Date of Award
2019
Document Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
Department
Physics and Astronomy
Committee Chair
Don A. Gregory
Committee Member
Massimiliamo Bonamente
Committee Member
David M Broadway
Committee Member
Lingze Duan
Committee Member
Brian Ramsey
Subject(s)
X-ray optics, Optical coatings, Coating processes, Magnetron sputtering
Abstract
The design and development of an in-house X-ray optic multilayer coating deposition system and coating test facility has provided a substantial contribution to research and development of reflective X-ray optic coatings at NASA Marshall Space Flight Center (MSFC). An extensive validation study of the system's capabilities to deposit repeatable, multilayer reflective X-ray optic coatings of various complexities is discussed and the deposition of initial broadband multilayer coatings are presented. Additionally, a coating stress study has been conducted where intrinsic coating stress was measured and characterized for both periodic and depth-graded multilayer coatings. Several stress reduction techniques, post-deposition annealing and stress compensation, were investigated for their feasibility in reducing coating-induced substrate deflection. Upcoming astronomical X-ray missions will benefit from these studies because future telescope technologies will require minimally stressed reflective coatings as the optics themselves become more lightweight.
Recommended Citation
Gurgew, Danielle Nicole, "Development of low stress, broadband X-ray optic multilayer coatings" (2019). Dissertations. 197.
https://louis.uah.edu/uah-dissertations/197