
Information for POWGEN Users
Announcements
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.
Useful Links for POWGEN Users
- POWGEN Experiment Guide: A–Z
- POWGEN Hutch Poster
- POWGEN Mail In Program Guide
- POWGEN Monitor Webpage
- POWGEN Rebuild paper Journal of Applied Crystallography, 52, 1189-1201 (2019)
- POWGEN Original paper Zeitschrift fur Kristallographie, 1, 127-135 (2011)
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, GSAS-II, Fullprof and Topas can be downloaded from the table below. Be sure to pick the correct cycle. Also these files are 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 will be automatically reduced into the following formats:
- Extension .gsa for GSAS and GSAS-II: Files are numbered with banks which correspond to the wavelength used. Please use the corresponding bank # from the parameter files for refinements.
- Extension .dat for fullprof: The data file names themselves tell you which bank they are and the same bank IRF file should be used.
- Extension .xye for topas: Please refer to the Topas example below.
Cycle | GSAS | GSAS-II | Fullprof | Topas | Manuals | |
---|---|---|---|---|---|---|
2022-A | GSAS-II_2022A_HR.zip | PG2022A_FullProf-.zip | 2022A_TOPAS.zip | 2022A_PDF.zip | ||
2021-B | GSAS-II_2021B_HR_v2.zip | FullProf_2021B_HR.zip | TOPAS_2021B_HR.zip | PDF_2021B.zip | ||
2021-A | GSASII_2021_HR_v2.zip | PG2021A_IRF_files.zip | TOPAS_2021A_HR.zip | PDF_2021A.zip | ||
2020A/B (May-Nov) |
GSASII_2020A-may_HR.zip | Fullprof_2020A-may_HR.zip | TOPAS_2020B.zip | PDF_2020A-may.zip | ||
2020-A (Jan-Feb) |
GSASII_2020A.zip | Fullprof_2020A_HR.zip | TOPAS_2020A.zip | PDF_2020A_.zip | ||
2019-B | GSAS.prm.zip | GSASII_2019B_HR.zip | POWGEN_PDF_2019B | |||
2019-A | GSAS.prm | Topas_and PDFGui_fit | ||||
2018-B | GSAS.prm | |||||
2017-AB | GSAS.prm | GSAS-II.instprm | Fullprof.irf | Topas.inp |
Data Analysis Tutorials
- Mantid Tutorial - Finding Structural Change from Event Data
- Fullprof refinement example
- GSAS/EXPGUI refinement example
- GSAS-II joint X-ray/neutron refinement using 11BM and POWGEN data
- TOPAS refinement example
How to access POWGEN data
Step by step instructions are also provided in the document POWGEN_Data_Access_User_Manual.
- Create an ORNL Resource account (if you don’t already have one) at the ORNL Guest Portal.
- Once you have an account, you can login to our analysis cluster by clicking on Launch Session at https://analysis.sns.gov. Alternatively, you may install the ThinLinc client on your local machine.
- Once you login, under your home directory you will see the following folder structure /data/SNS/PG3/IPTS-#/. All the run numbers will appear for your data. (Alternatively, you can find your data in /SNS/PG3/IPTS-#/shared/autoreduce.) Your automatically reduced data can be found in the /shared/autoreduce folder, along with a summary file called PG3_IPTS-xxxxx_runsummary.csv.
- Secure ftp or secure shell (SSH) will allow you to copy the data to your local drive. Select one of the programs below to download and install: FileZilla or Cyberduck.
Enter the following information to connect to the analysis computers:
Host: analysis.sns.gov
Your username and password
Port: 22