Grus: ESO CCD Test report

EEV 44-82 -1-A57
CCD name : Grus
Serial number : 00152-05-01
Type : Backside, Single layer AR Pixel size 15x15 µm
Number of photosensitive pixels 2048 x 4102 [HxV]
Number of outputs : 2
Overall rating :

Measurement made by Fabrice Christen the: 23-26 of November 2001.
Data reduced by Fabrice Christen the: November 14th, 2001

Quantum Efficiency, PRNU

Clock mode: 225kpx/rr/HG/512
Conversion Factor=   0.52478e-/ADU ±0.001422     for 24679.4ADU                                                                  
RMS noise        =   4.1153e-      ±0.1986                                                                                       

CCD temperature : -120Cº

Window area is : X1= 89 X2= 2090 Y1= 3 Y2= 510
Bandwidth 5nm

Wav.

Qe Grus

Error

PRNU RMS (%)

Phase

320

39.5

1.1

4.19

6.76

330

44.4

1.3

3.96

6.7

340

46.9

0.92

3.87

6.68

350

48.1

0.47

3.89

6.68

360

50.3

0.5

3.87

6.68

370

55.1

0.54

3.49

6.58

380

63.8

0.63

2.61

6.3

390

71.4

0.73

2.07

6.08

400

75.3

0.76

1.79

5.94

420

78.6

0.79

1.59

5.82

440

80.2

0.8

1.54

5.79

450

80

0.8

0

5.77

460

79.7

0.8

1.48

5.75

480

79

0.79

1.45

5.73

500

79

0.79

1.43

5.72

520

78.6

0.79

1.42

5.71

540

77.5

0.78

1.41

5.71

550

77

0.77

0

5.73

560

76.4

0.76

1.47

5.75

580

76.3

0.76

1.41

5.71

600

75.4

0.75

1.41

5.71

620

74.9

0.74

1.42

5.72

640

74.3

0.72

1.42

5.72

650

73.7

0.72

0

5.74

660

73.1

0.71

1.46

5.75

680

71.9

0.69

1.43

5.73

700

69.3

0.65

1.48

5.77

720

66.3

0.61

1.57

5.82

740

62.9

0.57

1.59

5.84

750

61

0.55

0

5.84

760

59.1

0.53

1.6

5.84

780

55.6

0.49

1.62

5.86

800

51.7

0.45

1.65

5.88

820

48.3

0.41

1.61

5.85

840

44.2

0.37

1.6

5.84

850

41.95

0.35

0

5.84

860

39.7

0.33

1.58

5.83

880

34.5

0.28

1.76

5.94

900

29.3

0.24

2.29

6.2

920

23.4

0.18

3.51

6.59

940

17.6

0.14

4.9

6.87

950

15.2

0.12

0

6.97

960

12.7

0.1

6.03

7.07

980

8.14

0.06

7.41

7.22

1000

4.7

0.04

8.24

7.3

1040

0.82

0.01

7.9

7.35

1100

0.09

0

9.56

7.62

 

Table 1: Measurement of the Quantum Efficiency.


Quantum efficiency,
comparison


In this
section you can compare the QE we measured with the testbench and: 





	
	
	
		

			
				

					
			
				

					
		

	
	
		

			
				

				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.

					
		

	









Quantum efficiency, special specification



	

		

			

				

				

					
					
					
					
					

						
							
Special specification

								
					

					

						
							
Wavelength(nm)

								
						
							
Minimum spec. (%)

								
						
							
ESO measurements (%)

								
						
							
Result

								
					

					

						
							
350

								
						
							
50

								
						
							
48.1

								
						
							
Under the minimum spec.

								
					

					

						
							
400

								
						
							
80

								
						
							
75.3

								
						
							
Under the minimum spec.

								
					

					

						
							
650

								
						
							
80

								
						
							
73.7

								
						
							
Under the minimum spec.

								
					

					

						
							
900

								
						
							
25

								
						
							
29.3

								
						
							
OK

								
					

					

						
							
Conclusion:

								
						
							
No, this CCD is not in the 25 %

								
					

				

			

		

	




Table 2:
Minimum specification for 25 % of the CCDs.


Difference between QE measurements made by ESO and Marconi.









	

		

			

				

				

					
					
					
					
					
					
					

						
							
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

								
						
							
48.1

								
						
							
59.5

								
						
							
-11.4

								
						
							
-19.2

								
						
							
0.81

								
					

					

						
							
400

								
						
							
75.3

								
						
							
87.8

								
						
							
-12.5

								
						
							
-14.2

								
						
							
0.86

								
					

					

						
							
500

								
						
							
79

								
						
							
90.9

								
						
							
-11.9

								
						
							
-13.1

								
						
							
0.87

								
					

					

						
							
650

								
						
							
73.7

								
						
							
85.3

								
						
							
-11.6

								
						
							
-13.6

								
						
							
0.86

								
					

					

						
							
900

								
						
							
29.3

								
						
							
29.4

								
						
							
-0.1

								
						
							
-0.3

								
						
							
1.00

								
					

				

			

		

	




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

					
		

	










PRNU


In this
section you can compare the PRNU we measured at ESO and: 











	
	
	
		

			
				

					
			
				

					
		

	
	
		

			
				
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

										
								
									
4.19

										
								
									
6

										
								
									


									

										
								
									


									

										
								
									


									

										
								
									


									

										
							

							

								
									
350

										
								
									
3.89

										
								
									
5

										
								
									
4.8

										
								
									
-0.91

										
								
									
-18.96

										
								
									
0.81

										
							

						
						
							

								
									
400

										
								
									
1.79

										
								
									
2.5

										
								
									
1.7

										
								
									
0.09

										
								
									
5.29

										
								
									
1.05

										
							

						
						
							

								
									
500

										
								
									
1.43

										
								
									
2

										
								
									
1.2

										
								
									
0.23

										
								
									
19.17

										
								
									
1.19

										
							

						
					

				

			

		

	




Table 4: Difference
and relative difference between ESO measurements and Marconi.


Comparison with the contract


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

												
										
											
Below the specification

												
										
											
OK

												
									

									

										
											
360

												
										
											
OK

												
										
											


											

												
									

									

										
											
380

												
										
											
Below the specification

												
										
											


											

												
									

									

										
											
400

												
										
											
OK

												
										
											
OK

												
									

									

										
											
450

												
										
											
Below the specification

												
										
											
OK

												
									

									

										
											
500

												
										
											
Below the specification

												
										
											
OK

												
									

									

										
											
550

												
										
											
Below the specification

												
										
											


											

												
									

									

										
											
600

												
										
											
Below the specification

												
										
											


											

												
									

									

										
											
650

												
										
											
Below the specification

												
										
											


											

												
									

									

										
											
700

												
										
											
OK

												
										
											


											

												
									

									

										
											
750

												
										
											
OK

												
										
											


											

												
									

									

										
											
800

												
										
											
OK

												
										
											


											

												
									

									

										
											
850

												
										
											
OK

												
										
											


											

												
									

									

										
											
900

												
										
											
OK

												
										
											


											

												
									

									

										
											
950

												
										
											
OK

												
										
											


											

												
									

									

										
											
1000

												
										
											
Below the specification

												
										
											


											

												
									

								

							

						

					

				

			

		

	




Table 5: Comparison between the values we have
measured and the specifications in the contract.


Cosmetic


Flat Field


For the flat field we use three wavelengths, 350 nm, 600 nm and
900 nm. For each wavelength we make two images, high level (45000 ADU)
and low level (1000 ADU).



	
	
	
	
	
	
	
		

			
				
350 nm (UV), bandwidth
				5 nm

					
			
				
600 nm, bandwidth 5 nm

					
			
				
900 nm, bandwidth 5 nm

					
		

	
	
		

			
				

					
			
				

					
			
				

					
			
				

					
			
				

					
			
				

					
		

		

			
				

				High level

					
			
				

				Low level

					
			
				

				High level 
				

					
			
				

				Low level

					
			
				

				High level

					
			
				

				Low level

					
		

	



Table 6: Flat field for three wavelengths.


Bias and Dark


The time exposure, for the long dark exposure, is 3600 seconds.



	

		

			

				

					

						

							

								

									

										

											

											

												
												
												
													

														
															
Bias

																
														
															
Long exposure dark image

																
													

												
												
													

														
															

																
														
															

																
													

												
											

										

									

								

							

						

					

				

			

		

	




Table
7: Bias and dark.


Remark: As you can see on the dark image we
have on this CCD some electroluminescence (two white spots below).


Readout
noise/Conversion factor


Clock mode: 50kpx/rlrl/HG/512
CCD A Grus Left port
Conversion Factor=   0.48818e-/ADU ±0.001868     for 20675.3ADU
RMS noise        =   2.8929e-      ±0.1496

CCD A Grus Right port
Conversion Factor=   0.50895e-/ADU ±0.001582     for 20084.9ADU
RMS noise        =   2.9605e-      ±0.172

Clock mode: 225kpx/rlrl/HG/512
CCD A Grus Left port
Conversion Factor=   0.50422e-/ADU ±0.001937     for 20643.5ADU
RMS noise        =   4.0035e-      ±0.201
CCD A Grus Right port
Conversion Factor=   0.52523e-/ADU ±0.001482     for 19986.9ADU
RMS noise        =   4.6631e-      ±0.2246


Linearity (TDI method)


RMS non linearity (%)         =  0.24
Peak to peak non linearity (%)=  0.72









Figure
9: Error of linearity




Figure
10: Residual non linearity.


Dark current


Exposure time (s) = 3600
Temperature = -120 Deg.

Dark current : 1.95 ± 0.07 ADU/hour/pixel
Dark current : 1.1 ± 0.04 e-/hour/pixel

Charge Transfer Efficiency (CTE) Not available


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

Cosmetic defects


In this section we expose
the hot pixel, the dark pixel, the trap and the very large trap we
found.


Hot pixel


A hot pixel provides
a signal of > 60 e- / pixel / hour.







Result:
0 hot points.


Very bright pixel


a very bright pixel provides
a signal of > 200000 e-/pixel/hour







Result: 0 very bright
pixel.


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.







Result: 1 dark pixels
detected.


Trap


A trap is defined as
a pixel that captures more than 10 electrons, measured with a flat
field level around 500 photo-electrons.







Result: 11 trap


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.







Result: 0 very large trap.







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.







Result: 1 bad columns.


Conclusion


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

									
							
								
0

									
							
								
1

									
							
								
0

									
							
								
11

									
							
								
0

									
							
								
1

									
							
								
1

									
						

						

							
								
Marconi

									
							
								
35

									
							
								
9

									
							
								
7

									
							
								
0

									
							
								
5

									
							
								
14

									
						

					
				

			

		

	




Table 8: 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.


Voltage table


###############################################################################
#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      -3000   #OG1R  VOG1
BRD_ANABIAS0 ANB_PRESET_VOLT_B   -2500   -1000       10000      -2000   #OG2R  VOG2
BRD_ANABIAS0 ANB_PRESET_VOLT_C    2000   25000       10000      20000   #ODR   VOD
BRD_ANABIAS0 ANB_PRESET_VOLT_D    2000   15000       10000      11000   #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      -3000   #OG1L  VOG1
BRD_ANABIAS0 ANB_PRESET_VOLT_J   -2500   -1000       10000      -2000   #OG2L  VOG2
BRD_ANABIAS0 ANB_PRESET_VOLT_K    2000   25000       10000      20000   #ODL   VOD
BRD_ANABIAS0 ANB_PRESET_VOLT_L    2000   15000       10000      11000   #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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ESO Test Reports for the OmegaCAM CCDs