Far Infrared Spectroscopy

Overview

This beamline can provide IR light that is 100 – 1000 times brighter than standard laboratory IR sources, allowing the spectroscopic study of molecules with much higher precision and sensitivity; coupled to a Bruker IFS 125 HR with a 9-compartment-scanning arm, spectral resolution ? 0.001 cm-1 can be achieved.

The Far-IR Beamline is accepting proposals for high resolution studies in the spectral region between ~120 - 1000 cm-1. Furthermore, there are Coherent Synchrotron Radiation (CSR) shifts available for user proposals. These shifts provide very high intensity in the 10-35 cm-1. CSR is still in the testing phase and therefore performance may fluctuate.

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

  • Status

    Accepting Proposals

  • Spot size

    Diffraction limited

  • Flux (V/s/0.1%BW) @ 100 mA

    1 x 1013 @ 100 μm

  • Resolution Δ E

    ≥0.001 cm-1

  • Energy Range

    0.00062 - 0.124 eV
    (0.62 - 124 meV =
    5 - 1000 cm-1)

  • Extraction Port (H X V)

    (55 x 37) mrad2

  • Source

    Bending Magnet

Contacts

Senior Scientist - Beamline Responsible: Brant Billinghurst 306-657-3554
Support Scientist: Jianbao Zhao 306-657-3759
Senior Scientist (IR): Tim May 306-657-3552
Beamline Team Leader: Dennis Tokaryk
Beamline Team Members (PDF)
Beamline Telephone: 306-657-3606
 

Optics:

The first collecting mirror is in a specially designed dipole vacuum chamber. Point to point focusing optics transfer the IR light first through a thin diamond window that separates UHV from rough vacuum and then into the high resolution Bruker spectrometer.
 

Techniques:

  • Horizontal Microscope for High Pressure Studies Using Diamond Anvil Cells
  • Bruker IFS 125 HR, 9 compartments
    • Gas phase
      • Cells
        • 2 m cold multi-reflection (MR) cell
          (Path lengths up to 80 m, temperatures down to -80°C)
        • 0.3 m ambient MR cell
          (Path lengths up to 10 m)

Endstation(s):

  • Bruker IFS 125 HR, 9 compartments

Far-IR Endstations and Capabilities:

  • The Far-IR endstation centers around a Bruker IFS125HR Ultra-high spectral resolution (= 0.00096 cm-1)  Fourier transform spectrometer with a maximum optical path difference of 9.4 m.  The present set of optical components and detectors cover the spectral region between 10 and 12000 cm-1.
    • High resolution absorption spectroscopy of gas-phase molecules (10 - 4000 cm-1)
    • A 0.30 m room temperature multi-reflection cell yielding absorption paths ranging from 1.2 to 12 m to study stable gases that are weak absorbers or possess low-amplitude modes of vibration
    • A 2.00 m coolable (down to 200 K) multi-reflection cell for absorption paths ranging from 8 to 100 m to study stable gases that are also weak absorbers or possess low-amplitude modes of vibration
    • 1.5 meter Glow Discharge Cell (maximum path length 24m)
    • Horizontal Microscope for High Pressure Studies (10-5000 cm-1), the objectives of this microscope have a Numerical Aperture of 0.5 and have a working distance of 47 mm, allowing for space for Diamond Anvil High Pressure cells. (Please contact Brant Billinghurst for more details before requesting beamtime)
    • Attenuated total reflectance (ATR) is now available for the study of condensed phase samples.
 

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