FORS 1 - CCD System

Linearity

	Speed ( kps )	Non-Linearity Peak - Peak ( % )	Range ( ADU )	Saturation level ( e^- )
Port A ( left bottom )	50 ( high gain )	+ 0.16 / - 0.21	1900 - 59000	86 K
Port A ( left bottom )	50 ( low gain )	+ 0.21 / - 0.18	900 - 57000	164 K
Port B ( right bottom )	50 ( low gain )	+ 0.17 / - 0.18	1000 - 60000	187 K
Port C ( left top )	50 ( low gain )	+ 0.17 / - 0.18	1000 - 60000	187 K
Port D ( right top )	50 ( low gain )	+ 0.18 / - 0.18	1000 - 60000	187 K

Dark Current

Mean dark current 2.0 e^-/pixel/hour @ - 120 °C.

Cosmic Ray Hit Event

Cosmic hit event rate :

78 events/min/CCD;
3.4 events/min/cm².

Charge Transfer Efficiency

Vertical CTE to port A/B : 0.999999 ( six 9s ) ;
horizontal CTE to port A : 0.999999 ( six 9s ).

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Last update: Mar 15, 2004
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