Photon counting unit
Photon counting unit is designed to convert single photoelectron pulses from a photomultiplier tube into 5 V digital signals by use of the built-in amplifier and discriminator circuits. Photon counting with a high S/N ratio can be performed by simply connecting a counter to the output of the photon counting unit. The C9744 uses a high-speed electronic circuit that allows measurement with an excellent output linearity up to 107 s-1. The C9744 also has a prescaler (division by 10) eliminating the need for a high-speed counter.
|Discrimination level (input conversion)||-0.4 to -16||mV|
|Required PMT gain||Approx. 3 × 106||-|
|Prescaler||÷1 / ÷10||-|
|Count linearity||÷1||4 × 106||s-1|
|÷10||1 × 107|
|Output pulse||CMOS 5 V, POSITIVE LOGIC||-|
|Output pulse width||÷1||10||ns|
|÷10||Depends on count rate||-|
|Supply voltage||+5.0 V ± 0.2 V, 130 mA / -5.0 V ± 0.2 V, 50 mA||-|
|Power||DIN (6-pin) *1||-|
|Dimensions （W × H × D）||90 × 32 × 140 (excluding rubber feet and projecting parts)||mm|
|Operating ambient temperature||0 to +50||℃|
|Operating ambient humidity *2||Below 80||%|
|Storage temperature||-15 to +60||℃|
|Storage humidity *2||Below 85||%|
*1 Supplied with a cable (1.5 m) attached to the mating plug.
*2 No condensation
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