Experimental Station 2-3

Beam line 2-3 is a bending magnet side station dedicated to x-ray imaging and micro x-ray absorption spectroscopy (edge, EXAFS) as well as micro diffraction of biological, material, and geological samples.  A Kirkpatrick-Baez mirrors system is used to achieve microfocus with a beam size of ~ 2 x 2 microns. The energy range of the beam line optics covers 4.9-23 keV, with detection of fluorescent x-rays as low as Si. BL2-3 is equipped with a Vortex silicon drift detector and ionization chambers.  Sample positions are controlled with submicron accuracy by two different sample stages depending on the experiment.  BL2-3 is ideal for obtaining elemental maps of small samples (about 10 microns to 25 mm) as well as performing spectroscopy on selected points in the sample (~ 2 x 2 microns). 

Supported Techniques
X-ray absorption spectroscopy imaging
Main Scientific Disciplines
Environmental Sciences
Materials Sciences
Beam Line Specifications


1.3 Tesla Bend Magnet, 0.75 mrad acceptance

  Energy Range Resolution ΔE/E Spot Size Flux
Unfocused 4900-23000 eV ~5 x 10-4 2 x 2 microns ~1 x 1010



Kirkpatrick-Baez System (microfocus) Monochromator: water cooled, double crystal, Si(111), Si(220), Si(400).

Monochromator Crystal Glitch Library

Crystal changes need to be scheduled and coordinated in advance with BL support staff.


584 microns Be, 10.7 meters He, 15.2 microns C


Detectors: ionization chambers, Vortex Silicon Drift Detector, CCD detector for µXRD

Sample Positioning: Newport Micro sample positioner, SmarAct Piezo positioner for tomographysample positioner 

Sample Environment

Ambient temperature and pressure

Sample size: flexible, ~24 X 24 mm in one image, also accommodates larger samples

Data Acquisition and Analysis

Microscan GUI, MicroXAS, XMap Gui, SMAK (Microtoolkit), SixPAK.

X-ray Data Booklet

X-ray Wiki

Beam Line Phone
650-926-5223. On-site Users: Contact the Duty Operator at 9-926-4040
Beam Line Contact

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