ID24 - Energy Dispersive X-ray Absorption Spectroscopy Beamline

Synopsis

ID24 is an energy dispersive EXAFS beamline optimized for time-resolved and extreme conditions x-ray absorption spectroscopy.
Status:  open

Disciplines

  • Earth and Planetary Sciences
  • Chemistry
  • Physics
  • Materials and Engineering

Applications

  • Solid state physics
  • Geosciences
  • Catalysis
  • Materials science
  • Environmental science
  • Cultural heritage

Techniques

  • XAS - X-ray absorption spectroscopy
  • XMCD - X-ray magnetic circular dichroism
  • XMLD - X-ray magnetic linear dichroism
  • EXAFS - extended X-ray absorption fine structure
  • FTIR - Fourier transform infrared spectroscopy/microscopy
  • X-ray linear dichroism
  • MicroXANES - micro X-ray absorption near-edge structure

Energy range

  • 5.0 - 27.0  keV

Beam size

  • Minimum (H x V) : 3.0 x 3.0  µm²
  • Maximum (H x V) : 200.0 x 200.0  µm²

Sample environments

  • Large-spot endstation:
  • --Microcoil for pulsed magnetic field (30 T, 1ms, duty cycle 10^-4)
  • --DRIFTS optics + Varian 670 (mid range) IR spectrometer for synchronous IR
  • --Rapid scan acquisition to 25msecs per spectrum; step scan IR to 10's of ns time resolution
  • --Mass spectrometry
  • Small-spot endstation:
  • --Diamond anvil cells
  • --Liquid He cryostat (20-300 K) for high pressure cell
  • --Permanent magnet (2 T closed gap, 0.7 T with high pressure cell)
  • --Microcoil for pulsed magnetic field (30 T, 1ms, duty cycle 10^-4)

Detectors

  • Hamamatsu/FRELON Camera (0.2ms readout time)
  • ULTRA Si strip detector (12 us readout time)
  • Ge XH strip detector (2 us readout time)
  • Si PIN diodes
  • Si drift diode (Vortex)

Technical details

Time-resolved XAS is available in either film mode (time resolution down to few microseconds) or pump/probe mode.

Single bunch aquisition is available for specific applications

Large-spot endstation: beam size from 10 x 100 μm to 200 x 200 μm (HxV).

Small-spot endstation: beam size from 3 x 3 μm to 10 x 100 μm (HxV).