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Gain correction factor distribution over quad-2 pixels in different runs
Amplitude spectra with (and without) corrected gain
Run 901, trans.=0.002
- Spectrum is shown for events 1,11,21,31, and 41, respectively.
- The gain correction factor is set to "0" for bad pixels . This explains the one-bin peak at "0" amplitude.are discarded from these spectra.
Spectra for all good pixels
Spectra for pixels from central region 48<iy<146 of [0-194] range (WITHOUT GAIN CORRECTION)
Spectra for pixels from two side regions iy<49 and iy>145 of [0-194] range (WITHOUT GAIN CORRECTION)
Run 902, trans.=0.005
- Spectrum is shown for events 1,11,21,31, and 41, respectively.
- The gain correction factor is set to "0" for bad pixels . This explains the one-bin peak at "0" amplitude.are discarded from these spectra.
Spectra for all good pixels
Spectra for pixels from central region 48<iy<146 of [0-194] range (WITHOUT GAIN CORRECTION)
Spectra for pixels from two side regions iy<49 and iy>145 of [0-194] range (WITHOUT GAIN CORRECTION)
Run 900, trans.=0.02
- Spectrum is shown for events 1,11,21,31, and 41, respectively.
- Fit is not applied because peaks are not distinguished
Spectra WITH gain correction:
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Spectra WITHOUT gain correction:
Spectra for pixels from central region 48<iy<146 of [0-194] range (WITHOUT GAIN CORRECTION)
Conclusion
- Gain factors have the RMS spread ~5-10% depending on high/low-gain mode and intensity of illumination.
- There is no significant improvements of the amplitude spectrum after the gain correction is applied.
- Comparison of spectra of pixels from central region and side bands shows that resolution is significantly better in central region.
- The gain correction is small comparing to the amplitude spread due to resolution, especially for side bands.
- In run 900 (with a large transmission = 0.02, nu=2) the 0-,1-,2-photon peaks are not resolved even for central band both WITH and WITHOUT gain correction.
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