = "Space Telescopes and Instrumentation 2022",
}