BL9-3

Overview

Beam line 9-3 is a high flux focused wiggler side-station optimized for x-ray absorption spectroscopy (XANES and EXAFS) in the 5.5–30 keV range, for x-ray absorption spectroscopy and EXAFS measurements primarily on dilute biological systems. A dedicated LHe cryostat allows for routine low temperature measurements. The station features an LN2-cooled double-crystal Si(220) monochromator with energy resolution up to 10-4 (ΔE/E) and small vertical entrance slits to reduce intensity glitches. Equipment includes a Canberra 100-element Ge detector for dilute samples, a Mirion 24-element Ge detector, a passivated implanted planar silicon (PIPS) semiconductor detector for fluorescence detection, ionization chambers for transmission data, and a LHe cryostat for maintaining samples at ~10 K (4-200 K with LHe dewar).

 

Source —

20-pole, 2-Tesla wiggler side station, 0.8 mrad acceptance

Status —

Operational

Beamline Parameters —

Energy Range Resolution ΔE/E Spot Size Flux
Focused 5500-30000 eV 1 x 10-4 1 x 4 mm2 ~2 x 1012 ph/sec

Optics —

M0 Mirror M1 Mirror Monochromator
Vertically collimating, flat, bent, 1 m, Si, Rh-coated Cylindrical, bent, 1.2 m, Zerodur, Rh-coated Si(220), ϕ = 0o & 90o, double-crystal, variable-exit geometry

Instrumentation —

Detectors Canberra 100-element germanium solid state detector. Mirion 24-element germanium solid state detector with Xspress3X electronics. Passivated implanted planar silicon (PIPS) semiconductor detector. Ionization chambers.
Ancillary Soller slits and scatter guards, sample shutter to alleviate beam damage, automatic scan queueing for multiple samples/multiple spots on samples. Oxford Helium cryostat, cooled by liquid He dewar (4-200 K). Multiple-sample holder for room temperature samples.

Sample Environment —

Standard room temp Ambient pressure
  • Single sample holder
  • 4 slot sample holder
  • 8 slot sample holder
Standard LHe cryostat Sample temperature ~10 K:
  • Single solid sample
  • 4-slot solid sample cassette
  • Single solution sample
  • 5-slot solution sample cassette
Non-standard setups Communicate with beam line staff well in advance to ensure your set-up will work.

Absorption —

768 microns Be, 205 microns C
Data Acquisition and Analysis
  • EXAFSPAK
  • SIXPack
  • Athena


SPEAR3

Publications

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Science Highlights

We are in the process of porting over science highlights from our previous system. You can access new highlights and a portion or our catalog here. 

For science highlights dated before 2021 visit this site. Use the filters to narrow down your search by year and beam line.