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LOR1a Parameters



Device Identification

Chip name                             LOR1a
Year of manufacture                   1997
Serial number                         W20-1-1
First light on La Palma               June 1997
Description: Replacement for failed LOR1 using same cryostat

Operational Characteristics

Measurements made in lab.
Speed            
Standard      
Quick         
Turbo         
Bias(ADU)
2486
1311
269
Gain(e/ADU)
0.63
0.92
1.41
Noise(e)
6.4
8.1
11.1
Linear to(ADU)
60K 
(see below)
40K 
(see below)
25K 
(see below)
Readout time(s)
.
142
.
Standard linearity
Quick Linearity
Turbo linearity
Vertical CTE                          0.999991
Horizontal CTE                        0.99956

Physical Characteristics

Pixel Scale (isis blue)               0.21 arc/pixel
X Pixel size                          15 microns
Y Pixel size                          15 microns
X size in pixels of digitised area    2148
Y size in pixels of digitised area    2148
X size of useful imaging area         2048
Y size of useful imaging area         2048
X start of useful imaging area        ?
Ystart of useful imaging area         ?
LN2 capacity of cryostat              2.5 litres
Cryostat window thickness             4mm
Distance from window to CCD           . mm
Cryostat window size                  .

Operational Parameters

Flooding type                         .
Operating temperature                 153K
Prefered amplifier                    R
Network name                          CCD2
Anti-blooming available               no
Orientation of instrument for prefered output
Telemetry values :
RD    6.49V     V-   -15.00V     H+SL  -17.99V
 OD    6.99V     H++    0.00V     R-SL    1.59V
 OG  -10.00V     H-   -11.99V     R+SL  -17.99V
 VSS  -6.99V     R+    -1.99V
 ABG -10.00V     R-   -11.99V
 BG    2.99V     V-SL   2.19V
 ABD   6.99V     V+SL -17.50V
 V++  -3.99V     H-SL   1.59V

Measured Characteristics

Quantum Efficiency
 
Peak non-uniformity in QE across chip  .
Dark current                           11 e/hour
Point spread function                  .
Full well bloom limit                  148000 elctrons
Chip flatness                          21 micron convex bow
Cosmetics: Column defect down centre of chip


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Last modified: 21 November 2010