Experimental Setups on I18

• I18 beamline is microfocus beamline setup to do mapping and spacial resolution through XRF, XRD and XAS, or combination of the techniques with on line processing of data. This encompasses bulk and mapping of samples, tomography and ReflEXAFS, mounting the Si detectors vertically with theta tilt stage. 
• 3D XAS/XRF using a focussing optic on the detector to define a narrow sampling volume from the incident x-rays and outgoing fluorescence signal. This confocal arrangement enables slice, volume and depth dependant XRF/XANES studies of thick samples and solid particles. Spatial resolution in the beam direction ranges from 10-15microns depending on energy.
• Also liquid flow setups are such as microfludic cells allowing mixing or open jet flow chamber.
• Laser interlock sytem is also installed in I18 allowing pump probe TR-XAS using Diamond PORTO laser.

Timing information: A typical EXAFS scan takes 20 minutes or so with a 3 micron or so sized beam. Mapping at higher energies can  be done at around 10 points per second using rastering or even faster for concentrated samples, 1 pt per second in step by step mode. For low PPM (single figure) samples more time per point is required , typically 1-2 seconds.

Below are images of typical and specialist samples setups that have been used on I18. If any more info or requests of use are needed, please email beamline scientists. 3D piniter is also availble for more custom setups.

Typical mounting options for samples

Common mounting options for samples to be attached to the stages and presented to the beam. There is also a 3D printer allowing for more customised setups.

About 3 mm of sample remains ice free

This low-vibration cryostat can be used either with liquid helium or liquid nitrogen. The sample chamber is in vacuum. We recommend mounting of thin sections on sapphire discs which, once on the beamline, can be mounted on clip-on aluminium discs. There are several restrictions in the diameter of the sections that can be mounted (apprx 15 mm) and in the area that is available for x-ray imaging due to the finger that holds the aluminium disc in place. Please get in touch with the beamline for more information.

Open jet flow cell in closed chamber, shown here with pump detached.

Flow cell on in the beam line

Microfluidic flow cell

Smooth flow pump up to to 85 ml per minute flow speed

Smooth diaphram pump for smooth liquid jet. Other pumps may be available upon request such as syringe and peristaltic pumps.

Mount for capillaries, pins or pips. Mount consists of Pico motors for tomography alignment

Tomography collection by XRD, flourscence and transmission available with complete 360 degree rotation.