Beamline description
The HPCAT 16-BM-B beamline is dedicated to white beam x-ray diffraction and radiography research of materials under high pressure.
With the APS bending magnet white x-rays (5-100 keV), the multi-angle energy dispersive x-ray diffraction (EDXD) technique is extensively utilized to obtain structure factors up to Q=around 20 Å-1. A Paris-Edinburgh Cell (PEC) (250 ton capability) is equipped for samples requiring a large scattering volume, especially for studies of high-temperature melt and amorphous structure. The range of pressure and temperature is up to 7 GPa and 2300K. The PEC setup includes a white beam radiography system, which allows the structure measurement with EDXD to be combined with radiographic volumetry, ultrasonic sound velocity measurement and/or falling sphere viscosity measurement.
Summary of 16-BM-B features
Feature |
Description |
|---|---|
Source |
Bending magnet |
Monochromator |
N/A, white beam |
Energy range |
10-120 keV for parallel beam; 10-65 keV for condensed or focused beam |
Beam size & focusing optics |
50 μm x 50 μm to 2 mm x 2 mm for parallel beam (slit-limited), 20 μm (H) FWHM x 300 μm (V) with 1 m Pt-coated Si KB condenser mirror, 10 x 10 μm FWHM with 200 mm Pt-coated Si KB mirror |
Established techniques |
Multi-Angle Energy Dispersive X-ray Diffraction, White Beam Radiography, Ultrasonic elastic wave velocity measurement, Falling sphere liquid viscosity measurement |
Detectors |
Ge Solid State Detector, CCD camera (Prosilica GC1380H), High-speed camera (Photron FASTCAM SA3) |
Support equipment |
Paris-Edinburgh type large volume press with resistive heating capacity (PE anvils, boron-epoxy gaskets, cylindrical graphite heater, 10V-265A power supplier; temperature and pressure range up to 2500 K under and 7 GPa) |