Comparison of technology for high-power laser mirrors and synchrotron radiation mirrors.

摘要

There are obvious differences but some surprising similarities between high-power laser mirrors designed for use in the visible and infrared wavelengths and synchrotron mirrors designed for use at x-ray wavelengths. The use of synchrotron mirrors at grazing incidence results in a relaxation of figure, surface microroughness, and thermal heating tolerances relative to the wavelength of nearly two orders of magnitude. As a result, the tolerances become roughly comparable to those desired for high-power laser mirrors for the visible region of the spectrum. Experience gained over the years by laser mirror designers in substrate design, the influence of metallic coatings on thermal and optical performance and limiting values for surface microroughness may be helpful to designers of synchrotron systems, but exploitation of the promise of the new synchrotron systems still represents a challenging problem for researchers. The specifications and operational approaches to meeting them for the new Advanced Photon Source at Argonne National Laboratory are given.