User Guidance

Announcements

Please feel free to contact instrument scientists regarding your proposal.

Become a SEQUOIA User 

Please examine https://neutrons.ornl.gov/users/become for information on how to become a SEQUOIA user.

Shipping Addresses for Samples 

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

Quick Start Guides for Sample Changes and PPS

We do not often allow users to change their own samples.

Data Reduction and Analysis

SEQUOIA uses an autoreduction procedure. If your data needs to be manually reduced, please consult with your local contact.

How to access SEQUOIA data

Help information is available for those with internal access

  1. Create an ORNL Resource account (if you don’t already have one) at the ORNL Guest Portal.
    You can then login to our analysis cluster by clicking on Launch Session in https://analysis.sns.gov. Login credentials will be the same as XCAMS. You can also install ThinLinc client on your local machine. Step by step instructions are provide in the document POWGEN Experiment Guide: A-Z.
  2. Once you login under your home directory you will see the following folder structure/data/SNS/SEQ/IPTS-#/. All the run numbers will appear for your data. Data is automatically reduced .nxs and .nxspe files using the default parameters. Those data can be found in the/shared/autoreduce folder and subdirectories therof. If you fail to see the IPTS-# folder then try /SNS/SEQ/IPTS-#/shared/autoreduce. This is the real location of the file whereas the first one is a symlink.
  3. You can of course re reduce data with other binning values using mantidplot. Please consult with your local contact if you need further information
    Secure ftp or secure shell will allow you to get the data onto your local drive. Select one of the programs below to download: http://winscp.net/eng/download.php or http://cyberduck.io/
  4. Enter the following information to connect to the analysis computers:
    Host: analysis.sns.gov
    Username and password
    Port: 22

A summary file called with the file extension of .csv can be found in the /SNS/SEQ/IPTS-xxxxx/shared/autoreduce folder which is also where the data is stored (where xxxxx need to be replace by your IPTS #).