Accession Number:

ADA267149

Title:

Laboratory for X-Ray Optics

Descriptive Note:

Final rept. 1 Jan 90-28 Feb 93,

Corporate Author:

ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER

Personal Author(s):

Report Date:

1993-04-29

Pagination or Media Count:

9.0

Abstract:

During this period we concentrated our effort in two areas 1 growth of epitaxial single-crystal beryllium films and 2 multilayers and interfaces of material pairs incorporating new materials for multilayer x-ray optics. To date we have succeeded in growing epitaxial single-crystal films of beryllium on alpha-AI2O3 sapphire, silicon, and germanium using molecular beam epitaxy MBE. This is a major development since beryllium is an excellent spacer for the difficult but desirable water window wavelengths 24 A lambda 44 A. To our knowledge, this is the first time beryllium has been grown epitaxially on any substrate. Our best quality beryllium films were grown on silicon. The ability to grow a single crystal layer of beryllium is a promising first step toward a beryllium-based single-crystal mirror. In the area of new material pairs. we began by using theoretical reflectivity calculations to assemble a list of promising new material pairs. We then prioritized this list by using what was already known about the materials, such as phase diagrams and diffusion studies. These materials pairs then were studied by sputtering andor MBE.

Subject Categories:

  • Laminates and Composite Materials
  • Crystallography
  • Optics
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE