CAT / CES Long / CCD Lo #34

TYPE Loral 2048
Front-illuminated, UV coated

IMAGE SIZE [pixels] 2048 x 2048 (16 prescan pixels)

PIXEL SIZE [microns] 15 x 15

DARK CURRENT [e- / px / hr] 11.8 at 161 °K

FULL WELL CAPACITY [e- / px ] 187k

CONTROLLER ESO VME

Mode slow [16 kpixel / sec] fast [33 kpixel / sec]

R.O.N. [e- rms] 4.7 5.3

CONVERSION FACTOR [e-/ADU] 1.41 1.35

Full Frame READOUT TIME [s] 87 (100x2060 px) 80 (100x2060 px)

On a low level flats the following defects were noticed:
Positions of blemishes

 
---------------------------
 X      Y   Description
---------------------------
966    141  small trap 
960    317  small trap 
1086   368  trap 
1083   363  trap 
904    339  trap 
953    394  trap
1039   440  dark pixel
1054   456  small trap 
1044   470  dark pixel 
1095   561  small trap
1035   622  dark pixel 
979    696  dark pixel 
919    942  small trap 
1084   982  large dust particle
975   1031  dark pixel 
941   1139  small trap
950   1190  small trap 
996   1404  small trap 
931   1421  dark pixel
916   1417  small trap
923   1446  dark pixel 
976   1610  small trap 
927   1682  dark pixel 
962   1793  large dust particle

     lambda (nm)   QE (%)
         320        18.9
         340       18.43
         360       18.19
         380       18.06
         400       19.03
         450       18.37
         500       32.06
         550       39.62
         600       45.67
         650       48.08
         700       49.02
         750       46.59
         800       42.49
         850       32.35
         900       20.16
         950        9.95
        1000         3.2

History

This detector system is linear to better 1% over the full dynamic range of the 16 bit analog-to-digital converter (ADC). The electronics have been tuned so that the ADC will saturate before non-linearity is reached.

Date of delivery at the telescope:
Date of last set of tests: August 23, 1997

Comment on the last test: This CCD is remarkably stable. Almost no change in one year.

Previous test: October 27, 1996
DARK CURRENT [e- / px / hr] 8.8 at 161 °K

Mode slow [16 kpixel / sec] fast [33 kpixel / sec]

R.O.N. [e- rms] 4.7 5.3

CONVERSION FACTOR [e-/ADU] 1.41 1.35

Previous test: October 10, 1994
DARK CURRENT [e- / px / hr] ~12.3 at 161 °K

Mode slow [16 kpixel / sec] fast [33 kpixel / sec]

R.O.N. [e- rms] 5.5 6.5

CONVERSION FACTOR [e-/ADU] 1.32 2.77

**Previous test:** October 27, 1996
DARK CURRENT [e- / px / hr]	8.8 at 161 °K
Mode	slow [16 kpixel / sec]	fast [33 kpixel / sec]
R.O.N. [e- rms]	4.7	5.3
CONVERSION FACTOR [e-/ADU]	1.41	1.35

**Previous test:** October 10, 1994
DARK CURRENT [e- / px / hr]	~12.3 at 161 °K
Mode	slow [16 kpixel / sec]	fast [33 kpixel / sec]
R.O.N. [e- rms]	5.5	6.5
CONVERSION FACTOR [e-/ADU]	1.32	2.77

Charge Transfer Efficiency

Serial CTE:0.9999991
Parallel CTE:0.999997

Full Well Capacity

Upper limit of linearity: 187k e-/pixel
Saturation-value: 216k e-/pixel

Cosmic Ray Event

The cosmic ray event rate is 2.94 [events / min / cm ²]

Shutter Error

Slow mode: 0.05 sec
Fast mode: 0.05 sec

Image Files

TYPE	Loral 2048
	Front-illuminated, UV coated
IMAGE SIZE [pixels]	2048 x 2048 (16 prescan pixels)
PIXEL SIZE [microns]	15 x 15
DARK CURRENT [e- / px / hr]	11.8 at 161 °K
FULL WELL CAPACITY [e- / px ]	187k
CONTROLLER	ESO VME
Mode	slow [16 kpixel / sec]	fast [33 kpixel / sec]
R.O.N. [e- rms]	4.7	5.3
CONVERSION FACTOR [e-/ADU]	1.41	1.35
Full Frame READOUT TIME [s]	87 (100x2060 px)	80 (100x2060 px)

CAT / CES Long / CCD Lo #34

lambda (nm) QE (%) 320 18.9 340 18.43 360 18.19 380 18.06 400 19.03 450 18.37 500 32.06 550 39.62 600 45.67 650 48.08 700 49.02 750 46.59 800 42.49 850 32.35 900 20.16 950 9.95 1000 3.2