Per-pixel gains from flat field measurement
| Date | Detector | Metrology | Gain mode | Photon source | Photon energy (keV) | Occupancy (photons/pixel) | Per-pixel histogram fit HDF5 | Gain HDF5 |
|---|---|---|---|---|---|---|---|---|
| 2016-02-16 | DsaCsPad | high | Iron K-alpha (6.4keV) | 7.2 | 0.015 | /reg/d/psdm/cxi/cxi01516/calib/CsPad::CalibV1/ CxiDs2.0:Cspad.0/pixel_gain/run16_DsaCsPad_flat_orig.h5 | 0-end.data | |
Note: CsPad has high and log gain modes. A factor of 7 is used to recalibrate the high gain to low gain, e.g. 28 ADU at high gain results in 4 ADU at low gain.
Calculation note: At 8keV, we expect around 30 ADUs per photon in high gain mode. At 6.4keV, we are seeing around 23 ADU per photon. currentADU/currentEnergy*8keV=23/6.4*8=28.75 ADU per photon which is close to 30 ADUs.
K-alpha table for Iron:
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