APS Spectroscopy Group
Sector-20 ID and BM Beamlines, & Sector-9 BM

at the Advanced Photon Source

Argonne National Laboratory
A Partnership between the X-ray Science Division and the Canadian Light Source
Canadian Light Source   Advanced Photon Source

20-ID: Sector 20 - Insertion Device Beamline



ID line: J. Synchrotron Rad. (2001). 8, 342-344    -   DOI: 10.1107/S0909049500015946

(older ref: J. Synchrotron Rad. (1999). 6, 347-349 - DOI: 10.1107/S090904959801677X  )

Microprobe: Nucl. Instr. Meth. Physics Research A 582 (2007) 215–217  -  DOI: 10.1016/j.nima.2007.08.109

LERIX: Rev. Sci. Instrum. 77 (6), 063901-1-063901-7 (2006). DOI: 10.1063/1.2204581

minIXS: Rev. Sci. Instrum. 83, 023901 (2012). DOI: 10.1063/1.3680598


Supported Techniques

·X-ray absorption fine structure (XAFS)
·X-ray Raman Scattering

·Resonant X-ray Emission Spectroscopy

·Confocal X-ray microscopy

·Time-resolved XAFS


·Material Science
·Environmental Science


Undulator A
Beamline Specs
Energy Range Monochromator Type (LN2-cooled) Resolution Flux @10keV Beam Size
(horiz x vert)
  Unfocused Focused
4.3-27 keV Si 111 1.4 x 10-4 1013 1mm x 3mm  
8-50 keV Si 311  0.3 x 10-4  2 x 10 12    
4.3-27 keV Si 111       400µm x 100µm
4.3-27 keV Si 111   1012   5µm x 5µm
4.3-27 keV Si 111   1011   2µm x 2µm
Beamline Controls and Data Acquisition
Windows 7 with LabView

· Microspec WDX wavelength dispersive spectrometer
· ionization chambers
· multi element and single element Ge
· NaI scintillation
· Pilatus 100K
· PIN diodes
· plastic scintillator
· Si diodes
· Log Spiral Fluorescence detectors

· LERIX Spectrometer

· miniXS Spectrometers

· Vortex Si drift (single, 4-element)

· Polycapillary, microchannel optics for confocal microscopy (work with single-element Vortex)

Additional Equipment
· Diffraction, reflectivity and standing wave chambers (20-ID-C)

Frequent APS Links:
Ops Information
SR Status
User Portal
Beamline Schedules
Advisory Committee
Argonne Guest House
Publication Database
Other Frequent Links:
Absorption of Gases
Estimate of photon flux
McMaster Tables
LBNL X-ray Tools
Commissioning Notebook
(internal only)

Physical Constants
X-ray Data Booklet

Sector 20 and 9-BM operations are supported by the US Department of Energy and the Canadian Light Source.
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