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Vela |
: ESO CCD Test
Report |
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General
information |
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EEV 44-82-1-A57 |
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CCD Name : |
Vela |
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Grade : |
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Science |
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Serial Number : |
02353-06-02 |
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Type :
Backside, Single layer AR Pixel size 15 x 15 μm |
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Number of
photosensitive pixels 2048 x 4102 [HxV] |
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Number of
outputs : 2 |
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Overall rating
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Measurement made by |
SDE |
the |
28/04/0300 |
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Data reduced by |
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JT |
the |
1-May-2003 |
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Setup |
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D-Marc 2 |
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Position in the
head |
A |
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Tested with the
CCD |
Volans |
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Concession form |
/ |
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Volt table |
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Channel voltage
potential |
10.55 |
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This table
defines the voltages which will be applied to peripherals |
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at
initialisation time. It also defines the high and low limits which may |
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be set for
these voltages |
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BIASBRD is for the EEV
CCD-44 in the mosaic |
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# BRD_ID
PERIPH_ID |
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# CONNECTOR P0
- A |
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LOW |
HIGH |
TOLERANCE |
INIT_VAL |
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BRD_ANABIAS0
ANB_PRESET_VOLT_A |
-3500 |
-1000 |
10000 |
-3500 |
#OG1R |
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BRD_ANABIAS0
ANB_PRESET_VOLT_B |
-2500 |
-1000 |
10000 |
-2500 |
#OG2R |
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BRD_ANABIAS0
ANB_PRESET_VOLT_C |
2000 |
25000 |
10000 |
22600 |
#ODR |
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BRD_ANABIAS0
ANB_PRESET_VOLT_D |
2000 |
15000 |
10000 |
12050 |
#RDR |
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BRD_ANABIAS0
ANB_PRESET_VOLT_E |
2000 |
25000 |
10000 |
25000 |
#JDR |
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BRD_ANABIAS0
ANB_PRESET_VOLT_F |
0 |
0 |
0 |
0 |
#not used |
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BRD_ANABIAS0
ANB_PRESET_VOLT_G |
0 |
0 |
0 |
0 |
#not used |
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BRD_ANABIAS0
ANB_PRESET_VOLT_H |
0 |
0 |
0 |
0 |
#not used |
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# CONNECTOR PO
- B |
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LOW |
HIGH |
TOLERANCE |
INIT_VAL |
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BRD_ANABIAS0
ANB_PRESET_VOLT_I |
-3500 |
-1000 |
10000 |
-3500 |
#OG1L |
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BRD_ANABIAS0
ANB_PRESET_VOLT_J |
-2500 |
-1000 |
10000 |
-2500 |
#OG2L |
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BRD_ANABIAS0
ANB_PRESET_VOLT_K |
2000 |
25000 |
10000 |
22600 |
#ODL |
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BRD_ANABIAS0
ANB_PRESET_VOLT_L |
2000 |
15000 |
10000 |
12050 |
#RDL |
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BRD_ANABIAS0
ANB_PRESET_VOLT_M |
2000 |
25000 |
10000 |
25000 |
#JDL |
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BRD_ANABIAS0
ANB_PRESET_VOLT_N |
0 |
0 |
0 |
0 |
#not used |
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BRD_ANABIAS0
ANB_PRESET_VOLT_O |
2000 |
19000 |
10000 |
18000 |
#DDLR |
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BRD_ANABIAS0
ANB_PRESET_VOLT_P |
0 |
0 |
0 |
0 |
#not used |
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#The anabias
board also has an opto isolated peripheral |
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BRD_ANABIAS0
ANB_OPTOOUT |
0 |
32767 |
4 |
255 |
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CLOCKDRIVER
BOARD 0 is for the EEV CCD44 in the mosaic |
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# BRD_ID PERIPH_ID |
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#
CONNECTOR PO-A |
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LOW |
HIGH |
TOLERENCE |
INIT_VAL |
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BRD_CLKDRV0
CLKDRV_DAC0_LO |
-5000 |
-5000 |
1000 |
-5000 |
#SWL |
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BRD_CLKDRV0
CLKDRV_DAC0_HI |
5000 |
5000 |
1000 |
5000 |
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BRD_CLKDRV0
CLKDRV_DAC1_LO |
-5000 |
-5000 |
1000 |
-5000 |
#SWR |
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BRD_CLKDRV0
CLKDRV_DAC1_HI |
5000 |
5000 |
1000 |
5000 |
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BRD_CLKDRV0
CLKDRV_DAC2_LO |
-5000 |
-5000 |
1000 |
-5000 |
#RF3 |
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BRD_CLKDRV0
CLKDRV_DAC2_HI |
5000 |
5000 |
1000 |
5000 |
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BRD_CLKDRV0
CLKDRV_DAC3_LO |
-5000 |
-5000 |
1000 |
-5000 |
#RF2L |
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BRD_CLKDRV0
CLKDRV_DAC3_HI |
5000 |
5000 |
1000 |
5000 |
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BRD_CLKDRV0
CLKDRV_DAC4_LO |
-5000 |
-5000 |
1000 |
-5000 |
#RF1L |
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BRD_CLKDRV0
CLKDRV_DAC4_HI |
5000 |
5000 |
1000 |
5000 |
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BRD_CLKDRV0
CLKDRV_DAC5_LO |
-5000 |
-5000 |
1000 |
-5000 |
#RF2R |
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BRD_CLKDRV0
CLKDRV_DAC5_HI |
5000 |
5000 |
1000 |
5000 |
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BRD_CLKDRV0
CLKDRV_DAC6_LO |
-5000 |
-5000 |
1000 |
-5000 |
#RF1R |
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BRD_CLKDRV0
CLKDRV_DAC6_HI |
5000 |
5000 |
1000 |
5000 |
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BRD_CLKDRV0
CLKDRV_DAC7_LO |
-6000 |
-6000 |
1000 |
-6000 |
#DG |
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BRD_CLKDRV0
CLKDRV_DAC7_HI |
6000 |
6000 |
1000 |
6000 |
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# CONNECTOR PO-B |
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LOW |
HIGH |
TOLERENCE |
INIT_VAL |
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BRD_CLKDRV0
CLKDRV_DAC8_LO |
-12000 |
-4000 |
1000 |
-8000 |
#IF1 |
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BRD_CLKDRV0
CLKDRV_DAC8_HI |
-2000 |
3000 |
1000 |
2000 |
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BRD_CLKDRV0
CLKDRV_DAC9_LO |
-12000 |
-4000 |
1000 |
-8000 |
#IF2 |
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BRD_CLKDRV0
CLKDRV_DAC9_HI |
-2000 |
3000 |
1000 |
2000 |
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BRD_CLKDRV0
CLKDRV_DAC10_LO |
-12000 |
-4000 |
1000 |
-8000 |
#IF3 |
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BRD_CLKDRV0
CLKDRV_DAC10_HI |
-2000 |
3000 |
1000 |
2000 |
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BRD_CLKDRV0
CLKDRV_DAC11_LO |
0 |
0 |
1000 |
0 |
#empty |
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BRD_CLKDRV0
CLKDRV_DAC11_HI |
0 |
0 |
1000 |
0 |
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BRD_CLKDRV0
CLKDRV_DAC12_LO |
-6000 |
-4000 |
1000 |
-6000 |
#FRL |
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BRD_CLKDRV0
CLKDRV_DAC12_HI |
6000 |
8000 |
1000 |
6000 |
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BRD_CLKDRV0
CLKDRV_DAC13_LO |
-6000 |
-4000 |
1000 |
-6000 |
#FRR |
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BRD_CLKDRV0
CLKDRV_DAC13_HI |
6000 |
8000 |
1000 |
6000 |
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# |
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# Gain should
be interpreted as follows |
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# There are two
gains, gain1 is on the preamp, gain2 is on the video board. |
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# Gain1 = |
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# 3 == 1.5 |
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# 1 == 2.25 |
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# 0 == 3.0 |
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# |
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# Gain2 = |
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#
0 = Minimum (2.5) |
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#
1 = Maximum (12.5) |
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# |
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# BRD_ID
PERIPH_ID |
LOW |
HIGH |
TOLERANCE |
INIT_VAL |
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BRD_VIDBRD0
VID_GAIN1_CHAN0 |
0 |
3 |
0 |
1 |
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BRD_VIDBRD0
VID_GAIN1_CHAN1 |
0 |
3 |
0 |
1 |
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BRD_VIDBRD0
VID_GAIN1_CHAN2 |
0 |
3 |
0 |
1 |
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BRD_VIDBRD0
VID_GAIN1_CHAN3 |
0 |
3 |
0 |
1 |
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BRD_VIDBRD0
VID_GAIN2_CHAN0 |
0 |
1 |
0 |
0 |
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BRD_VIDBRD0
VID_GAIN2_CHAN1 |
0 |
1 |
0 |
0 |
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BRD_VIDBRD0
VID_GAIN2_CHAN2 |
0 |
1 |
0 |
0 |
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BRD_VIDBRD0
VID_GAIN2_CHAN3 |
0 |
1 |
0 |
0 |
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BRD_VIDBRD0
VID_FILT_CHAN0 |
0 |
3 |
0 |
0 |
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BRD_VIDBRD0
VID_FILT_CHAN1 |
0 |
3 |
0 |
0 |
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BRD_VIDBRD0
VID_FILT_CHAN2 |
0 |
3 |
0 |
0 |
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BRD_VIDBRD0
VID_FILT_CHAN3 |
0 |
3 |
0 |
0 |
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BRD_VIDBRD0
VID_TESTVID_CHAN0 |
0 |
1 |
0 |
0 |
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BRD_VIDBRD0
VID_TESTVID_CHAN1 |
0 |
1 |
0 |
0 |
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BRD_VIDBRD0
VID_TESTVID_CHAN2 |
0 |
1 |
0 |
0 |
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BRD_VIDBRD0
VID_TESTVID_CHAN3 |
0 |
1 |
0 |
0 |
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# Video Offsets
are in 0.001 volts |
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# BRD_ID
PERIPH_ID |
LOW |
HIGH |
TOLERANCE |
INIT_VAL |
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BRD_VIDBRD0
VID_OFFSET_CHAN0 |
0 |
65535 |
6553 |
0 |
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|
BRD_VIDBRD0
VID_OFFSET_CHAN1 |
0 |
65535 |
6553 |
0 |
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|
BRD_VIDBRD0
VID_OFFSET_CHAN2 |
0 |
65535 |
6553 |
0 |
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|
BRD_VIDBRD0
VID_OFFSET_CHAN3 |
0 |
65535 |
6553 |
0 |
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Quantum
Efficiency |
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Clock mode : |
225kpx/rr/HG/512 |
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Conversion
factor |
1.0875e-/ADU |
±0.004573 |
for |
23161.3ADU |
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Rms noise : |
3.7595e- |
±0.03547 |
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CCD Temperature
: |
-120.2Cº |
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Wav. |
QE% |
QE error |
PRNU rms% |
|
Wav. |
QE% |
QE error |
PRNU rms% |
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|
300 |
48.8 |
0.2 |
2.3 |
|
660 |
74.5 |
0.0 |
0.9 |
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|
|
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|
|
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|
310 |
73.9 |
0.0 |
2.0 |
|
680 |
72.3 |
0.0 |
0.9 |
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|
320 |
71.1 |
0.0 |
1.9 |
|
700 |
69.6 |
0.3 |
1.0 |
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|
330 |
73.2 |
0.0 |
1.8 |
|
720 |
66.0 |
0.0 |
1.0 |
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340 |
74.3 |
0.0 |
1.8 |
|
740 |
62.1 |
0.0 |
1.0 |
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|
350 |
74.2 |
0.0 |
1.8 |
|
750 |
59.8 |
0.0 |
1.0 |
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360 |
73.6 |
0.0 |
1.8 |
|
760 |
57.5 |
0.0 |
1.0 |
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|
370 |
69.4 |
0.1 |
1.6 |
|
780 |
52.8 |
0.0 |
1.0 |
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|
380 |
79.4 |
0.1 |
1.3 |
|
800 |
48.3 |
0.0 |
1.1 |
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|
390 |
82.8 |
0.1 |
1.2 |
|
820 |
44.1 |
0.0 |
1.1 |
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400 |
84.9 |
0.1 |
1.1 |
|
840 |
38.5 |
0.0 |
1.1 |
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420 |
86.2 |
0.0 |
1.0 |
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850 |
36.7 |
0.0 |
1.1 |
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440 |
86.0 |
0.1 |
1.0 |
|
860 |
34.9 |
0.0 |
1.1 |
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450 |
85.7 |
0.0 |
0.9 |
|
880 |
30.2 |
0.0 |
1.2 |
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460 |
85.3 |
0.0 |
0.9 |
|
900 |
24.7 |
0.0 |
1.3 |
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480 |
84.1 |
0.0 |
0.9 |
|
920 |
19.7 |
0.0 |
1.4 |
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|
500 |
82.7 |
0.1 |
0.9 |
|
940 |
14.6 |
0.0 |
1.3 |
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520 |
81.6 |
0.0 |
0.9 |
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950 |
12.4 |
0.0 |
1.3 |
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540 |
80.8 |
0.0 |
0.9 |
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960 |
10.2 |
0.0 |
1.3 |
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550 |
80.5 |
0.0 |
0.9 |
|
980 |
6.8 |
0.0 |
1.4 |
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560 |
80.2 |
0.0 |
0.9 |
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1000 |
3.9 |
0.0 |
1.6 |
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580 |
79.6 |
0.0 |
0.9 |
|
1020 |
1.9 |
0.0 |
2.4 |
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600 |
78.8 |
0.0 |
0.9 |
|
1040 |
0.7 |
0.0 |
3.0 |
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620 |
77.8 |
0.0 |
0.9 |
|
1060 |
0.3 |
0.0 |
3.1 |
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640 |
76.4 |
0.0 |
0.9 |
|
1080 |
0.2 |
0.0 |
3.6 |
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650 |
75.5 |
0.0 |
0.9 |
|
1100 |
0.1 |
0.0 |
5.4 |
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Table 1: Measurements of the quantum efficiency and PRNU |
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Quantum
efficiency, comparison |
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In this section
you can compare the QE we measured with the testbench and: |
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l QE Minimum specification |
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l Typical QE |
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l QE from Marconi |
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Figure
1: Comparison between the
QE measured by ESO, the QE measured by Marconi, ESO specification and minimum
specification |
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Figure 2: Ratio between the ESO measurements and the ESO minimum
specification |
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Quantum
efficiency, special specification |
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Special
specification |
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Wavelength
(nm) |
Minimum spec.(%) |
ESO measure. (%) |
Result |
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350 |
50 |
74.2 |
OK |
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400 |
80 |
84.9 |
OK |
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650 |
80 |
75.5 |
Under
the minimum spec. |
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900 |
25 |
24.7 |
Under
the minimum spec. |
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Conclusion: |
No
this ccd is not in the 25% |
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Table 2: Minimum specification for 25% of the ccds. |
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Difference
between QE measurements made by ESO and Marconi |
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Comparison
QE ESO and Marconi |
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|
Wavelength (nm) |
QE ESO (%) |
QE E2V (%) |
Difference (ESO - E2V %) |
Relative diff. (E2V as reference %) |
Ratio QE ESO / QE E2V |
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350 |
74.2 |
79.1 |
-4.9 |
-6.2 |
0.9 |
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400 |
84.9 |
86.2 |
-1.3 |
-1.5 |
1.0 |
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500 |
82.7 |
81.3 |
1.4 |
1.7 |
1.0 |
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650 |
75.5 |
75.8 |
-0.3 |
-0.5 |
1.0 |
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Table 3: Difference and relative difference between ESO measurements
and E2V |
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Figure 3: Graphic representation of the fdifference and the relative
difference |
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Figure 4: Ration between the ESO measurements and the E2V Measurements |
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PRNU comparison |
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In this section
you can compare the PRNU we measured at ESO and: |
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l PRNU Minimum
specification |
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l PRNU from Marconi |
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Figure
5: Comparison between the
PRNU measured by ESO, the PRNU measured by Marconi, and the maximum
specification |
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Figure 6: Ratio between the ESO measurements and the maximum
specification |
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Comparison
PRNU ESO and PRNU Marconi |
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|
Wavelength (nm) |
PRNU ESO (rms %) |
Maximum spec. |
PRNU E2V |
Difference (ESO - E2V) |
Relative difference (E2V as
reference) |
Ratio PRNU ESO / PRNU E2V |
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320 |
1.9 |
6.0 |
/ |
/ |
/ |
/ |
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350 |
1.8 |
5.0 |
1.6 |
0.2 |
12.5 |
1.1 |
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400 |
1.1 |
2.5 |
1.1 |
0.0 |
-2.7 |
1.0 |
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500 |
0.9 |
2.0 |
1.0 |
-0.1 |
-7.4 |
0.9 |
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Table 4: difference and relative difference between ESO and E2V
measurements |
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Comparison with
the contract |
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In this
section you will see the if the values we have measured for the QE and the
PRNU are in accordance with the contract. |
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Wavelength
(nm) |
QE |
PRNU |
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320 |
OK |
OK |
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340 |
OK |
/ |
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350 |
OK |
OK |
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360 |
OK |
/ |
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380 |
OK |
/ |
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400 |
OK |
OK |
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450 |
OK |
OK |
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500 |
Below the specification |
OK |
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550 |
Below the specification |
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600 |
Below the specification |
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650 |
OK |
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700 |
OK |
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750 |
OK |
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800 |
OK |
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850 |
OK |
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900 |
Below the specification |
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950 |
Below the specification |
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1000 |
Below the specification |
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Table 5: Comparison between the values we have measured and the
specifications in the contract |
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Cosmetic |
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Click here to see
the images |
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Cosmetic defects |
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In this
section we expose the hot pixel, the dark pixel, the trap and the very large
trap we have found. |
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Hot pixel |
A hot pixel provides a signal of > 60 e- / pixel / hour. |
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Very bright
pixel |
a very bright pixel provides a
signal of > 200000 e-/pixel/hour |
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Dark pixel |
A dark pixel is one with 50% or
less than the average output for uniform intensity light level, measured with
a flat field level around 500 photo-electrons |
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Trap |
A trap is defined as a pixel that
captures more than 10 electrons, measured with a flat field level around 500
photo-electrons. |
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Very large trap |
A very large trap is defined as a
pixel that captures more than 10 000 electrons, measured with a flat field
level around 90% of full well capability. |
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Bad column |
A bad column is 10 or more contiguous hot or dark pixels in
a single column or a very bright pixel or a very large trap. |
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Hot pixel |
Dark pixel |
Very bright pixel (a) |
Trap |
Very large trap (b) |
Sup. 10 contiguous pixels (c) |
Total bad column (a+b+c) |
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ESO |
0 |
6 |
0 |
3 |
2 |
6 |
8 |
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E2V |
3 |
0 |
2 |
0 |
0 |
0 |
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Table 6: Cosmetic defects measured by ESO and E2V |
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Dark and Bias |
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Click here to
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Readout noise
and conversion factor |
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Conversion
factor, recommend specification: |
0.55 |
e-/pixel/hour |
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Maximum readout
noise at 50kpix/s: |
2 |
e- |
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Maximum readout
noise at 225kpix/s: |
2.8 |
e- |
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Conversion factor |
Readout noise |
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50kpix/s |
Left
port |
0.53 |
2.75 |
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Right
port |
0.52 |
2.77 |
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225kpix/s |
Left
port |
0.54 |
3.85 |
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Right
port |
0.53 |
3.74 |
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Table 7: Readout noise and Conversion factor measured at 50 and
225kpix/s |
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Linearity |
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Minimum
specification: |
1 |
(%) |
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Rms non
linearity (%) |
0.33 |
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Peak to
peak non linearity (%) |
1.17 |
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Table 8: Linearity |
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Click here to see
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Dark current |
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Exposure time
(s): |
3600 |
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Readout mode: |
50kpix/s |
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Port: |
Right |
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Minimum
specification: |
2 |
e-/pixel/hour |
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Dark current |
error |
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0.50 |
0.10 |
ADU/pixel/hour |
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0.26 |
0.05 |
e-/pixel/hour |
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Table 9: Dark current in electron per pixel and per hour |
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Charge Transfer
Efficiency (CTE) |
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Method used: |
EPER |
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Minimum
specification: |
0.999995 |
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CTE (ESO) |
CTE
(E2V) |
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CTE Serial (Horizontal) Left |
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0.999995 |
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CTE Serial (Horizontal) Right |
0.999997 |
0.999995 |
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CTE Parallel (Vertical) |
0.999999 |
1 |
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Table 10: Charge transfer efficiency measured at 50kpix/s and the
high gain amplification |
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