Rachel: ESO CCD Test report

EEV 44-82
CCD name : Rachel
Serial number : 8462-10-2
Type : Backside, Single layer AR Pixel size 15x15 µm
Number of photosensitive pixels 2048 x 4102 [HxV]
Number of outputs : 2
Overall rating : ---

Tested in August 2000

 

Quantum Efficiency, PRNU


      
Conversion Factor=   0.531e-/ADU ±0.001     for 20736.6ADU                                                                  
RMS noise        =   4.1e-       ±0.2

CCD temperature : -135Cº


Window area is : X1= 61 X2= 2028 Y1= 11 Y2= 506
Bandwidth 5nm

Wav.       PRNU rms%       QE%                     Enthropy                                                                                          
320        4.49            54       ±1.5           7.545318                                                                                         
330        4.3             58.4     ±1.7           7.50145                                                                                          
340        4.21            63       ±1.2           7.480298                                                                                         
350        4.21            64.4     ±0.63          7.476821                                                                                         
360        4.07            66.7     ±0.66          7.443438                                                                                         
370        3.66            69.9     ±0.69          7.337103                                                                                         
380        2.76            75.2     ±0.74          7.05684                                                                                          
390        2.07            80.4     ±0.83          6.765366                                                                                         
400        1.67            82.6     ±0.84          6.549568                                                                                         
440        1.09            85.4     ±0.86          6.09861                                                                                          
460        1               84.3     ±0.85          6.013783                                                                                         
500        0.909           83.1     ±0.83          5.909189                                                                                         
540        0.912           81       ±0.82          5.911546                                                                                         
560        0.913           79.7     ±0.8           5.912072                                                                                         
600        0.938           78.1     ±0.77          5.941142                                                                                         
640        1.05            75.9     ±0.74          6.061024                                                                                         
660        1.14            74.1     ±0.72          6.152392                                                                                         
700        1.49            69.6     ±0.65          6.423616                                                                                         
740        2.16            63.3     ±0.58          6.774507                                                                                         
760        2.27            59       ±0.53          6.840842                                                                                         
800        2.36            50       ±0.43          6.887156                                                                                         
840        2.64            41       ±0.36          7.001454                                                                                         
860        2.69            35.4     ±0.3           7.026459                                                                                         
900        3.61            27.6     ±0.22          7.29979                                                                                          
940        5.09            16       ±0.12          7.641191                                                                                         
960        5.66            11.7     ±0.09          7.747641                                                                                         
1000       7.66            4.65     ±0.035         8.039768                                                                                         
1040       8.3             0.805    ±0.006         8.141162                                                                                         
1100       11.4            0.0981   ±0.00073       8.392152                                                                                                                 
                                                                                                         


Cosmetic Defects

 

Flat Field

350 nm (UV), bandwidth 5 nm


High level


Low level

 

600 nm, bandwidth 5 nm


High level


Low level

 

900 nm, bandwidth 5 nm


High level


Low level

Type of defect Location (x,y) Number of pixels affected
Hot pixel (947, 785),(804, 882),(842, 985),(1136, 3397),(2037, 1) 3000*7+800*2+4000

 

 

Bias





Type of defect Location Number of pixels affected
Hot pixel (947, 785),(804, 882),(842, 985),(1136, 3397),(2037, 1) 3000*7+800*2+4000
   

Long exposure dark image

Type of defect Location Number of pixels affected
Hot pixel (947, 785),(804, 882),(842, 985),(1136, 3397),(2037, 1) 3000*7+800*2+4000
 




Readout Noise/Conversion Factor

 



Readout speed: 225kps
Conversion Factor=   0.531e-/ADU  ±0.001     for 20633.2ADU                                                                  
RMS noise        =   4.1e-        ±0.2                                                                                       

Readout speed: 50kps
Conversion Factor=   0.550e-/ADU ±0.001     for 27241.8ADU                                                                  
RMS noise        =   2.7e-       ±0.1                 

 
 

Linearity (TDI method)



RMS non linearity (%)         =    0.29
Peak to peak non linearity (%)=    0.94









Dark Current

  


Exposure time (s) =  3600
Dark current : 0.4 ± 0.2 e-/hour/pixel
Cosmic event rate : 1.6 ± 0.2 events/min/cm²
  
  

Charge Transfer Efficiency (CTE)

 


Horizontal CTE = 0.9999981
Vertical CTE   = 0.9999995


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