Device Identification
 
 

Chip name	Marconi1
Year of manufacture	2002
Serial number	00452-11-03
First light on La Palma
Description	Experimental deep depletion low fringing CCD with 'stripes'. 750nm AR coating. On loan from manufacturer.

Operational Characteristics

 

Speed	Slow	Fast
Bias(ADU)	1760	1170
Gain(e/ADU)	1.2	2.47
Noise(e)	3	4.2
Linear to(ADU)  {also see graphs below}	63K	55K
Readout time(s)	63	42

Windowing first 50 columns are noisy.

Binning there is no increase in noise up to 4x4..

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.
 
 

Vertical CTE
Horizontal CTE

Physical Characteristics
 
 

X Pixel size	13.5 microns
Y Pixel size	13.5 microns
X size in pixels of digitised area	2148
Y size in pixels of digitised area	4700
X size of useful imaging area	2047
Y size of useful imaging area	4611
X start of useful imaging area	51
Ystart of useful imaging area	1
LN2 capacity of cryostat	2.5 litres
Cryostat window thickness	4 mm
Distance from window to CCD	11 mm measured optically
Cryostat window size	30 mm x 60 mm

Operational Parameters
 
 

Flooding type	none
Operating temperature	168K
Preferred amplifier	Left hand

Measured characteristics

'The CCD has experimental mirror sections deposited in alternating blocks of 512 rows. The QE under the mirror sections is enhanced in the red. The QE graph shows data taken in the mirror and non-mirror sections. The appearence of these mirrors is shown in the falt field image below'.

 

Dark current	3e per hour, measured 1 hour after power-up.
Cosmetics	Column 234 slightly bright, no dark columns
Fringeing	See graph of fringe amplitude vs wavelength
Point Spread Function	See graph of FWHM vs wavelength

This page last updated : 12th May 2002
awr@ing.iac.es