Two-Dimensional Differential Deposition and Erosion for Thin-Shell Figure Correction, and Non-Distorting, High-Energy X-ray Multilayers

We propose to continue our development of two-dimensional differential deposition and erosion, a novel methods for high-throughput surface height error correction in thin-shell cylindrical mirror substrates. We also propose to develop non-distorting X-ray reflective multilayer coatings for use above 80 keV. Our specific research objectives are: (a) develop two-dimensional control of film deposition and erosion to correct both low- and mid-frequency surface height errors in cylindrical, thin-shell mirror substrates, and (b) develop high-efficiency, non-distorting, zero net-stress, and stress balanced, reflective multilayer coatings for use above 80 keV.

The Astrophysics Research and Analysis program (APRA) supports suborbital and suborbital-class investigations, development of detectors and supporting technology, laboratory astrophysics, and limited ground-based observing. Basic research proposals in these areas are solicited for investigations that are relevant to NASA's programs in astronomy and astrophysics, including the entire range of photons, gravitational waves, and particle astrophysics. The emphasis of this solicitation is on technologies and investigations that advance NASA astrophysics missions and goals.

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