Tuesday, September 18, 2007, 4:00 pm — NSLS-II Seminar Room, Bldg. 817
I will introduce the design and development of new optics for sub-meV-resolution x-ray scattering spectroscopy. The basic principle of monochromatization and spectral analysis exploits the effect of angular dispersion in asymmetric backscattering, based on which several optics designs, including the collimator-dispersor-selector (CDS) backward geometry, CDDS inline forward geometry, and CCDS non-backscattering geometry can be developed. The detailed principles, dynamical theory calculations, and preliminary studies (including topographic analysis of the crystal components) performed at APS will be presented.
I will also talk about multi-cavity Fabry-Perot interferometers (initialized at NSLS). In this scheme, by fabricating two or more resonant cavities on a single crystal, the Finesse and the Free Spectral Range can be simultaneously increased so that sub-meV resolution monochromatization can be achieved from a ~10 meV pre-monochromated beam. This principle enables us to fabricate ultra-compact high-resolution x-ray optics.
Hosted by: John Hill
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