horiba JOBIN YVON SYNAPSE, User Manual

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Detector System Component Description
45
Gain Selections
Synapse provides the end-user with 16-bit pixel processing capability that includes three
gain options selectable via SynerJY software as specified in Table IV below. For each
gain setting, typical system level transfer function numbers are provided in electrons per
ADC count based on the typical CCD amplifier response (uV / e-) for each sensor
offering.
Table IV.
Synapse Gain Options Versus Sensor Offerings
CCD
Sensor
Pixel
Format
Pixel Size Gain Setting
Typical System
Transfer
Function
(e- / ADC Cnt)
High Sensitivity 1.40
Best Dynamic Range 2.80
E2V
CCD30
1024 x 256 26 µm sq
High Light 18.70
High Sensitivity 1.06
Best Dynamic Range 2.12
E2V
CCD42
2048 X 512 13.5 µm sq
High Light 7.06
High Sensitivity 0.88
Best Dynamic Range 2.94
E2V
CCD77
512 X 512 24 µm sq
High Light 11.77
With the Synapse’s flexible gain setting capability, low light level applications would
take advantage of the High Sensitivity mode gain setting, while experiments involving
elevated photon flux levels would benefit the most from the High Light gain setting.
A brief discussion of each gain setting mode associated with the Synapse CCD Detection
system follows:
High Sensitivity Mode
For low light level applications, most end-users are willing to trade off dynamic range
performance for increased sensitivity so that even the smallest photonic occurrence can
be detected. Utilization of this High Sensitivity mode, from a statistical averaging point
of view, allows small variations in light level to be detected even on a 1 e- scale.
It should also be noted that operating in this high gain mode allows end-users with
medium light applications to acquire the same photon flux information two to three times
faster (depending on the selected CCD) when compared to using the Best Dynamic
Range gain setting mode.
Note:
Calibration data is provided with each Synapse
CCD detection system, defining the transfer
function in electrons/count for the incorporated
CCD sensor for each available gain setting.