Powder Diffractometer
POWGEN | BL-11A | SNS
Announcements
We are excited to announce the addition of a new sample environment for the 2025-A cycle: a vanadium-tail magnet with a temperature range of 2 K to 300 K and a maximum magnetic field of 7 T. This magnet provides clean neutron diffraction patterns without contamination from aluminum peaks.
Useful Links for POWGEN Users
- Experiment Guide: A–Z
- Hutch Poster
- ADDIE (ADvanced DIffraction Environment) general and Powgen-specific tools for neutron scattering, including simulating Powgen diffraction patterns
- Monitor Webpage
- Rebuild paper Journal of Applied Crystallography, 52, 1189-1201 (2019)
- Original paper Zeitschrift fur Kristallographie, 1, 127-135 (2011)
- User Manual for Data Acquisition
- User Manual for Data Access
- User Manual for Mantid Workbench
Shipping Addresses for Samples
Please visit the ORNL User Facilities Sample Handling and Shipping page.
Quick Start Guides for Sample Changes and Shutter Operation
- Gas-flow furnace sample change
- Vacuum furnace sample change
- Janis cryofurnace with high temperature stick (30-750 K) sample change
- Janis cryofurnace with low temperature stick (5-500 K) sample change
- Orange cryostat sample change
- PAC sample changer loading
- Removing Samples from Beamline 11a
- Shutter operation
Data Reduction and Analysis by Run Cycle
Parameter files for GSAS-II, FullProf, Jana and TOPAS can be downloaded from the table below. Be sure to pick the correct cycle. These files are also stored in the /SNS/PG3/run_cycle_11A_CAL folder in the analysis computer where cycle is year_1 or year_2 based on cycle A or B.
Data Analysis Tutorials
- Mantid Tutorial - Finding Structural Change from Event Data
- FullProf Crystal Structure and Commensurate Magnetic Order
- GSAS-II joint X-ray/neutron refinement using 11BM and POWGEN data
- GSAS-II Crystal Structure and Commensurate Magnetic Order
- TOPAS refinement example
- Mag2Pol tutorial
Synchrotron Partnership
POWGEN has a partnership with beam line 11BM at the Advanced Photon Source where users can get x-ray data if they have an approved proposal at POWGEN. This option is not available for mail in proposals.
CONNECT WITH US
Oak Ridge National Laboratory is managed by UT-Battelle LLC for the US Department of Energy