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Beamline 20-BM-B: X-ray Absorption Spectroscopy Beamline

X-ray Science Division, APS
Materials Science, Environmental Science, Chemistry

Description

General purpose x-ray spectroscopy beamline with multiple detection and sample environment capabilities. A toroidal focusing mirror is standard to 32 keV. Unfocused the energy range increases to 35 keV. Variable-angle harmonic-rejection mirror can also focus vertically to 30 micron. KB mirror focusing/x-ray microprobe can be set up upon request to provide 5 mcicron focus. A polycapillary optic can provide a high flux 25 micron focus. A small 4-circle kappa geometry diffractometer is available.

 

Supported Techniques

  • X-ray absorption fine structure
  • Microfluorescence (hard x-ray)
  • micro X-ray absorption fine structure
  • Diffraction anomalous fine structure

Beamline Controls and Data Acquisition

Windows 7 with LabView, SPEC.

Detectors

  • Ionization chambers
  • 13-element and single-element Ge
  • Pilatus 100K
  • Vortex Si Drift
  • NaI scintillation
  • Si diodes
  • Log spiral fluorescence detector
  • Optical spectrometer

Additional Equipment

  • 4-circle kappa geometry diffractometer
  • Displex low temperature stage (20-300K)
  • K-B mirror for 5 micron
  • Polycapillary for 25 micron

Local Contacts

Name MAHALING BALASUBRAMANIAN
Phone 630.252.0593
Name CHENGJUN SUN
Phone 630.252.0534
Name DALE L. BREWE
Phone 630.252.0582
Name STEVE M. HEALD
Phone 630.252.9795

Beamline Specs

Source

Bending Magnet

Monochromator Type

Si(111)

Energy Range

2.7-35 keV

Resolution (ΔE/E)

1.4 x 10 -4

Flux (photons/sec)

2 x 1010 @10 keV

Beam Size (HxV)

Focused

10000µm x 30µm

Unfocused

10mm x 1mm

Monochromator Type

Si(111)

Energy Range

2.7-25 keV

Resolution (ΔE/E)

1.4 x 10 -4

Flux (photons/sec)

2 x 108 @10 keV

Beam Size (HxV)

Focused

5µm x 5µm

Monochromator Type

Si(111)

Energy Range

2.7-35 keV

Resolution (ΔE/E)

1.4 x 10 -4

Flux (photons/sec)

3 x 1010 @10 keV

Beam Size (HxV)

Focused

25µm x 25µm

Monochromator Type

Si(111)

Energy Range

2.7-32 keV

Resolution (ΔE/E)

1.4 x 10 -4

Flux (photons/sec)

1 x 1011 @10 keV

Beam Size (HxV)

Focused

200µm x 500µm

For additional information see:
http://www.aps.anl.gov/Sectors/Sector20/

Current Status:

Operational/Accepting General Users

Access Mode:

On-site