Balder beamline performance
(updated 2024-08-23)
| Technique | Primary: XAS (XANES/EXAFS), XES Secondary: XRD, XRF |
| Beam size | Focused H 50 x V 50 µm2 (Si111), (Si311) Slits close to sample to reach smaller spot size Defocused vertical 2 mm, horizontal 500 µm |
| Energy range | 4 - 40 keV (XAS) 6 -22 keV (XES) |
| Time scales | Step scan 30 min/EXAFS Fly scan 1 sec/EXAFS |
| Sample related | Translations at ambient conditions for transmission and fluorescence, 15 K Cryostat, several sample cells available |
Sample station measurements
The X-ray beam path is 80 mm above the surface of the experimental table. The sample manipulations of the standard sample holders are made with stage above the secured sample (see picture). In other words the sample is “hanging” into the beam. A small microscope is viewing the sample positioned in the beam path.
Sample holders
All the multi-sample holding plates fit to the translation stages used at ambient conditions. The smaller size (22 x 75 mm2) and interface also fit in the cryostat (and be compatible with robotic sample loading at a later stage).
Special “clamped” holders for the cryostat are available of two sample sizes (4 x 5 mm widows, or 2 x 13 mm windows). The clamps are made of peak and attached with peak screw to back and front fixating the kapton windows in place. Can be used for solids or liquids.
If users want to design their own holders, please use the same interface (2x ∅5.6 mm holes and the 3.4 mm slot, up to 2.5 mm thickness). Plates are otherwise available at the beamline in acrylic glass (thickness 1.5 mm) or aluminum. Drawings are available upon request.
Sample plates
Size and interface
Hexapod
A high-precision hexapod is available for flexible sample orientations during measurements. In-house and personalized sample cells can be attached to the platform using the following baseplate dimensions.
Hexapod baseplate
SmarAct stage
With a high-precision SmarAct translation stage larger sample movements up to 100mm can be accommodated.
Capillaries
Thin-walled glass and quartz capillary tubes of different sizes may be available for your experiment. Please contact beamline staff for availability.