Beamline 10.3.2 at ALS: a hard X-ray microprobe for environmental and materials sciences

J Synchrotron Radiat. 2004 May 1;11(Pt 3):239-47. doi: 10.1107/S0909049504005837. Epub 2004 Apr 21.

Abstract

Beamline 10.3.2 at the ALS is a bend-magnet line designed mostly for work on environmental problems involving heavy-metal speciation and location. It offers a unique combination of X-ray fluorescence mapping, X-ray microspectroscopy and micro-X-ray diffraction. The optics allow the user to trade spot size for flux in a size range of 5-17 microm in an energy range of 3-17 keV. The focusing uses a Kirkpatrick-Baez mirror pair to image a variable-size virtual source onto the sample. Thus, the user can reduce the effective size of the source, thereby reducing the spot size on the sample, at the cost of flux. This decoupling from the actual source also allows for some independence from source motion. The X-ray fluorescence mapping is performed with a continuously scanning stage which avoids the time overhead incurred by step-and-repeat mapping schemes. The special features of this beamline are described, and some scientific results shown.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Arabidopsis / chemistry
  • Cadmium Compounds / chemistry
  • California
  • Environmental Monitoring / instrumentation*
  • Environmental Monitoring / methods
  • Equipment Design
  • Materials Testing / instrumentation*
  • Materials Testing / methods
  • Metals / analysis
  • Nanotubes / chemistry
  • Nanotubes / ultrastructure
  • Soil Pollutants / analysis
  • Spectrometry, X-Ray Emission / instrumentation*
  • Spectrometry, X-Ray Emission / methods
  • Sulfides / chemistry
  • Systems Integration
  • Transducers*
  • X-Ray Diffraction / instrumentation*
  • X-Ray Diffraction / methods
  • X-Rays*
  • Zinc / analysis

Substances

  • Cadmium Compounds
  • Metals
  • Soil Pollutants
  • Sulfides
  • cadmium sulfide
  • Zinc