ID24 - Energy dispersive X-ray absorption spectroscopy beamline

   
Contact
Tel: +33(0)47688 +ext

Sakura PASCARELLI Scientist responsible

2147

Giovanni AGOSTINI
Scientist in charge of chemistry and catalysis
0438881914
Innokenty KANTOR
Scientist in charge of extreme conditions
0438881929
Olivier MATHON
BeamLine Operation Manager
2561

ID24 Beamline

2751-2752

Synopsis

ID24 is an intense source of linearly polarized X-rays principally used to probe the electronic, magnetic and local structure in a diverse range of systems with X-ray absorption spectroscopy and related techniques. The photon energy is tunable in the energy range 5 - 28 keV, covering absorption edges of elements between Titanium to Uranium.

The beamline is equipped with:

  • 4 planar undulators: two U27, one U32 and a revolving U27/U32 assembly
  • Two energy dispersive XAS spectrometers and associated experimental areas
  • Optics focusing down to 3 x 3 µm (H x V) FWHM. Horizontal spot size is energy dependent, ranging from 3 µm at 5 KeV to 200 µm at 28 KeV
  • A variety of sample environments:
    1. A double sided laser heating facility for the diamond anvil cell (P > 100GPa, T > 3000K)
    2. A combined XAS/DRIFTS spectrometer (Tmax = 800 K)
    3. A stopped flow cell for kinetic studies down to the 10 ms regime
    4. A pulsed magnetic field microcoil associated to a liquid He cryostat (H = 30 T, T = 3 K)
    5. A 0.7 T permanent magnet coupled to a liquid He cryostat for XMCD studies at high pressures (T = 100 GPa) and low temperatures (T =2 0K) in the diamond anvil cell
    6. A 1.2 T permanent magnet device for XMLD studies
    7. We can also adapt to a variety of user experimental stations.

Scientific Applications

The beamline is primarily used to investigate the electronic and local structure in crystalline, amorphous and liquid matter in a variety of thermodynamical and reaction conditions. Experiments fall into two main categories:

  • Studies of matter at extreme conditions of pressure, temperature and magnetic field
  • Time resolved studies of dynamical processes

The research on ID24 covers different scientific domains, including solid state physics, materials science, geosciences, environmental science, solution chemistry, heterogeneous and homogeneous catalysis.

Here is a list of main applications:

Chemistry

  • Heterogeoneous catalysis for the energy sector
  • In situ/operando time resolved studies of chemical and catalytic processes coupling X-ray absorption with infrared spectroscopy and mass spectrometry
  • Development of new experimental methodologies for coupling vibrational spectroscopies with transmission X-ray methods (XAFS, diffraction)
  • Development of new methods for interrogating ultra fast chemical proceses in catalysis (photocatalysis/laser heating) permitting synchronous XAFS/IR a time scales to a few tens of nanoseconds

Magnetism

  • Interplay between magnetism, local structure and electronic structure at very high magnetic fields (> 30 T)
  • Interplay between magnetism, local structure and electronic structure in compressed matter (> 100 GPa)

Matter at extreme pressures and temperatures

  • Studies of the local and electronic structure in solid and molten matter at extreme pressures and temperatures using double sided laser heating (T > 3000 K, P > 100 GPa)
  • Kinetics of chemical reactions at extreme conditions down to the millisecond timescale
  • Two dimensional mapping with micron resolution within the diamond anvil cell

Material science

  • Local structural characterization for advanced materials
  • Differential XAS studies of local atomic displacements in piezoelectricity, magnetostriction, electrostriction, etc.

X-ray Techniques Available

  • Probes of local and electronic structure:

X-ray absorption fine structure spectroscopy (XANES, EXAFS) and linear dichroism (XLD)

  • Probes of magnetism:

X-ray Magnetic Circular and Linear Dichroism (XMLD, XMCD)

Methods and Sample Environments Available

Time resolved XAFS spectroscopy

  • Asynchrone “Film mode” for kinetic studies down to the ms regime
  • Bunch-synchronized “Film mode” for kinetic studies down to the ms regime
  • Pump-probe acquisition, down to the 100 ps timescale
  • Single shot acquisition, down to the 100 ps timescale (1 single bunch)

XAFS and or XMCD studies of matter at extreme conditions

  • XAFS at high Pressure (> 100 GPa) and high Temperature (T> 3000K) using in-situ laser heated Diamond Anvil Cell
  • XAFS and/or XMCD/XMLD at High Magnetic Field (B = 30 T, T=3K)
  • XAFS and/or XMCD/XMLD at High Pressure and low temperature (P = 100 GPa, T = 20K)

XAFS studies of heterogeneous systems

  • 1D and 2D hyperspectral mapping in transmission mode. Fluorescence mode is also available for specific applications.