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.

Disciplines

• Physics
• Earth and Planetary Sciences
• Chemistry
• 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

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).