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SITe1 Parameters with UltraDAS

Device Identification

Chip name SITe1
Year of manufacture  1995
Serial number 1713BR03-01
First light on La Palma  May 1997
Description Image of Site chip in cryostat, converted to run with UltraDAS January 2001.

Operational Characteristics

Speed  Slow Fast 
Bias(ADU) 793 666
Gain(e/ADU) 1.9 2.78
Noise(e) 6 8
Linear to(ADU) 40K 40K
Readout time(s) 91 79
Binning        Slow speed, all factors up to  3 x 2 give <=7e noise
                   Fast speed, all factors up to 3 x 2 give <=8e noise

NB  With the old Dutch controllers the selected readout speed always changed to 'turbo'  when binning. This does not happen with the new SDSU controllers, the selected readout speed is not changed. However, the time taken to readout will of course be reduced when binning, as one would expect.

Windowing is available.

Linearity measured Jan. 2002 using this method.

Vertical CTE  0.9999999
Horizontal CTE  0.9999997

Physical Characteristics

X Pixel size 24 microns
Y Pixel size 24 microns
X size in pixels of digitised area 2088
Y size in pixels of digitised area 2120
X size of useful imaging area 2048
Y size of useful imaging area 2048
X start of useful imaging area  23
Ystart of useful imaging area 1
LN2 capacity of cryostat 2.5 litres
Cryostat window thickness 4 mm
Distance from window to CCD 14.8 mm


Operational Parameters

Flooding type none
Operating temperature  168K
Preferred amplifier  C (D is possible backup)
Anti-blooming available no


Measured Characteristics

Dark current 3 e/hour
Chip flatness 160 micron convex bow
Bright columns    584,1046
Dark columns     585,1047
Trap locations (x,y coords) 858,835,1258,1113,491,634

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Last modified: 21 November 2010