scipp / esspolarization

Polarization data reduction for the European Spallation Source
https://scipp.github.io/esspolarization/
BSD 3-Clause "New" or "Revised" License
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Zoom test-data: explanations & read-out #29

Open astellhorn opened 5 months ago

astellhorn commented 5 months ago

The example polarization data from ZOOM (attached) (long 3He runs for data reduction with glassy carbon as non-magnetic sample (GC) for reference): 1) I^(DB, unpol-in, cell):

691 693 695 697

2) I^(++, +-, -+, --):
#690 692 694 696 
--> dont have these, ask Diego again (but sample data from users, so maybe not accessible)
--> maybe can use GC measurements in folder "3He_GC" for sample-measurements?
3) I^(DB, unpol-in, cell)_background:
#698 
--> for background subtraction
--> they have made an extra measurement, whereas we chose to just take the bg and some edge of the detector at certain Q
4) I^(DB, depol, cell):
#699 
5) I^(DB, no-cell)
--> missing compared to our workflow!
--> just for normalization, maybe possible to set to 1?
6) Probably related to the "unpolarized SANS" workflow:
#706 
--> "TRANS Reference of DB with GC"
--> sample transmission correction

Note: each ZOOM-file contains all 4 spin-values that we need to extract out to match to our workflow, see note above I_DB_depol_Cell.zip I_DB_unpol_in_cell_BG.zip I_DB_unpol_in_Cell.zip