Ticket #4499 (closed: fixed)
DetectorEfficiency needs to average over the number of detectors within each spectrum
| Reported by: | Martyn Gigg | Owned by: | Martyn Gigg |
|---|---|---|---|
| Priority: | critical | Milestone: | Release 2.0 |
| Component: | Mantid | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Tester: | Karl Palmen |
Description
The algorithm currently corrects each spectrum by an efficiency factor based on the detector geometry of each contributing pixel within the group. For instruments where the number of pixels per group is different across the instrument you see a different overall correction for some parts of the instrument vs others.
See image attached of MERLIN. The shortubes are hardware grouped at 8:1 per spectrum whereas the long tubes are 4:1. The final pattern shows the obvious error in the region around the beam.
Attachments
Change History
comment:1 Changed 9 years ago by Martyn Gigg
Refs #4499. DetectorEfficiencyCor averages by the number in a group.
This fixes a bug that shows up in MERLIN where the hardware grouping is different on some tubes.
Changeset: d8a9d87527db7e52d84d169da7fc2b5ef3ce1e79
comment:3 Changed 9 years ago by Martyn Gigg
- Status changed from accepted to verify
- Resolution set to fixed
comment:4 Changed 9 years ago by Martyn Gigg
Refs #4499. Update the test value.
Changeset: 93c79ca0e47271cf98db7253da1474ef1801b032
comment:5 Changed 9 years ago by Karl Palmen
- Status changed from verify to verifying
- Tester set to Karl Palmen
comment:6 Changed 9 years ago by Karl Palmen
- Status changed from verifying to closed
Tested using Convert To Energy interface (1st tab)
Input Files: Runs:
isis\inst$\NDXMERLIN\Instrument\data\cycle_09_4\MER06398.raw
Conversion To Energy Transfer: Incident Energy: 18 Mev
Energy Transfer Range (MeV): -18, 0.1, 18
Output Options: Filename: MER06398.spe
Then show instrument of MER06398.spe
Test showed consistently coloured columns with some variation of colour.
comment:7 Changed 9 years ago by Martyn Gigg
Refs #4499. DetectorEfficiencyCor averages by the number in a group.
This fixes a bug that shows up in MERLIN where the hardware grouping is different on some tubes.
Changeset: d8a9d87527db7e52d84d169da7fc2b5ef3ce1e79
comment:8 Changed 9 years ago by Martyn Gigg
Refs #4499. Update the test value.
Changeset: 93c79ca0e47271cf98db7253da1474ef1801b032
