Balder User Information
Balder beamline attributes
| Techniques | XAS, XES |
| Beam Size | defocused V ~0.1-2 x H ~ 2-9 mm2, focused 100 x 100 µm2 |
| Energy Range | 2.4 - 40 keV |
| Time Scales | ms - s |
| Samples | covering K-edges from S to La and L-edges from Nb in almost any sample in any form under many condition see text on the main page |
Current beamline performance (updated 2022-02-03)
| Technique | XAS (XANES/EXAFS), secondary technique XRD |
| 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 | 5 - 40 keV |
| Time scales | Step scan 30 min/EXAFS Fly scan 30 sec/EXAFS |
| Sample related | Translations at ambient conditions for transmission and fluorescence, 10 K Cryostat, several sample cells available |
Information for the user call (2022-02-03):
- Balder beamline is providing transmission and fluorescence XANES/EXAFS in the energy range from 5 – 40 keV (DCM Si111, Si311).
- Scanning can be made in fly scan mode (~30 sec/EXAFS) or in step scan mode (~30 min/EXAFS) for both transmission and fluorescence detection. XANES spectra will be correspondingly faster.
- Sample translations at ambient and cryo conditions.
- Closed cycle cryostat down to ~10 K, sample in He exchange gas.
- Limited gas experiments possible, please contact staff for feasibility.
- Fluorescent detection XAS with the energy dispersive 7 element SDD is available up to 20 keV and with the 7 element Ge detector up to 40 keV. A large PIPS diode is available for TFY.
- XES is in ongoing expert user commissioning. (not in present call)
- XRD is now available for sequentially combined XAS-XRD measurements with stationary detector and raw data support.
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). 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 or aluminum. Drawings are available upon request.