EEV 44-82 -1-A57
CCD name : Carina
Serial number :
9331-05-02
Type : Backside, Single layer AR Pixel size 15x15 µm
Number of photosensitive pixels 2048 x 4102 [HxV]
Number of
outputs : 2
Overall rating :
Test date : March 16th to the March 27th 2001
Clock mode: EEV 1p/225k/HG 512 Conversion Factor= 0.5228e-/ADU ±0.002727 for 23995ADU RMS noise = 4.0181e- ±0.1155 CCD temperature : -120Cº Window area is : X1= 61 X2= 1929 Y1= 2 Y2= 507 Bandwidth 5nm Wav. QE% PRNU rms% Enthropy 320 62.6 ±1.8 3.54 7.299285 330 67.8 ±2 3.42 7.26366 340 70.7 ±1.4 3.39 7.25477 350 71.4 ±0.7 3.43 7.267815 360 72.8 ±0.72 3.39 7.25838 370 74.8 ±0.74 3.06 7.156792 380 78.7 ±0.78 2.34 6.888616 390 82.8 ±0.85 1.82 6.63614 400 84.2 ±0.82 1.5 6.443 420 85.1 ±0.86 1.23 6.23477 440 85.1 ±0.85 1.06 6.082013 460 83.7 ±0.84 1.02 6.044143 480 82.4 ±0.83 1 6.024894 500 81.9 ±0.82 0.999 6.023648 520 81.3 ±0.82 0.966 5.988377 540 80.1 ±0.81 0.949 5.968955 560 78.7 ±0.79 0.933 5.951174 580 78.4 ±0.78 0.954 5.974551 600 77.2 ±0.76 0.955 5.976113 620 76.3 ±0.75 0.969 5.99051 640 75.2 ±0.73 0.949 5.9671 660 73.4 ±0.71 0.964 5.983034 680 71.6 ±0.68 0.981 6.000998 700 68.9 ±0.64 1.09 6.106697 720 66.3 ±0.61 1.27 6.243844 740 62.8 ±0.57 1.52 6.420856 760 58.7 ±0.53 1.63 6.471057 780 54.8 ±0.48 1.59 6.454396 800 50.1 ±0.43 1.57 6.465658 840 42 ±0.35 1.51 6.437607 900 27.8 ±0.22 1.96 6.696688 940 17.3 ±0.13 3.82 7.348708 1000 4.6 ±0.035 7.37 7.935513 1040 0.81 ±0.006 7.19 7.959679 1100 0.102 ±0.00076 9.44 8.284199
Table 1: Measurement of the Quantum Efficiency.
Figure 1: Graphic representation of the QE.
Figure 2: Graphic representation of the PRNU.
In this section you can compare the QE we measured with the testbench and
QE Minimum specification
Typical QE
QE from Marconi
Figure 3: Comparison between the QE measured by ESO, the QE measured by Marconi,
ESO specification and minimum specification.
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Comparison QE ESO / QE Marconi |
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|
Wavelength (nm) |
QE ESO (%) |
QE Marconi (%) |
Difference (Eso - Marc. %) |
Relative difference (Marconi as reference %) |
|
350 |
71.4 |
59 |
12.4 |
21 |
|
400 |
84.2 |
81.3 |
2.9 |
3.6 |
|
500 |
81.9 |
81.3 |
0.6 |
0.7 |
|
650 |
74.3 |
74 |
0.3 |
0.4 |
|
900 |
27.8 |
28.7 |
-0.9 |
-3.1 |
Table 2: Difference and relative difference between ESO measurement and Marconi.
Figure 4: Graphic representation of the difference and the relative difference.
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 |
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High level |
Low level |
High level |
Low level |
High level |
Low level |
Table 3: Flat field for three wavelengths.
The time exposure, for the long dark exposure, is 3600 seconds.
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Bias |
Long exposure dark image |
|---|---|
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Table 4: Bias and dark.
Clock mode: EEV 1p/225k/HG 512 Conversion Factor= 0.52158e-/ADU ±0.001186 for 25797.6ADU RMS noise = 4.0139e- ±0.1941
RMS non linearity (%) =0.28 Peak to peak non linearity (%)=0.86
Figure 5: Error of linearity
Figure 6: Residual non linearity.
Exposure time (s) = 3600 Dark current : / e-/hour/pixel
Horizontal CTE = 0.999996 Vertical CTE = 0.9999996
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: 321 hot points.
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Position |
Image |
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6 3431 46 3436 47 3436 48 3436 58 3436 1662 3504 2 3516 32 3518 32 3520 32 3521 32 3525 11 3526 12 3526 13 3526 14 3526 15 3526 16 3526 17 3526 18 3526 19 3526 20 3526 21 3526 22 3526 23 3526 24 3526 25 3526 26 3526 27 3526 28 3526 29 3526 30 3526 31 3526 32 3526 33 3526 34 3526 35 3526 36 3526 37 3526 38 3526 39 3526 40 3526 41 3526 42 3526 43 3526 44 3526 45 3526 46 3526 47 3526 49 3526 50 3526 51 3526 53 3526 32 3528 32 3529 34 3529 1502 3529 32 3530 34 3530 32 3531 32 3532 32 3533 31 3537 34 3537 36 3537 39 3537 41 3537 43 3537 53 3537 54 3537 62 3537 109 3563 110 3563 111 3563 112 3563 113 3563 114 3563 115 3563 116 3563 |
117 3563 118 3563 119 3563 120 3563 121 3563 123 3563 124 3563 126 3563 127 3563 128 3563 129 3563 130 3563 132 3563 133 3563 137 3563 1699 3566 177 3590 178 3590 180 3590 181 3590 183 3590 184 3590 185 3590 186 3590 187 3590 188 3590 189 3590 191 3590 192 3590 193 3590 195 3590 196 3590 197 3590 198 3590 199 3590 200 3590 204 3590 205 3590 209 3590 211 3590 214 3590 217 3590 539 3590 181 3591 249 3602 249 3609 251 3609 249 3610 251 3610 267 3610 249 3611 251 3611 267 3611 249 3612 251 3612 267 3612 267 3613 267 3614 267 3615 249 3617 251 3617 249 3618 267 3623 326 3635 304 3636 305 3636 306 3636 307 3636 326 3640 328 3640 326 3641 328 3641 326 3642 328 3642 326 3646 328 3646 326 3647 326 3648 |
328 3648 326 3649 326 3650 326 3652 338 3653 346 3658 347 3658 361 3658 364 3658 372 3658 389 3668 389 3670 389 3671 389 3672 389 3675 436 3695 77 3774 250 3814 250 3816 279 3824 325 3843 455 3890 455 3895 455 3897 477 3906 478 3906 479 3906 480 3906 481 3906 482 3906 483 3906 484 3906 485 3906 486 3906 487 3906 490 3906 500 3912 500 3915 301 3944 302 3944 303 3944 304 3944 305 3944 308 3944 309 3944 310 3944 312 3944 313 3944 314 3944 318 3944 319 3944 320 3944 573 3944 590 3961 593 3961 595 3961 389 3971 391 3971 396 3971 634 3978 634 3981 628 3982 634 3982 634 3984 634 3988 634 3989 634 3990 634 3991 634 3992 797 4001 500 4008 500 4013 687 4018 810 4018 811 4018 812 4018 813 4018 814 4018 |
815 4018 816 4018 817 4018 818 4018 819 4018 820 4018 821 4018 822 4018 823 4018 824 4018 825 4018 826 4018 827 4018 828 4018 692 4026 826 4026 840 4026 870 4046 870 4047 872 4047 870 4049 870 4052 872 4052 870 4053 634 4063 634 4064 634 4065 634 4066 634 4067 634 4069 634 4070 634 4071 340 4072 634 4072 634 4073 634 4074 945 4087 945 4088 430 4095 950 4096 953 4096 684 4101 685 4101 687 4101 688 4101 690 4101 799 4102 800 4102 801 4102 802 4102 805 4102 806 4102 807 4102 808 4102 809 4102 810 4102 811 4102 812 4102 813 4102 814 4102 815 4102 816 4102 817 4102 818 4102 819 4102 820 4102 821 4102 822 4102 823 4102 824 4102 825 4102 826 4102 827 4102 |
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1444 598 |
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1220 1083 1222 1083 |
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2000 1510 |
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848 1658 |
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781 1993 781 1994 |
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1243 2096 |
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129 2526 137 2526 138 2526 |
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1132 3262 |
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1818 3300 |
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1869 3356 |
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Table 5: Position and images of the hot pixels.
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: 0 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: Not available
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: Not available.
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: 6 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 |
321 |
0 |
/ |
/ |
/ |
0 |
6 |
|
Marconi |
239 |
6 |
7 |
0 |
6 |
12 |
|
Table 6: Summary of cosmetic defects.
Be careful, in the ESO test report we didn't include the very large trap in the total bad column because for this ccd we couldn't measure this parameter.
Back to the overview page ESO Test Reports for the OmegaCAM CCDs
