S. Bongiorno

TL;DR: The Imaging X-ray Polarimetry Explorer (IXPE) as mentioned in this paper is a NASA Astrophysics Small Explorer mission with significant contributions from the Italian space agency (ASI) with three identical x-ray telescopes, each comprised of a 4m-focal-length mirror module assembly.

TL;DR: To achieve high-angular resolution, MSFC is exploring significant technology advances needed to control sources of figure error including fabrication- and coating-induced stresses and mounting-induced distortions.

TL;DR: The Focusing Optics X-ray Solar Imager (FOXSI) sounding rocket experiment demonstrates the technique of focusing hard Xray (HXR) optics for the study of fundamental questions about the high-energy Sun as mentioned in this paper.

TL;DR: The FOXSI-4 sounding rocket will fly a significantly upgraded instrument in NASA's first solar are campaign as discussed by the authors, which will use highly polished electroformed Wolter-I mirrors fabricated at the NASA/Marshall Space Flight Center (MSFC), together with finely pixelated Si CMOS sensors and fine-pitch CdTe strip detectors provided by a collaboration with institutes in Japan.

TL;DR: In this article, the authors presented a ray-tracing simulation to characterize a background pattern of singly reflected rays generated by photons at certain incident angles reflecting on only one of a two-segment Wolter-I figure and still reaching the focal plane.