Figure 1: Comparison between the QE measured by ESO, the QE measured by Marconi, ESO specification and minimum specification.
Figure 2: Ratio between the ESO measurements and the ESO minimum specification.
Measurement made by Boris Gaillard the:
06 June 2001
Data reduced by Fabrice
Christen the: 30 Nov. 2001
during one hour dark exposure the impacts of cosmic with very high energy produce dark columns.
Clock mode: 225kpx/rr/HG/512 Conversion Factor= 0.519 e-/ADU ± 0.002 for 23345.7 ADU RMS noise = 4.6 e- ± 0.3 CCD temperature : -110.0Cº Window area is : X1= 58 X2= 2073 Y1= 103 Y2= 505 Bandwidth 5nm
|
Wav. |
Qe Hydrus |
Error |
PRNU RMS (%) |
Phase |
|
320 |
45.3 |
0.5 |
3.9 |
6.72 |
|
330 |
53.1 |
0.5 |
3.68 |
6.66 |
|
340 |
56.1 |
0.6 |
3.56 |
6.63 |
|
350 |
57.3 |
0.6 |
3.56 |
6.63 |
|
360 |
58.0 |
0.6 |
3.54 |
6.62 |
|
370 |
62.3 |
0.6 |
3.22 |
6.53 |
|
380 |
71.8 |
0.7 |
2.53 |
6.28 |
|
390 |
79.5 |
0.8 |
2.11 |
6.1 |
|
400 |
83.9 |
0.8 |
1.88 |
5.98 |
|
420 |
87.8 |
0.9 |
1.74 |
5.9 |
|
440 |
89.5 |
0.9 |
1.71 |
5.88 |
|
450 |
89.4 |
0.9 |
0 |
5.9 |
|
460 |
89.4 |
0.9 |
1.77 |
5.92 |
|
480 |
88.9 |
0.7 |
1.66 |
5.85 |
|
500 |
88.5 |
0.9 |
1.73 |
5.9 |
|
520 |
87.6 |
0.9 |
1.7 |
5.88 |
|
540 |
86.8 |
0.9 |
1.69 |
5.87 |
|
550 |
86.5 |
0.9 |
0 |
5.87 |
|
560 |
86.1 |
0.9 |
1.68 |
5.87 |
|
580 |
85.1 |
0.8 |
1.63 |
5.84 |
|
600 |
84.0 |
0.8 |
1.73 |
5.9 |
|
620 |
82.8 |
0.8 |
1.75 |
5.92 |
|
640 |
81.3 |
0.8 |
1.75 |
5.92 |
|
650 |
80.3 |
0.8 |
0 |
5.95 |
|
660 |
79.3 |
0.8 |
1.84 |
5.97 |
|
680 |
77.1 |
0.8 |
1.77 |
5.93 |
|
700 |
73.7 |
0.7 |
1.83 |
5.96 |
|
720 |
67.9 |
0.7 |
1.92 |
6.01 |
|
740 |
62.9 |
0.7 |
2.03 |
6.07 |
|
750 |
60.3 |
0.6 |
0 |
6.06 |
|
760 |
57.8 |
0.6 |
2.03 |
6.06 |
|
780 |
53.1 |
0.6 |
2.08 |
6.09 |
|
800 |
49.2 |
0.5 |
2.2 |
6.15 |
|
820 |
45.6 |
0.5 |
2.13 |
6.11 |
|
840 |
41.3 |
0.4 |
2.16 |
6.13 |
|
850 |
39.0 |
0.4 |
0 |
6.13 |
|
860 |
36.7 |
0.4 |
2.15 |
6.12 |
|
880 |
32.1 |
0.3 |
2.28 |
6.19 |
|
900 |
27.0 |
0.3 |
2.8 |
6.4 |
|
920 |
21.8 |
0.2 |
3.84 |
6.7 |
|
940 |
16.3 |
0.2 |
5.2 |
6.95 |
|
950 |
14.0 |
0.1 |
0 |
7.05 |
|
960 |
11.7 |
0.1 |
6.41 |
7.15 |
|
980 |
7.8 |
0.1 |
7.65 |
7.31 |
|
1000 |
4.53 |
0.05 |
8.71 |
7.38 |
|
1040 |
0.91 |
0.01 |
8.41 |
7.38 |
|
1100 |
0.120 |
0.001 |
8.6 |
7.5 |
Table 1: Measurement of the Quantum Efficiency.
In this section you can compare the QE we measured with the testbench and:
QE Minimum specification
Typical QE
QE from Marconi
|
|
|
|---|---|
Figure 1: Comparison between the QE measured by ESO, the QE measured by Marconi, ESO specification and minimum specification. |
Figure 2: Ratio between the ESO measurements and the ESO minimum specification. |
|
Special specification |
|||
|
Wavelength(nm) |
Minimum spec. (%) |
ESO measurements (%) |
Result |
|
350 |
50 |
57.28 |
OK |
|
400 |
80 |
83.92 |
OK |
|
650 |
80 |
80.3 |
OK |
|
900 |
25 |
27.05 |
OK |
|
Conclusion: |
OK this ccd is in the 25% |
||
Table 2: Minimum specification for 25% of the ccds.
|
Comparison QE ESO and QE Marconi |
|||||
|
Wavelength (nm) |
QE ESO (%) |
Qe Marconi (%) |
Difference (Eso - Marc. %) |
Relative difference (Marconi as reference %) |
Ratio QE ESO / QE Marconi |
|
350 |
57.28 |
56.5 |
0.78 |
1.4 |
1.01 |
|
400 |
83.92 |
81.9 |
2.02 |
2.5 |
1.02 |
|
500 |
88.5 |
84.3 |
4.2 |
5.0 |
1.05 |
|
650 |
80.3 |
76.8 |
3.5 |
4.6 |
1.05 |
|
900 |
27.05 |
28.1 |
-1.05 |
-3.8 |
0.96 |
Table 3: Difference and relative difference between ESO measurements and Marconi.
|
|
|
|---|---|
Figure 3: Graphic representation of the difference and the relative difference. |
Figure 4: Ratio between the ESO measurements and the Marconi measurements |
In this section you can compare the PRNU we measured at ESO and:
PRNU Minimum specification
PRNU from Marconi
|
|
|
|---|---|
|
Figure 5: Comparison between the PRNU measured by ESO, the PRNU measured by Marconi, and the maximum specification. |
Figure 6: Ratio between the ESO measurements and the Maximum specification. |
|
|
|
|
Figure 7: Graphic representation of the difference and the relative difference. |
Figure 8: Ratio between the ESO measurements and the Marconi measurements. |
|
Comparison QE ESO and QE Marconi |
||||||
|
Wavelength (nm) |
PRNU ESO (rms %) |
Maximum spec. |
PRNU Marconi |
Difference (ESO – Marc.) |
Relative difference (Marc. as reference) |
Ratio PRNU ESO / PRNU Marconi |
|
320 |
3.9 |
6 |
|
|
|
|
|
350 |
3.56 |
5 |
3.3 |
0.26 |
7.88 |
1.08 |
|
400 |
1.88 |
2.5 |
1.5 |
0.38 |
25.33 |
1.25 |
|
500 |
1.73 |
2 |
1.2 |
0.53 |
44.17 |
1.44 |
Table 4: Difference and relative difference between ESO measurements and Marconi.
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.
|
Wavelength (nm) |
Qe |
PRNU |
|
320 |
OK |
OK |
|
340 |
OK |
|
|
350 |
OK |
OK |
|
360 |
OK |
|
|
380 |
OK |
|
|
400 |
OK |
OK |
|
450 |
OK |
OK |
|
500 |
OK |
OK |
|
550 |
OK |
|
|
600 |
OK |
|
|
650 |
OK |
|
|
700 |
OK |
|
|
750 |
OK |
|
|
800 |
OK |
|
|
850 |
OK |
|
|
900 |
OK |
|
|
950 |
Below the specification |
|
|
1000 |
Below the specification |
|
Table 5: Comparison between the values we have measured and the specifications in the contract.
For the flat field we use three wavelengths, 350nm, 600nm and 900nm. For each wavelength we make two images, high level (45000 ADU) and low level (1000 ADU).
350nm (UV), bandwidth 5nm |
600nm, bandwidth 5nm |
900nm, bandwidth 5nm |
|||
|
|
|
|
|
|
|
High level |
Low level |
High level |
Low level |
High level |
Low level |
Table 6: Flat field for three wavelengths.
The time exposure, for the long dark exposure, is 3600 seconds.
|
Bias |
Long exposure dark image |
|---|---|
|
|
|
Table 7: Bias and dark.
Clock mode: 225kpx/rlrl/HG/512 CCD Hydrus Left readout port Conversion Factor= 0.51953e-/ADU ±0.001662 for 20522.6ADU RMS noise = 4.488e- ±0.218 Right readout port Conversion Factor= 0.51865e-/ADU ±0.001883 for 20641.4ADU RMS noise = 5.1932e- ±0.2528 Clock mode: 50kpx/rlrl/HG/512 CCD Hydrus Left readout port Conversion Factor= 0.50335e-/ADU ±0.001642 for 20453.4ADU RMS noise = 3.4516e- ±0.2691 Right readout port Conversion Factor= 0.47613e-/ADU ±0.01811 for 20606.2ADU RMS noise = 3.0405e- ±0.1609
RMS non linearity (%) = 0.11 Peak to peak non linearity (%)= 0.32
Figure 9: Error of linearity
Figure 10: Residual non linearity.
Exposure time (s) = 3600 Dark current : 3.94 ± 0.05 ADU/hour/pixel Dark current : 2.20 ± 0.03 e-/hour/pixel
Dark current : Value ± Value e-/hour/pixel Low level (Around 2500 ADU) Horizontal CTE = Value Vertical CTE = Value High level (Around 25000 ADU) Horizontal CTE = Value Vertical CTE = Value
In this section we expose the hot pixel, the dark pixel, the trap and the very large trap we found.
A hot pixel provides a signal of > 60 e- / pixel / hour.
Result: 54 hot points.
a very bright pixel provides a signal of > 200000 e-/pixel/hour
Result: 8 very bright 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.
Result: 4072 dark pixels detected.
A trap is defined as a pixel that captures more than 10 electrons, measured with a flat field level around 500 photo-electrons.
Result: 2 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.
Result: 94 very large trap.
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.
Result: 3 bad columns.
Here is a summary of cosmetic defects:
|
|
Hot pixel |
Dark pixel |
A very bright pixel (a) |
Trap |
Very large trap (b) |
Sup. 10 contiguous pixels (c) |
Total bad column (a+b+c) |
|---|---|---|---|---|---|---|---|
|
ESO |
54 |
4072 |
8 |
2 |
94 |
3 |
|
|
Marconi |
56 |
4 |
7 |
5 |
1 |
|
|
Table 8: Summary of cosmetic defects.
The number of very large trap from ESO is suspicious. This calculation will be improved.
############################################################################### #Author: Cyril CAVADORE #CAMERA: Double Marconi ( Mosaic 2 Marconi/EEV ) #Purpose: This is the global voltage definition table micro sequences # European Southern Observatory (ESO) #Date: 20.11.00 ############################################################################### # GOBAL VOLTAGE DEFINITION TABLE # # This table defines the voltages which will be applied to peripherals # at initialisation time. It also defines the high and low limits which may # be set for these voltages ############################################################################### # BRD_ID PERIPH_ID LOW HIGH TOLERANCE INIT_VAL # # Anabias voltages are in 0.001 volts # ############################################################################### # BIASBRD 0 is for the EEV CCD-44 in the mosaic ############################################################################### # BRD_ID PERIPH_ID LOW HIGH TOLERANCE INIT_VAL # CONNECTOR P0 - A BRD_ANABIAS0 ANB_PRESET_VOLT_A -3500 -1000 10000 -3500 #OG1R VOG1 BRD_ANABIAS0 ANB_PRESET_VOLT_B -2500 -1000 10000 -2500 #OG2R VOG2 BRD_ANABIAS0 ANB_PRESET_VOLT_C 2000 25000 10000 21000 #ODR VOD BRD_ANABIAS0 ANB_PRESET_VOLT_D 2000 15000 10000 10500 #RDR VRD BRD_ANABIAS0 ANB_PRESET_VOLT_E 2000 25000 10000 24000 #JDR JFETVoltage BRD_ANABIAS0 ANB_PRESET_VOLT_F 0 0 0 0 #not used BRD_ANABIAS0 ANB_PRESET_VOLT_G 0 0 0 0 #not used BRD_ANABIAS0 ANB_PRESET_VOLT_H 0 0 0 0 #not used # CONNECTOR PO - B BRD_ANABIAS0 ANB_PRESET_VOLT_I -3500 -1000 10000 -3500 #OG1L VOG1 BRD_ANABIAS0 ANB_PRESET_VOLT_J -2500 -1000 10000 -2500 #OG2L VOG2 BRD_ANABIAS0 ANB_PRESET_VOLT_K 2000 25000 10000 21000 #ODL VOD BRD_ANABIAS0 ANB_PRESET_VOLT_L 2000 15000 10000 10500 #RDL VRD BRD_ANABIAS0 ANB_PRESET_VOLT_M 2000 25000 10000 24000 #JDL JFETVoltage BRD_ANABIAS0 ANB_PRESET_VOLT_N 0 0 0 0 #not used BRD_ANABIAS0 ANB_PRESET_VOLT_O 2000 19000 10000 18000 #DDLR VDD BRD_ANABIAS0 ANB_PRESET_VOLT_P 0 0 0 0 #not used #The anabias board also has an opto isolated peripheral BRD_ANABIAS0 ANB_OPTOOUT 0 32767 4 255 # ################################################################################ # Clock driver rail voltages are in 0.001 volts # ################################################################################ #CLOCKDRIVER BOARD 0 is for the EEV CCD44 in the mosaic ################################################################################ # # # BRD_ID PERIPH_ID LOW HIGH TOLERANCE INIT_VAL # # CONNECTOR PO-A # BRD_CLKDRV0 CLKDRV_DAC0_LO -5000 -5000 1000 -5000 #SWL VRPhi BRD_CLKDRV0 CLKDRV_DAC0_HI 5000 5000 1000 5000 BRD_CLKDRV0 CLKDRV_DAC1_LO -5000 -5000 1000 -5000 #SWR VRPhi BRD_CLKDRV0 CLKDRV_DAC1_HI 5000 5000 1000 5000 BRD_CLKDRV0 CLKDRV_DAC2_LO -5000 -5000 1000 -5000 #RF3 VRPhi BRD_CLKDRV0 CLKDRV_DAC2_HI 5000 5000 1000 5000 BRD_CLKDRV0 CLKDRV_DAC3_LO -5000 -5000 1000 -5000 #RF2L VRPhi BRD_CLKDRV0 CLKDRV_DAC3_HI 5000 5000 1000 5000 BRD_CLKDRV0 CLKDRV_DAC4_LO -5000 -5000 1000 -5000 #RF1L VRPhi BRD_CLKDRV0 CLKDRV_DAC4_HI 5000 5000 1000 5000 BRD_CLKDRV0 CLKDRV_DAC5_LO -5000 -5000 1000 -5000 #RF2R VRPhi BRD_CLKDRV0 CLKDRV_DAC5_HI 5000 5000 1000 5000 BRD_CLKDRV0 CLKDRV_DAC6_LO -5000 -5000 1000 -5000 #RF1R VRPhi BRD_CLKDRV0 CLKDRV_DAC6_HI 5000 5000 1000 5000 BRD_CLKDRV0 CLKDRV_DAC7_LO -6000 -6000 1000 -6000 #DG VDG BRD_CLKDRV0 CLKDRV_DAC7_HI 6000 6000 1000 6000 # # CONNECTOR PO-B # BRD_CLKDRV0 CLKDRV_DAC8_LO -12000 -4000 1000 -7000 #IF1 VIPhi BRD_CLKDRV0 CLKDRV_DAC8_HI -2000 3000 1000 3000 BRD_CLKDRV0 CLKDRV_DAC9_LO -12000 -4000 1000 -7000 #IF2 VIPhi BRD_CLKDRV0 CLKDRV_DAC9_HI -2000 3000 1000 3000 BRD_CLKDRV0 CLKDRV_DAC10_LO -12000 -4000 1000 -7000 #IF3 VIPhi BRD_CLKDRV0 CLKDRV_DAC10_HI -2000 3000 1000 3000 BRD_CLKDRV0 CLKDRV_DAC11_LO -0000 -0000 1000 -0000 #empty BRD_CLKDRV0 CLKDRV_DAC11_HI 0000 0000 1000 0000 BRD_CLKDRV0 CLKDRV_DAC12_LO -6000 -4000 1000 -6000 #FRL BRD_CLKDRV0 CLKDRV_DAC12_HI 6000 8000 1000 6000 BRD_CLKDRV0 CLKDRV_DAC13_LO -6000 -4000 1000 -6000 #FRR BRD_CLKDRV0 CLKDRV_DAC13_HI 6000 8000 1000 6000 # # Gain should be interpreted as follows # There are two gains, gain1 is on the preamp, gain2 is on the video board. # Gain1 = # 3 == 1.5 # 1 == 2.25 # 0 == 3.0 # # Gain2 = # 0 = Minimum (2.5) # 1 = Maximum (12.5) # # BRD_ID PERIPH_ID LOW HIGH TOLERANCE INIT_VAL BRD_VIDBRD0 VID_GAIN1_CHAN0 0 3 0 1 BRD_VIDBRD0 VID_GAIN1_CHAN1 0 3 0 1 BRD_VIDBRD0 VID_GAIN1_CHAN2 0 3 0 1 BRD_VIDBRD0 VID_GAIN1_CHAN3 0 3 0 1 BRD_VIDBRD0 VID_GAIN2_CHAN0 0 1 0 0 BRD_VIDBRD0 VID_GAIN2_CHAN1 0 1 0 0 BRD_VIDBRD0 VID_GAIN2_CHAN2 0 1 0 0 BRD_VIDBRD0 VID_GAIN2_CHAN3 0 1 0 0 BRD_VIDBRD0 VID_FILT_CHAN0 0 3 0 0 BRD_VIDBRD0 VID_FILT_CHAN1 0 3 0 0 BRD_VIDBRD0 VID_FILT_CHAN2 0 3 0 0 BRD_VIDBRD0 VID_FILT_CHAN3 0 3 0 0 BRD_VIDBRD0 VID_TESTVID_CHAN0 0 1 0 0 BRD_VIDBRD0 VID_TESTVID_CHAN1 0 1 0 0 BRD_VIDBRD0 VID_TESTVID_CHAN2 0 1 0 0 BRD_VIDBRD0 VID_TESTVID_CHAN3 0 1 0 0 # # Video Offsets are in 0.001 volts # # BRD_ID PERIPH_ID LOW HIGH TOLERANCE INIT_VAL # BRD_VIDBRD0 VID_OFFSET_CHAN0 0 65535 6553 0 BRD_VIDBRD0 VID_OFFSET_CHAN1 0 65535 6553 0 BRD_VIDBRD0 VID_OFFSET_CHAN2 0 65535 6553 0 BRD_VIDBRD0 VID_OFFSET_CHAN3 0 65535 6553 0
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