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This note describes raw intensity correction algorithms in the method Detector.calib and their variation on detector type.
LCLS (1) Detector Interface
det.calib algorithms
Generic form of this method is
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| Detector type | pedestal subtraction | common mode correction | gain | mask | formula | comments |
|---|---|---|---|---|---|---|
| LCLS (1) | ||||||
| CSPAD | + | default cmpars = (1, 25, 25, 100) cmpars = 0 or cmpars[0] = 0 | *gainmask det.set_gain_mask_factor(gfactor=6.85) | + | gain map extracted from detector configuration data and applied with gfactor gainmask is applied before regular gain factor | |
| CSPAD2x2 | + | shape=(185, 388, 2) → common_mode shape=(2, 185, 388) → back to (185, 388, 2) default cmpars = (1,25,25,100) | + | + | shape is converted before common mode correction in order to apply regular CSPAD algorithm then it is converted back to daq shape. | |
| epix100a | + | default cmpars =(4,6,30,30) | + | + | ||
| pnCCD | + | default cmpars =(3,350,350,128) or alg #8 (8,5,500) | + | + | ||
| Andor3d | + | default cmpars =(2,10,10,cols) | + | + | ||
| Princeton | + | default cmpars =(1,50,50,100,1,size,1) | + | + | ||
| Camera | + | other Cameras default cmpars = (0,0,0,0), cmpars = 0 or cmpars[0] = 0 - OFF | + | + | ||
| epix10ka | + |
| pixel_gain constants are used and per event depending on gain range | + | (common_mode(raw - peds)/gain * mask | UtilsEpix10ka.calib_epix10ka_any(det, evt, cmpars=None, **kwa) offsets are already accounted at deployment of pedestals in calib/.../pedestals |
| Jungfrau | + | applied for pixels in high gain mode only in combination with mask
| pixel_gain and pixel_offset are used and per event depend on gain range | + | (common_mode(raw - peds - offset))/gain * mask | UtilsJungfrau.calib_jungfrau(det, evt, cmpars=(7,3,200,10), **kwa) |
LCLS-II Detector Interface
| Code Block | ||
|---|---|---|
| ||
from psana import DataSource
ds = DataSource(exp=<experiment>,run=<run-number>)
orun = next(ds.runs())
det = orun.Detector(<detector-name>)
for nevt,evt in enumerate(orun.events()):
print('det.raw.raw(evt).shape :', det.raw.raw(evt).shape)
print('det.raw.calib(evt).shape:', det.raw.calib(evt).shape)
print('det.raw.image(evt).shape:', det.raw.image(evt).shape) |
Generic form of this method is
arr = det.raw.calib(evt, **kwa)
Regular formula
common_mode(raw-peds)/gain
Mask
Mask is derived and applied separately as explained in Area detector mask examples or Detector interfase in LCLS-II.
| Detector type | pedestal subtraction | common mode correction | gain | mask | formula | comments |
|---|---|---|---|---|---|---|
| LCLS-II | ||||||
| epix10ka | + | cmpars=(7,2,100,10) | + | - | calib_epix10ka_any(det.raw, evt, cmpars=None, **kwa) see UtilsEpix10ka | |
| epix100a | + | cmpars = (7,7,100,10) | + | - | calib_epix100(det.raw, evt, cmpars=None, **kwa) | |
| opal | + | - | + | - | (raw-peds)/gain | opal_base |
| piranha4 | + | - | + | - | (raw-peds)/gain | piranha4_base |
References
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