Polaris
Experiments on Polaris investigate atomic positions in crystalline materials using powder samples. Its large detector coverage allows for high count rates, which can enable data collection within a few minutes or from very small sample quantities (50 - 100 mg).
Instrument scientists
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Technical information
| Moderator | H2O at 316K |
| Incident wavelength range | ~0.15 to ~5.4 Å (peak flux at ~0.9 Å) |
| Incident flight path | 14.0 m |
| Incident beam dimensions (max) | 40 mm (h) x 15 mm (w) |
| Detector solid angle | 5.67 ster (coverage from 6.7° - 167° 2θ) |
| Typical sample volume | 0.5 - 1 cm3 (but can be as small as ~10 mm3) |
Related resources
Sample environment
Typical sample environment equipment:
- Room temperature sample changer (20 positions)
- Furnace (room temperature to 1000°C)
- Pulse Tube CCR (5 K to 300 K)
- Helium flow cryostat (2 K to 300 K)
Accepts dilution insert to reach ~0.1 K using copper IVC and sample can.
Recent publications
Instrument reference
All publications and datasets based on experiments using Polaris should cite that the data is collected by DOI: 10.5286/isis.instrument.3713. Experiment DOIs follow the format 10.5286/ISIS.E.RBXXXXXXX, where XXXXXXX is the 7-digit experiment (RB) number and these can be viewed via the Data Gateway.