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beta=150
beta=160
beta=170
beta=180
Indexing
beta=0
beta=10
beta=20
beta=30
beta=150
beta=160
beta=170
beta=180
Indexing with wrong(beta=0) look up-table
Indexing with right (beta=180°) look-up table
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Indexing with symmetrical (beta=0 and 180°) look-up table
Summary
- Simulated events can be indexed with small ~1% rate of mismatch.
- NOTE: in processing of simulated events
- detector background is not accounted
- peaks were selected with very lower thresholds
- other peak parameters were set "reasonably well" and were not tuned.
- due to very broad peaks in MC w/o noise and not tuned peak selection parameters, sometimes peak position is reconstructed with offset that makes bad fit quality and may cause offset of phi and and beta.
- It is shown that for crystal with 180° symmetry in omega look-up table should be generated in the range of 0-180° for direct and mirror-reflected (swapped a↔b, or gamma in the unit cell or beta=180°).
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