BioXAS-Imaging

Overview

BioXAS Imaging beamline is a multi-resolution X-ray fluorescence (XRF) imaging beamline with capabilities to collect XRF imaging data in macro-, micro- and nano-modes. The former two scanning modes are accepting General Users’ proposals and the latter is currently under commissioning.

The source of the beamline is an in-vacuum undulator generating a high spectral brilliance. The beamline has an energy range of 5-21 keV with the lower energy determined by V K-edge and the upper energy by Mo K-edge measurements.

The samples can be measured in two geometries in the macro and micro modes, (1) sample at 90 degrees to the beam and two Vortex detectors (4-element ME-4 and a single element) on both sides of the beam and (2) sample at 45 degrees to the beam and a Vortex detector (either ME-4 or a single element) at 90 degrees to the beam.   

Please visit the beamline website for more details on the beamline capabilities and data collection and processing.

Please contact the beamline staff prior to submitting a proposal.

  • Status

    Accepting proposals (Macro and Micro) Commissioning (Nano)

  • Source

    In-vacuum undulator

  • Energy range

    5-21 keV

  • Beam size: Photon flux @ 100 mA

    Macro-mode
    20 µm: 0.6 x 1011ph/s
    50 µm: 3.5 x 1011 ph/s
    100 µm: 0.9 x 1012 ph/s
    150 µm: 1.4 x 1012

    Micro-mode
    6 x 5 µm (HxV): 1.5 x 1011 ph/s
    10 x 5 µm (HxV): 3.2 x 1011 ph/s

  • Resolution  ΔE/E

    Si(111): 10-4

Techniques

  • X-ray fluorescence imaging (XFI)
  • X-ray absorption spectroscopy experiments in situ

Focusing Optics

The four beam sizes in macro-mode are obtained with Pt or W apertures. In addition, a 40-micron beam spot size can also be provided with the SCATEX scatterless pinhole made of Ta. In micro-mode, KB focusing mirrors are used to focus the beam. Nano-scale focusing setup consists of the KB focusing mirrors (for beam collimation) and Fresnel zone plates (for beam focusing).

Contacts

Senior Scientist/BioXAS Sector Responsible: Gosia Korbas 306-657-3859
Associate Scientist: Viorica (Ibi) Bondici 306-657-3707

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