RED+4 Parameters with UltraDAS + SDSU Gen.3
Device Identification
| Chip name |
Red+4 |
| Year of manufacture |
2011 |
| Serial number |
08443-22-01 |
| Britannia number |
500625 |
| First light on La Palma |
20th May 2013 |
| Description |
Deep Depletion with additional fringe suppression and an AR coating
peaking at 900nm.
Chip type CCD231-84 |
Operational Characteristics
| Speed |
Slow |
Fast |
| Bias(ADU) |
3180 |
1210
|
| Gain(e/ADU) |
0.69
|
1.0 |
| Read noise(e) |
4.2
|
5.6 |
| Read noise(ADU) |
6.0 |
5.6 |
Linear to(ADU)
{also see graphs below} |
<1% to 60K
|
<1% to 60K
|
Readout time (s) binned 1 x 1 |
50 |
39 |
| Readout time(s) binned 2 x 2 |
18
|
15 |
.
 
Windowing : available with no reduction in performance.
Binning : available with no reduction in performance.
| Vertical CTE |
0.999998
|
| Horizontal CTE |
0.999996
|
Physical Characteristics
| X Pixel size |
15 microns |
| Y Pixel size |
15 microns |
| X size in pixels of digitised area |
4196
|
| Y size in pixels of digitised area |
4112
|
| X size of useful imaging area |
4096
|
| Y size of useful imaging area |
4112
|
| X start of useful imaging area |
50
|
| Ystart of useful imaging area |
1
|
| LN2 capacity of cryostat |
2.5 litres |
| Cryostat window thickness |
5 mm |
| Distance from window to CCD |
10 mm |
| Cryostat window size |
100 mm diameter |
Operational Parameters
| Flooding type |
none |
| Operating temperature |
158K
|
| Cool down time |
4 hours see graph |
| Preferred amplifier |
F (all are good) |
Measured Characteristics
This graph shows fringing for Red+4 (red) and it's predecessor the WHTWFC (blue).
| Dark current |
6 e/pix/hour
|
| Chip flatness |
5 microns peak to valley |
 |
Detectors
Last Modified: 27 March 2014
|
|
| 
