Variable Line Spacing Plane Grating Monochromator


Facilitating research in materials of both fundamental and applied nature, the VLS-PGM Beamline provides high resolution, low energy spectroscopic studies.

Equipped with a solid state absorption chamber, users can perform experiments requiring techniques such as X-ray absorption spectroscopy (XAS) and X-ray excited optical luminescence spectroscopy (XEOL).

Please discuss details of your proposal with the beamline scientist prior to submitting your proposal.

  • Status

    Accepting Proposals

  • Source

    185 mm planar undulator

  • Spot size (Horizontal x Vertical)

    500 μm x 500 μm

  • Resolution

    >10,000 E/ΔE

  • Energy Range

    5.5 – 250 eV

  • Wavelength

    2254 – 49.6Å

  • Flux (γ/s/0.1%BW) @ 100 mA

    2 x 1011 @ 9 - 240eV & 50 x 50 μm slits


Beamline Scientist: Lucia Zuin 306-657-3724
Support Scientist: David Wang 306-657-3852
Beamline Team Leader: T.K. Sham
Beamline Team Members (PDF)
Beamline Telephone: 306-657-3608


  • X-ray Absorption Spectroscopy (XAS)
  • X-ray Excited Optical Luminescence (XEOL)

VLS-PGM Endstations and Capabilities

  • Absorption Chamber
  • X-ray Absorption Spectroscopy (XAS): The solid state chamber is capable of measuring the Total Electron Yield and the Fluorescence Yield simultaneously. The multiple-samples loading system allows users to load up to three sample holders and exchange them in less than five minutes. A glove box coupled to the chamber allows loading samples in a controlled atmosphere. At present only room temperature experiments are possible. For light emitting materials, the photoluminescence yield can also be measured with the XEOL apparatus. Users that need to use the glove box or the XEOL apparatus are encouraged to contact the Beamline Scientist Lucia Zuin prior to any proposal submission and beamtime allocation.
  • X-ray Excited Optical Luminescence (XEOL): XEOL can be performed using an in-vacuum lens in the solid state chamber. The system is fully integrated into the beamline software, allowing optical yield XAS as well as acquisition of individual optical spectra.

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