High-resolution, lightweight, and low-cost x-ray optics for the Lynx observatory

William W. Zhang; Kim D. Allgood; Michael Biskach; Kai-Wing Chan; Michal Hlinka; John D. Kearney; James R. Mazzarella; Ryan S. McClelland; Ai Numata; Raul E. Riveros; Timo T. Saha; Peter M. Solly

doi:10.1117/1.JATIS.5.2.021012

26 April 2019 High-resolution, lightweight, and low-cost x-ray optics for the Lynx observatory

William W. Zhang, Kim D. Allgood, Michael Biskach, Kai-Wing Chan, Michal Hlinka, John D. Kearney, James R. Mazzarella, Ryan S. McClelland, Ai Numata, Raul E. Riveros, Timo T. Saha, Peter M. Solly

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Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 5, Issue 2, 021012 (April 2019). https://doi.org/10.1117/1.JATIS.5.2.021012

Abstract

We describe an approach to build an x-ray mirror assembly that can meet Lynx’s requirements of high-angular resolution, large effective area, light weight, short production schedule, and low-production cost. Adopting a modular hierarchy, the assembly is composed of 37,492 mirror segments, each of which measures ∼100 mm × 100 mm × 0.5 mm. These segments are integrated into 611 modules, which are individually tested and qualified to meet both science performance and spaceflight environment requirements before they in turn are integrated into 12 metashells. The 12 metashells are then integrated to form the mirror assembly. This approach combines the latest precision polishing technology and the monocrystalline silicon material to fabricate the thin and lightweight mirror segments. Because of the use of commercially available equipment and material and because of its highly modular and hierarchical building-up process, this approach is highly amenable to automation and mass production to maximize production throughput and to minimize production schedule and cost. As of fall 2018, the basic elements of this approach, including substrate fabrication, coating, alignment, and bonding, have been validated by the successful building and testing of single-pair mirror modules. In the next few years, the many steps of the approach will be refined and perfected by repeatedly building and testing mirror modules containing progressively more mirror segments to fully meet science performance, spaceflight environments, as well as programmatic requirements of the Lynx mission and other proposed missions, such as AXIS.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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William W. Zhang, Kim D. Allgood, Michael Biskach, Kai-Wing Chan, Michal Hlinka, John D. Kearney, James R. Mazzarella, Ryan S. McClelland, Ai Numata, Raul E. Riveros, Timo T. Saha, and Peter M. Solly "High-resolution, lightweight, and low-cost x-ray optics for the Lynx observatory," Journal of Astronomical Telescopes, Instruments, and Systems 5(2), 021012 (26 April 2019). https://doi.org/10.1117/1.JATIS.5.2.021012

Received: 5 November 2018; Accepted: 1 April 2019; Published: 26 April 2019

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