This document contains a summary of the specifications and the testing of the 6dF Flair Spectrograph camera. This document is available online at http://www.mso.anu.edu.au/observing/. Follow the links: Computing and other resources, Detector Lab, CCD Detector Controllers and Instruments, CCD Systems, CCD102.

A list of images contained in the data pack is given in Chapter 9.

2. CCD Specifications

CCD Name	CCD11
Serial Number	8492-14-11
Engineering chip Description	CCD47-10-1 Marconi 1024x1024 Thinned Back illum. Grade 1, astronomy BB coating, AIMO
Science Chip Description	CCD47-10-1 Marconi 1024x1024 Thinned Back illum. Grade 0, astronomy BB coating, AIMO
Pixel Size(micron)	13umx13um
Chip size	1056x1027
Preflash, e-	None
Readout Mode	MPP	NON-MPP
Dark Current (e/px/s @ 20 Deg C)	250
Full Well Capacity [e/px]	90000

Table 1: CCD Specifications

2.1. Manufacturers Data Sheet

More detailed information can be viewed in the Manufacturer’s Data Sheet .

3. Cosmetics

Dark Signal non-uniformity defects	Bright columns	0
Dark Signal non-uniformity defects	Point Defects	3
Photon Response non-uniformity defects	Total columns	0
	Dark point defects	31
	Traps	0

Table 2: Cosmetics

4. SDSU2 Controller Performance

Left Amplifier

Characteristic	Amplifier Left
Readout Speed	slow	medium	fast
Noise (e-/RMS)	2.7	2.75	3.9
Gain (e-/ADU)	0.33	0.64	1.3
Full Frame READOUT TIME [secs]	42	24	11
Linearity 0.5% [ke]		42
Saturation [ke]		42
Control Temperature [K]	170.0
Dark Current [e/px/hr] at 170K	0.79

Table 3: Controller Performance

5. Charge Transfer Efficiency

The measured charge transfer efficiency values are shown in the table below.

No of counts	HCTE %	VCTE %	Images

1000	100.0002	99.99994	cte1thou0001red
10000	99.99979	99.99998	cte10thou0001red
50000	99.99981	99.99996	cte50thou0001red

Table 4: VCTE and HCTE measurements at various counts

6. Quantum Efficiency

6.1. Absolute QE

Wavelength	Quantum Efficiency
350nm	39.5%
400nm	74.9%
500nm	80.1%
650nm	75.4%
900nm	33.2%

Table 5: Data sheet Quantum Efficiency values

6.2. Relative QE

The following measurements show that the QE doesn’t vary over 150-184 K at 690nm.

Temp (K)	Wavelength Nm	Average Signal ADU	Date taken	Image names

170	690	8860	22/11	qe0001_170K, qe0002_170K
178.8	690	8875	22/11	qe0001_180K, qe0002_180K
184	690	8870	22/11	qe0001_184K, qe0002_184K
170	690	8850	22/11	qe0003_170K, qe0004_170K
150	690	8740	23/11	qe0001_150K, qe0002_150K
160	690	8770	23/11	qe_0001_160K,qe0002_160k
170	690	8770	23/11	qe0005_170K, qe0006_170K

Table 6: Relative QE measurements

The average signal is stable enough (on a given day) to conclude that the QE has no significant temperature dependence at 690nm over the above range. This is bearing in mind that the shot noise of the signals is the square root of the average signal, ~95 ADU’s.

7. Linearity

The non- linearity was determined to < 0.1%. Plots are presented below for linearity, non-linearity, and variance versus mean signal at low and high levels.

The images were analyzed to obtain mean signal level and variance. The plots show that the non linearity is < 0.1%. The definition used for non-linearity is:

Where the mean is the unbiased signal level.

Figure 1: Linearity - low level

Figure 2: Linearity – high level

Figure 3: Non-linearity - low-level

Figure 4: Non-linearity - high level

Figure 5: Variance vs Mean signal - low level

Figure 6: Variance vs Mean signal - high level

8. Detector History

The following documents contain the detailed testing procedures and results.

Engineering detector testing test20001027/test20001027.htm 27 Oct 2000
Science detector testing test20001115/test20001115.htm 15 Nov 2000
Science detector testing test20001115/test20001122.htm 22 Nov 2000

9. Images

The following table lists the images in the delivered dataset. They are a subset of the images used for the analysis shown in this document (and the linked documents).

Directory	Image	Type	Comment
noiseexps	noise0001.fits	Bias	These four exposures were used to measure noise and gain at medium readout speed.
	noise0002.fits	Bias
	noise0003.fits	Flat
	noise0004.fits	Flat

	noise0005.fits	Bias	These four exposures were used to measure noise and gain at fast readout speed.
	noise0006.fits	Bias
	noise0007.fits	Flat
	noise0008.fits	Flat

darkexps	bias0005-0010	Bias	Bias taken prior to the following darks for dark current tests, and bias stability tests.
	dark0007-0011	Dark, 2 hour exposure
	bias0011-0015	Bias	Bias taken after to the above darks for dark current tests, and bias stability tests.

	darkcurrent0007	text	Results file from dark current algorithm
	darkcurrent0007.fits	Dark current	dark0007 with overscan and bias subtraction
	darkcurrent0008	text	Results file from dark current algorithm
	darkcurrent0008.fits		dark0008 with overscan and bias subtraction

coude	focus0004.fits
	focus0006.fits
	focus0007.fits

	spectra0052.fits
	spectra0053.fits
	spectra0055.fits

cteexps	cte1thou0001red	Flat, 1000 counts
	cte10thou0001red	Flat, 10 000 counts
	cte50thou0001red	Flat 50 000 counts

quanteffexps	qe0001_170K,
	qe0002_170K
	qe0001_180K
	qe0002_180K
	qe0001_184K
	qe0002_184K
	qe0003_170K
	qe0004_170K
	qe0001_150K
	qe0002_150K
	qe_0001_160K
	qe0002_160k
	qe0005_170K
	qe0006_170K

linearityexps	linlow0001	0	The flats taken and their corresponding exposure time in seconds for low-level linearity measurements.
	linlow0002	0
	linlow0003	.100
	linlow0004	.100
	linlow0005	.500
	linlow0006	.500
	linlow0007	.200
	linlow0008	.200
	linlow0009	.500
	linlow0010	.500
	linlow0011	.300
	linlow0012	.300
	linlow0013	.500
	linlow0014	.500
	linlow0015	.400
	linlow0016	.400
	linlow0017	.500
	linlow0018	.500

	linhigh0001	0	The flats taken and their corresponding exposure time in seconds for high-level linearity measurements.
	linhigh0002	0
	linhigh0003	1
	linhigh0004	1
	linhigh0005	10
	linhigh0006	10
	linhigh0007	7
	linhigh0008	7
	linhigh0009	10
	linhigh0010	10
	linhigh0011	13
	linhigh0012	13
	linhigh0013	10
	linhigh0014	10
	linhigh0015	19
	linhigh0016	19
	linhigh0017	10
	linhigh0018	10
	linhigh0019	25
	linhigh0020	25
	linhigh0021	10
	linhigh0022	10
	linhigh0023	31
	linhigh0024	31
	linhigh0025	10
	linhigh0026	10
	linhigh0027	37
	linhigh0028	37
	linhigh0029	10
	linhigh0030	10
	linhigh0031	43
	linhigh0032	43
	linhigh0033	10
	linhigh0034	10
	linhigh0035	49
	linhigh0036	49
	linhigh0037	10
	linhigh0038	10
	linhigh0039	55
	linhigh0040	55
	linhigh0041	10
	linhigh0042	10
	linhigh0043	61
	linhigh0044	61
	linhigh0045	10
linhigh0046	10

Table 7: Data Pack Image List