Overview
Beamline 6-2c is a wiggler end-station dedicated to hard x-ray transmission microscopy. The full-field transmission X-ray microscope (TXM) is capable of 2D and 3D imaging (radiography and tomography), as well as spectroscopic imaging. Scientific areas include batteries, catalysts, fuel cells, among other nanoscale chemistry, materials science, and geology applications.
The instrument resolution is ~30 nm with a ~30 micron field-of-view, depending on the photon energy. The energy range is ~5 to 13 keV, suitable for spectroscopic imaging of many transition metals in energy materials, and also for absorption contrast imaging of other materials. Elemental mapping is accomplished via acquisition of images above and below the X-ray absorption edge. Mapping of chemical states is accomplished with XANES (X-ray absorption near edge structure) imaging. Absorption contrast, elemental mapping, and chemical state mapping are possible in 2D and 3D imaging modes. Larger sample areas can be imaged in mosaic imaging mode, stitching together multiple fields-of-view.
Status —
Beamline Parameters —
| Energy Range | Resolution ΔE/E | Spot Size | Flux | Angular Acceptance | |
|---|---|---|---|---|---|
| Focused | 5000-13000 eV | ~10-4 | 0.2 x 0.4 mm | ~1013 | 1.2 mrad |
Optics —
| M0 Mirror | M1 Mirror | Monochromator |
|---|---|---|
| Bent flat single-crystal silicon Rh-coated 10-17 keV cutoff vertically collimating | Bent cylindrical single-crystal silicon Rh-coated, standard focus | Double crystal Si(111), psi=90, liquid-nitrogen cooled |
Source —
Instrumentation —
| Detectors | Pco Edge 4.2 bi sCMOS, single element vortex detector, ionization chambers for incident beam monitoring |
|---|---|
| Microscope optics | Elliptical capillary condenser, zone plate with 30 nm outermost zone width |
| Other | Shutter and variable filters to alleviate beam damage |
Sample Environment —
| Standard | Kapton heaters for flat samples |
|---|---|
| Sample heating up to 400˚ C | |
| Electrochemical cycling (contact staff for pouch cell specs) | |
| Custom user setups | Consult with beamline staff on design, mass spectrometer (available upon request), gas cabinet for hazard gas flow handling |
Absorption —
| 127 μm Be |
|---|
Publications
Publications
Highlights
Science Highlights
We are in the process of porting over science highlights from our previous system. You can access new highlights and a portion or our catalog here.
For science highlights dated before 2021 visit this site. Use the filters to narrow down your search by year and beam line.