Information for POWGEN Users


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 

Shipping Addresses for Samples 

Please visit the ORNL User Facilities Sample Handling and Shipping page.


Quick Start Guides for Sample Changes and 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 will be automatically reduced into the following formats:

  • Extension .gsa for 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 and Jana: The data file names themselves tell you which bank they are and the same bank IRF file should be used for FullProf.
  • Extension .xye for TOPAS:  Please refer to the TOPAS example below.
Dates Run Numbers      GSAS-II FullProf Jana TOPAS PDF
  June - August
55221 -  GSAS-II_2023_HR FullProf_2023 Jana_2023 TOPAS_2023 PDF_2023
  Nov - Feb 2023
53957 - 55220 GSAS-II_2022B_HR FullProf_2022B Jana_2022B TOPAS_2022B  
  January - August
51648 - 53956 GSAS-II_2022A_HR FullProf_2022A Jana_2022A_HR TOPAS_2022A PDF_2022A
  July - October
50286 - 51647 GSAS-II_2021B_HR_v2 FullProf_2021B_HR   TOPAS_2021B_HR PDF_2021B
  February - June
48322 - 50285 GSASII_2021_HR_v2 FullProf_2021A   TOPAS_2021A_HR PDF_2021A
  May - November
46137 - 48321 GSASII_2020A-may_HR FullProf_2020A-may_HR   TOPAS_2020B PDF_2020A-may
  January - February
45453 - 46136 GSASII_2020A FullProf_2020A_HR   TOPAS_2020A PDF_2020A


Data Analysis Tutorials


How to access POWGEN data

Step by step instructions are also provided in the document POWGEN_Data_Access_User_Manual.

  1. Create an ORNL Resource account (if you don’t already have one) at the ORNL Guest Portal
  2. Once you have an account, you can login to our analysis cluster by clicking on Launch Session at Alternatively, you may install the ThinLinc client on your local machine.
  3. 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.
  4. 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:
              Your username and password
              Port: 22