Content

Generated samples

1. phi=-3.5, beta=0, omega=(0,360,1)
2. phi=-3.5, beta=10, omega=(0,360,1)
3. phi=-3.5, beta=20, omega=(0,360,1)
4. phi=-3.5, beta=30, omega=(0,360,1)

1. phi=3.5, beta=180, omega=(0,360,1)
2. phi=3.5, beta=170, omega=(0,360,1)
3. phi=3.5, beta=160, omega=(0,360,1)
4. phi=3.5, beta=150, omega=(0,360,1)

Fitting

beta=0

beta=-10

beta=-20

beta=-30

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°).