Page History

...

Peak finder parameters need to be optimized!

...

Peaks in Arc region

Selection parameters

Selection of peaks and events is defined in few stages, as listed below.

...

So far original Selection 1 looks optimal.

...

Peaks in "Whiskers" region

Parameters

Set in psana.cfg file peak selection parameters pretty much the same as in Arc region

...

Peak radius equal to 3 or 5 pixel with low and high thresholds 10 and 150ADU, respectively, work fine.
More than 90% events have more than 2 peaks in each side of "whiskers" region. Constrains on number of peaks >1 in each region should be used to select good single-hit events.
Constrain on phi_std<0.5 or phi_ptp<1 can be used to select good single-hit events.
Average azimuth angle can be used as a measure of event orientation.

Peaks in Equatorial region

Peak-finder parameters

Code Block

[ImgAlgos.NDArrDropletFinder:Equ]
source         = DetInfo(CxiDs2.0:Cspad.0)
key            = nda_clb
key_droplets   = nda_droplets_equ
key_smeared    = nda_sme_equ
threshold_low  = 10
threshold_high = 150
sigma          = 0
smear_radius   = 3
peak_radius    = 3
low_value      = 0.
mask           = work/roi_mask_nda_equ.txt
masked_value   = 0
windows =  0 0 185 0 388 \
           1 0 185 0 388 \ 
           3 0 185 0 388 \ 
           8 0 185 0 388 \
           9 0 185 0 388 \
          11 0 185 0 388 \
          16 0 185 0 388 \
          17 0 185 0 388 \
          19 0 185 0 388 \
          24 0 185 0 388 \
          25 0 185 0 388 \
          27 0 185 0 388
fname_prefix = 
print_bits   = 3