XAFS at the Pacific Northwest Consortium-Collaborative Access Team undulator beamline

Steve Heald, Edward Stern, Dale Brewe, Robert Gordon, Daryl Crozier, Detong Jiang, Julie Cross

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

The Pacific Northwest Consortium-Collaborative Access Team (PNC-CAT) has begun operating an insertion device beamline at the Advanced Photon Source. The beamline has been extensively used for XAFS studies. This paper summarizes its capabilities, and our initial operational experience. The beamline is based on APS undulator A, and incorporates full undulator scanning. The monochromator is liquid nitrogen cooled and has both Si(111) and Si(311) crystals in a side-by-side configuration. Crystal changes only take a few minutes. The crystals cover the energy range from 3-50 keV with fluxes as high as 2×1013 ph/sec. Microbeams can be produced using Kirkpatrick-Baez mirrors (spot size 1-3 μm) or tapered capillaries (sub-μm spots). When these optics are combined with a 13-element Ge detector, the beamline provides powerful microbeam imaging and spectroscopy capabilities. Experimental examples from the environmental field and in-situ UHV film growth will be discussed.

Original languageEnglish
Pages (from-to)342-344
Number of pages3
JournalJournal of Synchrotron Radiation
Volume8
Issue number2
DOIs
StatePublished - 1 Mar 2001
Externally publishedYes

Keywords

  • MBE
  • Microfocusing
  • Undulator beamline

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