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DiamondLightSource / jungfrau-commissioning

Scripts and code for commissioning the Jungfrau detectors at Diamond
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Assessment of gains #1

Open graeme-winter opened 1 year ago

graeme-winter commented 1 year ago

Look at flat field data, assess how realistic the gains we are using for corrections are

graeme-winter commented 1 year ago

Possibly good example data?

2023-06-22-10-56-30_glass_100pcT/glass_100pcT_[0,1]_0.h5
graeme-winter commented 1 year ago

These data have 2.5 / 4e6 photons per image, corrected, which across 500,000 ish pixels gives you about 5 / 8 counts / pixel / image which is probably just enough to assess the gain

image

graeme-winter commented 1 year ago

I do not know what that oscillation is about, it feels larger than shot noise should be 🤔

JMatheson128 commented 1 year ago

Anecdotal evidence: if you view a pedestal file as a movie you can see the occasional frame (or area within a frame) which looks brighter. Some sort of common mode noise across many pixels ? I wonder if that's related to these oscillations ? WRT the calibration, in high gain the fluorescence data gives photopeaks in the right place (Mo/Cu/Zr). So at least on average and at least for high gain, the calibration is good.