FORS 2 Upgrade - CCD System

Linearity (TDI method)

Linearity of CCD "Belenos"

RMS non linearity [%] = 0.231496
Peak to peak non linearity [%] = 0.780178

Linearity of CCD "Belenos"

Linearity of CCD "Thor"

RMS non linearity [%] = 0.231496
Peak to peak non linearity [%] = 0.780178

Linearity of CCD "Thor"

Dark current

	CCD "Belenos"	CCD "Thor"
CCD temperature [°C]	- 120	- 120
Exposure time [s]	3600	3600
Dark current [e^-/hour/pixel]	0.52	1.50

Remanence effect

The remanence effect was only tested with

CCD "Belenos"

Dark exposure (1800 s) 20 s exposure (saturation 600 electrons)
20 s exposure
(saturation 600 e^-) 1800 s exposure (30 s after the saturation exposure)
1800 s exposure
(30 s after the saturation exposure)
The remanence effect is very sharp, with a 12 e^- value.

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Last update: June 22, 2004
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