Design and performance of the UNICAT insertion device beamline at the APS

P. Zschack, G. E. Ice, J. Z. Tischler, Hawoong Hong, D. Robinson, P. R. Jemian, B. C. Larson, Haydn Chen, G. G. Long, R. W. Broach

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations


The UNICAT collaboration at the APS has constructed an insertion device beamline facility to support fundamental research in advanced materials and condensed matter physics. The primary research techniques used by UNICAT members include structural crystallography, diffuse x-ray scattering, magnetic x-ray scattering, ultra-small-angle x-ray scattering, micro-beam scattering, inelastic x-ray scattering and spectroscopy, surface and interface scattering, coherent x-ray diffraction, and time-resolved techniques. To support these advanced x-ray techniques for a diverse scientific community, we chose a liquid-nitrogen cooled Si (111) double crystal monochromator, and a pair of coated, striped mirrors. Important parameters considered in the design of the beamline are x-ray flux, energy range and bandwidth, source demagnification, and harmonic contamination. The APS type A undulator is used to produce high-brilliance X-rays between 4 and 40 KeV. We achieve sagittal focusing by dynamically bending the monochromator second crystal, and meridional focusing by cylindrically bending one of the flat mirrors. The resulting x-ray beam delivered to the experimental stations can be focused, unfocused, or collimated. The overall design of this beamline layout and the major beamline components are described, and its performance is discussed with respect to impact on the scientific programs proposed for the facility.

Original languageEnglish
Title of host publicationSynchrotron Radiation Instrumentation, SRI 1999 - 11th US National Conference
EditorsPiero Pianetta, John Arthur, Sean Brennan
PublisherAmerican Institute of Physics Inc.
Number of pages4
ISBN (Electronic)1563969416, 9781563969416
StatePublished - 6 Jun 2000
Event11th US National Conference on Synchrotron Radiation Instrumentation, SRI 1999 - Stanford, United States
Duration: 13 Oct 199915 Oct 1999

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference11th US National Conference on Synchrotron Radiation Instrumentation, SRI 1999
Country/TerritoryUnited States


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