2 Chip EEV Mosaic with Ultradas







Device Identification
 
 
Mosaic name 2EEV
Year of manufacture 1999
Serial numbers CCD1  7461-14-6 
CCD2  7461-11-6
First Light on La Palma Initial commissioning by Simon Tulloch November 1999
Description The camera contains two EEV-42-80 thinned and AR coated CCDs butted along their long axis to provide a 4K x 4K pixel mosaic.

For further mechanical and defect information regarding these devices see ING Technical note 119 The 2 Chip EEV Mosaic by S.Tulloch.
The electronic information in technical note 119 refers to the dutch controller and is superseded by the information on this page.

Operational Characteristics
 
Readout Speed
Gain (e/ADU)
Noise (e)
Bias (ADU)
Linearity (ADU)
Chip 1
High speed (61 s)
2.3
6
870
53K
Chip 2
1.94
6
777
54K
Chip 1
Low speed (75 s)
1.46
4
1001
59K
Chip 2
1.23
4
903
62K

Windowing

When windowing the mosaic is considered a single large chip measuring 4308 x 4200 pixels.

Binning

Is currently not available.
 

Linearity



 

Physical Characteristics
 
 
Pixel Size 13.5 microns x 13.5 microns
X size of digitised area in pixels (each ccd) 2154
Y size of digitised area in pixels (each ccd) 4200
X size of useful imaging area ( each ccd ) 2048
Y size of useful imaging area ( each ccd ) 4100
X start of useful imaging area ( each ccd ) 53
Y start of useful imaging area ( each ccd ) 1
LN2 capacity of cryostat 2.5 litres

Mosaic Coplanarity and Spacing

Mosaic alignment with Cryostat

Operational Parameters
 
 
Operating temperature 153K
Preferred amplifier CCD1 - RHS, 
CCD2 - RHS
Anti blooming -

Measured Characteristics

Quantum Efficiency ( @-120C )
 
380nm
400nm
650nm
950nm
CCD1
62%
78%
75%
14%
CCD2
67%
81%
76%
13%

Dark Current ( @-120C )

        CCD1  No measurable dark current.
        CCD2  No measurable dark current.

Cosmic Ray count      ~2000 counts/chip/hour at sea-level
 

Full Well Bloom Limit

        CCD1  170000 electrons.
        CCD2  210000 electrons.
 

Charge Transfer Efficiency

Low level corresponds to a signal charge of 1600 electrons, High level to a signal level of 100,000 electrons.
 
 
CCD1 VCTE Lo-level VCTE Hi-level HCTE Lo-level HCTE Hi-level
Left Output 0.999998 0.999997 0.999997 0.999998
Right Output 0.999998 0.999997 0.999997 0.999998

 
CCD2 VCTE Lo-level HCTE Lo-level
Left Output >0.999999 0.999997
Right Output >0.999999

Pretty pictures


M42                                                                    Horse head

This page last updated : 14th February 2001
awr@ing.iac.es