Experimental Station 14-3b

Beam line 14-3a, located on the downstream table in the BL14-3 hutch, is a bending magnet side station dedicated to x-ray imaging and micro x-ray absorption spectroscopy of biological, biomedical, materials, and geological samples.  Most often used for data collection at the S K edge, BL14-3 is the only SSRL beam line capable of XAS at the P K edge. During imaging mode, a Kirkpatrick-Baez (KB) mirror system is used to achieve microfocus with a beam size of ~ 5 x 5 microns. BL14-3b is equipped with a Vortex silicon drift detector and ionization chambers for imaging. Sample positions are controlled with submicron accuracy by a Newport sample stage, inside a He environment. BL14-3b is ideal for obtaining elemental maps of small samples (about 20 microns to 25 mm) as well as performing spectroscopy on selected points in the sample (~ 5 x 5 microns).

Status
Open
Supported Techniques
X-ray Absorption Spectroscopy
Tender x-ray absorption spectroscopy
Main Scientific Disciplines
Bioscience
Environmental Sciences
Geochemistry
Materials Sciences
Beam Line Specifications

Source

Bending Magnet

  Energy Range Resolution, ΔE/E Spot Size Flux (ph/s)
Focused 2100-5000 eV 1 x 10-4 5 x 5 µm 2 x 1010 

 

Optics

M0 mirror: Flat, bent, vertically collimating, 1 m, Si, Ni-coated

M1 mirror: Bent, toroidal, 1.2 m, Ni-coated  

Monochromator: Water-cooled Si(111) ɸ=0, Si(111) ɸ=90 double crystal

Monochromator Crystal Glitch Library

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

Kirkpatrick-Baez System (microfocus)

Absorption

N/A

Instrumentation

Detectors: Ionization chambers, Vortex detector, 4-element Vortex detector, CCD detector, large-area PIPS

Sample Positioning: Newport Micro sample positioner, 4-slot and 8-slot motorized sample holder for bulk spectroscopy

Sample Environment

Helium environment

Ambient temperature and pressure

Sample size: flexible, can measure ~24 x 24 mm in one image

Data Acquisition and Analysis

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

Useful links:

BL14-3 Wiki

X-ray Wiki

Beam Line Phone
650-926-5143. On-site Users: Contact the Duty Operator at 9-926-4040
Beam Line Contact

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