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ao:cic_analysis [2018/07/06 13:37]
127.0.0.1 external edit 		ao:cic_analysis [2018/07/07 08:56] (current)
jones
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 +====== CIC Analysis ======
  Clock Induced Charge Analysis\\ \\  This recipe from Mike Ireland:\\ \\  1) Take at least 10 frames with chosen settings, which is a high gain\\  mode and with shutter closed\\  (definitely above a gain of 200 electrons, preferably 500 electrons)\\  2) Compute a median dark and subtract it.\\  3) Compute a robust standard deviation, e.g.\\  stdev = 1.48*sqrt(median(data^2))\\  4) Compute the number of elements above a threshold e.g.\\  threshold = 3.5*sigma\\  length(where(data > threshold))/length(data)\\ \\  5) Finally, there is a correction you could do which is to divide\\  the final number by:\\  exp(-threshold / em_gain_in_dn)\\ \\  [but to do step 5, you need the EM gain. As long as gain is high, this\\  correction is small]\\ \\  Clock Induced Charge Analysis\\ \\  This recipe from Mike Ireland:\\ \\  1) Take at least 10 frames with chosen settings, which is a high gain\\  mode and with shutter closed\\  (definitely above a gain of 200 electrons, preferably 500 electrons)\\  2) Compute a median dark and subtract it.\\  3) Compute a robust standard deviation, e.g.\\  stdev = 1.48*sqrt(median(data^2))\\  4) Compute the number of elements above a threshold e.g.\\  threshold = 3.5*sigma\\  length(where(data > threshold))/length(data)\\ \\  5) Finally, there is a correction you could do which is to divide\\  the final number by:\\  exp(-threshold / em_gain_in_dn)\\ \\  [but to do step 5, you need the EM gain. As long as gain is high, this\\  correction is small]\\ \\
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- 2012-09-26:\\ \\  CIC tests on the six cameras delivered 2012-09-24:\\ \\ [[/file/view/201209xx_camera_shipment/368087484/201209xx_camera_shipment|{{http://www.wikispaces.com/i/mime/32/text/plain.png?32x32|201209xx_camera_shipment}}]][[/file/view/201209xx_camera_shipment/368087484/201209xx_camera_shipment|201209xx_camera_shipment]]\\  + 2012-09-26:\\ \\  CIC tests on the six cameras delivered 2012-09-24:\\ \\ [[ao:201209xx_camera_shipment|201209xx_camera_shipment]]\\ 
- +
-  * [[/file/detail/201209xx_camera_shipment|Details]] +
-  * [[/file/view/201209xx_camera_shipment/368087484/201209xx_camera_shipment|Download]] +
-  * 1 KB+
ao/cic_analysis.1530898653.txt.gz · Last modified: 2018/07/06 13:37 by 127.0.0.1

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