BL14-3a

Overview
SPEAR3

X-ray Absorption Spectroscopy Bending Magnet, Side-Station

Beam line 14-3a, located on the upstream table of the hutch of the BL14-3 bending magnet side station, is dedicated to bulk x-ray absorption spectroscopy of biological, materials, and geological samples in the tender x-ray photon energy range 2.1-5.0 keV. BL14-3 is the only beam line at SSRL capable of obtaining spectroscopy data at the phosphorous K edge. In this configuration the beam is unfocused over a size of 1 mm x 6 mm to allow for high energy-resolution measurements on homogenous samples. BL14-3 is equipped with ionization chambers, as well as a Vortex silicon drift detector and PIPS detector for fluorescence XAS. Samples are placed inside a helium environment. A motorized sample holder stage allows sequential automated (via queueing) measurement on multiple samples without sample changeover delays.

Sample Environment —

Sample size Flexible, typically 5 x 15 mm solids and 2 mM or higher solutions.
Other Ambient temperature and pressure. Cryo Industries, Cryocool-LHe, LHe cryostream available for cooling (20 - 200 K)
Helium environment

Instrumentation —

Detector Ionization chambers, Vortex detector, 4-element Vortex detector, large-area PIPS
Sample Positioning 4-slot and 8-slot motorized sample holder for bulk spectroscopy. Automatic scan queueing available for multiple samples and/or spots

Energy —

Energy Range Resolution ΔE/E Spot Size Flux
Focused 2100-5000 eV ~1 x 10-4 1 x 3 mm 2 x 1010 ph/sec

Optics —

M0 Mirror M1 Mirror Monochromator
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

Publications

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Science Highlights

Beam Line 14-1 Science Highlights

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