Accession Number : ADP008069

Title :   Image Quality and Scattering by Multilayer X-Ray Mirrors and its Implication for the Fabrication of Diffraction Limited Large X-Ray Optics,

Corporate Author : IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY

Personal Author(s) : Spiller, Eberhard

Report Date : 05 MAR 1992

Pagination or Media Count : 3

Abstract : Roughness of the boundaries presents a severe limitation for the performance of multilayer x-ray mirrors with small periods A < 50 A, and makes ir difficult to produce efficient multilayers with periods approaching the size of the atoms in the coating. Reflectivities are reduced by a large factor from the theoretical smooth boundary value, for example nearly a factor 10 for a coating with period A = 30 A. If all the loss in reflectivity would appear as scattered light within the field of view of an instrument, one would not be able to obtain high contrast images of extended objects; each image element would be surrounded by a halo of scattered light of much higher total intensity.

Descriptors :   *OPTICS, *X RAYS, *MIRRORS, FABRICATION, DIFFRACTION, LIGHT SCATTERING, IMAGES, ROUGHNESS, ATOMS, COATINGS, REFLECTIVITY, CONTRAST, INTENSITY, REDUCTION.

Subject Categories : Optics
      Nuclear Physics & Elementary Particle Physics
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE