Summer School 2021 VSANS Polarized Reduction Directions

Obtaining Data

Typically, users can get their data using FTP (from a Windows Folder by typing in to the address bar: ftp://ncnr.nist.gov/pub/ncnrdata/vsans/ ) and then navigating to
- e.g. -> 202007/27633/data (files 64954 onward),
- and -> 201911/26903/data (files 51277 to 51351).
Alternatively, for summer school we have located your data at: https://ncnr.nist.gov/summerschool/tutorials/VSANS_2021/". This also includes the older data from NG7 SANS and Colab files.

Get a Google account if you don’t already have one
Navigate to Google Drive https://drive.google.com
Click New to Upload Files / Folders:
- e.g. VSANS27633_CoFe2O4NP_Data and CoFe2O4Config_Colab.json
- this file’s name and input parameters, like path, can be changed for different experiments
Go to Colab by typing https://colab.research.google.com/
Upload the Colab notebook VSANSReductionSummerSchool.ipynb
Now run the first cell (shift + enter)
It will tell you to navigate to another link to authorize Colab to access your google drive
- go to that page, click “Allow” (at bottom) and copy the code (right box)
- and then paste it back into the box in your Colab notebook
Now run the second cell (shift + enter)
You should find your reduced data in your Google Drive (CoFe2O4VSANS_Results)
To process future experiments
- upload new data
- create and upload additional json input files to match with corresponding input and output paths
- then re-run second cell, calling the new json file in parenthesis, e.g.
```
VSANS_ReductionHighRes.main(json_config='/content/drive/MyDrive/CoFe2O4Config_Colab.json')
```

SasView 5.0.4 (the latest) https://github.com/SasView/sasview/releases.
- scroll down to the end of section 5.0.4 and click on Assets
- Choose what installation matches your computer and install
Then scroll down to the end of section 5.0.4 and click on Assets.
IGOR Pro with SANS modules: https://www.nist.gov/ncnr/data-reduction-analysis/sans-software.