BL14-3b

Overview
SPEAR3

Bending Magnet, Side-Station

Beam line 14-3b, 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 SIGRAY axially symmetric mirror system is used to achieve the microfocus with a beam size of ~ 5 x 5 microns, or sub-micron sizes. BL14-3b is equipped with a 7-element Vortex silicon drift detector with Xspress3 electronics 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).

Sample Environment —

Sample size Flexible, can measure ~24 x 24 mm in one image
Other Ambient temperature and pressure.
Helium environment

Instrumentation —

Detector Ionization chambers, Vortex detector, 4-element Vortex detector, 7-element Vortex detector
Sample Positioning Newport Micro sample positioner, with 6 position sample holder

Energy —

Energy Range Resolution ΔE/E Spot Size Flux
Focused 2100-5000 eV ~1 x 10-4 5 x 5 µm 2 x 1010 ph/sec

Optics —

M0 Mirror M1 Mirror Monochromator Kirkpatrick-Baez System
Flat, bent, vertically collimating, 1 m, Si, Ni-coated, Bent, toroidal, 1.2 m, Ni-coated Water-cooled Si(111) ɸ=0, Si(111) ɸ=90 double crystal
Monochromator Crystal Glitch Library		 Microfocus

Publications

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Science Highlights

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