Introduction to I12 – JEEP

Beamline I12-JEEP (Joint Engineering, Environmental, and Processing) is a high energy X-ray beamline for imaging, diffraction and scattering, which operates at energies of 53-150 keV.

I12 was built to be suitable for experiments, which utilize:

• high-energy X-rays
• time-resolved in situ measurements
• monochromatic or polychromatic (“white beam”) X-rays
• imaging and diffraction techniques, including their combination during one experiment
• beam size from 0.05 mm × 0.05 mm up to 100 mm × 30 mm (H × V), both monochromatic and polychromatic
• complex sample environments provided by users (users are welcome to bring their own sample environment for diffraction and imaging experiments)

At I12 you can perform a range of experimental techniques:

• Static and time-resolved radiography and tomography
• Static and time-resolved powder diffraction using monochromatic radiation
• Time-resolved powder diffraction using energy-dispersive radiation
• Diffuse scattering on crystalline (single-crystal diffuse scattering) or amorphous materials (pair-distribution function analysis "PDF”)
• High energy X-ray small angle scattering

General: All techniques use high-energy X-rays able to penetrate large samples or sample environments. Therefore sample preparation is simple and processes can often be studied under real-world conditions. For very high resolution in real space (< 2 µm)  or in reciprocal space, lower X-ray energy techniques on other beamlines are more suitable.

I12 can accommodate complex sample environments (chemical, mechanical and electrical processing equipment, engineering machinery, all kinds of experimental apparatuses), which the users can bring and install for their beamtime. We accommodate small and medium sized sample environments in EH1 and large ones in EH2.

The beamline has two in-line experimental hutches:

Experimental Hutch One (EH1) is inside the Diamond Experimental Hall. It provides a high intensity X-ray beam at a distance of around 50m from the x-ray source. EH1 is configured for experiments with small- and medium-sized samples and sample environments. A core feature is a sample table which can be configured to suit different sizes of experimental equipment and can be used for all available experimental techniques.

Experimental Hutch Two (EH2) is in an external building outside the Experimental Hall, which is in-line with EH1. It provides a space for large or complex experiments in physics, material science, geology, engineering and processing. Equipment setup and preparation for an experiment in EH2 can be carried out without interrupting ongoing experiments in EH1, allowing longer setup times of user-provided equipment.

Recent Upgrades at Beamline I12:

• NNUF furnace
• INSTRON 100 kN uniaxial mechanical test rig for in situ diffraction and imaging experiments and for ex situ sample preparation before measurements
• Linkam high-temperature furnace for in situ diffraction measurements
• Powder Cabinet in the laboratory for handling powders

Reference:

M. Drakopoulos, T. Connolley, C. Reinhard, R. Atwood, O. Magdysyuk et al., Journal of Synchrotron Radiation. 2015, 22, 828-838 (link).