POWGEN User Information

Become a POWGEN User

POWGEN Experiment Guide: A – Z (Word, PDF)

Shipping Addresses for Samples

Non-activated samples coming to SNS:

Attention: Special requirements (like freezer)
To: Neutron Sciences User Sample IPTS # XXXX, Beam line 11A
Oak Ridge National Laboratory / SNS Site
Chestnut Ridge, Bldg 8920
Oak Ridge, TN 37830

Activated samples (these will also be brought to SNS but must go through check-in procedures at another on-site location):

Attention: Special requirements (like freezer)
To:  Neutron Sciences User Sample IPTS # XXXX, Beam line 11A
Oak Ridge National Laboratory
Bethel Valley Road, Bldg 7001
Oak Ridge, TN 37830

Replace the XXXX with your IPTS (Integrated Proposal Tracking System) number.

Data Reduction and Analysis by Run Cycle

Cycle
GSAS
refinements
Fullprof
refinements
Chopper settings
Manuals
2012-A

Data acquisition

Data reduction

2011-B

Data acquisition

Data reduction

2011-A

Data acquisition

Data reduction
2010-B
2010-A
         

Setting up a 2-bank refinement using GSAS or Fullprof

Fullprof Two-Bank Example

Brian Toby's EXPGUI: Easy to start a new refinement

Your Experiment Data

The Neutron Science Portal has information about how experiment data can be accessed and other services that are provided by NScD.

How to access POWGEN data

  • You will need an XCAMS account to access data collected at the instrument. If you have submitted a proposal you already have an account.  Any team member who needs to access data will also need an XCAMS account.  https://xcams.ornl.gov/xcams/regStep1.shtml
  • Next you will have to request the resources for the beam line.  Pick SNS user (on- and off-site) and POWGEN.  https://neutronsr.us/accounts/request.html
  • The previous two steps will get you access to our portal and analysis computer.  However, if you want to look at the data on your personal computer, the easiest way to make it happen is installing nxclient.  Instructions for setting up nxclient follows:
    • Run NX machine wizard with the following link: http://analysis.sns.gov/.
    • Click the LAUNCH button that appears in the applet. This will fire up an NX session to a cluster node. If you disconnect your NX session you will end up on the same node the next time you connect. No keys need to be installed, which is an improvement over the previous situation.
  • Once you log in under your home directory you will see the following folder structure: /data/SNS/PG3/IPTS-XXXX/.  All the run numbers will appear for your data.  Data are automatically reduced to gsas and fullprof files using the default parameters.  Those data can be found in the shared/autoreduce folder.  You can of course reduce data with other binning values using mantidplot.
  • Secure ftp or secure shell will allow you to get the data onto your local drive.  One such program can be downloaded from http://filezilla-project.org/download.php?type=client.
  • Parameter files for GSAS and IRF files for fullprof can be downloaded from the instrument web site http://neutrons.ornl.gov/powgen/users.shtml.  Be sure to pick the correct cycle.
  • To get a summary of runs, open a terminal window in the analysis computer.  Type

nxsummarytable –i PG3 run#-run# > table.txt

This will create a csv file with the summary called table.txt.

Help information is available.