Feros Homepage

CCD detector and Continuous Flow Cryostat

The detector foreseen is a monolithic, thinned and back-illuminated 2048x4096 15 micron pixel CCD manufactured by EEV and integrated by the Astronomical Instrument Centre at the AOC. The first scientific grade versions of this device will be available in November 1997. Up to that time a 2048x4096 13.5 micron pixel engineering grade version will be used for integration into the dewar and adaptation of the electronics. Click here to get some performance details on this type of chips measured at the Royal Greenwich Observatory (RGO).
The two images show a 13.5 micron chip (EEV 5244/37/8-42-80) in its dewar at RGO; on the right the measured quantum-efficiency curve.

The CCD characteristics for the ESO EEV chips is given in the following table:

Op. temperature -110 to -120 C

RON 3 electrons for 50 kpix/sec/port

Dark Current 4 electrons/h/pixel

CTE (par/ser) 0.99999/0.99999

Linearity <1% deviation up to full well

Full well capacity 150.000 electrons

Read-out time 60 sec through 2 channels

The quantum efficiency for the ESO EEV chips is given here (throughout this homepage, the figures for he guaranteed minimum are assumed) The science grade chip has been delivered at mid-June 1998. Therefore, we also give now the QE measured by EEV. For the most recent measurements at the AOC of the QE at operating temperature see the last column. For further characterization measurements for the final FEROS Science CCD follow this link to Anton Norup Soerensen's FEROS page

wavelength[nm] Guaranteed QE[%] Goal QE[%] Measured QE[%](EEV) Measured QE @ -100C [%](AOC)
320 22 50 50

350 50 65 51 60

375 58 72 72

400 72 78 85 93

450 85 85 98

500 85 85 95 98

600 85 85 90

650 87 80

700 78 80 75

800 50 70 50

900 28 50 28 27

1000 5 15 10

wavelength[nm]	Guaranteed QE[%]	Goal QE[%]	Measured QE[%](EEV)	Measured QE @ -100C [%](AOC)
320	22	50		50
350	50	65	51	60
375	58	72		72
400	72	78	85	93
450	85	85		98
500	85	85	95	98
600	85	85		90
650			87	80
700	78	80		75
800	50	70		50
900	28	50	28	27
1000	5	15		10

The FEROS continuous flow dewar by ESO is shown in the next picture.

[Rainbowline]

If you have any comments on the FEROS project, please send me a mail .

FEROS homepage / A.Kaufer@lsw.uni-heidelberg.de

Last modified: Fri Jan 26 10:02:37 MET 2001

Op. temperature	-110 to -120 C
RON	3 electrons for 50 kpix/sec/port
Dark Current	4 electrons/h/pixel
CTE (par/ser)	0.99999/0.99999
Linearity	<1% deviation up to full well
Full well capacity	150.000 electrons
Read-out time	60 sec through 2 channels